Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 1379c Report Date: 09-May-96:16:36 Version: ********** Check-in Date: ********** 1.Proposal Title: HSP DETECTOR DARK COUNT TEST HSP-I1 ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID OV/HSP Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Dr. Robert C. Bless UNIVERSITY OF WISCONSIN USA (608) 262-1715 PROF. OF ASTRONOMY ------------------------------------------------------------------------------------ 7. Abstract This proposal defines the procedure for monitoring the dark count on each of the HSP detectors to determine the instrumental noise characteristics. It is an internal test intended to become a routine procedure. Each of the four IDTs will be sampled at three different cathode locations; the PMT will be monitored as well. Note: This is RPSS file # 1379. Revision history: Richards 4/13/88, Slovak 5/20/88, Richards 6/29/88, Translate to V2 instructions and changed sample time to 0.1 sec Richards 12/28/88 ------------------------------------------------------------------------------------ 8. Scientific Key Words: ORBITAL VERIFICATION ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 2.00 par: 0 10. Num targs pri: 0 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: HSP ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 1379c PI: Dr. Robert C. Bless Proposal Title: HSP DETECTOR DARK COUNT TEST HSP-I1 ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Dr. Mark H. Slovak UNIVERSITY OF WISCONSIN USA Dr. Joseph F. Dolan GODDARD SPACE FLIGHT CENTER USA Dr. Robert C. Bless UNIVERSITY OF WISCONSIN USA ------------------------------------------------------------------------------------ 2. Scientific Justification. The justification for the proposed test is to determine the time, temperature and spatial dependencies of the dark count characteristics of each of the five HSP detectors. The four IDTs will be spatially mapped at three different cathode locations across the face of each detector; the dark from the PMT will also be measured. Each detector will be tested in both the digital and analog modes of operation. This test is to be repeated regularly as it is anticipated that the results (e.g., mean dark count rates for each detector) will be inputs for the Calibration Data Base (CDB). The in-flight results will be compared with the extant data currently available from ground testing. ------------------------------------------------------------------------------------ 3. Description of proposed observations. This test is to be performed during dark time, and during the PMT portion of the test the ST should be pointing at the dark earth. 1) IDTs (i=1,4): the HSP is to be configured in the single-color, one aperture mode (HSP/x, SINGLE) with the detector at nominal high voltage and PAD settings. Each detector is to be sampled at the central cathode position and at two other positions along the edge of the cathode, none of which correspond to any aperture. These three positions have the following detector coordinate positions: (a) (H,V) = (2000,1900) (b) (H,V) = (3600,1900) (c) (H,V) = (2000,3000) An integration of 5 minutes in length, sampling at 0.1 second samples, is to be obtained at each position. The detector high voltage will then be turned off and a fourth 5 minute integration made at (H,V) = (2000, 1900) 2) PMT: Operating at the nominal high voltage the dark current is to be sampled for 5 minutes. The PMT high voltage will then be turned off and a second 5 minute integration made. Data are to be taken in the ALL format. Each detector is turned off after the required data is obtained. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. HSP tests HSP-iA through -iF must be completed before this test is initiated. AT LEAST 24 HOURS MUST BE ALLOWED AFTER THE INITIAL TURN-ON OF THE LAST DETECTOR IN HSP-iF BEFORE THIS TEST IS PERFORMED. This is an internal test and no external targets are observed. Dark time is required for the entire test, and for the PMT portion of the test it test it is required that the ST be pointing at the dark earth. To perform the test, it is assumed that each detector has been successfully powered up for 30 minutes, which is the case if the standard stabilization times are used. Dark time and non-SAA passage are required for this test. Page 3 ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. The data reduction is planned as follows: for each of the detectors the mean dark count rate (digital mode) will be determined as a function of cathode position. After the test is performed enough times, for each cathode position the mean values will be plotted as a function of (a) detector temperature and (b) observation time. The data analysis will consist of performing a trend analysis on the various data series from the data reduction process in order to determine the potential hysteresis (if any) and to monitor the temporal development of the noise properties of the various detectors. ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). Data reduction and analysis will be supported at the Space Astronomy Lab at the University of Wisconsin in Madison. ------------------------------------------------------------------------------------ 11. Address Information Name: JOSEPH F. DOLAN Category: CON Institution: GSFC Address: CODE 681 City: GREENBELT State: MD Zip Code: 20771 Country: USA Telephone: (301) 286-6846 Telex (or e-mail): ------------------------------------------------------------------------------------ Name: MARK H. SLOVAK Category: CON Institution: UNIVERSITY OF WISCONSIN Address: 475 N. CHARTER STREET City: MADISON State: WI Zip Code: 53706 Country: USA Telephone: (608) 262-7542 Telex (or e-mail): ------------------------------------------------------------------------------------ Name: ROBERT C. BLESS Category: PI Institution: UNIVERSITY OF WISCONSIN Address: 475 N. CHARTER STREET City: MADISON State: WI Zip Code: 53706 Country: USA Telephone: (608) 262-1715 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 1379c [ 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 PMT-DARK-SKY DARK SKY POSITION FOR RA = 16H 27M 11S +/- .01", 2000.0 PMT DARKS DEC = -24D 19' 14" +/- .01" Comments: SELECT ONE OF THESE TARGETS AS THE PMT DARK SKY POINTING. ------------------------------------------------------------------------------------------------------------------------------------ 2 PMT-DARK-SKY RA = 3H 46.3M +/- 0.1M, 1975 -2 BARNARD 5 DEC = +32D 49' +/- 1', ------------------------------------------------------------------------------------------------------------------------------------ 3 PMT-DARK-SKY RA = 6H 5.9M +/- 0.1M, 1975 -3 BARNARD DEC = +19D 42' +/- 1', 227 ------------------------------------------------------------------------------------------------------------------------------------ 4 PMT-DARK-SKY RA = 16H 55.7M +/- 0.1M, 1975 -4 BARNARD DEC = -22D 42' +/- 1', 46 ------------------------------------------------------------------------------------------------------------------------------------ 5 PMT-DARK-SKY RA = 18H 31.3M +/- 0.1M, 1975 -5 BARNARD DEC = -9D 10' +/- 1', 100 ------------------------------------------------------------------------------------------------------------------------------------ 6 PMT-DARK-SKY RA = 21H 23.1M +/- 0.1M, 1975 -6 BARNARD DEC= +50D 6' +/- 1', 362 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 1379c [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 1 DEFINE DARK # SINGLE # # # 1 300S 1 DARK- IDT ------------------------------------------------------------------------------------------------------------------------------------ 5 DEFINE PMT-DARK- HSP/ SPLIT 1.0 F750W/ DATA-FORMAT=ALL 1 300S 1 DARK TIME DARK- SKY PMT/ F320N SAMPLE-TIME=0.1 SEQ 5-6 PMT VIS ANALOG-SCALE=10 Comments: SAMPLE PMT DARK CURRENT AT NOMINAL HV ------------------------------------------------------------------------------------------------------------------------------------ 6 ^ ^ ^ ^ ^ ^ DATA-FORMAT=ALL ^ ^ ^ SAMPLE-TIME=0.1 ANALOG-SCALE=10 PMT-HV-GAIN=OFF Comments: SAMPLE PMT DARK CURRENT WITH HIGH VOLTAGE OFF. ------------------------------------------------------------------------------------------------------------------------------------ 6.5 DARK S/C DATA NONE REALTIME=CMD 1 5M 1 BEFORE 7 BY 12M +/ - 5M Comments: UPLINK REQUIRED FOR CONTINGENCY IN THE EVENT OF FAILURE IN HIGH VOLTAGE TEST (HSP1502) ------------------------------------------------------------------------------------------------------------------------------------ 7 USE HSP/ 1.0-A F355M DATA-FORMAT=ALL SEQ 7-7.3 NO GAP DARK- VIS SAMPLE-TIME=0.1 DARK TIME IDT ANALOG-SCALE=10 HV-GAIN=G1.0 Comments: SAMPLE VIS IDT. (H,V) = (2000, 1900) ------------------------------------------------------------------------------------------------------------------------------------ 7.1 USE HSP/ 0.4-B F355M DATA-FORMAT=ALL DARK TIME DARK- VIS SAMPLE-TIME=0.1 IDT ANALOG-SCALE=10 HV-GAIN=G1.0 Comments: SAMPLE VIS IDT. (H,V) = (3600, 1900) ------------------------------------------------------------------------------------------------------------------------------------ 7.2 USE HSP/ 0.4-C F160LP DATA-FORMAT=ALL DARK TIME DARK- VIS SAMPLE-TIME=0.1 IDT ANALOG-SCALE=10 HV-GAIN=G1.0 Comments: SAMPLE VIS IDT. (H,V) = (2000, 3000) ------------------------------------------------------------------------------------------------------------------------------------ 7.3 USE HSP/ 1.0-A F355M DATA-FORMAT=ALL DARK- VIS SAMPLE-TIME=0.1 IDT ANALOG-SCALE=10 HV-GAIN=OFF Comments: SAMPLE VIS IDT. (H,V) = (2000, 1900) HIGH VOLTAGE OFF POWER DOWN DETECTOR WHEN DONE ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 1379c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 8 USE HSP/ 1.0-A F240W DATA-FORMAT=ALL SEQ 8-8.3 NO GAP DARK- UV1 SAMPLE-TIME=0.1 DARK TIME IDT ANALOG-SCALE=10 HV-GAIN=G1.0 Comments: SAMPLE UV1 IDT. (H,V) = (2000, 1900) ------------------------------------------------------------------------------------------------------------------------------------ 8.1 USE HSP/ 0.4-B F240W DATA-FORMAT=ALL DARK TIME DARK- UV1 SAMPLE-TIME=0.1 IDT ANALOG-SCALE=10 HV-GAIN=G1.0 Comments: SAMPLE UV1 IDT. (H,V) = (3600, 1900) ------------------------------------------------------------------------------------------------------------------------------------ 8.2 USE HSP/ 0.4-C F140LP DATA-FORMAT=ALL DARK TIME DARK- UV1 SAMPLE-TIME=0.1 IDT ANALOG-SCALE=10 HV-GAIN=G1.0 Comments: SAMPLE UV1 IDT. (H,V) = (2000, 3000) ------------------------------------------------------------------------------------------------------------------------------------ 8.3 USE HSP/ 1.0-A F240W DATA-FORMAT=ALL DARK- UV1 SAMPLE-TIME=0.1 IDT ANALOG-SCALE=10 HV-GAIN=OFF Comments: SAMPLE UV1 IDT. (H,V) = (2000, 1900) HIGH VOLTAGE OFF POWER DOWN DETECTOR WHEN DONE ------------------------------------------------------------------------------------------------------------------------------------ 9 USE HSP/ 1.0-A F248M DATA-FORMAT=ALL SEQ 9-9.3 NO GAP DARK- UV2 SAMPLE-TIME=0.1 DARK TIME IDT ANALOG-SCALE=10 HV-GAIN=G1.0 Comments: SAMPLE UV2 IDT. (H,V) = (2000, 1900) ------------------------------------------------------------------------------------------------------------------------------------ 9.1 USE HSP/ 0.4-B F248M DATA-FORMAT=ALL DARK TIME DARK- UV2 SAMPLE-TIME=0.1 IDT ANALOG-SCALE=10 HV-GAIN=G1.0 Comments: SAMPLE UV2 IDT. (H,V) = (3600, 1900) ------------------------------------------------------------------------------------------------------------------------------------ 9.2 USE HSP/ 0.4-C F140LP DATA-FORMAT=ALL DARK TIME DARK- UV2 SAMPLE-TIME=0.1 IDT ANALOG-SCALE=10 HV-GAIN=G1.0 Comments: SAMPLE UV2 IDT. (H,V) = (2000, 3000) ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 1379c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 9.3 USE HSP/ 1.0-A F248M DATA-FORMAT=ALL DARK- UV2 SAMPLE-TIME=0.1 IDT ANALOG-SCALE=10 HV-GAIN=OFF Comments: SAMPLE UV2 IDT. (H,V) = (2000, 1900) HIGH VOLTAGE OFF POWER DOWN DETECTOR WHEN DONE ------------------------------------------------------------------------------------------------------------------------------------ 10 USE HSP/ POL90 F277M DATA-FORMAT=ALL SEQ 10-10.3 NO GAP DARK- POL SAMPLE-TIME=0.1 DARK TIME IDT ANALOG-SCALE=10 HV-GAIN=G1.0 Comments: SAMPLE POL IDT. (H,V) = (2000, 1900) ------------------------------------------------------------------------------------------------------------------------------------ 10.1 USE HSP/ POL45 F277M DATA-FORMAT=ALL DARK TIME DARK- POL SAMPLE-TIME=0.1 IDT ANALOG-SCALE=10 HV-GAIN=G1.0 Comments: SAMPLE POL IDT. (H,V) = (3600, 1900) ------------------------------------------------------------------------------------------------------------------------------------ 10.2 USE HSP/ POL90 F327M DATA-FORMAT=ALL DARK TIME DARK- POL SAMPLE-TIME=0.1 IDT ANALOG-SCALE=10 HV-GAIN=G1.0 Comments: SAMPLE POL IDT. (H,V) = (2000, 3000) ------------------------------------------------------------------------------------------------------------------------------------ 10.3 USE HSP/ POL90 F327M DATA-FORMAT=ALL DARK- POL SAMPLE-TIME=0.1 IDT ANALOG-SCALE=10 HV-GAIN=OFF Comments: SAMPLE POL IDT. (H,V) = (2000, 1900) HIGH VOLTAGE OFF POWER DOWN DETECTOR WHEN DONE ------------------------------------------------------------------------------------------------------------------------------------ 11 USE DARK- PMT Comments: SAMPLE PMT. POWER DOWN DETECTOR WHEN DONE ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 1379c [ 8] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations # HSP/PMT/VIS ^ S/C HSP/VIS HSP/UV1 HSP/UV2 HSP/POL ------------------------------------------------------------------------------------------------------------------------------------ Opmodes SINGLE SPLIT ^ DATA ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters DATA-FORMAT=ALL SAMPLE-TIME=0.1 ANALOG-SCALE=10 PMT-HV-GAIN=OFF REALTIME=CMD HV-GAIN=G1.0 ------------------------------------------------------------------------------------------------------------------------------------ Proposal for OV/HSP ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 2.00 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements DARK TIME; SEQ 5-6; BEFORE 7 BY 12M +/- 5M; SEQ 7-7.3 NO GAP; SEQ 8-8.3 NO GAP; SEQ 9-9.3 NO GAP; SEQ 10-10.3 NO GAP; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements # F750W/F320N ^ F355M F160LP F240W F140LP F248M F277M F327M ------------------------------------------------------------------------------------------------------------------------------------ Target Names PMT-DARK-SKY PMT-DARK-SKY-2 BARNARD 5 PMT-DARK-SKY-3 BARNARD 227 PMT-DARK-SKY-4 BARNARD 46 PMT-DARK-SKY-5 BARNARD 100 PMT-DARK-SKY-6 BARNARD 362 ------------------------------------------------------------------------------------------------------------------------------------