Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 3251c Report Date: 09-May-96:18:17 Version: ********** Check-in Date: ********** 1.Proposal Title: REMNANT STARS IN SUPERNOVA REMNANTS ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID STELLAR ASTROPHYSICS GTO/HSP Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Robert C. Bless WISCONSIN, UNIVERSITY OF USA (608)262-1715 ------------------------------------------------------------------------------------ 7. Abstract The low frequency of occurrence of identified neutron stars located in supernova remnants (SNR's) is an unexplained embarassment to our generally accepted theories of stellar evolution and neutron star formation. We propose to search recent SNR's for any remnant star associated with them, and to study the photometric variability of known examples of neutron stars which are remnants of supernovae. The results will place important constraints on the mechanisms by which neutron stars originate. Revision History: Received on RPS 9/1/89; Added to SCCS 9/5/89 RPSS V7.2 remote & local; fixed small syntax err - SALM 9/12/89 Various small changes - Dolan 9/27/89; Condensed POL obs - SALM 2/23/90 Reduced Repeats - SALM 3/2/90; Moved SS433 to cycle2 - SALM 3/20/90; Changed cycle0 typo - SALM 4/19/90; Added needed ACQs for FOS obs - SALM 5/21/90; Added FOS acqs - SALM 5/30/90; "^"-"#",SEQ changes--BJW 7/12/90; Added repeats, exposure time to POL--BJW 8/20/90; Changes made at request of Joe Dolan--BJW 8/27/90, 9/19/90; Split proposal by cycle--BJW 3/23/91; Made changes for Joe Dolan--BJW 5/23/91; ------------------------------------------------------------------------------------ 8. Scientific Key Words: SUPERNOVA REMNANTS; NEUTRON STARS ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 20.00 par: 0 10. Num targs pri: 10 par: 0 ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 3251c PI: Robert C. Bless Proposal Title: REMNANT STARS IN SUPERNOVA REMNANTS ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Robert C. Bless WISCONSIN, UNIVERSITY OF USA Joseph F. Dolan NASA, GODDARD SPACE FLIGHT USA CENTER James L. Elliot MASSACHUSETTS INSTITUTE OF USA TECHNOLOGY Edward L. Robinson TEXAS, UNIVERSITY OF USA Richard L. White SPACE TELESCOPE SCIENCE USA INSTITUTE G. W. Van Citters NATIONAL SCIENCE FOUNDATION USA ------------------------------------------------------------------------------------ 3. Description of proposed observations. Searches for remnant stars at the center of recent SNR's would be conducted by the HSP in conjunction with the WFC and possibly the FOS. A WFC deep image of the SNR in the UV would reveal any suitably placed central images. These images would then be observed serially by the HSP in a wide bandwidth filter and the data analyzed for pulsation by fast Fourier transform methods. Observations in 3 different UV filters would allow the star to be plotted on a color-color diagram. Candidates with a hot color temperature or pulsation could be confirmed by an FOS spectrum. A neutron star spectrum would be expected to be a blue, featureless continuum a la the Crab nebula pulsar, but SS433 has a spectrum dominated by emission lines with relativistic velocity offsets and wavelength variations apparent from day to day. Hence, any candidate with an unusual spectrum would merit further study. Cycle 0 (SV/GTO) Observations: 1H 4M ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. (1) remnant stars are known from presently available upper limits on most SNR central stars to be fainter than V = 20; searching for a fainter star requires the limiting magnitude available only on ST. (2) remnant stars are expected to have spectra which peak strongly in the UV. This wavelength region is available for faint objects only on ST. (3) one method of identifying remnant stars searches for their pulsational periods which are expected to be in the sub-second to second range. Freedom from noise induced by atmospheric scintillation makes the HSP the most efficient and sensitive instrument available to detect such periodicities. Page 3 ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. Deep images of SNR's in the UV will be analyzed to determine whether any suitably placed central images exist. The HSP photometric observations of these candidates will be analyzed by power spectrum analysis methods to determine if any pulsation exists (as it does in the Crab Nebula and 1E2259+586). Three filter photometry will be analyzed to determine the color temperature of the candidate in a color-color diagram; candidate stars with a hot color temperature will be confirmed by an FOS spectrum. Neutron star spectra are expected to be blue, featureless continua, as in the Crab Nebula, but SS433 has a spectrum dominated by emission lines with relativistic velocity offsets and wavelength variations apparent from day to day. Any candidate with an unusual spectrum will be studied further photometrically. Wide bandwidth photometric observations will be analyzed by power spectrum analysis methods for pulsation in the source. Photometric observations will also be analyzed for longer periodicities which may be present in the light curve. Concurrent polarimetric observations will also be searched for longer periodicities present in the source. The results will be applied to determining the location, geometry, and motion of the emitting regions. ------------------------------------------------------------------------------------ 12. Searching for the remnant stars in supernova remnants is directly related to Scientific Objective 2 specified in the HSP CEI specifications, "searches for optical counterparts to radio pulsars". This program is also related to Scientific Objective 5, "determination of the wavelength and time dependence of polarization in compact binaries, white dwarfs. . . etc.". ------------------------------------------------------------------------------------ 13. Recent supernova remnants will be searched for any remnant star associated with them. The photometric variability of neutron stars which are remnant stars of supernova explosions will be monitored. The results will be used to place constraints upon the mechanisms by which neutron stars can originate. ------------------------------------------------------------------------------------ 11. Address Information Name: ROBERT C. BLESS Category: PI Institution: UNIVERSITY OF WISCONSIN Address: SPACE ASTRONOMY LAB. City: MADISON State: WI Zip Code: 53706 Country: USA Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ Name: JOSEPH F. DOLAN Category: CON Institution: NASA, GODDARD SPACE FLIGHT CENTER Address: CODE 681 City: GREENBELT State: MD Zip Code: 20771 Country: USA Telephone: (301)286-5920 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 3251c [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 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 SS433 V1343- REMNANT STAR IN SNR RA = 19H 09M 21.3S +/- 0.1S, 1950 BKG 1 V=14 AQL DEC = +04D 53' 54" +/- 1" ------------------------------------------------------------------------------------------------------------------------------------ 2 1E2259+586 X-RAY PULSAR IN SNR RA = 22H 59M 02.5S +/- 0.5S, ^ ^ DEC = +58D 36' 38" +/- 1" ------------------------------------------------------------------------------------------------------------------------------------ 3 1E2259+586- TO BE SELECTED; STAR RA = 22H 59M +/- 1M, 1950 OFFSET USED FOR OFFSET ACQ DEC = +58D 36' +/- 2' ------------------------------------------------------------------------------------------------------------------------------------ 4 1E2259+586- TO BE FOUND CANDIDATE RA-OFF = +0M +/- 5S, CAND1 REMNANT DEC-OFF = +0' +/- 1', FROM 3 ------------------------------------------------------------------------------------------------------------------------------------ 5 1E2259+586- TO BE FOUND CANDIDATE RA-OFF = +0M +/- 5S, CAND2 REMNANT DEC-OFF = +0' +/- 1', FROM 3 ------------------------------------------------------------------------------------------------------------------------------------ 6 1E2259+586- TO BE FOUND CANDIDATE RA-OFF = +0M +/- 5S, CAND3 REMNANT DEC-OFF = +0' +/- 1', FROM 3 ------------------------------------------------------------------------------------------------------------------------------------ 7 LMC-N49 GAMMA-RAY BURST SOURCE RA = 05H 25M 56S +/- 1S, 1950 ^ DEC = -66D 07' 07" +/- 1" ------------------------------------------------------------------------------------------------------------------------------------ 8 LMC-N49- TO BE SELECTED; STAR RA = 05H 25M +/- 1M, 1950 OFFSET USED FOR OFFSET ACQ DEC = -66D 07' +/- 2' ------------------------------------------------------------------------------------------------------------------------------------ 9 LMC-N49- TO BE FOUND CANDIDATE RA-OFF = +0M +/- 5S, CAND1 REMNANT DEC-OFF = +0' +/- 1', FROM 8 ------------------------------------------------------------------------------------------------------------------------------------ 10 LMC-N49- TO BE FOUND CANDIDATE RA-OFF = +0M +/- 5S, CAND2 REMNANT DEC-OFF = +0' +/- 1', FROM 8 ------------------------------------------------------------------------------------------------------------------------------------ 11 LMC-N49- TO BE FOUND CANDIDATE RA-OFF = +0M +/- 5S, CAND3 REMNANT DEC-OFF = +0' +/- 1', FROM 8 ------------------------------------------------------------------------------------------------------------------------------------ 12 CTB-80 X-RAY SOURCE; RA = 19H 51M 02.5S +/- 0.1S, 1950 BKG SNR DEC = +32D 44' 50.2" +/- 0.1" ------------------------------------------------------------------------------------------------------------------------------------ 13 CTB-80- TO BE SELECTED; STAR RA = 19H 51M +/- 1M, 1950 OFFSET USED FOR OFFSET ACQ DEC = +32D 44' +/- 2' ------------------------------------------------------------------------------------------------------------------------------------ 14 CTB-80-CAND1 TO BE FOUND CANDIDATE RA-OFF = +0M +/- 5S, REMNANT DEC-OFF = +0' +/- 1', FROM 13 ------------------------------------------------------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 3251c [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 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| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 15 CTB-80-CAND2 TO BE FOUND CANDIDATE RA-OFF = +0M +/- 5S, REMNANT DEC-OFF = +0' +/- 1', FROM 13 ------------------------------------------------------------------------------------------------------------------------------------ 16 CTB-80-CAND3 TO BE FOUND CANDIDATE RA-OFF = +0M +/- 5S, REMNANT DEC-OFF = +0' +/- 1', FROM 13 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 3251c [ 6] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 0.5 DEFINE # HSP/ ACQ 1 2M # 1 # ACQP POL ------------------------------------------------------------------------------------------------------------------------------------ 0.6 DEFINE # HSP/ ACQ 1 2M # 1 # ACQ2 UV2 ------------------------------------------------------------------------------------------------------------------------------------ 0.65 DEFINE # HSP/ ACQ 1 2M # 1 # ACQV VIS ------------------------------------------------------------------------------------------------------------------------------------ 0.7 DEFINE # FOS/RD ACQ/ 4.3 MIRROR 1 2M 1 # ACQF BINARY ------------------------------------------------------------------------------------------------------------------------------------ 1 DEFINE # HSP/ SINGLE 1.0 F140LP SAMPLE- 1 10M 1 # PULSE UV2 TIME=0.0000108 ------------------------------------------------------------------------------------------------------------------------------------ 2 ^ # HSP/ ^ 1.0 F160LP ^ ^ ^ # UV2 ------------------------------------------------------------------------------------------------------------------------------------ 3 DEFINE # HSP/ SINGLE POL0 # SAMPLE-TIME=0.1 ^ 180S ^ SEQ 3-6 NO GAP POL POL GUID TOL 0.020" / 3-6 ------------------------------------------------------------------------------------------------------------------------------------ 4 ^ # ^ ^ POL90 # ^ ^ ^ ^ ------------------------------------------------------------------------------------------------------------------------------------ 5 ^ # ^ ^ POL45 # ^ ^ ^ ^ ------------------------------------------------------------------------------------------------------------------------------------ 6 DEFINE # HSP/ SINGLE POL135 # SAMPLE-TIME=0.1 1 180S 1 # POL POL ------------------------------------------------------------------------------------------------------------------------------------ 7.1 DEFINE # WFC IMAGE ALL F336W 1 20M ^ WBLUE ------------------------------------------------------------------------------------------------------------------------------------ 7.2 DEFINE # PC IMAGE ALL F702W 1 30M # PFIND ------------------------------------------------------------------------------------------------------------------------------------ 8 DEFINE # WFC IMAGE ALL F702W 1 20M # WFIND ------------------------------------------------------------------------------------------------------------------------------------ 9 DEFINE # HSP/ SINGLE 1.0 F160LP SAMPLE- 1 40M # FFT VIS TIME=0.0001 ------------------------------------------------------------------------------------------------------------------------------------ 10 DEFINE ^ FOS/RD ACCUM 0.3 G650L 4000- 1 30M ^ CONF 8000 ------------------------------------------------------------------------------------------------------------------------------------ 10.9 USE SS433 10 1 CYCLE 2 /10.9-16.5 ACQ2 0.6S ONBOARD ACQ FOR 11 ------------------------------------------------------------------------------------------------------------------------------------ 11 USE SS433 1 PHASE 0.635 +/- PULSE 0.001 OF REF 12.0 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 3251c [ 7] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 11.1 USE ^ 10 ^ ONBOARD ACQ FOR ACQ2 0.6S 11.2 ------------------------------------------------------------------------------------------------------------------------------------ 11.2 USE ^ ^ REPEAT 11.1-11.2 PULSE EVERY 3.28D +/- 0.1D FOR 2 MORE TIMES AFTER 11 BY 3.28D +/- 0.1D ------------------------------------------------------------------------------------------------------------------------------------ 11.9 USE SS433 10 1 ONBOARD ACQ FOR 12 ACQ2 0.6S ------------------------------------------------------------------------------------------------------------------------------------ 12 USE SS433 ^ PHASE 0.000 +/- PULSE 0.001 ZERO-PHASE JD 2443562.27 +/- 0.39D PERIOD 162.532D +/- 0.062D ------------------------------------------------------------------------------------------------------------------------------------ 12.05 USE SS433 10 1 ONBOARD ACQ FOR ACQ2 0.6S 12.1 ------------------------------------------------------------------------------------------------------------------------------------ 12.1 USE SS433 1 PHASE 0.131 +/- PULSE 0.001 OF REF 12.0 ------------------------------------------------------------------------------------------------------------------------------------ 12.15 USE SS433 10 1 ONBOARD ACQ FOR ACQ2 0.6S 12.2 ------------------------------------------------------------------------------------------------------------------------------------ 12.2 USE SS433 ^ PHASE 0.311 +/- PULSE 0.001 OF REF 12.0 ------------------------------------------------------------------------------------------------------------------------------------ 12.25 USE SS433 10 1 ONBOARD ACQ FOR 13 ACQP 0.6S - 16 SEQ 12.25-16 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ 13 USE POL SS433 F216M X5 2 COND IF TAC OK / 12.25-16.5 ------------------------------------------------------------------------------------------------------------------------------------ 14 ^ ^ F237M X5 ^ ------------------------------------------------------------------------------------------------------------------------------------ 15 ^ ^ F277M X4 ^ ------------------------------------------------------------------------------------------------------------------------------------ 16 USE POL SS433 F327M X3 2 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 3251c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 16.05 USE SS433 10 1 ONBOARD ACQ FOR ACQP 0.6S 16.1 REPEAT 16.05-16.1 EVERY 2.19D +/- 0.1D FOR 4 MORE TIMES ------------------------------------------------------------------------------------------------------------------------------------ 16.1 USE POL SS433 F277M X4 2 AFTER 15 BY 2.19D +/- 0.1D ------------------------------------------------------------------------------------------------------------------------------------ 16.45 USE SS433 10 1 ONBOARD ACQ FOR ACQP 0.6S 16.5 REPEAT 16.45-16.5 EVERY 27.25D + /- 1.5D FOR 4 MORE TIMES ------------------------------------------------------------------------------------------------------------------------------------ 16.5 USE POL SS433 F277M X4 2 AFTER 15 BY 27.25D +/- 1.5D ------------------------------------------------------------------------------------------------------------------------------------ 17 USE CTB-80 2 EARLY ACQ FOR 18- PFIND 19.1 CYCLE 8 /17-23 Comments: DELAY UNTIL WF/PC II ------------------------------------------------------------------------------------------------------------------------------------ 17.5 USE CTB-80- 1 COND ON 17 IF STAR ACQV CAND1 FOUND INT ACQ FOR 18-19 ------------------------------------------------------------------------------------------------------------------------------------ 18 USE FFT CTB-80- ^ COND ON 17 IF STAR CAND1 FOUND ------------------------------------------------------------------------------------------------------------------------------------ 19 ^ CTB-80- ^ COND ON 17 IF STAR CAND2 FOUND ------------------------------------------------------------------------------------------------------------------------------------ 19.01 USE CTB-80- ^ SEQ 19.01-19.1 NO ACQF OFFSET GAP ONBOARD ACQ FOR 19.1 AFTER 18 BY 14D +/ - 7D Comments: AFTER 18 BY AT LEAST 7 DAYS SO WE CAN ANALYZE FOURIER SPECTRUM. ------------------------------------------------------------------------------------------------------------------------------------ 19.1 USE CTB-80- 2 COND ON 18 IF CONF CAND3 PULSATION FOUND Comments: CAND3 IS EITHER CAND1 OR CAND2 FROM ABOVE. ------------------------------------------------------------------------------------------------------------------------------------ 20 USE 1E2259+586 2 EARLY ACQ FOR 21- PFIND 23 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 3251c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 20.5 USE 1E2259+586- 1 COND ON 20 IF STAR ACQV CAND1 FOUND INT ACQ FOR 21-22 ------------------------------------------------------------------------------------------------------------------------------------ 21 USE FFT ^ ^ COND ON 20 IF STAR FOUND ------------------------------------------------------------------------------------------------------------------------------------ 22 ^ 1E2259+586- ^ COND ON 20 IF STAR CAND2 FOUND ------------------------------------------------------------------------------------------------------------------------------------ 22.5 USE 1E2259+586- ^ SEQ 22.5-23 NO GAP ACQF OFFSET ONBOARD ACQ FOR 23 AFTER 21 BY 14D +/ - 7D Comments: AFTER 21 BY AT LEAST 7D SO WE CAN ANALYZE FOURIER SPECTRUM. ------------------------------------------------------------------------------------------------------------------------------------ 23 USE 1E2259+586- ^ COND ON 21 IF CONF CAND3 PULSATION FOUND ------------------------------------------------------------------------------------------------------------------------------------ 24 USE LMC-N49 ^ EARLY ACQ FOR 25- WFIND 27 SEQ 24-24.1 CYCLE 8 /24-27 Comments: DELAY UNTIL WF/PC II. ------------------------------------------------------------------------------------------------------------------------------------ 24.1 USE ^ ^ WBLUE ------------------------------------------------------------------------------------------------------------------------------------ 24.5 USE LMC-N49- 1 COND ON 24 IF STAR ACQV CAND1 FOUND INT ACQ FOR 25-26 ------------------------------------------------------------------------------------------------------------------------------------ 25 USE FFT LMC-N49- 2 COND ON 24 IF STAR CAND1 FOUND ------------------------------------------------------------------------------------------------------------------------------------ 26 ^ LMC-N49- ^ COND ON 24 IF STAR CAND2 FOUND ------------------------------------------------------------------------------------------------------------------------------------ 26.5 USE LMC-N49- ^ SEQ 26.5-27 NO GAP ACQF OFFSET ONBOARD ACQ FOR 27 AFTER 25 BY 14D +/ - 7D Comments: AFTER 25 BY AT LEAST 7D SO WE CAN ANALYZE FOURIER SPECTRUM. ------------------------------------------------------------------------------------------------------------------------------------ 27 USE LMC-N49- ^ COND ON 25 IF CONF CAND3 PULSATION FOUND ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 3251c [ 10] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations HSP/POL HSP/UV2 HSP/VIS FOS/RD ^ WFC PC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ ACQ/BINARY SINGLE ^ IMAGE ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SAMPLE-TIME=0.0000108 SAMPLE-TIME=0.1 SAMPLE-TIME=0.0001 ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GTO/HSP ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 20.00 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category STELLAR ASTROPHYSICS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SEQ 3-6 NO GAP; GUID TOL 0.020" / 3-6; CYCLE 2 /10.9-16.5; ONBOARD ACQ FOR 11; PHASE 0.635 +/- 0.001 OF REF 12.0; ONBOARD ACQ FOR 11.2; REPEAT 11.1-11.2 EVERY 3.28D +/- 0.1D FOR 2 MORE TIMES; AFTER 11 BY 3.28D +/- 0.1D; ONBOARD ACQ FOR 12; PHASE 0.000 +/- 0.001; ZERO-PHASE JD 2443562.27 +/- 0.39D; PERIOD 162.532D +/- 0.062D; ONBOARD ACQ FOR 12.1; PHASE 0.131 +/- 0.001 OF REF 12.0; ONBOARD ACQ FOR 12.2; PHASE 0.311 +/- 0.001 ONBOARD ACQ FOR 13 - 16; SEQ 12.25-16 NO GAP; COND IF TAC OK / 12.25-16.5; ONBOARD ACQ FOR 16.1; REPEAT 16.05-16.1 EVERY 2.19D +/- 0.1D FOR 4 MORE TIMES; AFTER 15 BY 2.19D +/- 0.1D; ONBOARD ACQ FOR 16.5; REPEAT 16.45-16.5 EVERY 27.25D +/- 1.5D FOR 4 MORE TIMES; AFTER 15 BY 27.25D +/- 1.5D; EARLY ACQ FOR 18-19.1; CYCLE 8 /17-23; COND ON 17 IF STAR FOUND; INT ACQ FOR 18-19; SEQ 19.01-19.1 NO GAP; ONBOARD ACQ FOR 19.1; AFTER 18 BY 14D +/- 7D; COND ON 18 IF PULSATION FOUND; EARLY ACQ FOR 21-23; COND ON 20 IF STAR FOUND; INT ACQ FOR 21-22; SEQ 22.5-23 NO GAP; ONBOARD ACQ FOR 23; AFTER 21 BY 14D +/- 7D; COND ON 21 IF PULSATION FOUND; EARLY ACQ FOR 25-27; SEQ 24-24.1; CYCLE 8 /24-27; COND ON 24 IF STAR FOUND; INT ACQ FOR 25-26; SEQ 26.5-27 NO GAP; ONBOARD ACQ FOR 27; AFTER 25 BY 14D +/- 7D; COND ON 25 IF PULSATION FOUND; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR F140LP F160LP # F336W F702W G650L F216M F237M F277M F327M ------------------------------------------------------------------------------------------------------------------------------------ Target Names SS433 V1343-AQL 1E2259+586 1E2259+586-OFFSET 1E2259+586-CAND1 1E2259+586-CAND2 1E2259+586-CAND3 LMC-N49 LMC-N49-OFFSET LMC-N49-CAND1 LMC-N49-CAND2 LMC-N49-CAND3 CTB-80 CTB-80-OFFSET CTB-80-CAND1 CTB-80-CAND2 CTB-80-CAND3 ------------------------------------------------------------------------------------------------------------------------------------