7407( 22) - 03/19/01 07:45 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 7407 Version: 22 Check-in Date: 19-Mar-2001 07:45:09 1.Proposal Title: Continuation of Temporal Monitoring of the Crab Synchrotron Nebula ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 7 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Jeff Hester Arizona State University CoI: Paul Scowen Arizona State University N CoI: Curt Michel Rice University N CoI: James Graham University of California at Berkeley N CoI: John Gallagher University of Wisconsin-Madison N CoI: Alan Watson UNAM - Morelia N CoI: Ravi Sankrit Johns Hopkins University N ------------------------------------------------------------------------------------ 5. Abstract The synchrotron nebula surrounding the Crab pulsar has been the subject of intensive study for decades. It is generally accepted that the structure and activity in this region are due to wave phenomena near the termination shock of the pulsar wind, observations of which hold unique promise of leading to more complete models of the pulsar and its magnetosphere. Unfortunately, this promise has not been fulfilled, largely because of the low spatial resolution and uneven temporal coverage of existing studies. Recent HST WFPC2 observations of the Crab synchrotron nebula (Hester et al. 1995a, b) offer new hope in this quest. These data, which reach the natural size scale defined by the Larmor radius of energetic electrons, resolve the majority of the the known features in the Crab. For the first time it is possible to reliably establish the physical conditions (e.g., emissivities, equipartition fields, and pressures) of features associated with the wind and its termination shock. In addition the HST has probed the structure of the nebula very close to the pulsar itself, leading to the exciting discovery of a bright knot located only 1300 AU above the SE pole of the pulsar. It is clear, however, that the Crab is essentially dynamical in character, and to capitalize fully on the promise of HST observations will require temporal monitoring over several years. In Cycle 5 we have begun such a program. Here we propose to continue it through Cycle 6. ------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 2] Observations Description ------------------------ The program is a temporal monitor of the dynamical structure near the center of the Crab Nebula. F547M will be used to image the Crab on each of 9 1-orbit visits. Five of these visits will be separated from each other by three months. If these five visits are referred to as A through E, then four additional visits will be scheduled at C minus 1 month, C minus 1 week, C plus 1 week, and C plus one month. This set of observations will provide a full year's monitor of the Crab at 3 month resolution, in the middle of which the four additional observations will sample changes in the nebula over logarithmically stepped 1 week, 2 week, 1 month, and 2 month time scales. For these observations, the pulsar will be centered in the FOV of the Planetary Camera, providing the full resolution of the HST at 5500Angstrom. A full orbit CR- SPLIT F547M exposure will be taken on each visit. F547M is chosen because it offers both a broad passband and minimal contamination from emission lines. The existing WFPC2 have a minimum signal in the field of ~ 100 e^- per PC pixel in each of the two exposures, so the images will be photon noise limited everywhere. In addition to the PC1 observations of the center of the nebula, we will obtain ``serendipitous'' WFC images of much of the nebula located within ~ 90" of the pulsar as the orientation of the HST changes through the year. Real Time Justification ----------------------- This program is a temporal study of the evolution of the Crab Nebula, so scheduling is important. This study is built around 5 visits to the Crab, each separated from its neighbors by as close to 3 months as possible. The Crab emerges from the Sun avoidance zone on 96.217 and will remain accessible until 97.117, again emerging from the zone on 97.217. Meeting the timing requirements for these 5 visits then requires that observations be scheduled as soon as possible after emergence from the Sun avoidance zone on 96.217 and 97.217, and as late as possible prior to the Crab's entry into the avoidance zone on 97.117. Uniform temporal sampling then requires that the other two observations take place 1/3 and 2/3 of the way though the 96.217 to 97.117 window. The five orbits above provide a one- year monitor of what is going on in the nebula. The four additional temporal monitor exposures should be taken 1 month before, 1 week before, 1 week after, and 1 month after the ~ 97.26 visit. These will provide a sample of the behavior of the Crab on time scales as short as a week. It may appear that scheduling this program is difficult, and in fact doing so requires working in close cooperation with the scheduling branch at the STScI. However, we note that we have both a good understanding of what is possible and a good long-term working relationship with the relevant personnel at the STScI. We also note that we have been successful so far in scheduling the even more difficult Cycle 5 program of which this program is a continuation. While not specifically tagged as a long term proposal, we anticipate that on the basis of the extent, type, and time scales of evolution observed during Cycle 5, we will propose to continue the monitoring program in Cycle 7. Keck: An informal monitoring program has been in effect at the W. M. Keck telescope since November, 1993. Observations have been, and will continue to be, obtained at 2.3 Mum in seeing of typically ~ 0arcs6. These data will provide a long wavelength baseline for keeping track of spectral index variations. (Graham has access to Keck as Co-I of the team that developed the Keck NIRC.) Steward / Lowell: We have initiated a program of ground based monitoring of the Crab. This program was begun at Lowell, then moved to Steward Observatory this fall when Watson left Lowell. This ground based monitoring includes photometric and polarimetric observations. It is intended both to tie the HST observations to a ground based data set that can be longer term, and to provide additional data (e.g., polarization and spectral index monitoring) that will not be routinely obtained with HST. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 3] Data Distribution Paper Products: YES Media: ELECTRONIC Blocking Factor: 10 Ship To: PI_Address Ship Via: Email: ------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 4] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 CRAB-PULSAR- STAR, PULSAR, HALO RA=5H 34M 30.594S +/- 0.010S, J2000 V = 15.9+/-0.5 POS1 DEC= 22D 0' 58.12" +/- 0.10" 2 CRAB-PULSAR- STAR, PULSAR, HALO RA=5H 34M 33.874S +/- 0.010S, J2000 V = 15.9+/-0.5 POS2 DEC= 22D 1' 2.13" +/- 0.10" 7407( 22) - 03/19/01 07:45 - [ 5] Visit: 01 Visit Priority: Visit Requirements: AFTER 5-AUG-2000 ORIENT 268.0D TO 268.0D SCHED 60% On Hold Comments: Additional Comments: FIRST MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 CRAB-PULSAR WFPC2 IMAGE PC1-FIX F547M CLOCKS=NO,CR-SPLIT=NO,ATD-GAIN=7 1 1100 S -POS1 ------------------------------------------------------------------------------------------------------------------------------------ 15 CRAB-PULSAR WFPC2 IMAGE PC1-FIX F547M CLOCKS=NO,CR-SPLIT=NO,ATD-GAIN=7 1 1200 S -POS1 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 6] Visit: 02 Visit Priority: Visit Requirements: AFTER 01 BY 11D TO 12D SAME ORIENT AS 01 SCHED 60% On Hold Comments: Additional Comments: SECOND MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 20 CRAB-PULSAR WFPC2 IMAGE PC1-FIX F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS1 CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 7] Visit: 03 Visit Priority: Visit Requirements: AFTER 01 BY 22D TO 23D SAME ORIENT AS 01 SCHED 60% On Hold Comments: Additional Comments: THIRD MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 30 CRAB-PULSAR WFPC2 IMAGE PC1-FIX F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS1 CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 8] Visit: 04 Visit Priority: Visit Requirements: AFTER 01 BY 33D TO 34D SAME ORIENT AS 01 SCHED 60% On Hold Comments: Additional Comments: FOURTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 40 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS1 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 9] Visit: 05 Visit Priority: Visit Requirements: AFTER 01 BY 44D TO 46D SAME ORIENT AS 01 SCHED 60% On Hold Comments: Additional Comments: FIFTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 50 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS1 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 10] Visit: 06 Visit Priority: Visit Requirements: AFTER 01 BY 55D TO 56D SAME ORIENT AS 01 SCHED 60% On Hold Comments: Additional Comments: SIXTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 60 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS1 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 11] Visit: 07 Visit Priority: Visit Requirements: AFTER 01 BY 66D TO 67D SAME ORIENT AS 01 SCHED 60% On Hold Comments: Additional Comments: SEVENTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 60 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS1 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 12] Visit: 08 Visit Priority: Visit Requirements: AFTER 01 BY 77D TO 78D SAME ORIENT AS 01 SCHED 60% On Hold Comments: Additional Comments: EIGHTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 80 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS1 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 13] Visit: 09 Visit Priority: Visit Requirements: AFTER 01 BY 88D TO 89D SAME ORIENT AS 01 SCHED 60% On Hold Comments: Additional Comments: NINTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 90 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS1 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 14] Visit: 10 Visit Priority: Visit Requirements: AFTER 01 BY 99D TO 100.1D SAME ORIENT AS 01 SCHED 60% On Hold Comments: Additional Comments: TENTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 100 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS1 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 15] Visit: 11 Visit Priority: Visit Requirements: AFTER 01 BY 110D TO 111D SAME ORIENT AS 01 SCHED 60% On Hold Comments: Additional Comments: ELEVENTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 110 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-SPLIT=NO,ATD-GAIN=7 1 1100 S -POS1 IX ------------------------------------------------------------------------------------------------------------------------------------ 115 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-SPLIT=NO,ATD-GAIN=7 1 1200 S -POS1 IX ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 16] Visit: 12 Visit Priority: Visit Requirements: AFTER 01 BY 121D TO 122D SAME ORIENT AS 01 SCHED 100% On Hold Comments: Additional Comments: TWELFTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 120 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-SPLIT=NO,ATD-GAIN=7 1 1000 S -POS1 IX ------------------------------------------------------------------------------------------------------------------------------------ 125 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-SPLIT=NO,ATD-GAIN=7 1 1100 S -POS1 IX ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 17] Visit: 13 Visit Priority: Visit Requirements: AFTER 01 BY 132D TO 133.5D ORIENT 88.0D TO 88.0D SCHED 100% On Hold Comments: Additional Comments: THIRTEENTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 130 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-SPLIT=NO,ATD-GAIN=7 1 1000 S -POS2 IX ------------------------------------------------------------------------------------------------------------------------------------ 135 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-SPLIT=NO,ATD-GAIN=7 1 1100 S -POS2 IX ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 18] Visit: 14 Visit Priority: Visit Requirements: AFTER 01 BY 143D TO 144D SAME ORIENT AS 13 SCHED 100% On Hold Comments: Additional Comments: FOURTEENTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 140 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-SPLIT=NO,ATD-GAIN=7 1 1000 S -POS2 IX ------------------------------------------------------------------------------------------------------------------------------------ 145 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-SPLIT=NO,ATD-GAIN=7 1 1100 S -POS2 IX ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 19] Visit: 15 Visit Priority: Visit Requirements: AFTER 01 BY 154D TO 155.5D SAME ORIENT AS 13 SCHED 60% On Hold Comments: Additional Comments: FIFTEENTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 150 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS2 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 20] Visit: 16 Visit Priority: Visit Requirements: AFTER 01 BY 165D TO 166D SAME ORIENT AS 13 SCHED 60% On Hold Comments: Additional Comments: SIXTEENTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 160 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS2 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 21] Visit: 17 Visit Priority: Visit Requirements: AFTER 01 BY 176D TO 177D SAME ORIENT AS 13 SCHED 60% On Hold Comments: Additional Comments: SEVENTEENTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 170 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS2 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 22] Visit: 18 Visit Priority: Visit Requirements: AFTER 01 BY 187D TO 188D SAME ORIENT AS 13 SCHED 60% On Hold Comments: Additional Comments: EIGHTEENTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 180 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS2 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 23] Visit: 19 Visit Priority: Visit Requirements: AFTER 01 BY 198D TO 199D SAME ORIENT AS 13 SCHED 60% On Hold Comments: Additional Comments: NINETEENTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 190 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS2 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 24] Visit: 20 Visit Priority: Visit Requirements: AFTER 01 BY 209D TO 210D SAME ORIENT AS 13 SCHED 60% On Hold Comments: Additional Comments: TWENTIETH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 200 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS2 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 25] Visit: 21 Visit Priority: Visit Requirements: AFTER 01 BY 220D TO 221D SAME ORIENT AS 13 SCHED 60% On Hold Comments: Additional Comments: TWENTY-FIRST MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 210 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS2 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 26] Visit: 22 Visit Priority: Visit Requirements: AFTER 01 BY 231D TO 232D SAME ORIENT AS 13 SCHED 60% On Hold Comments: Additional Comments: TWENTY-SECOND MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 220 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS2 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 27] Visit: 23 Visit Priority: Visit Requirements: AFTER 01 BY 242D TO 243D SAME ORIENT AS 13 SCHED 60% On Hold Comments: Additional Comments: TWENTY-THIRD MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 230 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS2 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 28] Visit: 24 Visit Priority: Visit Requirements: AFTER 01 BY 253D TO 254D SAME ORIENT AS 13 SCHED 60% On Hold Comments: Additional Comments: TWENTY-FOURTH MONITOR EXPOSURE. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 240 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS2 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 29] Visit: 59 Visit Priority: Visit Requirements: ORIENT 88.0D TO 88.0D SCHED 60% BEFORE 30-MAY-2001 On Hold Comments: Additional Comments: REPEAT OF VISIT 9. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 90 CRAB-PULSAR WFPC2 IMAGE WFALL-F F547M CLOCKS=NO,CR-TOLERANCE=0.0, 1 2400 S -POS1 IX CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7407( 22) - 03/19/01 07:45 - [ 30] Summary Form for Proposal 7407 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PC1-FIX WFALL-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CLOCKS=NO CR-SPLIT=NO ATD-GAIN=7 CR-SPLIT=0.5 CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 5-AUG-2000 ORIENT 268.0D TO 268.0D SCHED 60% AFTER 01 BY 11D TO 12D SAME ORIENT AS 01 SCHED 60% AFTER 01 BY 22D TO 23D SAME ORIENT AS 01 SCHED 60% AFTER 01 BY 33D TO 34D SAME ORIENT AS 01 SCHED 60% AFTER 01 BY 44D TO 46D SAME ORIENT AS 01 SCHED 60% AFTER 01 BY 55D TO 56D SAME ORIENT AS 01 SCHED 60% AFTER 01 BY 66D TO 67D SAME ORIENT AS 01 SCHED 60% AFTER 01 BY 77D TO 78D SAME ORIENT AS 01 SCHED 60% AFTER 01 BY 88D TO 89D SAME ORIENT AS 01 SCHED 60% AFTER 01 BY 99D TO 100.1D SAME ORIENT AS 01 SCHED 60% AFTER 01 BY 110D TO 111D SAME ORIENT AS 01 SCHED 60% AFTER 01 BY 121D TO 122D SAME ORIENT AS 01 SCHED 100% AFTER 01 BY 132D TO 133.5D ORIENT 88.0D TO 88.0D SCHED 100% AFTER 01 BY 143D TO 144D SAME ORIENT AS 13 SCHED 100% AFTER 01 BY 154D TO 155.5D SAME ORIENT AS 13 SCHED 60% AFTER 01 BY 165D TO 166D SAME ORIENT AS 13 SCHED 60% AFTER 01 BY 176D TO 177D SAME ORIENT AS 13 SCHED 60% AFTER 01 BY 187D TO 188D SAME ORIENT AS 13 SCHED 60% AFTER 01 BY 198D TO 199D SAME ORIENT AS 13 SCHED 60% AFTER 01 BY 209D TO 210D SAME ORIENT AS 13 SCHED 60% AFTER 01 BY 220D TO 221D SAME ORIENT AS 13 SCHED 60% AFTER 01 BY 231D TO 232D SAME ORIENT AS 13 SCHED 60% AFTER 01 BY 242D TO 243D SAME ORIENT AS 13 SCHED 60% AFTER 01 BY 253D TO 254D SAME ORIENT AS 13 SCHED 60% ORIENT 88.0D TO 88.0D SCHED 60% BEFORE 30-MAY-2001 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F547M ------------------------------------------------------------------------------------------------------------------------------------ Target Names CRAB-PULSAR-POS1 CRAB-PULSAR-POS2 ------------------------------------------------------------------------------------------------------------------------------------