! File: 1383C.PROP ! Database: PEPDB ! Date: 16-FEB-1994:16:56:00 coverpage: title_1: HSP TIME RESOLVED PHOTOMETRY TEST HSP-04 proposal_for: SV/HSP pi_fname: ROBERT pi_mi: C. pi_lname: BLESS pi_inst: UNIVERSITY OF WISCONSIN pi_country: USA pi_phone: 608-262-1715 hours_pri: 4.92 num_pri: 1 ! end of coverpage abstract: line_1: This proposal defines the procedure for verifying the capability for line_2: HSP to continuously integrate at a very high data sampling rate. Using line_3: the visual IDT (IDT#3) the Crab Pulsar will be observed in a selected line_4: 1.0 arcsec aperture using 10.8 microsecond integration samples. This line_5: observation will verify the time resolution of the HSP and determine line_6: the HST system time reliability of scientific purposes. Observations line_7: of the Crab Pulsar at a 10.8 micosecond sampling rate will also verify line_8: the relevant Contract End Item (CEI) specification for the HSP. line_9: Revision History: Mark Slovak 11/03/88; Translated to V2 proposal line_10: instructions, Sally Laurent 1/30/89; Updated 3/9/89 - Peg Stanley; line_11: SV Scrub: 4/17/89 - Sally Laurent; Changed per P. Reppert's comments of line_12: 6/6/89 - SALM 8/9/89; Deleted HZ Herculis due to poor reliability in line_13: in variability - SALM 9/26/89; Changed pre-req & special req. - SALM line_14: 9/27/89; Updated text - SALM 5/25/90; Fixes for aberration problem - line_15: SALM 7/30/90; line_17: This test has been revised by P. Stanley (7/16/91) to take 1 "orbit's" line_18: worth of data over 4 consecutive days rather than 4 consecutive orbits ! ! end of abstract general_form_proposers: lname: BLESS fname: R. mi: C. inst: UNIVERSITY OF WISCONSIN country: USA ! lname: SLOVAK fname: M. mi: H. inst: UNIVERSITY OF WISCONSIN country: USA ! lname: DOLAN fname: J. mi: F. inst: GODDARD SPACE FLIGHT CENTER country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: The Crab Pulsar will be observed using the visual IDT (IDT#3) on the line_2: HSP, configured in the digital, single aperture mode. It will be line_3: acquired in real-time (Mode I Target Acquisition) in the 10 arcsec line_4: aperture and offset to the F400LP 1.0 arcsec aperture. Using a 10.8 line_5: microsecond integration time, at least 30 minutes of continuous line_6: data per orbit will be collected for four (4) orbits which are line_7: scheduled for full TDRSS support, if possible. If full TDRSS support line_8: is not possible, then STR may be used for a portion of the observation. ! question: 5 section: 1 line_1: Line 1 performs an INTERACTIVE ACQUISITION for the exposure in Line 2. The line_2: S/C maneuver calculated for this INT ACQ MUST be retained and reuplinked at line_3: the start of each exposure in lines 3, 4 and 5. A REQ UPLINK has been added line_4: to lines 3,4,5 for this purpose. line_6: The SAME GUIDE STARS MUST BE USED FOR ALL OF LINES 1-5 to enable this "blind" line_7: offset SIP to work. line_9: In addition, we have forced the S/C orientation to remain the same for the line_10: observations by use of the SAME ORIENT special requirement. ! question: 5 section: 2 line_1: Prerequisites: Schedule this test seven or more days after successful line_2: completion of OV proposal 1504, HSP (Mode I) Target Acquisition Test, line_3: HSP-01C. Real time acquisition of the Crab Pulsar is required because of line_4: the faint nature of the object and confused field. line_5: The observation should also be scheduled for orbits which avoid passage line_6: through the South Atlantic Anomoly (SAA) in order to minimize high background line_7: levels which will induce deleterious phase jitter. It should also be scheduled line_8: for four (4) orbits over 4 days with full TDRSS support, if possible. line_9: If full TDRSS support is not possble, then STR may be used for a portion line_10: of the observations. line_11: POINTING STABILITY: Coarse track is understood to have less than 19 marcsec line_12: pointing stability. This is satisfactory for all observations in the 10" line_13: and the 1.0" UV1, UV2, and VIS IDT apertures, the PMT, and 6.0" line_14: (finding) POL IDT aperture. HSP requires fine lock for all observations line_15: in the 0.65" POL IDT apertures and in all the 0.4" apertures. ! question: 7 section: 1 line_1: The data reduction consists of converting the IDT counts into count rates line_2: and plotting the data set as a time series. The data analysis will consist of line_3: synchronous co-addition of the data stream using the target pulsar ephemeris. line_4: The resulting phase diagram will be examined for phase jitter or drift, line_5: indicating a loss of timing integrity or data dropout. The derived epoch of line_6: the phase diagram will then be related to the recorded UTC time to ascertain line_7: the HST time relatability. The derived transformation coefficients between UTC line_8: and HST onboard time will be supplied to the Calibration Data Base (CDB). ! question: 8 section: 1 line_1: Coordinated ground based observations of the Crab pulsar would be line_2: desirable but are not essential. ! question: 10 section: 1 line_1: Data reduction and analysis will be supported on two computer facilities line_2: at the University of Wisconsin in Madison: line_3: a) a VAX 11/780 computer under the VMS operating system with line_4: extensive applications software. line_5: b) a microVAX cluster under the ULTRIX operating system. ! !end of general form text general_form_address: lname: DOLAN fname: JOE mi: F. category: CON inst: GSFC addr_1: CODE 681 city: GREENBELT state: MD zip: 20771 country: USA phone: 301-286-5920 ! lname: SLOVAK fname: MARK mi: H. category: CON inst: UNIV. OF WISCONSIN addr_1: 475 N. CHARTER STREET city: MADISON state: WI zip: 53706 country: USA phone: 608-262-7542 ! lname: BLESS fname: ROBERT mi: C. category: PI inst: UNIVERSITY OF WISCONSIN addr_1: 475 N. CHARTER STREET city: MADISON state: WI zip: 53706 country: USA phone: 608-262-1715 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: CRAB-PULSAR name_2: PSR0531+21 descr_1: VARIABLE STAR PULSAR-CRAB NEBULA pos_1: RA=5H 34M 31.94S +/- 0.3", pos_2: DEC=+22D 00' 52.15" +/- .3" equinox: 2000 pm_or_par: NO comment_1: POSREF: AVERAGE OF BEST POSITIONS, comment_2: POSREF: TOTAL ERROR = 0.6" fluxnum_1: 1 fluxval_1: V=16 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: CRAB-PULSAR config: HSP/VIS opmode: ACQ num_exp: 1 time_per_exp: 5.0M fluxnum_1: 1 priority: 1 req_1: INT ACQ FOR 2; req_2: SEQ 1-5 WITHIN 5D; req_3: CYCLE 0/1-5; comment_1: DO NOT SCHEDULE DURING SAA. comment_2: NOTE SAMPLE-TIME=0.75S. comment_3: SEE GENERAL FORM QUESTION 5 FOR comment_4: SCHEDULING REQUIREMENTS. SAME GS comment_5: MUST BE USED FOR ALL 5 EXPOSURES. ! linenum: 2.000 targname: CRAB-PULSAR config: HSP/VIS opmode: SINGLE aperture: 1.0 sp_element: F400LP num_exp: 1 time_per_exp: 36M fluxnum_1: 1 priority: 1 param_1: SAMPLE-TIME=0.0000108, param_2: DATA-FORMAT=BYTE, param_3: PRECISION=HIGH, req_1: RT ANALYSIS; comment_1: USES 1 MBIT DOWNLINK. comment_2: SCHEDULE. ! linenum: 3.000 targname: CRAB-PULSAR config: HSP/VIS opmode: SINGLE aperture: 1.0 sp_element: F400LP num_exp: 1 time_per_exp: 30M fluxnum_1: 1 priority: 1 param_1: SAMPLE-TIME=0.0000108, param_2: DATA-FORMAT=BYTE, param_3: PRECISION=HIGH, req_1: RT ANALYSIS; req_2: REQ UPLINK; req_3: SAME ORIENT FOR 3-5 AS 2; comment_1: A "SIP" WILL BE USED TO comment_2: APPLY THE SAME OFFSET FROM comment_3: LINE 1 INT ACQ TO EACH OF comment_4: LINES 3-5. ! linenum: 4.000 targname: CRAB-PULSAR config: HSP/VIS opmode: SINGLE aperture: 1.0 sp_element: F400LP num_exp: 1 time_per_exp: 30M fluxnum_1: 1 priority: 1 param_1: SAMPLE-TIME=0.0000108, param_2: DATA-FORMAT=BYTE, param_3: PRECISION=HIGH, req_1: RT ANALYSIS; req_2: REQ UPLINK; ! linenum: 5.000 targname: CRAB-PULSAR config: HSP/VIS opmode: SINGLE aperture: 1.0 sp_element: F400LP num_exp: 1 time_per_exp: 30M fluxnum_1: 1 priority: 1 param_1: SAMPLE-TIME=0.0000108, param_2: DATA-FORMAT=BYTE, param_3: PRECISION=HIGH, req_1: RT ANALYSIS; req_2: REQ UPLINK; ! ! end of exposure logsheet ! No scan data records found