Accretion in Close Pre-Main-Sequence Binaries

Accretion in Close Pre-Main-Sequence Binaries We propose to use COS to observe the circumbinary accretion flow in pre-main sequence binaries as a function of orbital phase. These observations will help us understand how the magnetosphere captures circumbinary gas, test model predictions regarding the importance of the mass ratio in directing the accretion flows, and study the kinematics of the gas filling the circumbinary gap. We will observe UZ Tau E (mass ratio q=0.3, e=0.33) and DQ Tau (q=1, e=0.58) in four phases, over three orbital periods, using G160M and G230L. The targets are Classical T Tauri stars for which the circumstellar disks are severely truncated. Our primary observables will be the CIV (1550 A) lines, formed at the footpoints of the accretion flow onto the star. We expect to observe the ebb and flow of the line shape, centroid, and flux as a function of orbital phase. The low-resolution NUV continuum observations will provide an independent measurement of the total accretion rate.

We will observe DQ Tau and UZ Tau E. Name | DQ Tau | UZ Tau E SpT | M0 | M0 V | 13.66 | 14.99 Av (mag) | 1.0 | 1.5 Mdot (10^{-8} msun/yr) | 2.5 | 3 Fciv$ (10^{-14} ergs sec^{-1} cm^{-2}) | 1.4 | 1.4 F2500 (10^{-15} ergs sec^{-1} cm^{-2} \AA^{-1}) | 0.75 | 4.5 U-band limits (From Herbst) median | 15.7 (2.2e-15 ergs/sec/cm2/A) | 13.8 (1.3e-14 ergs/sec/cm2/A) max | 13.7 (1.3e-14) | 13.03 (2.5e-14) min | 16.7 (9e-16) | 14.45 (7.0e-15) Orbital Parameters P (days) | 15.8043±0.0024 | 19.131±0.003 T(JD-2440000) | 9582.54±0.05 | 11328.3±0.5 First periastron passage of 2011 (Jan 1 2011 = 15 562.49900) JD-2440000 | 15572.4 | 15575.382 q | 0.97 | 0.30 M1 | 0.65 | 1.30 i (deg) | 23 | 54 e | 0.58 | 0.33 a (AU) | 0.13 | 0.15 DelVperi | 40 | 55 DelVapo | 12 | 25 Original Observing setup: -G160M at Lam=1577A (t~2000 sec), R~2000 from 1382-1556A and 1577-1752A. The resolution is large enough to resolve CIV. -G230L at Lam=2950A (t~600 sec), from 1650-2050A and 2750-3150A. Request: -Total of 24 orbits. -Four phase points per binary orbit: phi=0.0 (periastron), 0.2, 0.50 (apastron), and 0.7. Phase requests have a precision of 0.05 (~1 d). -Three binary orbits per star (consecutive in binary period) -Two targets -Periods and times of periastron passage are very well known and no preparatory observations are needed to predict them. Original request: We reach (according to the ETC) S/N~15 in CIV in both stars. S/N~6 (S/N~14) in the continuum at 2800A for DQ Tau (UZ Tau E). -All the estimates are per resolution element. Timing requirements: HST observations complemented with simultaneous ground-based veiling observations, \hal, \hei, and \caii, at high enough resolutions to trace the development of accretion flows (R~40000). To insure simultaneous ground based observations we require that HST observations be done on 2011. The JD on Jan 1 2011 is HJD-2 440 000 = 15 562.4990034653 For UZ Tau, the first periastron passage of 2011 occurs on 15575.382 For DQ Tau, it occurs on 15572.4 General Comments: In the FUV, COS is 10x faster than STIS. The goal of the FUV observations is to detect flux and velocity changes (primarily in CIV, but also in other lines present in the spectral range, like SiIV and H2) as a function of orbital phase. The inclination of the circumbinary disks is low enough that it is unlikely they will suffer from variable extinction from disk dust in the line-of-sight. For UZ Tau E, the CIV line flux is estimated from the published low-resolution ACS/SBC PR130L spectrum (Ingleby et al. 2009), for which the total flux in both doublet lines is 1.4 x 10^{-14} ergs sec^{-1} cm^{-2}. For optically thin emission (valid in some CTTSs, see Ardila 2007), the stronger doublet line has a flux of 1.0 x 10^{-14} ergs sec^{-1} cm^{-2}. With the empirical relationship between \mdot \ and CIV luminosity established by Johns-Krull et al. (2000), \mdot \ and extinction from Valenti et al. (1993), the predicted flux is 1.7 x 10^{-14} ergs sec^{-1} cm^{-2}. The models by AL96 predict a decrease (increase) in \mdot \ by a factor of 2 at apastron (periastron), which will result in a comparable decrease (increase) in CIV flux. Given this, we assume -- for the purposes of S/N calculation -- an average 1.4 x 10^{-14} ergs sec^{-1} cm^{-2} for the strong CIV line. The NUV flux and acquisition exposures are estimated from an IUE spectrum scaled at 3600A to the median of the Herbst measurements. UZ Tau W (another young, but wider binary system) is 3.7'' away from UZ Tau E and has comparable optical and infrared properties (Jensen et al. 1996). This implies that its UV flux will not contaminate the COS' 2.5'' aperture. Both targets have modest outflow indicators and therefore the CIV lines are not expected to be contaminated by shocks in the T Tauri wind. To estimate the CIV flux for DQ Tau we use, again, the relationship between accretion rate and line luminosity derived by Johns-Krull et al. (2000) (see Table 1). While the accretion rate is 10x smaller than in UZ Tau E, the extinction is also smaller, resulting in similar predicted CIV flux. To estimate the continuum flux at 2500A we use an unpublished HST spectrum (PI Hartigan, PID 9812; ACS/HRC PR200L, 1700A to 3600\AA, R~60). This continuum value can also be used to confirm the CIV estimate. For DQ Tau, the continuum flux at 2500A is 100 times less than the same continuum flux in TW Hya (Herczeg et al. 2004). Assuming that the CIV line flux scales as the continuum flux (as both are accretion indicators) and taking into account the extinction differential between the two stars, we arrive to an estimate comparable to that already given in Table 1. Again, the S/N reachable in 2000 sec will be ~15. In 600 sec we will reach S/N~6 in G230L. This is not much, but we will use the whole G230L to estimate the excess, therefore a high S/N in a given resolution element is not crucial. For H2, kinematic analysis will provide information as to its origin (Herczeg et al. 2006). The systematic error in the COS wavelength calibration is 15 \kms, dominated by pointing uncertainties, and such uncertainty will be the limiting factor in our analysis of H2. ISM AND CIRCUMSTELLAR MATTER 12 false 0.0 0.0 false false false false SUPPORTED STAR T TAURI STAR *****UPDATE***** I have checked against F330W (2003.994) observations in the archive. Comparing the GSC2.3 (1991.79) coordinates to the F330W, I get the following proper motion: -39.94e-3 asec/yr, -18.0e-3 asec/yr. The predicted proper coords at 2011.17 are 53.0 sec, 59'59.87". So, even though the real proper motion in RA is very different, it is still very little difference. ****************************** Coordinates are ICRS from GSCR2.3 (http://gsss.stsci.edu/webservices/GSC2/GSC2WebForm.aspx) Proper motion from Ducourant et al. 2006. Ducourant et al 2005 gives pm 0,-6 hstID: NA9F000083 Object is in Taurus: 140 pc HBC-72 J2000 04 46 53.0500 +17 00 0.20 J2000 U=15.54 (Kenyon & Hartmann 1995) STAR T TAURI STAR ****UPDATE***** GSC2.3 coordinates are 04 32 42.9584; +25 52 31.33 (ICRS; 1994.78). F555W coordinates are 42.996 ; 30.74 (J2000; 1994.562002) F165LP coordinates are 43.141; 30.63 (J2000, 2007.62) This implies that the pm values given in Ducourant are too small for RA and too large for Dec. From the F555W observations to the F165LP observations, the PM is 0.011104306 sec/yr; -0.008423956 asec/yr. I'll therefore use these values plus the 2007 coordinates. ************************************ This object was generated by the targetselector and retrieved from the SIMBAD database. Coordinates are ICRS from GSC2.3 Proper motion from Ducourant et al. 2005, reported error is 7 mas (per year????) hstID: N9QK000016 Object is in Taurus: 140 pc UZ Tau W is 3.7" away from UZ Tau E (Jensen et al. 2007), and it is itself a binary, with a separation of 0.359" (Ghez et al. 1995). UZ Tau W is classified as Class III by Hartmann 2002 (which probably refers to the combined system). Approx same brightness as E (from SIMBAD) HBC52 UZ-TAU-A J2000 04 32 43.0400 +25 52 31.10 J2000 Galex NUV mag=16.4882 COS/NUV Spectroscopic No No G230L 2950 COS/FUV Spectroscopic No No G160M 1577 COS/NUV Spectroscopic No No G230L 2950 COS/FUV Spectroscopic No No G160M 1577 Timing link suitability includes constraints ([Sequence (01 02 03 04 05 06 07 08 09 10 11 12) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. UZ Tau, 1st epoch, Phase 0 1296655596000 65.0 (Tic-Visit :proposal-id 12161 :visit-id "01" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:07.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 87120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2885 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) false 1 0 Measured extinction is Av=1.5, E(B-V)=0.5. GALEX gives E(b-V)=1.5, based on DIRBE maps +++++++++++++++++++++++++++++++ The current calculation is based on linearly extrapolating the IUE spectrum to 3600 A and scaling to the median U band flux. This gives 30 sec. (COS.A370066). Estimates below give 45 sec, so I choose those. +++++++++++++++++++++++++++++++ With IUE data (Valenti et al. spectrum, with fluxes below 2000 A set to 0), S/N=40: Mirror A: brightest pix:115.7 cts/sec, 2 sec Mirror B: brightest pix: 5 cts/sec, 45 sec +++++++++++++++++++++++++++++++ NUV=16.4882, S/N=40: MirrorA Flat continuum/no extinction: brightest pix is 148 cts/sec, 1.5 sec Flat continuum/extinction: brightest pix is 190 cts/sec, 1.2 sec MirrorB Flat continuum/no extinction: brightest pix is 7 cts/sec, 31 sec Flat continuum/extinction: brightest pix is 9 cts/sec, 25 sec 100 secs => S/N=20 in continuum at 2800 A (for median flux) COS.A370073 From the IUE spectrum, ETC gives a buffer time of 4223 secs. For the max. flux, the buffer time is 2668 sec. I will choose 1500. 1000 sec -> S/N=12 at 1550 A. (1.4e-14 ergs/s/cm2) (COS.A370076) Buffer time: 30000 Timing link suitability includes constraints ([Sequence (01 02 03 04 05 06 07 08 09 10 11 12) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. UZ Tau, 1st epoch, Phase 1 1296961623000 70.0 (Tic-Visit :proposal-id 12161 :visit-id "02" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:10.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 87120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2885 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Sequence (01 02 03 04 05 06 07 08 09 10 11 12) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. UZ Tau, 1st epoch, Phase 2 1297433444000 76.84688850084132 (Tic-Visit :proposal-id 12161 :visit-id "03" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:13.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 87120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2885 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Sequence (01 02 03 04 05 06 07 08 09 10 11 12) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. UZ Tau, 1st epoch, Phase 3 1297814560000 76.84688850084132 (Tic-Visit :proposal-id 12161 :visit-id "04" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:16.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 87120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2885 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Sequence (01 02 03 04 05 06 07 08 09 10 11 12) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. UZ Tau, 2nd epoch, Phase 0 1298266332000 76.84688850084132 (Tic-Visit :proposal-id 12161 :visit-id "05" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:19.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 87120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2885 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) false 1 0 Measured extinction is Av=1.5, E(B-V)=0.5. GALEX gives E(b-V)=1.5, based on DIRBE maps +++++++++++++++++++++++++++++ total time: 9xexpo+ +++++++++++++++++++++++++++++++ With IUE data (Valenti et al. spectrum, with fluxes below 2000 A set to 0), S/N=40: Mirror A: brightest pix:115.7 cts/sec, 2 sec Mirror B: brightest pix: 5 cts/sec, 45 sec +++++++++++++++++++++++++++++++ NUV=16.4882, S/N=40: MirrorA Flat continuum/no extinction: brightest pix is 148 cts/sec, 1.5 sec Flat continuum/extinction: brightest pix is 190 cts/sec, 1.2 sec MirrorB Flat continuum/no extinction: brightest pix is 7 cts/sec, 31 sec Flat continuum/extinction: brightest pix is 9 cts/sec, 25 sec Timing link suitability includes constraints ([Sequence (01 02 03 04 05 06 07 08 09 10 11 12) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. UZ Tau, 2nd epoch, Phase 1 1298617085000 61.0 (Tic-Visit :proposal-id 12161 :visit-id "06" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:22.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 87120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2885 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) false 1 0 Measured extinction is Av=1.5, E(B-V)=0.5. GALEX gives E(b-V)=1.5, based on DIRBE maps +++++++++++++++++++++++++++++ total time: 9xexpo+ +++++++++++++++++++++++++++++++ With IUE data (Valenti et al. spectrum, with fluxes below 2000 A set to 0), S/N=40: Mirror A: brightest pix:115.7 cts/sec, 2 sec Mirror B: brightest pix: 5 cts/sec, 45 sec +++++++++++++++++++++++++++++++ NUV=16.4882, S/N=40: MirrorA Flat continuum/no extinction: brightest pix is 148 cts/sec, 1.5 sec Flat continuum/extinction: brightest pix is 190 cts/sec, 1.2 sec MirrorB Flat continuum/no extinction: brightest pix is 7 cts/sec, 31 sec Flat continuum/extinction: brightest pix is 9 cts/sec, 25 sec Timing link suitability includes constraints ([Sequence (01 02 03 04 05 06 07 08 09 10 11 12) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. UZ Tau, 2nd epoch, Phase 2 1299117351000 76.84688850084132 (Tic-Visit :proposal-id 12161 :visit-id "07" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:25.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 87120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "07" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2885 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) false 1 0 Measured extinction is Av=1.5, E(B-V)=0.5. GALEX gives E(b-V)=1.5, based on DIRBE maps +++++++++++++++++++++++++++++ total time: 9xexpo+ +++++++++++++++++++++++++++++++ With IUE data (Valenti et al. spectrum, with fluxes below 2000 A set to 0), S/N=40: Mirror A: brightest pix:115.7 cts/sec, 2 sec Mirror B: brightest pix: 5 cts/sec, 45 sec +++++++++++++++++++++++++++++++ NUV=16.4882, S/N=40: MirrorA Flat continuum/no extinction: brightest pix is 148 cts/sec, 1.5 sec Flat continuum/extinction: brightest pix is 190 cts/sec, 1.2 sec MirrorB Flat continuum/no extinction: brightest pix is 7 cts/sec, 31 sec Flat continuum/extinction: brightest pix is 9 cts/sec, 25 sec Timing link suitability includes constraints ([Sequence (01 02 03 04 05 06 07 08 09 10 11 12) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. UZ Tau, 2nd epoch, Phase 3 1299447931000 76.84688850084132 (Tic-Visit :proposal-id 12161 :visit-id "08" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:28.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 87120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "08" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2885 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) false 1 0 Measured extinction is Av=1.5, E(B-V)=0.5. GALEX gives E(b-V)=1.5, based on DIRBE maps +++++++++++++++++++++++++++++ total time: 9xexpo+ +++++++++++++++++++++++++++++++ With IUE data (Valenti et al. spectrum, with fluxes below 2000 A set to 0), S/N=40: Mirror A: brightest pix:115.7 cts/sec, 2 sec Mirror B: brightest pix: 5 cts/sec, 45 sec +++++++++++++++++++++++++++++++ NUV=16.4882, S/N=40: MirrorA Flat continuum/no extinction: brightest pix is 148 cts/sec, 1.5 sec Flat continuum/extinction: brightest pix is 190 cts/sec, 1.2 sec MirrorB Flat continuum/no extinction: brightest pix is 7 cts/sec, 31 sec Flat continuum/extinction: brightest pix is 9 cts/sec, 25 sec 90 secs => S/N=5 in continuum at 2800 A From the IUE spectrum, ETC gives a buffer time of 5016 secs. Twice the flux gives 3768 secs. So, I'll choose 2000 secs UZ Tau, 2nd epoch, Phase 3 HOPR repeat of visit 8 (Tic-Visit :proposal-id 12161 :visit-id "25" :proposal-version -1 :trans-version "20100902" :date "16-Mar-2011 07:15:05.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 87120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "25" :obset-id "25" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "25" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2885 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) false 1 0 Measured extinction is Av=1.5, E(B-V)=0.5. GALEX gives E(b-V)=1.5, based on DIRBE maps +++++++++++++++++++++++++++++ total time: 9xexpo+ +++++++++++++++++++++++++++++++ With IUE data (Valenti et al. spectrum, with fluxes below 2000 A set to 0), S/N=40: Mirror A: brightest pix:115.7 cts/sec, 2 sec Mirror B: brightest pix: 5 cts/sec, 45 sec +++++++++++++++++++++++++++++++ NUV=16.4882, S/N=40: MirrorA Flat continuum/no extinction: brightest pix is 148 cts/sec, 1.5 sec Flat continuum/extinction: brightest pix is 190 cts/sec, 1.2 sec MirrorB Flat continuum/no extinction: brightest pix is 7 cts/sec, 31 sec Flat continuum/extinction: brightest pix is 9 cts/sec, 25 sec 90 secs => S/N=5 in continuum at 2800 A From the IUE spectrum, ETC gives a buffer time of 5016 secs. Twice the flux gives 3768 secs. So, I'll choose 2000 secs Timing link suitability includes constraints ([Sequence (01 02 03 04 05 06 07 08 09 10 11 12) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. UZ Tau, 3rd epoch, Phase 0 1299968530000 76.84688850084132 (Tic-Visit :proposal-id 12161 :visit-id "09" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:31.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 87120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "09" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2885 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) false 1 0 Measured extinction is Av=1.5, E(B-V)=0.5. GALEX gives E(b-V)=1.5, based on DIRBE maps +++++++++++++++++++++++++++++ total time: 9xexpo+ +++++++++++++++++++++++++++++++ With IUE data (Valenti et al. spectrum, with fluxes below 2000 A set to 0), S/N=40: Mirror A: brightest pix:115.7 cts/sec, 2 sec Mirror B: brightest pix: 5 cts/sec, 45 sec +++++++++++++++++++++++++++++++ NUV=16.4882, S/N=40: MirrorA Flat continuum/no extinction: brightest pix is 148 cts/sec, 1.5 sec Flat continuum/extinction: brightest pix is 190 cts/sec, 1.2 sec MirrorB Flat continuum/no extinction: brightest pix is 7 cts/sec, 31 sec Flat continuum/extinction: brightest pix is 9 cts/sec, 25 sec UZ Tau, 3rd epoch, Phase 0 HOPR repeat of visit 9 (Tic-Visit :proposal-id 12161 :visit-id "26" :proposal-version -1 :trans-version "20100902" :date "16-Mar-2011 07:15:06.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 87120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "26" :obset-id "26" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "26" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2885 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) false 1 0 Measured extinction is Av=1.5, E(B-V)=0.5. GALEX gives E(b-V)=1.5, based on DIRBE maps +++++++++++++++++++++++++++++ total time: 9xexpo+ +++++++++++++++++++++++++++++++ With IUE data (Valenti et al. spectrum, with fluxes below 2000 A set to 0), S/N=40: Mirror A: brightest pix:115.7 cts/sec, 2 sec Mirror B: brightest pix: 5 cts/sec, 45 sec +++++++++++++++++++++++++++++++ NUV=16.4882, S/N=40: MirrorA Flat continuum/no extinction: brightest pix is 148 cts/sec, 1.5 sec Flat continuum/extinction: brightest pix is 190 cts/sec, 1.2 sec MirrorB Flat continuum/no extinction: brightest pix is 7 cts/sec, 31 sec Flat continuum/extinction: brightest pix is 9 cts/sec, 25 sec Timing link suitability includes constraints ([Sequence (01 02 03 04 05 06 07 08 09 10 11 12) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. UZ Tau, 3rd epoch, Phase 1 1300250125000 76.84688850084132 (Tic-Visit :proposal-id 12161 :visit-id "10" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:33.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 87120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "10" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2885 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) false 1 0 Measured extinction is Av=1.5, E(B-V)=0.5. GALEX gives E(b-V)=1.5, based on DIRBE maps +++++++++++++++++++++++++++++ total time: 9xexpo+ +++++++++++++++++++++++++++++++ With IUE data (Valenti et al. spectrum, with fluxes below 2000 A set to 0), S/N=40: Mirror A: brightest pix:115.7 cts/sec, 2 sec Mirror B: brightest pix: 5 cts/sec, 45 sec +++++++++++++++++++++++++++++++ NUV=16.4882, S/N=40: MirrorA Flat continuum/no extinction: brightest pix is 148 cts/sec, 1.5 sec Flat continuum/extinction: brightest pix is 190 cts/sec, 1.2 sec MirrorB Flat continuum/no extinction: brightest pix is 7 cts/sec, 31 sec Flat continuum/extinction: brightest pix is 9 cts/sec, 25 sec 90 secs => S/N=5 in continuum at 2800 A From the IUE spectrum, ETC gives a buffer time of 5016 secs. Twice the flux gives 3768 secs. So, I'll choose 2000 secs Timing link suitability includes constraints ([Sequence (01 02 03 04 05 06 07 08 09 10 11 12) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. UZ Tau, 3rd epoch, Phase 2 1300793497000 76.84688850084132 (Tic-Visit :proposal-id 12161 :visit-id "11" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:36.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 87120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "11" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2885 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) false 1 0 Measured extinction is Av=1.5, E(B-V)=0.5. GALEX gives E(b-V)=1.5, based on DIRBE maps +++++++++++++++++++++++++++++ total time: 9xexpo+ +++++++++++++++++++++++++++++++ With IUE data (Valenti et al. spectrum, with fluxes below 2000 A set to 0), S/N=40: Mirror A: brightest pix:115.7 cts/sec, 2 sec Mirror B: brightest pix: 5 cts/sec, 45 sec +++++++++++++++++++++++++++++++ NUV=16.4882, S/N=40: MirrorA Flat continuum/no extinction: brightest pix is 148 cts/sec, 1.5 sec Flat continuum/extinction: brightest pix is 190 cts/sec, 1.2 sec MirrorB Flat continuum/no extinction: brightest pix is 7 cts/sec, 31 sec Flat continuum/extinction: brightest pix is 9 cts/sec, 25 sec Timing link suitability includes constraints ([Sequence (01 02 03 04 05 06 07 08 09 10 11 12) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. UZ Tau, 3rd epoch, Phase 3 1301095454000 76.84688850084132 (Tic-Visit :proposal-id 12161 :visit-id "12" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:39.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 87120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "12" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2885 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) false 1 0 Measured extinction is Av=1.5, E(B-V)=0.5. GALEX gives E(b-V)=1.5, based on DIRBE maps +++++++++++++++++++++++++++++ total time: 9xexpo+ +++++++++++++++++++++++++++++++ With IUE data (Valenti et al. spectrum, with fluxes below 2000 A set to 0), S/N=40: Mirror A: brightest pix:115.7 cts/sec, 2 sec Mirror B: brightest pix: 5 cts/sec, 45 sec +++++++++++++++++++++++++++++++ NUV=16.4882, S/N=40: MirrorA Flat continuum/no extinction: brightest pix is 148 cts/sec, 1.5 sec Flat continuum/extinction: brightest pix is 190 cts/sec, 1.2 sec MirrorB Flat continuum/no extinction: brightest pix is 7 cts/sec, 31 sec Flat continuum/extinction: brightest pix is 9 cts/sec, 25 sec Timing link suitability includes constraints ([Sequence (13 14 15 16 17 18 19 20 21 22 23 24) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. DQ Tau, 1st epoch, Phase 0 1297426697000 80.81948546360468 (Tic-Visit :proposal-id 12161 :visit-id "13" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:43.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 78432 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "13" :obset-id "13" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "13" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2877 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3249 :pcs-gap 0 ) false 1 0 MirrorB - With median U-band (15.7 - 2.21469e-15), one gets 180 sec (1.2 cts/sec) COS.A370297 ********************************************************** Mirror A With U=15.54 mag source and Flam propto lam, one gets 48 cts/sec in the brightest pixel. t=4.6 sec. For Flam propto lam^3 (like what works in UZ TauE), one gets 23 cts/sec in the brightest pixel. t=10 sec. Note that the U mag corresponds to (at 3600 A): 1810*10^(-0.4*15.54) Jy = 1810 * 10^(-0.4*15.54) * 1e-23 erg sec^-1 cm^-2 Hz^-1 = 1810 * 10^(-0.4*15.54) * 1e-23 * (3e18/3600^2) erg sec^-1 cm^-2 A^-1 = 2.5e-15 erg sec-1 cm-2 A-1 In 100 sec, with median 2.2e-15 flux at 3600A produces s/n=6. Buffer time 6500 sec. COS.A370300 With the max flux, the buffer time is 3900 sec. COS.A370301 ********************************************************************************* Ake et al. 2010 recommends separation FP-POS=1 and 4, which is 150 pix. Buffer time is ~6000 sec. COS.A370303 1000 sec: S/N=12, for 1.4e-14 in line at 1550A Buffer time=30000 Timing link suitability includes constraints ([Sequence (13 14 15 16 17 18 19 20 21 22 23 24) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. DQ Tau, 1st epoch, Phase 1 1297745672000 73.0 (Tic-Visit :proposal-id 12161 :visit-id "14" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:45.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 78432 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "14" :obset-id "14" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "14" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2877 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3249 :pcs-gap 0 ) false 1 0 Mirror A With U=15.54 mag source and Flam propto lam, one gets 48 cts/sec in the brightest pixel. t=4.6 sec. For Flam propto lam^3 (like what works in UZ TauE), one gets 23 cts/sec in the brightest pixel. t=10 sec. Note that the U mag corresponds to (at 3600 A): 1810*10^(-0.4*15.54) Jy = 1810 * 10^(-0.4*15.54) * 1e-23 erg sec^-1 cm^-2 Hz^-1 = 1810 * 10^(-0.4*15.54) * 1e-23 * (3e18/3600^2) erg sec^-1 cm^-2 A^-1 = 2.5e-15 erg sec-1 cm-2 A-1 Timing link suitability includes constraints ([Sequence (13 14 15 16 17 18 19 20 21 22 23 24) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. DQ Tau, 1st epoch, Phase 2 1298157064000 81.67806535430458 (Tic-Visit :proposal-id 12161 :visit-id "15" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:48.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 78432 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "15" :obset-id "15" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "15" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2877 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3249 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Sequence (13 14 15 16 17 18 19 20 21 22 23 24) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. DQ Tau, 1st epoch, Phase 3 1298382053000 81.67806535430458 (Tic-Visit :proposal-id 12161 :visit-id "16" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:51.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 78432 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "16" :obset-id "16" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "16" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2877 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3249 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Sequence (13 14 15 16 17 18 19 20 21 22 23 24) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. DQ Tau, 2nd epoch, Phase 0 1298829855000 81.67806535430458 (Tic-Visit :proposal-id 12161 :visit-id "17" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:54.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 78432 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "17" :obset-id "17" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "17" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2877 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3249 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Sequence (13 14 15 16 17 18 19 20 21 22 23 24) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. DQ Tau, 2nd epoch, Phase 1 1299108473000 73.0 (Tic-Visit :proposal-id 12161 :visit-id "18" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:57.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 78432 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "18" :obset-id "18" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "18" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2877 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3249 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Sequence (13 14 15 16 17 18 19 20 21 22 23 24) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. DQ Tau, 2nd epoch, Phase 2 1299485448000 81.67806535430458 (Tic-Visit :proposal-id 12161 :visit-id "19" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:20:59.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 78432 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "19" :obset-id "19" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "19" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2877 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3249 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Sequence (13 14 15 16 17 18 19 20 21 22 23 24) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. DQ Tau, 2nd epoch, Phase 3 1299746092000 81.67806535430458 (Tic-Visit :proposal-id 12161 :visit-id "20" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:21:02.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 78432 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "20" :obset-id "20" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "20" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2877 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3249 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Sequence (13 14 15 16 17 18 19 20 21 22 23 24) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. DQ Tau, 3rd epoch, Phase 0 1300209995000 81.67806535430458 (Tic-Visit :proposal-id 12161 :visit-id "21" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:21:05.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 78432 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "21" :obset-id "21" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "21" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2877 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3249 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Sequence (13 14 15 16 17 18 19 20 21 22 23 24) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. DQ Tau, 3rd epoch, Phase 1 1300434242000 81.67806535430458 (Tic-Visit :proposal-id 12161 :visit-id "22" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:21:08.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 78432 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "22" :obset-id "22" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "22" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2877 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3249 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Sequence (13 14 15 16 17 18 19 20 21 22 23 24) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. DQ Tau, 3rd epoch, Phase 2 1300865497000 81.67806535430458 (Tic-Visit :proposal-id 12161 :visit-id "23" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:21:10.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 78432 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "23" :obset-id "23" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "23" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2877 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3249 :pcs-gap 0 ) false 1 0 Timing link suitability includes constraints ([Sequence (13 14 15 16 17 18 19 20 21 22 23 24) within 70.0 days]) The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. DQ Tau, 3rd epoch, Phase 3 1301144276000 81.67806535430458 (Tic-Visit :proposal-id 12161 :visit-id "24" :proposal-version -1 :trans-version "20100505" :date "30-Oct-2010 17:21:13.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 78432 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12161 :visit-id "24" :obset-id "24" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12161 :visit-id "24" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2877 :al-overhead-at-end 0 :internal-dur-at-end 371 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3249 :pcs-gap 0 ) false 1 0