Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5357 Report Date: 18-Jul-95:17:13 Version: ********** Check-in Date: ********** 1.Proposal Title: CEPHEID MASSES -CYC4-HIGH ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID COOL STARS GO 3 Long Term yrs 4541 Sub Category PULSATING STARS ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Erika Hr Bohm-vitense 3760 USA 206 543 4858 ------------------------------------------------------------------------------------ 7. Abstract For 2 decades the "Cepheid mass problem" has persisted: Mass determinations from standard evolutionary tracks and those from pulsation theory gave conflicting values. The luminosity of a Cepheid of given mass depends sensitively on the amount of convective overshoot above the core of the main sequence progenitor. Hence a good mass determination for the Cepheid with known luminosity will measure the amount of convective core overshoot. This knowledge is important for interpretation of HR diagrams of populous clusters in the LMC and especially for age determinations. It is also necessary for the understanding of the mixing processes in stars. IUE observations have revealed a number of Cepheid binaries with blue companions, whose orbits have now been determined by groundbased observations. We propose to measure the orbital radial velocities of 5 blue Cepheid companions on GHRS spectra for wavelengths shorter than 2000 A. The ratios of the orbital velocities for the binaries provide the mass ratios for the stars. The effective temperature of the companion can be determined from its energy distribution. For main sequence stars this also determines its mass. With GHRS spectra the orbital velocity ratio and thereby the mass ratio can be determined with an accuracLy of +/- 10 %. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 11.99 par: 0 10. Num targs pri: 7 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: HRS ------------------------------------------------------------------------------------ 12. Special sched req: Time Critical obs. ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5357 PI: Erika Hr Bohm-vitense Proposal Title: CEPHEID MASSES -CYC4-HIGH ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Erika Hr Bohm-Vitense 3760 U.S.A. Nancy R Evans INST. SPACE & TERRESTRIAL CANADA SCIENCE, NORTH YORK Kenneth G Carpenter 2856 U.S.A. ------------------------------------------------------------------------------------ 3. Description of proposed observations. The purpose of this proposal is to measure the orbital velocities of the main sequence companions of 5 classical Cepheids. We would like to observe each target twice. The observations are spread out over several observing cycles in order to observe most targets both at maximum and at minimum orbital velocity. The highest accuracy will be achieved if the observations can be done close to the middle of the observing windows given. After the successful repair mission we plan to use the GHRS with the 0.25" aperture and the Echelle B at 1722 A for the observations for S Mus B which has the brightest companion. For the comparison star HD 66591 the same instrument configuration has to be used. We want to use the G200M grating at 1860 A for the other stars. The star HD 172167 is the standard star for comparison with the other Cepheid companions. The G200M grating at 1860 A has to be used for those. These stars should also be observed twice to be sure that we measure the same velocity. We will have observed the standard stars once during cycle 3 and would like to observe them the second time during cycle 5. We would like a wavelength calibration before each stellar observation. We need to break up the exposures into subexposures of not more than 6 minutes duration each in order to avoid geomagnetic smearing They will then be aligned by cross- correlation and co-added. Page 3 ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. We need the UV capabilities and the large collection area of HST. The Cepheid companions can only be seen in the ultraviolet because in the optical their light is drowned by the light of the luminous Cepheid. Because of the temperature difference between the components ,the hotter main sequence companions dominate, however, for wavelengths shorter than 2000 A. Companion velocities can therefore be measured only on UV spectra. The companions (except for S Mus B) are too faint to be observed with IUE at high resolution, needed for radial velocity measurements. Orbits for all program stars have been determined from the ground. In some cases we are working with collaborators to obtain additional velocity data to improve the orbits. We have also observed all the program stars in low resolution with IUE to determine the spectral types and the UV absolute fluxes for the companions. For S Mus and SU Cyg we have demonstrated that the cross- correlation technique works well to measure velocity differences between the Cepheid and the companion. With IUE we have been able to measure absolute velocities with an accuracy of about +/-5 km/s. With HST we will be able to measure the companion orbital velocity directly with much higher acccuracy. For S Mus we anticipate improvements over IUE results because the Echelle dispersion should allow us to measure velocities to better than 1 km/s using fairly strong lines at 1722 A. We have estimated the exposure times from the fluxes on the IUE spectra, which are available for all the target stars. Count rates have been computed by Carpenter based on grating sensitivities and experience with observations. A signal to noise ratio of 15 is adequate for a reliable radial velocity measured by cross-correlation techniques. In addition we will be able to examine the companion spectra, which have not been observed at high resolution before. As discussed above, we plan to observe at least two standard stars to be used as primary velocity comparisons. To obtain the necessary wavelength accuracy wavelength calibration exposures will have to be taken before and after the stellar observations. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. In order to achieve the highest possible accuracy for the orbital velocity ratio, we need to observe the companions at phases near orbital radial velocity extrema. The orbits are typically a few years. Specific scheduling requests are detailed below. SCHEDULING REQUIREMEBTS FOR CYCLE 4 Y Car Jan.1, 1994 to April 30, 1994 V350 Sgr Jan.15, 1994 to May 1, 1994 U Aql July 1, 1993 to March 30, 1994 S Mus July 15,1994 to Sept. 15, 1994 Generally a window of several months is available, which should assure that spacekraft constraints will not preclude our orbital requirements. Highest accuracy will be achieved in the middle of the windows. We stress that the selected intervals are set by orbital mechanics. WE THEREFORE ASK THAT THE OBSERVATION OF U AQL BE SHIFTED TO CYCLE 3 IF DUE TO THE REPAIR MISSION OBSERVATIONS CAN OTHERWISE NOT BE DONE BEFORE APRIL 1994. (Not enough time was alotted for Cycle 3 to have these observations scheduled in Cycle 3. In order to obtain an accuracy in the mass determination of 10% we require a velocity accuracy of 2 km/sec. In order to obtain this accuracy, a wavelength calibration is required before and after each stellar exposure and a breakup of the long exposures into a series of short exposures to avoid geomagnetic smearing. These will then be aligned by cross-correlation and co- added. Page 4 ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. In order to obtain an accuracy in the mass determination of +/-10% (which we consider necessary for a significant result), we require a velocity accuracy of 2 km/sec. This corresponds to a wavelength accuracy of 0.2 diode or better with the G200M grating. We believe that this can be obtained because of the results of Carpenter et al. (May 1991,HST Workshop) on the emission line spectrum of alpha Tau. In order to obtain this accuracy a wavelength calibration is required before and after each stellar exposure. In addition we intend to break the long exposures up into a series of short exposures to avoid geomagnetic smearing. These will then be aligned by cross-correlation and co-added. By the combination of the spectra and the wavelength calibrations the necessary wavelength accuracy should be possible especially now, when the small aperture can be used after the repair mission. We need to reobserve the two standard stars with known and constant radial velocities and with nearly the same spectral types as the program stars in order to determine the Cepheid companion velocities by cross-correlating the companion spectra with the standard star spectra. Because of the time constraint these observations have to be postponed to cycle 5. The cross- correlation of the spectra of the same standard star will assure us that we measure the same radial velocities for these stars. This will be especially important after the repair mission. ------------------------------------------------------------------------------------ 8. Additional comments or special requests. If, due to the repair mission, it is unlikely that U Aql can be observed in Cycle 4 before April 1 1994, we ask that this star be observed during Cycle 3. This program was accepted during Cycle 3 with high priority. The alotted time of 5 hours for Cycle 3 was apparently based on a timely repair mission and did not allow us to schedule the U Aql observation in Cycle 3. We therefore ask now to make this observation before the repair mission if otherwise it cannot be done in the observing window which is determined by the orbital mechanics of the U Aql system. The next chance for observations at the same orbital phase will only be 5 years later. We will lose at least a factor of 2 in accuracy if we can observe only one extremum of the orbital radial velocity. ------------------------------------------------------------------------------------ 9. Description of previous HST work. This proposal was accepted for Cycle 3. So far we got observations for Y Car but not yet observations for the standard stars. I under- stand that these observations were scheduled for the beginning of October, but may be moved to a later time. So far we have only seen that the spectra of Y Car look OK. As soon as we have the standard star spectra we can measure the radial velocities and get a preliminary result for the radial velocity and the mass of this beat Cepheid. If the mass turns out to be around 4 solar masses this will be a strong argument in favor of the higher, Livermore opacities. Only for the higher opacities are the measured period ratios obtained for a 4 solar mass star. The final, more accurate mass determination will only be obtained after we get the second set of observations for this star in spring 1994. For description of previous work of Ken Carpenter see attached page ------------------------------------------------------------------------------------ 11. Address Information Name: ERIKA HR BOHM-VITENSE Category: PI Institution: 3760 Address: ASTR.DEP. FM-20 UNIVERSITY OF WASHINGTON City: SEATTLE State: WA Zip Code: 98195 Country: USA Telephone: 206 543 4858 Telex (or e-mail): 206 685 0403 ------------------------------------------------------------------------------------ Page 5 Name: ERIKA HR BOHM-VITENSE Category: PI Institution: 3760 Address: ASTRONOMY DEPARTMENT FM-20 UNIVERSITY OF WASHINGTON City: SEATTLE State: WA Zip Code: 98195 Country: U.S.A. Telephone: (206) 543 4858 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 5357 [ 6] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial |Acqui|FLX| Flux data No | Name | Description | Position |Eqnx | Vel. |Prblm|REF| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 1 HD106111 A,147,175,178, RA= 12H 12M 47.23S +/-0.5", 2000 V=11.0 1 V=8.9+/-1, TYPE=B5V HR4645 S-MUS 134,111 DEC= -70D 09' 6.0" +/-1.0", 1 B-V=0.07+/-0.1 -B PLATE-ID=05ZX 2 E(B-V)=0.24+/-0.04 3 F-CONT(1722)=3.2+/-0.2E-12 Comments: WE OBSERVE THE B5V COMPANION OF THE F8II CEPHEID S-MUS THE CEPHEID MWGNITUDE IS 6.7+/-1 FOR THE CEPHEID B-V=0.5+/-0.1 Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J 1987.00 -0.0020 +/- 0.0001 -0.0200 +/- 0.0100 0.0020 +/- 0.0010 ------------------------------------------------------------------------------------------------------------------------------------ 2 HD66591- A,111 RA= 08H 00M 20.00S +/- 1.0", 2000 V=22.0 1 V=4.82+/-0.02, TYPE=B3V CALIB HR3159 DEC= -63D 34' 03.2" +/- 1 B-V=-0.17+/-0.02 1.0", 2 E(B-V)=0.0 PLATE-ID=00MQ 3 F-CONT(1722)=5.0E-10 Comments: THIS IS A VELOCITY CALIBRATION STAR FOR THE OBSERVATIONS OF S-MUS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J 1980.00 0.0010 +/- 0.0000 0.0200 +/- 0.0100 0.0040 +/- 0.0010 ------------------------------------------------------------------------------------------------------------------------------------ 3 HD91595 Y- A,147,175,178,134, RA= 10H 33M 10.90S +/- 1.0", 2000 V=-14.1 1 V=11.9+/-1 CAR-B 112 DEC= -58D 29' 55.7" +/- 1 B-V=0.09+/-0.05 1.0", 2 E(B-V)=0.08+/-0.05 PLATE-ID=06A6 3 F-CONT(1860)=1.0E-13 Comments: WE WANT TO OBSERVE THE B9V COMPANION OF THE CEPHEID Y CAR THE CEPHEID HAS V=7.5+/- 1 Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J 1987.00 0.0011 +/- 0.0005 0.0000 +/- 0.0010 0.0010 +/- 0.0010 ------------------------------------------------------------------------------------------------------------------------------------ 4 HD172167- A,123 RA= 18H 36M 56.3S +/-0.1S, 2000.00 V=-14.0 1 V=0.02+/-0.02, TYPE=A0V CALIB HR7001 DEC= +38D 47' 01" +/-1" 1 B-V=0.01 ALPHA-LYRAE 2 E(B-V)=0.0 3 F-CONT(1860)=5.5E-9 Comments: THIS IS A CALIBRATION STAR TO MEASURE THE RADIAL VELOCITY OF Y-CAR-B Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J 2000.00 0.0171 +/- 0.0006 0.2900 +/- 0.0300 0.1200 +/- 0.0100 ------------------------------------------------------------------------------------------------------------------------------------ 5 HD183344 A,147,175,134, RA= 19H 29M 21.37S +/-1.0", 2000 V=-6.0 1 V=10.8+/-1 HR7402 U-Aql 123 DEC= -07D 02' 37.7" +/-1.0", 1 B-V=0.34+/-0.05 -B PLATE-ID=03UO 2 E(B-V)=0.35 3 F-CONT(1860)=5.5E-14 Comments: WE WANT TO OBSERVE THE A1V COMPANION OF THE CEPHEID U AQL. THE CEPHEID HAS V=6.5+/ -1 Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J 1982.00 0.0014 +/- 0.0005 0.0030 +/- 0.0010 0.0010 +/- 0.0005 TARGET LIST a) Fixed Targets ID = 5357 [ 7] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial |Acqui|FLX| Flux data No | Name | Description | Position |Eqnx | Vel. |Prblm|REF| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ 6 HD173297 A,147,175,178, RA= 18H 45M 17.53S +/- 1.0", 2000 V=0.0 1 V=11.5+/-1 V350-SGR-B 134,112 DEC= -20D 38' 50.6" +/- 1 B-V=-0.05+/-0.05 1.0", 2 E(B-V)=0.30+/-0.1 PLATE-ID=060A 3 F-CONT(1860)=5.0E-14 Comments: WE WANT TO OBSERVE THE B9V COMPANION OF THE CEPHEID V350 SGR,WHICH HAS V=8.0. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J 1987.00 0.0061 +/- 0.0020 -0.0120 +/- 0.0000 0.0010 +/- 0.0005 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5357 [ 8] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD106111 HRS ACQ 2.0 MIRROR-N2 LOCATE=YES 1 1.8S 1 1 ONBOARD ACQ FOR BRIGHT=RETURN 2.000 SEARCH-SIZE=3 SEQ 1 - 5 NO GAP CYCLE 4/1.-65.5 AT 15-AUG-94+/-30D Comments: USE STEP-TIME = 0.2 SEC. EXPECT ROUGHLY 50000.CTS/0.2S THIS STAR IS SCHEDULED TO BE OBSERVED ALSO IN OCT 93 ------------------------------------------------------------------------------------------------------------------------------------ 2 HD106111 HRS ACQ/ 0.25 MIRROR-N2 SEARCH-SIZE=5 1 10.0S 1 1 SEQ 2-5 NON-INT PEAKUP Comments: STEP-TIME = 0.2 SEC ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE HRS ACCUM SC2 ECH-B 1722.0 STEP-PATT=3 1 30.0S 1 CALIB FOR 4 NO SLEW ------------------------------------------------------------------------------------------------------------------------------------ 4 HD106111 HRS ACCUM 0.25 ECH-B 1722.0 STEP-PATT=7 6 5.0M 15 2 1 FP-SPLIT=NO Comments: S/N IS FOR SUM OF 5 EXP'S. ------------------------------------------------------------------------------------------------------------------------------------ 5 WAVE HRS ACCUM SC2 ECH-B 1722.0 STEP-PATT=3 1 30.0S 1 CALIB FOR 4 NO SLEW ------------------------------------------------------------------------------------------------------------------------------------ 11 HD91595 HRS ACQ 2.0 MIRROR-N2 LOCATE=YES 1 1.8S 1 1 ONBOARD ACQ FOR BRIGHT=RETURN 12.000 SEARCH-SIZE=3 SEQ 11.0-15.8 NO GAP AT 1-MAR-94+/-50D Comments: USE STEP-TIME = 200 MSEC. EXPECT ROUGHLY 2938 CTS/200MS THIS STAR HAS BEEN OBSERVED PREVIOUSLY ------------------------------------------------------------------------------------------------------------------------------------ 12 HD91595 HRS ACQ/ 0.25 MIRROR-N2 SEARCH-SIZE=5 1 10.0S 1 1 SEQ 12-15 NON-INT PEAKUP Comments: STEP-TIME = 200 MSEC ------------------------------------------------------------------------------------------------------------------------------------ 13 WAVE HRS ACCUM SC2 G200M 1860.0 STEP-PATT=3 1 30.0S 1 CALIB FOR 14 NO SLEW ------------------------------------------------------------------------------------------------------------------------------------ 14 HD91595 HRS ACCUM 0.25 G200M 1860.0 STEP-PATT=5 5 5.0M 15 2 1 FP-SPLIT=NO Comments: S/N IS FOR SUM OF 5 EXP'S. ------------------------------------------------------------------------------------------------------------------------------------ 15 WAVE HRS ACCUM SC2 G200M 1860.0 STEP-PATT=3 1 30.0S 1 CALIB FOR 14 NO SLEW ------------------------------------------------------------------------------------------------------------------------------------ 15.5 WAVE HRS ACCUM SC2 G200M 1860.0 STEP-PATT=3 1 30.0S 1 CALIB FOR 15.6 NO SLEW SEQ 15.5-15.8 NON- INT ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5357 [ 9] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 15.6 HD91595 HRS ACCUM 0.25 G200M 1860.0 STEP-PATT=5 5 5.0M 15 2 1 FP-SPLIT=NO Comments: S/N IS FOR SUM OF 5 EXP'S. ------------------------------------------------------------------------------------------------------------------------------------ 15.8 WAVE HRS ACCUM SC2 G200M 1860.0 STEP-PATT=3 1 30.0S 1 CALIB FOR 15.6 NO SLEW ------------------------------------------------------------------------------------------------------------------------------------ 50 HD183344 HRS ACQ 2.0 MIRROR-N2 LOCATE=YES 1 1.8S 1 1 ONBOARD ACQ FOR 52 BRIGHT=RETURN -55.2 SEARCH-SIZE=3 SEQ 50-55.2 NO GAP AT 11-DEC-93+/- 120D Comments: USE STEP-TIME = 0.20 SEC. EXPECT ROUGHLY 50000.CTS/0.2S ------------------------------------------------------------------------------------------------------------------------------------ 51 HD183344 HRS ACQ/ 0.25 MIRROR-N2 SEARCH-SIZE=5 1 10.0S 1 1 ONBOARD ACQ FOR PEAKUP 52.000-55.200 SEQ 52.00-53.20 NON-INT Comments: STEP-TIME = 200 MSEC ------------------------------------------------------------------------------------------------------------------------------------ 52 WAVE HRS ACCUM SC2 G200M 1860.0 STEP-PATT=3 1 30.0S 1 CALIB FOR 53.0 NO SLEW ------------------------------------------------------------------------------------------------------------------------------------ 53 HD183344 HRS ACCUM 0.25 G200M 1860.0 STEP-PATT=5 2 15.5M 15 2 1 FP-SPLIT=STD Comments: S/N IS FOR SUM OF 4 EXP'S ------------------------------------------------------------------------------------------------------------------------------------ 53.2 WAVE HRS ACCUM SC2 G200M 1860.0 STEP-PATT=3 1 30.0S 1 CALIB FOR 53.0 NO SLEW ------------------------------------------------------------------------------------------------------------------------------------ 54.8 WAVE HRS ACCUM SC2 G200M 1860.0 STEP-PATT=3 1 30.0S 1 CALIB FOR 55.000 NO SLEW SEQ 54.8-55.2 NON- INT ------------------------------------------------------------------------------------------------------------------------------------ 55 HD183344 HRS ACCUM 0.25 G200M 1860.0 STEP-PATT=5 2 15.5M 15 2 1 FP-SPLIT=STD Comments: S/N IS FOR SUM OF 4 EXP'S. ------------------------------------------------------------------------------------------------------------------------------------ 55.2 WAVE HRS ACCUM SC2 G200M 1860.0 STEP-PATT=3 1 30.0S 1 CALIB FOR 55.0 NO SLEW ------------------------------------------------------------------------------------------------------------------------------------ 60 HD173297 HRS ACQ 2.0 MIRROR-N2 LOCATE=YES 1 1.8S 1 1 ONBOARD ACQ FOR BRIGHT=RETURN 63.000 SEARCH-SIZE=3 SEQ 60.0-65.5 NO GAP AT 1-MAR-94+/-60D ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5357 [ 10] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 61 HD173297 HRS ACQ/ 0.25 MIRROR-N2 SEARCH-SIZE=5 1 10.0S 1 1 ONBOARD ACQ FOR PEAKUP 62.0-64.0 SEQ 62.0-64.0 NON- INT Comments: STEP-TIME = 200 MSEC ------------------------------------------------------------------------------------------------------------------------------------ 62 WAVE HRS ACCUM SC2 G200M 1860.0 STEP-PATT=3 1 30.0S 1 CALIB FOR 63.0 NO SLEW ------------------------------------------------------------------------------------------------------------------------------------ 63 HD173297 HRS ACCUM 0.25 G200M 1860.0 STEP-PATT=5 2 15.5M 15 2 1 FP-SPLIT=STD Comments: S/N IS FOR SUM OF 4 EXP'S ------------------------------------------------------------------------------------------------------------------------------------ 64 WAVE HRS ACCUM SC2 G200M 1860.0 STEP-PATT=3 1 30.0S 1 CALIB FOR 63.0 NO SLEW ------------------------------------------------------------------------------------------------------------------------------------ 64.8 WAVE HRS ACCUM SC2 G200M 1860.0 STEP-PATT=3 1 30.0S 1 CALIB FOR 65.000 NO SLEW SEQ 64.8-65.5 NON- INT ------------------------------------------------------------------------------------------------------------------------------------ 65 HD173297 HRS ACCUM 0.25 G200M 1860.0 STEP-PATT=5 2 15.5M 15 2 1 FP-SPLIT=STD Comments: S/N IS FOR SUM OF 4 EXP'S ------------------------------------------------------------------------------------------------------------------------------------ 65.5 WAVE HRS ACCUM SC2 G200M 1860.0 STEP-PATT=3 1 30.0S 1 CALIB FOR 65.00 NO SLEW ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5357 [ 11] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations HRS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ ACQ/PEAKUP ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters LOCATE=YES BRIGHT=RETURN SEARCH-SIZE=3 SEARCH-SIZE=5 STEP-PATT=3 STEP-PATT=7 FP-SPLIT=NO STEP-PATT=5 FP-SPLIT=STD ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 11.99 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category COOL STARS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category PULSATING STARS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 2.000; SEQ 1 - 5 NO GAP; CYCLE 4/1.-65.5; AT 15-AUG-94+/-30D SEQ 2-5 NON-INT; CALIB FOR 4 NO SLEW; CALIB FOR 4 NO SLEW ONBOARD ACQ FOR 12.000; SEQ 11.0-15.8 NO GAP; AT 1-MAR-94+/-50D SEQ 12-15 NON-INT; CALIB FOR 14 NO SLEW; CALIB FOR 15.6 NO SLEW; SEQ 15.5-15.8 NON-INT; CALIB FOR 15.6 NO SLEW ONBOARD ACQ FOR 52-55.2; SEQ 50-55.2 NO GAP; AT 11-DEC-93+/-120D ONBOARD ACQ FOR 52.000-55.200; SEQ 52.00-53.20 NON-INT; CALIB FOR 53.0 NO SLEW CALIB FOR 53.0 NO SLEW; CALIB FOR 55.000 NO SLEW; SEQ 54.8-55.2 NON-INT CALIB FOR 55.0 NO SLEW ONBOARD ACQ FOR 63.000; SEQ 60.0-65.5 NO GAP; AT 1-MAR-94+/-60D ONBOARD ACQ FOR 62.0-64.0; SEQ 62.0-64.0 NON-INT; CALIB FOR 63.0 NO SLEW; CALIB FOR 63.0 NO SLEW; CALIB FOR 65.000 NO SLEW; SEQ 64.8-65.5 NON-INT CALIB FOR 65.00 NO SLEW ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR-N2 ECH-B G200M ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD106111 HR4645 S-MUS-B HD66591-CALIB HR3159 HD91595 Y-CAR-B HD172167-CALIB HR7001 ALPHA-LYRAE HD183344 HR7402 U-Aql-B HD173297 V350-SGR-B ------------------------------------------------------------------------------------------------------------------------------------