6255( 21) - 12/07/95 10:39 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6255 Version: 21 Check-in Date: ********** 1.Proposal Title: Long-Slit Spectroscopy of the Center of M31 ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle Stellar Populations GTO/OS 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Ivan R. King University of California, Berkeley CoI: Philippe Crane European Southern Observatory N CoI: Thomas S. Statler University of North Carolina N ------------------------------------------------------------------------------------ 6. Abstract Spectra from 3600-5400A will be taken with the FOC long-slit spectrograph laid across the two central brightness peaks of M31, to study the rotational velocity and the velocity dispersion as a function of position. The central arcsec will be well enough exposed to yield good-S/N spectra that are only 1 pixel (28 mas) high; farther out, successive rows will be averaged. The aim is to get a high-spatial- resolution rotation curve and also to get velocity dispersion as a function of position. Parallel WFPC2 exposures will yield population information at the edge of the bulge. ------------------------------------------------------------------------------------ 6255( 21) - 12/07/95 10:39 - [ 2] Observations Description ------------------------ The first two orbits are for acquisition, with an uplink of a positional correction at the end of each. The next 7 orbits are used to accumulate enough counts for a good S/N. The parallel exposures are for colors and magnitudes of the faint blue stars that are responsible for the UV upturn. The required orientation is nominal around November 26. (The orientation 180D away can be reached only during the SAZ.) Note also the request that the parallels be lengthened by hand if the primaries are expanded (since RPS2 will not accept EXPAND on parallels). Note that no parallels are included in the last two orbits since they will not schedule then and thus prevent the primaries from scheduling if the parallels are included. Real Time Justification ----------------------- An acquisition orbit is needed to position the slit exactly right. Calibration Justification ------------------------- N. A. Additional Comments ------------------- The whole program can be taken on a single GSACQ. It can be scheduled only in late November. Parallels are commented out pending availability of an RPS2 that can process them. This is an FOC/48 program and will run only if that mode proves viable. The PC know that this is a 9-orbit visit and believes it is OK. See visit-level comment. ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: Robert Jedrzejewski*STSCI Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 6255( 21) - 12/07/95 10:39 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC224 GALAXY,SPIRAL,NUCLEUS RA=00H 42M 44.5S +/- 0.1S, 2000.0 V=3.7 DEC=+41D 16' 09" +/- 1" B-V=0.9 6255( 21) - 12/07/95 10:39 - [ 4] Visit: 01 Visit Requirements: ORIENT 98.99D TO 99.01D On Hold Comments: Additional Comments: This ORIENT is nominal for solar-panel orientation around November 26. The PC believes that this 9-orbit visit is OK. If it is not, we will drop one orbit and lengthen another program by one orbit. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC224 FOC/48 ACQ 512X102 F342W,F19 PIXEL=50X25 1 900S INT ACQ FOR 4 4 5W Comments: Please reduce the decision time to the minimum in order allow for execution of first slit exposures in this orbit. ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC224 FOC/48 SPEC 512X102 GRATING,F PIXEL=50X25 1 300S RT ANALYSIS POS TARG -0.2,0.0 4-SLIT 305LP ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC224 FOC/48 SPEC 512X102 GRATING,F PIXEL=50X25 1 300S RT ANALYSIS POS TARG -0.1,0.0 4-SLIT 305LP ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC224 FOC/48 SPEC 512X102 GRATING,F PIXEL=50X25 1 300S RT ANALYSIS POS TARG 0.0,0.0 4-SLIT 305LP ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC224 FOC/48 SPEC 512X102 GRATING,F PIXEL=50X25 1 300S RT ANALYSIS POS TARG 0.1,0.0 4-SLIT 305LP ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC224 FOC/48 SPEC 512X102 GRATING,F PIXEL=50X25 1 300S RT ANALYSIS POS TARG 0.2,0.0 4-SLIT 305LP ------------------------------------------------------------------------------------------------------------------------------------ 9 INTFLAT FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25,LED 1 600S 4 =GREEN-2,LED- STEP=32 ------------------------------------------------------------------------------------------------------------------------------------ 10 DARK FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25 1 600S 4 Comments: This DARK has been cut to 600s for purposes of schedulability. ------------------------------------------------------------------------------------------------------------------------------------ 11 NGC224 FOC/48 SPEC 512X102 GRATING,F PIXEL=50X25 1 2736S EXPAND MIN DUR 2100S MAX DUR 2736S REQ 4-SLIT 305LP UPLINK END ORBIT Comments: Please expand WFPC2 parallels to match expanded FOC primes. The expanded primary FOC exposure is 2736s. ------------------------------------------------------------------------------------------------------------------------------------ 12 NGC224 WFPC2 IMAGE WFALL F300W CR-SPLIT=0.5 CR 1 2600S PAR WITH 11 -TOLERANCE=0.0 ATD-GAIN=7 Comments: Exp Time has been matched by hand to FOC prime. Note that 2600s used instead of 2700s since 2x50s is lost anyway by rounding down to legal WFPC2 exposure times after CR-SPLIT, so 2600s reflects the true value either way. ------------------------------------------------------------------------------------------------------------------------------------ 6255( 21) - 12/07/95 10:39 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 13 INTFLAT FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25,LED 1 600S 4 =GREEN-2,LED- STEP=32 ------------------------------------------------------------------------------------------------------------------------------------ 14 DARK FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25 1 900S 4 ------------------------------------------------------------------------------------------------------------------------------------ 15 NGC224 FOC/48 SPEC 512X102 GRATING,F PIXEL=50X25 1 2736S SAME POS AS 11 EXPAND MIN DUR 2700S MAX DUR 4-SLIT 305LP 2736S END ORBIT Comments: Please expand WFPC2 parallels to match expanded FOC primes. The expanded primary FOC exposure is 2736s. ------------------------------------------------------------------------------------------------------------------------------------ 16 NGC224 WFPC2 IMAGE WFALL F170W CR-SPLIT=NO ATD 1 2700S PAR WITH 15 -GAIN=7 Comments: Exp Time has been matched by hand to FOC prime. ------------------------------------------------------------------------------------------------------------------------------------ 17 INTFLAT FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25,LED 1 600S 4 =GREEN-2,LED- STEP=32 ------------------------------------------------------------------------------------------------------------------------------------ 18 DARK FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25 1 900S 4 ------------------------------------------------------------------------------------------------------------------------------------ 19 NGC224 FOC/48 SPEC 512X102 GRATING,F PIXEL=50X25 1 2736S SAME POS AS 11 EXPAND MIN DUR 2700S MAX DUR 4-SLIT 305LP 2736S END ORBIT Comments: Please expand WFPC2 parallels to match expanded FOC primes. The expanded primary FOC exposure is 2736s. ------------------------------------------------------------------------------------------------------------------------------------ 20 NGC224 WFPC2 IMAGE WFALL F170W CR-SPLIT = NO 1 2700S PAR WITH 19 ATD-GAIN=7 Comments: Exp Time has been matched by hand to FOC prime. ------------------------------------------------------------------------------------------------------------------------------------ 21 INTFLAT FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25,LED 1 600S 4 =GREEN-2,LED- STEP=32 ------------------------------------------------------------------------------------------------------------------------------------ 22 DARK FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25 1 900S 4 ------------------------------------------------------------------------------------------------------------------------------------ 23 NGC224 FOC/48 SPEC 512X102 GRATING,F PIXEL=50X25 1 2736S SAME POS AS 11 EXPAND MIN DUR 2700S MAX DUR 4-SLIT 305LP 2736S END ORBIT Comments: Please expand WFPC2 parallels to match expanded FOC primes. The expanded primary FOC exposure is 2736s. ------------------------------------------------------------------------------------------------------------------------------------ 6255( 21) - 12/07/95 10:39 - [ 6] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 24 NGC224 WFPC2 IMAGE WFALL F170W CR-SPLIT = NO 1 2700S PAR WITH 23 ATD-GAIN=7 Comments: Exp Time has been matched by hand to FOC prime. ------------------------------------------------------------------------------------------------------------------------------------ 25 INTFLAT FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25,LED 1 600S 4 =GREEN-2,LED- STEP=32 ------------------------------------------------------------------------------------------------------------------------------------ 26 DARK FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25 1 900S 4 ------------------------------------------------------------------------------------------------------------------------------------ 27 NGC224 FOC/48 SPEC 512X102 GRATING,F PIXEL=50X25 1 2736S SAME POS AS 11 EXPAND MIN DUR 2700S MAX DUR 4-SLIT 305LP 2736S END ORBIT Comments: Please expand WFPC2 parallels to match expanded FOC primes. The expanded primary FOC exposure is 2736s. ------------------------------------------------------------------------------------------------------------------------------------ 28 NGC224 WFPC2 IMAGE WFALL F170W CR-SPLIT = NO 1 2700S PAR WITH 27 ATD-GAIN=7 Comments: Exp Time has been matched by hand to FOC prime. ------------------------------------------------------------------------------------------------------------------------------------ 29 INTFLAT FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25,LED 1 600S 4 =GREEN-2,LED- STEP=32 ------------------------------------------------------------------------------------------------------------------------------------ 30 DARK FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25 1 600S 4 Comments: This DARK was cut to 600s for scheduling purposes. ------------------------------------------------------------------------------------------------------------------------------------ 31 NGC224 FOC/48 SPEC 512X102 GRATING,F PIXEL=50X25 1 2748S SAME POS AS 11 EXPAND MIN DUR 2700S MAX DUR 4-SLIT 305LP 2748S Comments: The expanded primary FOC exposure is 2748s. There is no WFPC2 parallel exposure with this FOC primary due to scheduling constraints. ------------------------------------------------------------------------------------------------------------------------------------ 32 INTFLAT FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25,LED 1 600S 4 =GREEN-2,LED- STEP=32 ------------------------------------------------------------------------------------------------------------------------------------ 33 DARK FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25 1 480S 4 Comments: This dark was cut to 480s for scheduling purposes. ------------------------------------------------------------------------------------------------------------------------------------ 6255( 21) - 12/07/95 10:39 - [ 7] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 34 NGC224 FOC/48 SPEC 512X102 GRATING,F PIXEL=50X25 1 2688S SAME POS AS 11 EXPAND MAX DUR 2688S 4-SLIT 305LP Comments: The primary FOC exposure was cut to 2688s for scheduling purposes. There is no WFPC2 parallel exposure with this FOC prime due to scheduling constraints. ------------------------------------------------------------------------------------------------------------------------------------ 35 INTFLAT FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25,LED 1 600S 4 =GREEN-2,LED- STEP=32 ------------------------------------------------------------------------------------------------------------------------------------ 36 DARK FOC/48 RESEAU 512X102 CLEAR PIXEL=50X25 1 900S 4 ------------------------------------------------------------------------------------------------------------------------------------ 6255( 21) - 12/07/95 10:39 - [ 8] Summary Form for Proposal 6255 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOC/48 WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ SPEC RESEAU IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters PIXEL=50X25 LED-STEP=32 CR-SPLIT=0.5 CR-TOLERANCE=0.0 ATD-GAIN=7 LED=GREEN-2 CR-SPLIT=NO ATD-GAIN=7 CR-SPLIT = NO ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GTO/OS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category Stellar Populations ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 98.99D TO 99.01D INT ACQ FOR 4 RT ANALYSIS POS TARG -0.2,0.0 RT ANALYSIS POS TARG -0.1,0.0 RT ANALYSIS POS TARG 0.0,0.0 RT ANALYSIS POS TARG 0.1,0.0 RT ANALYSIS POS TARG 0.2,0.0 EXPAND MIN DUR 2100S MAX DUR 2736S REQ UPLINK END ORBIT PAR WITH 11 SAME POS AS 11 EXPAND MIN DUR 2700S MAX DUR 2736S END ORBIT PAR WITH 15 PAR WITH 19 PAR WITH 23 PAR WITH 27 SAME POS AS 11 EXPAND MIN DUR 2700S MAX DUR 2748S SAME POS AS 11 EXPAND MAX DUR 2688S ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F342W,F195W GRATING,F305LP CLEAR F300W F170W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC224 INTFLAT DARK ------------------------------------------------------------------------------------------------------------------------------------