0 Assigned ID: 311 ----- Attempting Submission 1 (Fri Feb 24 06:06:43 GMT 2012) ----- HST Phase I Proposal 311 (hydrogen.apt) successfully submitted. ----- Attempting Submission 2 (Fri Feb 24 06:21:10 GMT 2012) ----- HST Phase I Proposal 311 (hydrogen.apt) successfully submitted. Changed as recommended: EXP 01 4x4 ACQ/SEARCH STEP-SIZE=1.2 FLUX-WT-FLR. EXP 03 the PEAKD exposure NUM-POS=5 STEP-SIZE=0.9 FLUX-WT-FLR. -903127089 ----- Attempting Submission 1 (Tue Jul 10 16:52:53 GMT 2012) ----- ----- Attempting Submission 2 (Fri Aug 03 16:52:24 GMT 2012) ----- ----- Attempting Submission 3 (Fri Dec 21 14:00:03 GMT 2012) ----- ----- Attempting Submission 4 (Thu Jan 17 20:38:16 GMT 2013) ----- I have run the visit planner multiple times, on 3 different computers, and APT keeps giving me the same message that the visit planner needs to be run. COS Observations of Pulsating DB White Dwarfs Convection is an important energy transfer process for most stars. Yet convection is poorly understood, and remains one of the largest sources of theoretical uncertainty in stellar modeling. Pulsating white dwarfs are the ideal laboratories to provide to a self consistent description of convection in different environments. We can combine asteroseismology with nonlinear analysis of pulsating white dwarf light curves to provide empirical descriptions of convection across the hydrogen and helium instability strips. However, our ability to interprete the convection turnover timescale and its dependence on effective temperature across the helium white dwarf instability strip is severely limited by the large errors associated with optical spectroscopic temperature determinations for these objects. Our proposed COS observations of pulsating DB white dwarfs will determine the slope of their energy distributions and determine the presence of trace abundances of H, C, O, and Si, leading to greatly improved effective temperature determinations for these stars. We have 6 targets: PG1351+489, WD1654+160, EC04207-4748, PG1115-158, QU Tel, and KIC8626021. The observations will be done with COS in TIME-TAG mode using the G130M grating with central wavelength of 1291 Angstroms and the G160M grating with a central wavelength of 1611 Angstroms. We chose these combinations to ensure that our spectra contain Lyman alpha, the 1305 Angstrom oxygen lines, CII 1335 Angstroms, and HeII 1640 Angstroms. White dwarfs have high surface gravities with broad spectral lines. We expect features between 3 and 4 Angstroms wide. For G130M, the spectroscopic features should cover 30-40 pixels and for G160M, 25-30 pixels. We will take advantage of COS's TIME-TAG capabilities to bin the photons by pulsation phase to directly measure temperature variations through the pulsation cycle. WDs have short pulsation periods (100-1000 s), allowing us to cover a sufficient number of pulsation cycles in the orbits requested. As an example of our exposure time estimates, we consider PG1115-158, with an effective temperature of 26010 K. We calculated a number of exposure times, using both blackbody simulations and previous GD358 observations. Taking into account guide star acquisition, NUV acq/image, TIME-TAG set up, exposure readout, and other overheads, we find that one orbit is required to achieve a S/N ratio of $\approx$ 25 with the G130M grating, and two orbits for the G160M grating. We performed similar estimates for our other targets with the aim of achieving spectra with S/N of 20-25. We do not require any non-standard calibrations. We will use FP-POS=ALL and use a flatfield to ensure maximum signal to noise. Our targets do not exceed the brightness limits for COS. Four targets are well isolated with accurate coordinates, and we use NUV ACQ/IMAGE. WD1654+160 and QU Tel have nearby cool companions, so we use FUV ACQ/SEARCH, ACQ/PEAKXD, and ACQ/PEAKD. We chose COS over STIS because its throughput is 10-30 times greater at our wavelengths of interest. Two targets are within the restricted RA ranges for cycle 20, but both stars are particularly important, as EC04207-4748 is one of our hotter targets and PG1115-158 is one of the cooler objects. HOT STARS 12 false false 0.0 0.0 false false false SUPPORTED STAR DB This object was generated by the targetselector and retrieved from the SIMBAD database. WD-1351+489 N5N9001608 J2000 J2000 B=16.38 STAR DB This object was generated by the targetselector and retrieved from the SIMBAD database. WD-2005-525 J2000 J2000 STAR DB This object was generated by the targetselector and retrieved from the SIMBAD database. WD-1115+158 N71R003840 J2000 J2000 B=16.12 STAR DB S2JD000159 J2000 J2000 J 15.86 H 15.581 STAR DB J2000 J2000 STAR DB J2000 J2000 STAR DB This object was generated by the targetselector and retrieved from the SIMBAD database. N2KD066558 KIC8626021 J2000 J2000 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G160M 1611 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G160M 1611 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G160M 1611 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G160M 1611 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G160M 1611 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G160M 1611 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G160M 1611 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G160M 1611 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12929 :visit-id "01" :proposal-version -1 :trans-version "20120802" :date "21-Dec-2012 08:59:25.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 783056 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12929 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12929 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3041 :al-overhead-at-end 0 :internal-dur-at-end 57 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3377 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12929 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3155 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3377 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12929 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3155 :al-overhead-at-end 0 :internal-dur-at-end 366 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3377 :pcs-gap 0 ) true 3 0 The scheduling data was generated by CASM 20.2. 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CASM was run in Phase II mode. 1350929930000 319.2985441827627 (Tic-Visit :proposal-id 12929 :visit-id "03" :proposal-version -1 :trans-version "20120802" :date "21-Dec-2012 08:59:30.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 930656 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12929 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12929 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2691 :al-overhead-at-end 0 :internal-dur-at-end 143 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3024 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12929 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2802 :al-overhead-at-end 0 :internal-dur-at-end 404 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3024 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 20.2. 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CASM was run in Phase II mode. /tmp/OPVisit2078346244476903455.xml This is a repeat of visit 04. 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CASM was run in Phase II mode. 1359633234000 297.2419807339939 (Tic-Visit :proposal-id 12929 :visit-id "05" :proposal-version -1 :trans-version "20120802" :date "21-Dec-2012 08:59:37.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 774352 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12929 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12929 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2677 :al-overhead-at-end 0 :internal-dur-at-end 67 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3015 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12929 :visit-id "05" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2793 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3015 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12929 :visit-id "05" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2793 :al-overhead-at-end 0 :internal-dur-at-end 366 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3015 :pcs-gap 0 ) true 3 0 The scheduling data was generated by CASM 20.2. CASM was run in Phase II mode. 1353193817000 94.48888959350683 (Tic-Visit :proposal-id 12929 :visit-id "06" :proposal-version -1 :trans-version "20120802" :date "21-Dec-2012 08:59:39.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 782832 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12929 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12929 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3094 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3430 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12929 :visit-id "06" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3208 :al-overhead-at-end 0 :internal-dur-at-end 414 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3430 :pcs-gap 0 ) true 2 0