! File: 4888C.PROP ! Database: PEPDB ! Date: 23-FEB-1994:08:08:40 coverpage: title_1: REMNANT STARS IN SUPERNOVA REMNANTS-AUG - CYC3HIGH sci_cat: STELLAR ASTROPHYSICS proposal_for: AUG/HSP cont_id: 3251 pi_fname: ROBERT pi_mi: C. pi_lname: BLESS pi_inst: WISCONSIN, UNIVERSITY OF pi_country: USA pi_phone: (608)262-1715 keywords_1: SUPERNOVA REMNANTS; NEUTRON STARS hours_pri: 31.24 num_pri: 10 ! end of coverpage abstract: line_1: The low frequency of occurrence of identified line_2: neutron stars located in supernova remnants (SNR's) line_3: is an unexplained embarassment to our generally line_4: accepted theories of stellar evolution and neutron line_5: star formation. We propose to search recent SNR's line_6: for any remnant star associated with them, and to line_7: study the photometric variability of known examples line_8: of neutron stars which are remnants of supernovae. line_9: The results will place important constraints on the line_10: mechanisms by which neutron stars originate. line_11: Revision History: Prepared for augmentation line_12: submission--Dolan 5/8/92; ! ! end of abstract general_form_proposers: lname: BLESS fname: ROBERT mi: C. inst: WISCONSIN, UNIVERSITY OF country: USA ! lname: DOLAN fname: JOSEPH mi: F. inst: NASA, GODDARD SPACE FLIGHT CENTER country: USA ! lname: ELLIOT fname: JAMES mi: L. inst: MASSACHUSETTS INSTITUTE OF TECHNOLOGY country: USA ! lname: ROBINSON fname: EDWARD mi: L. inst: TEXAS, UNIVERSITY OF country: USA ! lname: WHITE fname: RICHARD mi: L. inst: SPACE TELESCOPE SCIENCE INSTITUTE country: USA ! lname: VAN CITTERS fname: G. mi: W. inst: NATIONAL SCIENCE FOUNDATION country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: Searches for remnant stars at the center of recent line_2: SNR's would be conducted by the HSP in conjunction line_3: with the WFC and possibly the FOS. A WFC deep image line_4: of the SNR in the UV would reveal any suitably line_5: placed central images. These images would then be line_6: observed serially by the HSP in a wide bandwidth line_7: filter and the data analyzed for pulsation by fast line_8: Fourier transform methods. Observations in 3 line_9: different UV filters would allow the star to be line_10: plotted on a color-color diagram. Candidates with a line_11: hot color temperature or pulsation could be line_12: confirmed by an FOS spectrum. A neutron star line_13: spectrum would be expected to be a blue, featureless line_14: continuum a la the Crab nebula pulsar, but SS433 has line_15: a spectrum dominated by emission lines with line_16: relativistic velocity offsets and wavelength line_17: variations apparent from day to day. Hence, any line_18: candidate with an unusual spectrum would merit line_19: further study. Cycle 0 (SV/GTO) Observations: 1H 4M ! question: 4 section: 1 line_1: (1) remnant stars are known from presently available line_2: upper limits on most SNR central stars to be fainter line_3: than V = 20; searching for a fainter star requires line_4: the limiting magnitude available only on ST. (2) line_5: remnant stars are expected to have spectra which line_6: peak strongly in the UV. This wavelength region is line_7: available for faint objects only on ST. (3) one line_8: method of identifying remnant stars searches for line_9: their pulsational periods which are expected to be line_10: in the sub-second to second range. Freedom from line_11: noise induced by atmospheric scintillation makes the line_12: HSP the most efficient and sensitive instrument line_13: available to detect such periodicities. ! question: 7 section: 1 line_1: Deep images of SNR's in the UV will be analyzed to line_2: determine whether any suitably placed central images line_3: exist. The HSP photometric observations of these line_4: candidates will be analyzed by power spectrum line_5: analysis methods to determine if any pulsation line_6: exists (as it does in the Crab Nebula and line_7: 1E2259+586). Three filter photometry will be line_8: analyzed to determine the color temperature of the line_9: candidate in a color-color diagram; candidate stars line_10: with a hot color temperature will be confirmed by an line_11: FOS spectrum. Neutron star spectra are expected to line_12: be blue, featureless continua, as in the Crab line_13: Nebula, but SS433 has a spectrum dominated by line_14: emission lines with relativistic velocity offsets line_15: and wavelength variations apparent from day to day. line_16: Any candidate with an unusual spectrum will be line_17: studied further photometrically. Wide bandwidth line_18: photometric observations will be analyzed by power line_19: spectrum analysis methods for pulsation in the line_20: source. Photometric observations will also be ! question: 12 section: 1 line_1: Searching for the remnant stars in supernova line_2: remnants is directly related to Scientific Objective line_3: 2 specified in the HSP CEI specifications, "searches line_4: for optical counterparts to radio pulsars". This line_5: program is also related to Scientific Objective 5, line_6: "determination of the wavelength and time dependence line_7: of polarization in compact binaries, white dwarfs. . line_8: . etc.". ! question: 13 section: 1 line_1: Recent supernova remnants will be searched for any line_2: remnant star associated with them. The photometric line_3: variability of neutron stars which are remnant stars line_4: of supernova explosions will be monitored. The line_5: results will be used to place constraints upon the line_6: mechanisms by which neutron stars can originate. ! !end of general form text general_form_address: lname: BLESS fname: ROBERT mi: C. category: PI inst: UNIVERSITY OF WISCONSIN addr_1: SPACE ASTRONOMY LAB. city: MADISON state: WI zip: 53706 country: USA ! lname: DOLAN fname: JOSEPH mi: F. category: CON inst: NASA, GODDARD SPACE FLIGHT CENTER addr_1: CODE 681 city: GREENBELT state: MD zip: 20771 country: USA phone: (301)286-5920 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: SS433 name_2: V1343-AQL descr_1: REMNANT STAR IN SNR pos_1: RA = 19H 11M 49.5S +/- 0.1S, pos_2: DEC = +04D 58' 58" +/- 1" equinox: 2000 comment_1: POSREF = DOLAN fluxnum_1: 1 fluxval_1: V=14 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 0.500 sequence_1: DEFINE sequence_2: ACQP targname: # config: HSP/POL opmode: ACQ num_exp: 1 time_per_exp: 1M s_to_n: # fluxnum_1: 1 priority: # ! linenum: 0.600 sequence_1: DEFINE sequence_2: ACQ2 targname: # config: HSP/UV2 opmode: ACQ num_exp: 1 time_per_exp: 2M s_to_n: # fluxnum_1: 1 priority: # ! linenum: 1.000 sequence_1: DEFINE sequence_2: PULSE targname: # config: HSP/UV2 opmode: SINGLE aperture: 10.0 sp_element: F140LP num_exp: 1 time_per_exp: 20M fluxnum_1: 1 priority: # param_1: SAMPLE-TIME=0.0000108, ! linenum: 3.000 sequence_1: DEFINE sequence_2: POL targname: # config: HSP/POL opmode: SINGLE aperture: POL0 sp_element: # num_exp: ^ time_per_exp: 180S fluxnum_1: ^ priority: ^ param_1: SAMPLE-TIME=0.1, req_1: SEQ 3-6 NO GAP; ! linenum: 4.000 sequence_1: ^ targname: # config: ^ opmode: ^ aperture: POL90 sp_element: # num_exp: ^ time_per_exp: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 5.000 sequence_1: ^ targname: # config: ^ opmode: ^ aperture: POL45 sp_element: # num_exp: ^ time_per_exp: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 6.000 sequence_1: DEFINE sequence_2: POL targname: # config: HSP/POL opmode: SINGLE aperture: POL135 sp_element: # num_exp: 1 time_per_exp: 180S fluxnum_1: 1 priority: # param_1: SAMPLE-TIME=0.1, ! linenum: 10.900 sequence_1: USE ACQ2 targname: SS433 s_to_n: 10 s_to_n_time: 0.6S priority: 1 req_1: ONBOARD ACQ FOR 11; req_2: CYCLE 3 / 10.9-20.8; req_3: PCS MODE F / 10.9-20.8; ! linenum: 11.000 sequence_1: USE sequence_2: PULSE targname: SS433 priority: 1 req_1: PHASE 0.635 +/- 0.001 OF req_2: REF 12.0; req_3: RT-ANALYSIS; ! linenum: 11.100 sequence_1: USE ACQ2 targname: SS433 s_to_n: 10 s_to_n_time: 0.6S priority: 1 req_1: ONBOARD ACQ FOR 11.2; req_2: AFTER 10.9 BY 3.28D +/- 0.1D; ! linenum: 11.200 sequence_1: USE PULSE targname: ^ priority: ^ req_1: RT-ANALYSIS; ! linenum: 11.300 sequence_1: USE ACQ2 targname: ^ s_to_n: 10 s_to_n_time: 0.6S priority: ^ req_1: ONBOARD ACQ FOR 11.4; req_2: AFTER 10.9 BY 6.56D +/- 0.1D; ! linenum: 11.400 sequence_1: USE PULSE targname: ^ priority: ^ req_1: RT-ANALYSIS; ! linenum: 11.500 sequence_1: USE ACQ2 targname: ^ s_to_n: 10 s_to_n_time: 0.6S priority: ^ req_1: ONBOARD ACQ FOR 11.6; req_2: AFTER 10.9 BY 9.84D +/- 0.1D; ! linenum: 11.600 sequence_1: USE PULSE targname: ^ priority: ^ req_1: RT-ANALYSIS; ! linenum: 11.900 sequence_1: USE ACQ2 targname: SS433 s_to_n: 10 s_to_n_time: 0.6S priority: 1 req_1: ONBOARD ACQ FOR 12; ! linenum: 12.000 sequence_1: USE sequence_2: PULSE targname: SS433 priority: ^ req_1: PHASE 0.000 +/- 0.001; req_2: ZERO-PHASE JD 2443562.27 +/- 0.39D; req_3: PERIOD 162.532D +/- 0.062D; req_4: RT-ANALYSIS; ! linenum: 12.050 sequence_1: USE ACQ2 targname: SS433 s_to_n: 10 s_to_n_time: 0.6S priority: 1 req_1: ONBOARD ACQ FOR 12.1; ! linenum: 12.100 sequence_1: USE sequence_2: PULSE targname: SS433 priority: 1 req_1: PHASE 0.131 +/- 0.001 req_2: OF REF 12.0; req_3: RT-ANALYSIS; ! linenum: 12.150 sequence_1: USE ACQ2 targname: SS433 s_to_n: 10 s_to_n_time: 0.6S priority: 1 req_1: ONBOARD ACQ FOR 12.2; ! linenum: 12.200 sequence_1: USE sequence_2: PULSE targname: SS433 priority: 1 req_1: PHASE 0.311 +/- 0.001 req_2: OF REF 12.0; req_3: RT-ANALYSIS; ! linenum: 12.250 sequence_1: USE ACQP targname: SS433 s_to_n: 10 s_to_n_time: 0.6S priority: 1 req_1: ONBOARD ACQ FOR 13 - 16.02; req_2: SEQ 12.25-16.02 NO GAP; ! linenum: 13.000 sequence_1: USE sequence_2: POL targname: SS433 sp_element: F216M priority: 2 ! linenum: 13.100 sequence_1: USE sequence_2: POL targname: SS433 sp_element: F216M priority: 2 ! linenum: 13.200 sequence_1: USE sequence_2: POL targname: SS433 sp_element: F216M priority: 2 ! linenum: 13.300 sequence_1: USE sequence_2: POL targname: SS433 sp_element: F216M priority: 2 ! linenum: 13.400 sequence_1: USE sequence_2: POL targname: SS433 sp_element: F216M priority: 2 ! linenum: 14.000 sequence_1: ^ targname: ^ sp_element: F237M priority: ^ ! linenum: 14.100 sequence_1: ^ targname: ^ sp_element: F237M priority: ^ ! linenum: 14.200 sequence_1: USE sequence_2: POL targname: SS433 sp_element: F237M priority: 2 ! linenum: 14.300 sequence_1: ^ targname: ^ sp_element: F237M priority: ^ ! linenum: 14.400 sequence_1: ^ targname: ^ sp_element: F237M priority: ^ ! linenum: 15.000 sequence_1: ^ targname: ^ sp_element: F277M priority: ^ ! linenum: 15.100 sequence_1: ^ targname: ^ sp_element: F277M priority: ^ ! linenum: 15.200 sequence_1: ^ targname: ^ sp_element: F277M priority: ^ ! linenum: 15.300 sequence_1: ^ targname: ^ sp_element: F277M priority: ^ ! linenum: 16.000 sequence_1: USE sequence_2: POL targname: SS433 sp_element: F327M priority: 2 ! linenum: 16.010 sequence_1: USE sequence_2: POL targname: SS433 sp_element: F327M priority: 2 ! linenum: 16.020 sequence_1: USE sequence_2: POL targname: SS433 sp_element: F327M priority: 2 ! linenum: 16.050 sequence_1: USE ACQP targname: SS433 s_to_n: 10 s_to_n_time: 0.6S priority: 1 req_1: ONBOARD ACQ FOR 16.1-16.103; req_2: AFTER 15 BY 2.19D +/- 0.25D; ! linenum: 16.100 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.101 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.102 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.103 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.111 sequence_1: USE ACQP targname: SS433 s_to_n: 10 s_to_n_time: 0.6S priority: 1 req_1: ONBOARD ACQ FOR 16.112-16.115; req_2: AFTER 15 BY 4.38D +/- 0.25D; ! linenum: 16.112 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.113 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.114 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.115 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.121 sequence_1: USE ACQP targname: SS433 s_to_n: 10 s_to_n_time: 0.6S priority: 1 req_1: ONBOARD ACQ FOR 16.122-16.125; req_2: AFTER 15 BY 6.57D +/- 0.25D; ! linenum: 16.122 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.123 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.124 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.125 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.131 sequence_1: USE ACQP targname: SS433 s_to_n: 10 s_to_n_time: 0.6S priority: 1 req_1: ONBOARD ACQ FOR 16.132-16.135; req_2: AFTER 15 BY 8.76D +/- 0.25D; ! linenum: 16.132 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.133 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.134 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.135 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.450 sequence_1: USE ACQP targname: SS433 s_to_n: 10 s_to_n_time: 0.6S priority: 1 req_1: ONBOARD ACQ FOR 16.5-16.8; req_2: AFTER 15 BY 190.75D +/- 1.5D; ! linenum: 16.500 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.600 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.700 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 16.800 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 17.450 sequence_1: USE ACQP targname: SS433 s_to_n: 10 s_to_n_time: 0.6S priority: 1 req_1: ONBOARD ACQ FOR 17.5-17.8; req_2: AFTER 15 BY 163.50D +/- 1.5D; ! linenum: 17.500 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 17.600 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 17.700 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 17.800 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 18.450 sequence_1: USE ACQP targname: SS433 s_to_n: 10 s_to_n_time: 0.6S priority: 1 req_1: ONBOARD ACQ FOR 18.5-18.8; req_2: AFTER 15 BY 81.75D +/- 1.5D; ! linenum: 18.500 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 18.600 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 18.700 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 18.800 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 19.450 sequence_1: USE ACQP targname: SS433 s_to_n: 10 s_to_n_time: 0.6S priority: 1 req_1: ONBOARD ACQ FOR 19.5-19.8; req_2: AFTER 15 BY 109.00D +/- 1.5D; ! linenum: 19.500 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 19.600 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 19.700 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 19.800 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 20.450 sequence_1: USE ACQP targname: SS433 s_to_n: 10 s_to_n_time: 0.6S priority: 1 req_1: ONBOARD ACQ FOR 20.5-20.8; req_2: AFTER 15 BY 136.25D +/- 1.5D; ! linenum: 20.500 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 20.600 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 20.700 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! linenum: 20.800 sequence_1: USE POL targname: SS433 sp_element: F277M priority: 2 ! ! end of exposure logsheet ! No scan data records found