6017( 28) - 06/25/96 10:18 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6017 Version: 28 Check-in Date: 25-Jun-1996 10:12:32 1.Proposal Title: SOFT X-RAY TRANSIENTS: OUTBURSTS IN BLACK HOLE ACCRETION DISKS ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle Hot Stars GO 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: CAROLE HASWELL COLUMBIA UNIVERSITY CoI: Keith Horne University of Utrecht N CoI: Chris Shrader NASA Goddard Space Flight Center N CoI: Fuhua Cheng University of Maryland N CoI: Mario Livio STScI N CoI: Mark Wagner Ohio State University (Lowell) N CoI: Wan Chen NASA Goddard Space Flight Center N ------------------------------------------------------------------------------------ 6. Abstract UV observations of soft X-ray transients (SXTs) will be made using the FOS. This is part of an extensive multiwavelength target of opportunity campaign to monitor newly discovered SXTs in outburst and throughout the subsequent decline. Recent work establishes that a high proportion of SXTs harbor black holes, so these observations provide an unrivalled opportunity to obtain high quality data from an accreting black hole. UV data is a keystone of our multiwavelength campaign because the disk regions of interest radiate predominantly in the UV. Emission lines will allow us to probe the kinematics of the inner disk region. We will determine the relative strengths of the reprocessed X-ray flux emitted in the UV, and the UV flux generated by viscous heating in the accretion flow. Multiwavelength observations will probe the physics of the accretion flow throughout the outburst. The observations will yield a detailed quantitative test of the thermal disk instability model for SXT outbursts. FOS work on Nova Muscae 1991 demonstrated the critical importance to this test of recording the UV and optical spectrum during the decline. The unique FOS/G160L capability for simultaneous 1100 -2500A spectra and optical photometry with 2s time resolution will be exploited: an echo-mapping experiment will measure the size of the reprocessing regions in the accretion disk, and thus probe morphology changes as the decline proceeds. ------------------------------------------------------------------------------------ 6017( 28) - 06/25/96 10:18 - [ 2] Observations Description ------------------------ We plan a total of 8 visits to the target throughout the decline from outburst. Since we do not yet know the coordinates of the target, we assume the average visibility window of 56 minutes, and use the standard ACQ/PEAK acquisition. (ACQ/BINARY is not suitable for such a variable target.) To calculate exposure times we assume a typical SXT lightcurve and reddening, and demand at least 100 counts Angstrom ^-1 at the center of the spectrum, with a minimum 5 minutes exposure time. The G160L exposures in the first five visits were fixed at 20m to give the longest possible 2s resolution data stream. Extra minutes were added or subtracted as necessary to pack the orbits; these small adjustments will vary with the visibility window. On the first five visits, while the SXT is bright, the following high resolution modes: Blue/G130H, Blue/G190H, Red/G270H, Red/G400H, will obtain spectral coverage from 1100A to 4800A. We will operate in RAPID mode, with READ-TIME=6.18s. This allows us to monitor short timescale variability. Additionally, we will use FOS/BLUE/G160L to record simultaneous white light photometry (with order 0) and low spectral resolution UV spectroscopy (with order 1) at the maximum possible time resolution. On the last three visits we utilize lower resolution configurations (G160L, Prism) to obtain similar spectral coverage without costly long exposures. The following table summarises our program: beginverbatim FOS t V blue blue red red blue red orbits visit (days) mag G130H G190H G270H G400H G160L prism 1 0 13 5m 5m 6m 5m 20m 3 2 10 13.27 5m 5m 6m 5m 20m 3 3 20 13.54 5m 5m 6m 5m 20m 3 4 30 13.18 5m 5m 6m 5m 20m 3 5 60 14.63 8m 5m 6m 5m 17m 3 6 90 15.44 18m 18m 18m 3 7 120 16.25 18m 18m 18m 3 8 150 17.08 93m 18m 4 endverbatim Improvements in HST operations which may be available by phase 2 of cycle 5 may potentially produce significant improvements in the efficiency of our target acquisitions (Tony Keyes 3 Aug 1994). Therefore we would prefer any cuts to our program be specified in terms of orbits rather than visits. In this case we will have more flexibility to plan for maximum scientific return once all the observational and technical parameters are known. We emphasise that in the case that the efficiency does improve, we would still be able to make excellent use of the full request: the signal-to-noise ratio of our data and duration of coverage would be enhanced, hence allowing us to better pursue our goals. Real Time Justification ----------------------- The recurrence times of an individual sources vary greatly, and are unpredictable, hence we require Target of Opportunity Observations. There is a significant likelihood of a major transient event occurring during the 1-year duration of this proposal. Over the last 6 years four major events occurred. Prompt observations, within a week of discovery if possible, are desirable. If we miss the first weeks of the decay, we may fail to unequivocally test the disk instability model. As the source fades, data quality will decline; early observations hold the most potential for ground-breaking discoveries. We have in place IUE and Compton Gamma Ray Observatory target of opportunity programs to observe SXTs. GRO will provide early detection, and subsequently monitor the hard X-ray intensity. Hence, ``real time'' planning of observations at other wavelengths is facilitated. At Lowell observatory we have immediate access to high quality ground-based observations. The IUE program takes advantage of the scheduling flexibility and user-interactive nature of that facility. We will use it to make preliminary observations, assessing the feasibility and scientific interest in pursuing further study. The early IUE observations will be crucial in our decision whether or not to request activation of this proposal; subsequent IUE observations will support fine- tuning of our HST program. We will trigger the HST program if a major SXT, reaching ~ 1 Crab and/or V ~ 14, occurs. HST is needed for several reasons. By using the RAPID mode of the FOS, we will obtain higher time resolution than is possible with IUE, so we can monitor the expected rapid variations in emission from an accreting black hole. The echo-mapping observations we propose depend on this HST capability, as well as the unique ability to obtain simultaneous UV spectra and optical photometry. The IUE instruments have limited dynamic range and our observations require HST's superior sensitivity and resolution. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 6017( 28) - 06/25/96 10:18 - [ 3] Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS OVERNIGHT Email: , ------------------------------------------------------------------------------------ 6017( 28) - 06/25/96 10:18 - [ 4] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 J1655-40 STAR,INTERACTING RA=16H 54M .14S +/- 0.015S,DEC=- J2000 V = 13+/-1 BINARY,X-RAY NOVAE,X- 39D 50' 44.90" +/- 0.2",PLATE- B-V = -0.6 RAY TRANSIENT,LMXB, ID=06Q2 Comments: Target is VARIABLE. Posn from Bailyn et al Nature 374. RE-outbursting SXT will be followed through decline. Source observed with XTE at 3 Crabs on 9 May 1996. Probably highly reddened E(B-V)=1. Assume V=13 at 9 May 1996. We assume Fnu=nu**1/3 spectrum V=13+(TIME/18days), E(B-V)=1.0 for logsheet calcs. 6017( 28) - 06/25/96 10:18 - [ 5] Visit: 01 Visit Requirements: BETWEEN 10-May-1996 AND 17-May-1996 SCHED 100% ON HOLD ORIENT 340.5D TO 340.5D On Hold Comments: This is a target of opportunity. Coordinates, fluxes, and timing information are unknown until newly outbursting SXT triggers the program. Additional Comments: Orientation as far as possible from nominal to enable REUSE TARGET OFFSET in subsequent visits. May Sun angle ~140 degrees => 26 degree offset from nominal & REUSE SAME guide stars for ~50 days. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 J1655-40 FOS/BL ACQ/PEA 4.3 MIRROR SEARCH-SIZE-X=1,SEARCH-SIZE-Y=3, 1 2.35 S ONBOARD ACQ FOR 2 NO K SCAN-STEP-Y=1.204 SPLIT Comments: 1st stage acq/peak. Exposure time for FOS/RD 0.56S. Order of FOS sides unimportant, but FOS/BL ACQ gives lower countrates, safer. Exposure Times for 10,000 counts. ------------------------------------------------------------------------------------------------------------------------------------ 2 J1655-40 FOS/BL ACQ/PEA 1.0-PAI MIRROR SCAN-STEP-X=0.602, 1 2.35 S ONBOARD ACQ FOR 3 NO K R-A SCAN-STEP-Y=0.602,SEARCH-SIZE-X=6 SPLIT ,SEARCH-SIZE-Y=2 Comments: 2nd stage acq/peak. Exposure time for FOS/RD 0.56S. FOS/BLU should be well under brightness limit unless target brightens. ------------------------------------------------------------------------------------------------------------------------------------ 3 J1655-40 FOS/BL ACQ/PEA 0.25-PA MIRROR SCAN-STEP-X=0.17,SCAN-STEP-Y=0.17 1 2.50 S ONBOARD ACQ FOR 4 NO K IR-A ,SEARCH-SIZE-X=5,SEARCH-SIZE-Y=5 SPLIT SAVE OFFSET ONE Comments: 3rd stage acq/peak. Exposure time for FOS/RD 0.56S. Optimise this pattern to make best use of the remaining target visibility? ------------------------------------------------------------------------------------------------------------------------------------ 4 J1655-40 FOS/BL RAPID 1.0-PAI G190H READ-TIME=6.18 1 475.86 NO SPLIT R-A Comments: No Split just to force target acquisition orbit to remain free of grating change overhead, for planning purposes. ------------------------------------------------------------------------------------------------------------------------------------ 5 J1655-40 FOS/BL RAPID 1.0-PAI G160L READ-TIME=3.70,SUB-STEP=2 1 1901.80 NO SPLIT R-A Comments: drop to SUB-STEP=2 for short read-time at low telemetry rate ------------------------------------------------------------------------------------------------------------------------------------ 6 J1655-40 FOS/BL RAPID 1.0-PAI PRISM READ-TIME=6.18 1 364.62 NO SPLIT R-A ------------------------------------------------------------------------------------------------------------------------------------ 7 J1655-40 FOS/BL RAPID 1.0-PAI G160L READ-TIME=3.70,SUB-STEP=2 1 2220.00 NO SPLIT EXPAND R-A Comments: drop to SUB-STEP=2 for short read-time at low telemetry rate ------------------------------------------------------------------------------------------------------------------------------------ 6017( 28) - 06/25/96 10:18 - [ 6] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 8 J1655-40 FOS/BL RAPID 1.0-PAI G160L READ-TIME=2.0 1 17.5 M MAX DUR 17.5 M NO SPLIT R-A Comments: THIS IS THE MOST IMPORTANT EXPOSURE. For the echo-mapping experiment. Need the high telemetry rate, and onboard tape recorder. Only space for 17.5M of data on the tape recorder ( CAL/FOS 124) ------------------------------------------------------------------------------------------------------------------------------------ 9 J1655-40 FOS/BL RAPID 1.0-PAI G160L READ-TIME=3.70,SUB-STEP=2 1 543.90 NO SPLIT R-A Comments: drop to SUB-STEP=2 for short read-time at low telemetry rate ------------------------------------------------------------------------------------------------------------------------------------ 10 J1655-40 FOS/BL RAPID 1.0-PAI PRISM READ-TIME=6.18 1 401.7 S NO SPLIT R-A Comments: side change after BLUE exposures ------------------------------------------------------------------------------------------------------------------------------------ 13 J1655-40 FOS/RD RAPID 1.0-PAI G270H READ-TIME=6.18 1 896.10 EXPAND R-A Comments: Detailed observing plan optimised to 1655-40 visit 1 ------------------------------------------------------------------------------------------------------------------------------------ 14 J1655-40 FOS/RD RAPID 1.0-PAI G400H READ-TIME=6.18 1 494.40 R-A ------------------------------------------------------------------------------------------------------------------------------------ 15 J1655-40 FOS/RD RAPID 1.0-PAI PRISM READ-TIME=6.18 1 426.42 R-A ------------------------------------------------------------------------------------------------------------------------------------ 6017( 28) - 06/25/96 10:18 - [ 7] Visit: 02 Visit Requirements: AFTER 01 BY 2 D TO 8 D SCHED 100% ORIENT 340.5D TO 340.5D On Hold Comments: Additional Comments: Reuse same guide stars as Visit 1. Check posn with 5x5 ACQ/PEAK. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 3 J1655-40 FOS/BL ACQ/PEA 0.25-PA MIRROR SCAN-STEP-X=0.17,SCAN-STEP-Y=0.17 1 5 S ONBOARD ACQ FOR 4 NO K IR-A ,SEARCH-SIZE-X=5,SEARCH-SIZE-Y=5 SPLIT USE OFFSET ONE Comments: acq/peak to check position after reacquiring Visit 1's guide stars. FOS/RD exp time 0.56s. Exposures calculated for 10,000 counts. ------------------------------------------------------------------------------------------------------------------------------------ 4 J1655-40 FOS/BL RAPID 4.3 G190H READ-TIME=6.18 1 475.86 NO SPLIT USE OFFSET ONE Comments: No Split just to force target acquisition orbit to remain free of grating change overhead, for planning purposes. ------------------------------------------------------------------------------------------------------------------------------------ 6 J1655-40 FOS/BL RAPID 4.3 PRISM READ-TIME=6.18 1 241.02 NO SPLIT USE OFFSET ONE ------------------------------------------------------------------------------------------------------------------------------------ 7 J1655-40 FOS/BL RAPID 4.3 G160L READ-TIME=3.70,SUB-STEP=2 1 2279.20 NO SPLIT EXPAND USE OFFSET ONE Comments: drop to SUB-STEP=2 for short read-time at low telemetry rate ------------------------------------------------------------------------------------------------------------------------------------ 8 J1655-40 FOS/BL RAPID 4.3 G160L READ-TIME=2.0 1 17.5 M MAX DUR 17.5 M NO SPLIT USE OFFSET ONE Comments: THIS IS THE MOST IMPORTANT EXPOSURE. For the echo-mapping experiment. Need the high telemetry rate, and onboard tape recorder. Only space for 17.5M of data on the tape recorder ( CAL/FOS 124) ------------------------------------------------------------------------------------------------------------------------------------ 9 J1655-40 FOS/BL RAPID 4.3 G160L READ-TIME=3.70,SUB-STEP=2 1 543.90 NO SPLIT USE OFFSET ONE Comments: drop to SUB-STEP=2 for short read-time at low telemetry rate ------------------------------------------------------------------------------------------------------------------------------------ 10 J1655-40 FOS/BL RAPID 4.3 PRISM READ-TIME=6.18 1 401.7 S NO SPLIT USE OFFSET ONE Comments: side change after BLUE exposures ------------------------------------------------------------------------------------------------------------------------------------ 13 J1655-40 FOS/RD RAPID 4.3 G270H READ-TIME=6.18 1 896.10 EXPAND USE OFFSET ONE Comments: Detailed observing plan optimised to 1655-40 visit 2 ------------------------------------------------------------------------------------------------------------------------------------ 14 J1655-40 FOS/RD RAPID 4.3 G400H READ-TIME=6.18 1 494.40 USE OFFSET ONE ------------------------------------------------------------------------------------------------------------------------------------ 15 J1655-40 FOS/RD RAPID 4.3 PRISM READ-TIME=6.18 1 426.42 USE OFFSET ONE ------------------------------------------------------------------------------------------------------------------------------------ 6017( 28) - 06/25/96 10:18 - [ 8] Visit: 03 Visit Requirements: AFTER 01 BY 8 D TO 17 D SCHED 100% ORIENT 340.5D TO 340.5D On Hold Comments: Additional Comments: Reuse same guide stars as Visit 1. Check posn with 5x5 ACQ/PEAK. Assume V=14.6, nu^1/3, E(B-V)=1 for exp calcs (supercedes fixed target comments). Choose best XTE overlap visibility excluding May 24-27 (Sco X-1 coordinated XTE obs). Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 3 J1655-40 FOS/BL ACQ/PEA 0.25-PA MIRROR SCAN-STEP-X=0.17,SCAN-STEP-Y=0.17 1 10.6 S ONBOARD ACQ FOR 6-15 NO K IR-A ,SEARCH-SIZE-X=5,SEARCH-SIZE-Y=5 SPLIT USE OFFSET ONE Comments: acq/peak to check position after reacquiring Visit 1's guide stars. FOS/RD exp time 2.56s. Exposures calculated for 10,000 counts. ------------------------------------------------------------------------------------------------------------------------------------ 6 J1655-40 FOS/BL RAPID 4.3 PRISM READ-TIME=6.18 1 692.16 NO SPLIT USE OFFSET ONE ------------------------------------------------------------------------------------------------------------------------------------ 7 J1655-40 FOS/BL RAPID 4.3 G160L READ-TIME=3.70,SUB-STEP=2 1 2941.50 EXPAND USE OFFSET ONE Comments: drop to SUB-STEP=2 for short read-time at low telemetry rate ------------------------------------------------------------------------------------------------------------------------------------ 8 J1655-40 FOS/BL RAPID 4.3 G160L READ-TIME=3.70,SUB-STEP=2 1 540.20 EXPAND USE OFFSET ONE Comments: This exposure can/should be combined with 7 and carried over occultation if this reduces Ohed. PARAMs IDENTICAL w/ 7. ------------------------------------------------------------------------------------------------------------------------------------ 9 J1655-40 FOS/BL RAPID 4.3 G160L READ-TIME=2.0 1 17.5 M MAX DUR 17.5 M NO SPLIT USE OFFSET ONE Comments: THIS IS THE MOST IMPORTANT EXPOSURE. For the echo-mapping experiment. Need the high telemetry rate. SHUFFLE ORDER of ORBITS to provide MAX simultaneous XTE coverage for this. ------------------------------------------------------------------------------------------------------------------------------------ 10 J1655-40 FOS/BL RAPID 4.3 PRISM READ-TIME=6.18 1 401.7 S NO SPLIT USE OFFSET ONE Comments: side change after BLUE exposures ------------------------------------------------------------------------------------------------------------------------------------ 13 J1655-40 FOS/RD RAPID 4.3 G270H READ-TIME=6.18 1 896.10 EXPAND USE OFFSET ONE Comments: Detailed observing plan optimised to 1655-40 visit 3 ------------------------------------------------------------------------------------------------------------------------------------ 14 J1655-40 FOS/RD RAPID 4.3 G400H READ-TIME=6.18 1 494.40 USE OFFSET ONE ------------------------------------------------------------------------------------------------------------------------------------ 15 J1655-40 FOS/RD RAPID 4.3 PRISM READ-TIME=6.18 1 426.42 USE OFFSET ONE ------------------------------------------------------------------------------------------------------------------------------------ 6017( 28) - 06/25/96 10:18 - [ 9] Visit: 04 Visit Requirements: AFTER 01 BY 21 D TO 28 D SCHED 90% ORIENT 35.9D TO 35.9D On Hold Comments: Additional Comments: ORIENTation as far as possible from nominal to enable REUSE TARGET OFFSET in subsequent visits. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 J1655-40 FOS/RD ACQ/PEA 4.3 MIRROR SEARCH-SIZE-X=1,SEARCH-SIZE-Y=3, 1 10 S ONBOARD ACQ FOR 2 K SCAN-STEP-Y=1.204 Comments: 1st stage acq/peak. Exp Time for FOS/RD 27S for 10,000 counts; shortened to 14.5s to get w/in 1 orbit. Must do Red side Acq for speed. Assumed nu^1/3, E(B-V)=1.0, B=18.2 for exposure. ------------------------------------------------------------------------------------------------------------------------------------ 2 J1655-40 FOS/RD ACQ/PEA 1.0-PAI MIRROR SCAN-STEP-X=0.602, 1 10 S ONBOARD ACQ FOR 3 K R-A SCAN-STEP-Y=0.602,SEARCH-SIZE-X=6 ,SEARCH-SIZE-Y=2 Comments: 2nd stage acq/peak. ------------------------------------------------------------------------------------------------------------------------------------ 3 J1655-40 FOS/RD ACQ/PEA 0.5 MIRROR SCAN-STEP-X=0.207, 1 13 S ONBOARD ACQ FOR 4-8 SAVE K SCAN-STEP-Y=0.207,SEARCH-SIZE-X=4 OFFSET TWO ,SEARCH-SIZE-Y=4 Comments: 3rd stage acq/peak. 4x4 scan rather than 5x5. Tony Keyes 3-aug-94: 4x4 in 0.5 aperture -> 0.11" uncertainty in x and y => 0.16" uncertainty in pointing. ------------------------------------------------------------------------------------------------------------------------------------ 4 J1655-40 FOS/RD RAPID 4.3 PRISM READ-TIME=2.0 1 1050.00 NO SPLIT MAX DUR 17.5 M Comments: High telemetry mode. Most important exposure for simultaneous XTE coverage. ------------------------------------------------------------------------------------------------------------------------------------ 5 J1655-40 FOS/RD RAPID 4.3 PRISM READ-TIME=3.70,SUB-STEP=2 1 936.10 NO SPLIT Comments: Detailed observing plan optimised to 1655-40 visit 4. SUB-STEP=2 to get high time resolution in low telemetry mode. ------------------------------------------------------------------------------------------------------------------------------------ 6 J1655-40 FOS/RD RAPID 4.3 PRISM READ-TIME=3.70,SUB-STEP=2 1 2460.50 EXPAND NO SPLIT Comments: Detailed observing plan optimised to 1655-40 visit 4. SUB-STEP=2 to get high time resolution in low telemetry mode. ------------------------------------------------------------------------------------------------------------------------------------ 7 J1655-40 FOS/BL RAPID 4.3 PRISM READ-TIME=3.70,SUB-STEP=2 1 2460.50 Comments: UV spectrum. ------------------------------------------------------------------------------------------------------------------------------------ 8 J1655-40 FOS/BL RAPID 4.3 PRISM READ-TIME=3.70,SUB-STEP=2 1 2168.2 EXPAND MAX DUR 2168.2 S ------------------------------------------------------------------------------------------------------------------------------------ 6017( 28) - 06/25/96 10:18 - [ 10] Visit: 05 Visit Requirements: AFTER 04 BY 11.75 D TO 15.25 D SCHED 100% ORIENT 35.9D TO 35.9D PERIOD 1 D AND ZERO-PHASE 20-Jun-1996 On Hold Comments: Additional Comments: Reuse same guide stars as Visit 4. Check posn with 5x5 ACQ/PEAK. Assume B=18.96, nu^1/3, E(B-V)=1.4 for exp calcs (supercedes fixed target comments). Choose best XTE overlap visibility. Choose 10h -16h UT if possible for AAT night - phase critical requirement used to express this. Relax constraint if unschedulable. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 J1655-40 FOS/RD ACQ/PEA 0.25-PA MIRROR SCAN-STEP-X=0.17,SCAN-STEP-Y=0.17 1 10.6 S ONBOARD ACQ FOR 2-6 NO K IR-A ,SEARCH-SIZE-X=5,SEARCH-SIZE-Y=5 SPLIT USE OFFSET TWO PHASE 0.417 TO 0.667 Comments: acq/peak to check position after reacquiring Visit 4's guide stars. Exposures should give ~2000 counts. Phase requirement to coordinate with AAT night. ------------------------------------------------------------------------------------------------------------------------------------ 2 J1655-40 FOS/RD RAPID 4.3 PRISM READ-TIME=3.70,SUB-STEP=2 1 691.90 NO SPLIT USE OFFSET TWO ------------------------------------------------------------------------------------------------------------------------------------ 3 J1655-40 FOS/RD RAPID 4.3 PRISM READ-TIME=3.70,SUB-STEP=2 1 991.60 NO SPLIT USE OFFSET TWO EXPAND END ORBIT ------------------------------------------------------------------------------------------------------------------------------------ 4 J1655-40 FOS/RD RAPID 4.3 PRISM READ-TIME=2.0,SUB-STEP=2 1 17.5 M NO SPLIT USE OFFSET TWO Comments: Rapid Telemetry mode. Limited to 17.5 Mins. Most important exposure for simultaneous XTE coverage. ------------------------------------------------------------------------------------------------------------------------------------ 5 J1655-40 FOS/BL RAPID 4.3 PRISM READ-TIME=3.70,SUB-STEP=2 1 2434.6 EXPAND NO SPLIT USE OFFSET TWO ------------------------------------------------------------------------------------------------------------------------------------ 6 J1655-40 FOS/BL RAPID 4.3 PRISM READ-TIME=3.70,SUB-STEP=2 1 2442.00 EXPAND NO SPLIT USE OFFSET TWO ------------------------------------------------------------------------------------------------------------------------------------ 6017( 28) - 06/25/96 10:18 - [ 11] Visit: 06 Visit Requirements: AFTER 04 BY 22 D TO 25 D SCHED 100% ORIENT 35.9D TO 35.9D On Hold Comments: Additional Comments: Reuse same guide stars as Visit 4. Check posn with 5x5 ACQ/PEAK. Assume B=18.96, nu^1/3, E(B-V)=1.4 for exp calcs (supercedes fixed target comments). Choose best XTE overlap visibility. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 J1655-40 FOS/RD ACQ/PEA 0.25-PA MIRROR SCAN-STEP-X=0.17,SCAN-STEP-Y=0.17 1 10.6 S ONBOARD ACQ FOR 2-5 NO K IR-A ,SEARCH-SIZE-X=5,SEARCH-SIZE-Y=5 SPLIT USE OFFSET TWO Comments: acq/peak to check position after reacquiring Visit 4's guide stars. Exposures should give ~2000 counts. ------------------------------------------------------------------------------------------------------------------------------------ 2 J1655-40 FOS/RD RAPID 4.3 PRISM READ-TIME=3.70,SUB-STEP=2 1 691.90 NO SPLIT USE OFFSET TWO ------------------------------------------------------------------------------------------------------------------------------------ 3 J1655-40 FOS/RD RAPID 4.3 PRISM READ-TIME=3.70,SUB-STEP=2 1 991.60 NO SPLIT USE OFFSET TWO EXPAND END ORBIT ------------------------------------------------------------------------------------------------------------------------------------ 4 J1655-40 FOS/RD RAPID 4.3 PRISM READ-TIME=2.0,SUB-STEP=2 1 17.5 M NO SPLIT USE OFFSET TWO Comments: Rapid Telemetry mode. Limited to 17.5 Mins. Most important exposure for simultaneous XTE coverage. ------------------------------------------------------------------------------------------------------------------------------------ 5 J1655-40 FOS/BL RAPID 4.3 PRISM READ-TIME=3.70,SUB-STEP=2 1 2442.00 EXPAND NO SPLIT USE OFFSET TWO ------------------------------------------------------------------------------------------------------------------------------------ 6017( 28) - 06/25/96 10:18 - [ 12] Visit: 07 Visit Requirements: SCHED 90% BETWEEN 22-Jul-1996 AND 29-Jul-1996 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 J1655-40 FOS/RD ACQ/PEA 4.3 MIRROR SEARCH-SIZE-X=1,SEARCH-SIZE-Y=3, 1 13.00 S ONBOARD ACQ FOR 2 K SCAN-STEP-Y=1.204 Comments: 1st stage acq/peak. ------------------------------------------------------------------------------------------------------------------------------------ 2 J1655-40 FOS/RD ACQ/PEA 1.0-PAI MIRROR SCAN-STEP-X=0.602, 1 13 S ONBOARD ACQ FOR 3 K R-A SCAN-STEP-Y=0.602,SEARCH-SIZE-X=6 ,SEARCH-SIZE-Y=2 Comments: 2nd stage acq/peak. ------------------------------------------------------------------------------------------------------------------------------------ 3 J1655-40 FOS/RD ACQ/PEA 0.5 MIRROR SCAN-STEP-X=0.207, 1 13 S ONBOARD ACQ FOR 4-6 K SCAN-STEP-Y=0.207,SEARCH-SIZE-X=4 ,SEARCH-SIZE-Y=4 Comments: 3rd stage acq/peak. 4x4 scan rather than 5x5. Tony Keyes 3-aug-94: 4x4 in 0.5 aperture -> 0.11" uncertainty in x and y => 0.16" uncertainty in pointing. ------------------------------------------------------------------------------------------------------------------------------------ 4 J1655-40 FOS/RD RAPID 4.3 PRISM READ-TIME=2.0 1 1050.00 NO SPLIT MAX DUR 17.5 M Comments: High telemetry mode. Most important exposure for simultaneous XTE coverage. ------------------------------------------------------------------------------------------------------------------------------------ 5 J1655-40 FOS/RD RAPID 4.3 PRISM READ-TIME=3.70,SUB-STEP=2 1 906.50 NO SPLIT END ORBIT Comments: Detailed observing plan optimised to 1655-40 visit 6. SUB-STEP=2 to get high time resolution in low telemetry mode. ------------------------------------------------------------------------------------------------------------------------------------ 6 J1655-40 FOS/RD RAPID 4.3 PRISM READ-TIME=3.70,SUB-STEP=2 1 2460.50 EXPAND NO SPLIT Comments: Detailed observing plan optimised to 1655-40 visit 6. SUB-STEP=2 to get high time resolution in low telemetry mode. ------------------------------------------------------------------------------------------------------------------------------------ 6017( 28) - 06/25/96 10:18 - [ 13] Summary Form for Proposal 6017 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/BL FOS/RD ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/PEAK RAPID ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SEARCH-SIZE-X=1 SEARCH-SIZE-Y=3 SCAN-STEP-Y=1.204 SEARCH-SIZE-Y=2 SEARCH-SIZE-Y=5 READ-TIME=6.18 SUB-STEP=2 READ-TIME=3.70 READ-TIME=2.0 SEARCH-SIZE-X=5 SCAN-STEP-Y=0.17 SEARCH-SIZE-X=6 SEARCH-SIZE-Y=4 SCAN-STEP-X=0.17 SCAN-STEP-Y=0.602 SEARCH-SIZE-X=4 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category Hot Stars ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 10-May-1996 AND 17-May-1996 SCHED 100% ON HOLD ORIENT 340.5D TO 340.5D ONBOARD ACQ FOR 2 NO SPLIT ONBOARD ACQ FOR 3 NO SPLIT ONBOARD ACQ FOR 4 NO SPLIT SAVE OFFSET ONE NO SPLIT EXPAND MAX DUR 17.5 M NO SPLIT AFTER 01 BY 2 D TO 8 D SCHED 100% ORIENT 340.5D TO 340.5D ONBOARD ACQ FOR 4 NO SPLIT USE OFFSET ONE NO SPLIT EXPAND USE OFFSET ONE MAX DUR 17.5 M NO SPLIT USE OFFSET ONE AFTER 01 BY 8 D TO 17 D SCHED 100% ORIENT 340.5D TO 340.5D ONBOARD ACQ FOR 6-15 NO SPLIT USE OFFSET ONE AFTER 01 BY 21 D TO 28 D SCHED 90% ORIENT 35.9D TO 35.9D ONBOARD ACQ FOR 2 ONBOARD ACQ FOR 3 ONBOARD ACQ FOR 4-8 SAVE OFFSET TWO NO SPLIT MAX DUR 17.5 M EXPAND NO SPLIT EXPAND MAX DUR 2168.2 S AFTER 04 BY 11.75 D TO 15.25 D SCHED 100% ORIENT 35.9D TO 35.9D PERIOD 1 D AND ZERO-PHASE 20-Jun-1996 ONBOARD ACQ FOR 2-6 NO SPLIT USE OFFSET TWO PHASE 0.417 TO 0.667 NO SPLIT USE OFFSET TWO NO SPLIT USE OFFSET TWO EXPAND END ORBIT EXPAND NO SPLIT USE OFFSET TWO AFTER 04 BY 22 D TO 25 D SCHED 100% ORIENT 35.9D TO 35.9D ONBOARD ACQ FOR 2-5 NO SPLIT USE OFFSET TWO SCHED 90% BETWEEN 22-Jul-1996 AND 29-Jul-1996 ONBOARD ACQ FOR 4-6 NO SPLIT END ORBIT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G190H G160L PRISM G270H G400H ------------------------------------------------------------------------------------------------------------------------------------ Target Names J1655-40 ------------------------------------------------------------------------------------------------------------------------------------