6584( 11) - 10/08/96 15:42 - [ 0] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6584 Version: 11 Check-in Date: 08-Oct-1996 15:36:24 1.Proposal Title: Interaction of Supernovae with Circumstellar Material ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle INTERSTELLAR MEDIUM GO 6 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: ALEX FILIPPENKO UNIVERSITY OF CALIFORNIA CoI: Claes Fransson Stockholm Observatory N CoI: Robert Kirshner Harvard University N CoI: Bruno Leibundgut European Southern Observatory N CoI: Douglas Leonard University of California, Berkeley N CoI: Thomas Matheson University of California, Berkeley N CoI: Schuyler Van Dyk University of California, Berkeley N CoI: Roger Chevalier University of Virginia N CoI: Robert Fesen Dartmouth College N ------------------------------------------------------------------------------------ 6. Abstract The interaction of supernova (SN) ejecta with circumstellar material supplied by the wind of the evolved progenitor star can sometimes provide enough energy to sustain the SN luminosity for several decades. Existing observations of certain Type II SNe strongly favor such an interpretation over other possible late-time energy sources. Some peculiar SNe II have such dense circumstellar winds that interaction with the ejecta substantially alters their observed properties even at early times. The UV spectrum is a powerful diagnostic for probing the conditions in the shocked outer ejecta and circumstellar gas. We propose to observe two old SNs (1979C and 1980K) whose optical and radio characteristics reveal them to be especially well suited for an investigation of the interaction between ejecta and circumstellar gas. We will also observe a more recent SN II (1995N) showing strong evidence for early interaction with circumstellar gas. The fluxes and intensity ratios of UV emission lines will be used to test theoretical models of the interaction. In addition, we will obtain UBVRI and HAlpha images of SN 1979C to obtain a precise offset from an offset star (for the subsequent FOS spectroscopy), to determine background contamination corrections for previous photometry, to measure accurate current magnitudes, to search for light echoes, and to investigate the stellar population and structure of H II regions in its vicinity. The HST observations will shed light on differences among the 3 objects, as well as on the mass-loss histories of their progenitors. ------------------------------------------------------------------------------------ Observations Description ------------------------ (1) We wish to obtain broad-band "optical" (UBVRI) images of SN 1979C and its surroundings, as well as a narrow-band H-alpha image. The use of five standard bands (WFPC2 Handbook, p. 24) will permit direct comparisons with other HST observations. To achieve high spatial resolution, the PC is requested. The continuum V magnitude of SN 1979C is about 24, but we should go a magnitude deeper in case it fades and to study the surrounding stellar population. We would like to reach relatively high signal-to-noise ratios (SNRs), at least 20 in VRI and 15 in UB, for sufficiently accurate measurement of magnitudes and colors. We will remove cosmic rays by comparing pairs of exposures made through the same filter. Consider the F814W (I) filter. From the WFPC2 Handbook, we find that QT d\\lambda/\\lambda = 0.01799. Using eq. 6.1 in the Handbook, we calculate a count rate of 0.45 s^{-1}. The sky background is small by comparison (29.2 mag/pixel, or about 26.7 mag over the compact core of 10 pixels). We find that SNR = 20 is achieved in about 900~s. (Note that the readout noise, 5 electrons/pixel, is negligible.) Similarly, we find that 800~s, 600~s, 1900~s, and 2300~s are required with the F675W (R), F555W (V), F439W (B), and F336W (U) filters, respectively. The narrow-band H-alpha image will be obtained through the F658N filter. At the redshift of NGC 4321 (cz = 1600 km/s), the observed wavelength of H-alpha is 6598~\\AA, well within the flat part of the transmission profile (WFPC2 Handbook, p. 104). The continuum will be subtracted from the narrow-band image by appropriately scaling the broad-band images. From our ground-based images, the H$\\alpha$ flux is about 5 x 10^{-15} ergs/s/cm^2. If this is spread over about 3 square arcsec we have 0.34 x 10^{-17} ergs/s/cm^2/pixel, since each PC2 pixel subtends 0.002 square arcsec. Averaged over the effective bandpass of the filter, we have 1.8 x 10^{- 19} ergs/s/cm^2/pixel/\\AA, which corresponds to about 25.2 mag/pixel. Using the estimated transmission of the filter and the CCD efficiency, we calculate that about 20 electrons will be detected in 65 minutes (1.5 orbits), yielding SNR = 3 per pixel. (2) We wish to obtain UV FOS spectra of all three SNe. The expected fluxes of UV emission lines were calculated according to the predictions of CF94 (power-law and RSG models), in each case using the known H- alpha or H-beta flux (e.g., Fesen \\& Matonick 1994) and extinction. Extrapolations into Cycle 6 were based on previous observations of SN 1995N, and on the observed light curves of SNe 1979C and 1980K. Ideally, we would obtain spectra of each object with the high-resolution UV gratings (G130H, G190H, G270H, G400H), in order to get accurate emission-line profiles. However, calculations show that in the UV, the signal will be substantially less than the dark current, even with the low-resolution G160L grating in two of the objects. Thus, we must compromise. For each of SN 1979C and SN 1980K, we request 5 orbits: 1 for target acquisition, 3 with G270H, and 1 with G400H. For SN 1995N, we request 7 orbits: 1 for target acquisition, 3 with G160L, 2 with G270H, and 1 with G400H. All exposures except G160L will be done with the red arm of the FOS. The G400H spectra are useful for lines in the near-UV (3200-- 4000~\\AA), and to help tie our ground-based Keck and Lick spectra (\\lambda > 4000~\\AA) to the HST data; moreover, they require only a small fraction of time relative to the UV settings. The total number of orbits for FOS spectroscopy is 17. Here we give a sample calculation of the exposure time. For SN 1980K we have a measured flux density (f_\\lambda) of 3 (in units of 10^{- 17} erg s^{-1} cm^{-2} \\AA^{-1}) at 2400~\\AA, and this may decrease to 1 by a year from now. From the Cycle 6 FOS Handbook, we find that the throughput (T_\\lambda) of the 0.86^{\\prime\\prime} aperture is 0.91, and the inverse sensitivity (S_\\lambda) at 2400~\\AA\\ is 2.82 x 10^{-15} erg s^{-1} cm^{-2} count^{-1}. Thus, the expected count rate (N_\\lambda) is f_\\lambda T_\\lambda/S_\\lambda = 0.00327 counts s^{-1} diode^{-1}, less than the dark current (D) of 0.01 counts s^{-1} diode^{-1}. The required integration time is given by t = (SNR)^2 (N_\\lambda +D)/N_\\lambda^2, which in this case is 8000 sec (3 orbits) for SNR = 2.5 per diode. (Note that the emission lines in which we are interested will have higher SNRs shows that with the G400H grating, a total integration time of 2700 sec (1 orbit) will be sufficient. Note that our original proposal called for observations of SN 1994Y instead of SN 1980K. However, our Cycle 5 spectrum of SN 1980K was not successful due to an incorrect offset. Since SN 1980K has higher priority than SN 1994Y, we requested (and received) a change of targets. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- (1) Visit 2, the WFPC2 imaging of SN 1979C-CLUSTER (target 3), must be done at least 2 months prior to the FOS spectroscopy, since we need to measure a more accurate offset from the offset star (target 4) to SN1979C (target 5) using these images. THUS, THE IMAGING OBSERVATIONS OF SN1979C (VISIT 2) MUST BE SCHEDULED AS SOON AS POSSIBLE, PREFERABLY EVEN BEFORE THE OFFICIAL BEGINNING OF CYCLE 6 (JULY 1). The three main windows of opportunity are (a) a week in April 1996, (b) May/June 1996, and (c) July 1996. I would prefer to have the imaging observations scheduled either in April or in May, since the follow-up FOS observations could then be performed in July 1996. Otherwise, we have to wait for November 1996 to obtain the FOS spectra, and if something goes wrong (e.g., HST safing event, or a target of opportunity), then there's little chance to re -schedule for January 1997 (the last possible window for the FOS spectra). NOTE: For LRP and scheduling purposes, the ORIENT has been set to 105.0D which means mid-late July. - Ray Lucas - 6/22-23/96 (2) Note that the offset star (SN1979C-OFFSET, target 4) is at PA = 305 deg with respect to SN1979C-CLUSTER (that is, west and north of SN1979C-CLUSTER). If SN1979C-CLUSTER (target 3) is positioned in the geometric center of the PC chip, I want to BE SURE that SN1979C-OFFSET (target 4) lands somewhere on one of the WFC chips. Thus, I have specified the visit requirement "ORIENT 65D TO 185D" for VISIT 2. This has a midpoint of 125 deg, or 180 deg from the PA of SN1979C-OFFSET with respect to SN1979C-CLUSTER (305D). Looking at pages 7-11, 7-12, and 9-14 in the Phase II Proposal Instructions, I think this is correct, but please check it for me. Thanks has been placed in the program for LRP and scheduling purposes. - Ray Lucas - 6/22-23/96. (3) Note that SN1979C-OFFSET (target 4) is quite far (80") from SN1979C (target 5). I want to offset from target 4 to target 5 and then get an FOS spectrum of target 5. If it turns out (during scheduling) that the guide stars used for target 4 are no longer in the pickles when HST is pointing at target 5, PLEASE CONTACT ME and I will choose a different (closer) offset star. However, all of the other candidate offset stars are VERY faint, and would require 2 to 3 orbits of acquisition time (out of 5 orbits allocated to this Visit (target 4) if possible. ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 6584( 11) - 10/08/96 15:42 - [ 1] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SN1995N- STAR, G V-IV RA=14H 49M 29.275S +/- 0.05S, 2000 V = 17.45+/-0.2 OFFSET DEC=-10D 10' 36.00" +/- 0.5", B-V = 0.58+/-0.2 PLATE-ID=04MV R-I = 0.68+/-0.2 Comments: G5 OFFSET STAR FOR SN1995N. These coordinates are GASP coords but the seconds of time and arc have been changed slightly to still make the cross-hairs line up properly with the target. The centroided coords appeared to be slightly off, and the GASP coords were measured from the same GS Plate as the finder charts, so the reference frame is the same. The coords have just been tweaked very slightly ( from 29.314s to 29.275s and from 36.14" to 36.00" ). 2 SN1995N EXT-STAR, SUPERNOVA RA-OFF = -0.942S +/- 0.01S, DEC- 2000 V = V = 22+/-1 TYPE II OFF = +22.11" +/- 0.15", FROM 1, +1800 B-V = 0.5+/-0.5 PLATE-ID=04MV F-LINE(2800)=2+/-1e-15 W-LINE(2800)=4+/-1 Comments: MAGNITUDES AND COLORS VERY APPROXIMATE; OBJECT SLOWLY FADING WITH TIME. PLATE-ID is merely the one from the GASP finder chart which was the best one to use in terms of GSSS plate x,y. Position was not measured from this plate, however. 3 SN1979C- EXT-STAR, SUPERNOVA RA=12H 22M 58.63S +/- 0.1S, 2000 V = V = 24+/-1 CLUSTER TYPE II DEC=+15D 47' 51.7" +/- 1.0", +1600 B-V = 0.5+/-0.5 PLATE-ID=00G0 Comments: MAGNITUDES AND COLORS VERY APPROXIMATE; OBJECT SLOWLY FADING WITH TIME. PLATE-ID is merely the one from the GASP finder chart which was the best one to use in terms of GSSS plate x,y. Position was not measured from this plate, however. The actual science target ( Target 5 = SN1979C ) is somewhere in this cluster and will have to be identified by comparing all the EARLY ACQ images in the different filters, hence ALL the imaging is a prerequisite as EARLY ACQ for the spectroscopy. They are also all required to be contemporaneous since SN remnant is fading over time. - Ray Lucas - 6/22-23/96. 4 SN1979C- STAR, G V-IV RA=12H 22M 54.05S +/- 0.02S, 2000 V = 17.8+/-0.3 OFFSET DEC=+15D 48' 40.20" +/- 0.3", B-V = 0.8+/-0.1 PLATE-ID=00G0 Comments: Further flux info includes U-B=0.2 +/- 0.1 and B-I = 2.6 +/- 0.1. These are based on EARLY ACQ results. G5 OFFSET STAR FOR SN1979C. IF THIS OFFSET STAR ENDS UP BEING TOO FAR AWAY FROM THE TARGET (SUCH THAT THE GUIDE STARS ARE LOST), I WILL CHOOSE A DIFFERENT OFFSET STAR --- BUT ALL OF THEM ARE MUCH FAINTER THAN THIS ONE. SEE "ADDITIONAL COMMENTS" SECTION FOR MORE DETAILS. PLATE-ID is the one from the GASP finder chart and EARLY ACQ. The coords have been updated by the PI based on the results of the EARLY ACQ imaging. 6584( 11) - 10/08/96 15:42 - [ 2] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 5 SN1979C EXT-STAR, SUPERNOVA RA-OFF = +4.661S +/- 0.01S, DEC- 2000 V = V = 24+/-1 TYPE II OFF = -47.79" +/- 0.2", FROM 4, +1600 B-V = 0.5+/-0.5 PLATE-ID=00G0 F-LINE(2800)=2+/-1e-15 W-LINE(2800)=4+/-1 Comments: MAGNITUDES AND FLUXES VERY APPROXIMATE; OBJECT SLOWLY FADING WITH TIME. PLATE-ID is the one from the GASP finder chart which was the best one to use in terms of GSSS plate x,y and it is also the one from which the EARLY ACQ guide stars came. These target offset coords are the ones measured by the PI from the EARLY ACQ images. 6 SN1980K- STAR, K V-IV RA=20H 35M 30.87S +/- 0.05S, 2000 V = 18.19+/-0.05 OFFSET DEC=+60D 06' 20.9" +/- 0.5", B-V = 1.09+/-0.03 PLATE-ID=02RK Comments: K3 OFFSET STAR FOR SN1980K. PLATE-ID is merely the one from the GASP finder chart which was the best one to use in terms of GSSS plate x,y. Position was not measured from this plate, however. 7 SN1980K EXT-STAR, SUPERNOVA RA-OFF = -0.770S +/- 0.01S, DEC- 2000 V = +50 V = 24+/-1 TYPE II OFF = +3.024" +/- 0.05", FROM 6, B-V = 0.5+/-0.5 PLATE-ID=02RK F-LINE(2800)=2+/-1e-15 W-LINE(2800)=4+/-1 Comments: MAGNITUDES AND FLUXES VERY APPROXIMATE; OBJECT SLOWLY FADING WITH TIME. PLATE-ID is merely the one from the GASP finder chart which was the best one to use in terms of GSSS plate x,y. Position was not measured from this plate, however. 6584( 11) - 10/08/96 15:42 - [ 3] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN1995N-OFF FOS/RD ACQ/BIN 4.3 MIRROR 1 45 S ONBOARD ACQ FOR 2 SET ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 SN1995N-OFF FOS/RD ACQ/PEA 0.25-PA MIRROR TYPE=UP,SEARCH-SIZE-X=5, 1 6 S ONBOARD ACQ FOR 3-5 SET K IR-A SEARCH-SIZE-Y=5,SCAN-STEP-X=0.12, SCAN-STEP-Y=0.12,STEP-PATT=SINGLE Comments: NEED TO OFFSET FROM THIS STAR TO THE TARGET. ------------------------------------------------------------------------------------------------------------------------------------ 3 SN1995N FOS/RD ACCUM 1.0-PAI G400H STEP-PATT=SINGLE 1 48 M EXPAND R-A ------------------------------------------------------------------------------------------------------------------------------------ 4 SN1995N FOS/RD ACCUM 1.0-PAI G270H STEP-PATT=SINGLE 1 80 M EXPAND R-A ------------------------------------------------------------------------------------------------------------------------------------ 5 SN1995N FOS/BL ACCUM 1.0-PAI G160L STEP-PATT=SINGLE 1 116 M R-A ------------------------------------------------------------------------------------------------------------------------------------ 6584( 11) - 10/08/96 15:42 - [ 4] Visit: 02 Visit Requirements: ORIENT 105.0D TO 105.0D On Hold Comments: Additional Comments: THIS VISIT NEEDS TO BE DONE AT LEAST 2 MONTHS BEFORE VISIT 3, SO THAT OFFSET USED IN VISIT 3 CAN BE DETERMINED MORE ACCURATELY. ALSO, I WANT THE OFFSET STAR, SN1979C-OFFSET (TARGET 4), WHICH IS AT PA = 305D RELATIVE TO SN1979C-CLUSTER, TO FALL SOMEWHERE ON A WFC CHIP; HENCE THE "ORIENT 65D TO 185D" VISIT REQUIREMENT (WHICH HAS A MIDPOINT OF 125D, OR 180D FROM THE PA OF SN1979C-OFFSET). SEE "ADDITIONAL COMMENTS" SECTION FOR MORE DETAILS. NOTE: ORIENT WAS FIXED AT 105.0D FOR SCHEDULING PURPOSES BY RAY LUCAS ON 6/22-23/96. SEE ALSO TARGET 3 COMMENTS. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN1979C-CLU WFPC2 IMAGE PC1-FIX F439W 1 2400 S EXPAND MAX DUR 130% STER ------------------------------------------------------------------------------------------------------------------------------------ 2 SN1979C-CLU WFPC2 IMAGE PC1-FIX F336W CR-TOLERANCE=0.1 1 2600 S EXPAND MAX DUR 130% STER ------------------------------------------------------------------------------------------------------------------------------------ 3 SN1979C-CLU WFPC2 IMAGE PC1-FIX F814W 1 10 S STER Comments: THIS SHORT EXPOSURE WILL BE USED TO DETERMINE THE CENTROID OF THE BRIGHT OFFSET STAR, SN1979C-OFFSET, IF THE OTHERS ARE SATURATED ------------------------------------------------------------------------------------------------------------------------------------ 4 SN1979C-CLU WFPC2 IMAGE PC1-FIX F814W 1 1200 S STER ------------------------------------------------------------------------------------------------------------------------------------ 5 SN1979C-CLU WFPC2 IMAGE PC1-FIX F555W 1 800 S EXPAND MAX DUR 130% STER ------------------------------------------------------------------------------------------------------------------------------------ 6 SN1979C-CLU WFPC2 IMAGE PC1-FIX F675W 1 1000 S STER ------------------------------------------------------------------------------------------------------------------------------------ 7 SN1979C-CLU WFPC2 IMAGE PC1-FIX F658N CR-SPLIT=NO 1 1200 S EXPAND MAX DUR 130% STER ------------------------------------------------------------------------------------------------------------------------------------ 8 SN1979C-CLU WFPC2 IMAGE PC1-FIX F658N 1 2600 S EXPAND MAX DUR 130% STER ------------------------------------------------------------------------------------------------------------------------------------ 6584( 11) - 10/08/96 15:42 - [ 5] Visit: 03 Visit Requirements: AFTER 2 BY 60D TO 200D On Hold Comments: Additional Comments: THIS VISIT SHOULD BE DONE AT LEAST 60 DAYS AFTER VISIT 2, BUT BEFORE THE HST SERVICING MISSION (SINCE IT IS AN FOS OBSERVATION). SEE "ADDITIONAL COMMENTS" SECTION FOR MORE DETAILS. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN1979C-OFF FOS/RD ACQ/BIN 4.3 MIRROR 1 46 S ONBOARD ACQ FOR 2 SET ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 SN1979C-OFF FOS/RD ACQ/PEA 0.3 MIRROR TYPE=UP,SEARCH-SIZE-X=5, 1 9 S ONBOARD ACQ FOR 3-4 SET K SEARCH-SIZE-Y=5,SCAN-STEP-X=0.11, SCAN-STEP-Y=0.11 Comments: NEED TO OFFSET FROM THIS STAR TO THE TARGET. ------------------------------------------------------------------------------------------------------------------------------------ 3 SN1979C FOS/RD ACCUM 1.0 G400H 1 50 M END ORBIT ------------------------------------------------------------------------------------------------------------------------------------ 4 SN1979C FOS/RD ACCUM 1.0 G270H 1 120 M ------------------------------------------------------------------------------------------------------------------------------------ 6584( 11) - 10/08/96 15:42 - [ 6] Visit: 04 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN1980K-OFF FOS/RD ACQ/BIN 4.3 MIRROR 1 90 S ONBOARD ACQ FOR 2 SET ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 SN1980K-OFF FOS/RD ACQ/PEA 0.3 MIRROR TYPE=UP,SEARCH-SIZE-X=5, 1 15 S ONBOARD ACQ FOR 3-4 SET K SEARCH-SIZE-Y=5,SCAN-STEP-X=0.11, SCAN-STEP-Y=0.11 Comments: NEED TO OFFSET FROM THIS STAR TO THE TARGET. ------------------------------------------------------------------------------------------------------------------------------------ 3 SN1980K FOS/RD ACCUM 1.0 G400H 1 50 M END ORBIT ------------------------------------------------------------------------------------------------------------------------------------ 4 SN1980K FOS/RD ACCUM 1.0 G270H 1 130 M ------------------------------------------------------------------------------------------------------------------------------------ 6584( 11) - 10/08/96 15:42 - [ 7] Visit: 51 Visit Requirements: On Hold Comments: Additional Comments: HOPR Repeat due to GS loss of lock in Visit 01 execution. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SN1995N-OFF FOS/RD ACQ/BIN 4.3 MIRROR 1 45 S ONBOARD ACQ FOR 2 SET ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 SN1995N-OFF FOS/RD ACQ/PEA 0.25-PA MIRROR TYPE=UP,SEARCH-SIZE-X=5, 1 6 S ONBOARD ACQ FOR 3-5 SET K IR-A SEARCH-SIZE-Y=5,SCAN-STEP-X=0.12, SCAN-STEP-Y=0.12,STEP-PATT=SINGLE Comments: NEED TO OFFSET FROM THIS STAR TO THE TARGET. ------------------------------------------------------------------------------------------------------------------------------------ 3 SN1995N FOS/RD ACCUM 1.0-PAI G400H STEP-PATT=SINGLE 1 48 M EXPAND R-A ------------------------------------------------------------------------------------------------------------------------------------ 4 SN1995N FOS/RD ACCUM 1.0-PAI G270H STEP-PATT=SINGLE 1 80 M EXPAND R-A ------------------------------------------------------------------------------------------------------------------------------------ 5 SN1995N FOS/BL ACCUM 1.0-PAI G160L STEP-PATT=SINGLE 1 116 M R-A ------------------------------------------------------------------------------------------------------------------------------------ 6584( 11) - 10/08/96 15:42 - [ 8] Summary Form for Proposal 6584 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/RD FOS/BL WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/BINARY ACQ/PEAK ACCUM IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters TYPE=UP SEARCH-SIZE-X=5 SEARCH-SIZE-Y=5 SCAN-STEP-X=0.12 SCAN-STEP-Y=0.12 STEP-PATT=SINGLE CR-TOLERANCE=0.1 CR-SPLIT=NO SCAN-STEP-Y=0.11 SCAN-STEP-X=0.11 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category INTERSTELLAR MEDIUM ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 2 ONBOARD ACQ FOR 3-5 EXPAND ORIENT 105.0D TO 105.0D EXPAND MAX DUR 130% AFTER 2 BY 60D TO 200D ONBOARD ACQ FOR 3-4 END ORBIT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G400H G270H G160L F439W F336W F814W F555W F675W F658N ------------------------------------------------------------------------------------------------------------------------------------ Target Names SN1995N-OFFSET SN1995N SN1979C-CLUSTER SN1979C-OFFSET SN1979C SN1980K-OFFSET SN1980K ------------------------------------------------------------------------------------------------------------------------------------