6366( 6) - 06/06/96 17:03 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6366 Version: 6 Check-in Date: 06-Jun-1996 16:58:16 1.Proposal Title: The Early Onset of Asymmetric Outflow During the Planetary Nebula Formation Process ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle INTERSTELLAR MEDIUM SNAP 6 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: SUSAN TRAMMELL THE ENRICO FERMI INSTITUTE CoI: Robert Goodrich Space Telescope Science Institute N ------------------------------------------------------------------------------------ 6. Abstract We propose to study early mass loss in the planetary nebula (PN) formation process using the high resolution imaging capabilities of HST. While tremendous progress has been made in understanding the late stages of PN formation, the details of the earliest phases of this metamorphosis are still vague. A knowledge of the characteristics of the mass loss occurring as a star leaves the asymptotic giant branch (AGB) is crucial to a complete picture of the PN development, since early mass loss is thought to determine the final shape of an object by confining the faster winds that occur later in the formation process. Unfortunately, there is little observational evidence that probes the distribution of this early ejecta. Is the final morphology of a PN imprinted at early times as suggested by the formation models? Fully developed PNe display a variety of morphologies ranging from round to bipolar. Based on the formation models we might expect material ejected early in the development of a PN to also exhibit a range of morphologies. Is this what we observe? We will directly address these questions by obtaining PC2 images of a sample of AGB/post-AGB stars. We have shown, using polarimetry, that the stars in this sample possess extended scattering envelopes that are spatially unresolved from the ground, but can be resolved using HST. These observations will reveal the morphology of the ejecta in the first stages of the PN formation process, thus testing the validity of the current models of PN formation. ------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 2] Observations Description ------------------------ We will obtain V and R band Planetary Camera observations for all 11 AGB/post- AGB stars. In addition, for sources that are bright enough in the blue will we obtain B band images. In a few cases, we will obtain images through narrow-band filters centered on emission lines that are thought to be formed in the extended shells around these stars (e.g. Na I D for QY Sge). We will use guide stars and fine lock tracking for these observations since we a concerned with obtaining the highest possible spatial resolution. We request the standard 12 month proprietary period for the data obtained for this project. The exposures will be short, designed to avoid saturation of the star, while providing a large enough signal-to-noise ratio (S/N) to detect the extended scattering envelopes around these stars. We will use a the gain of 14 e- per DN for these observations which gives a digital full well depth of 53,000 e-. We want to maximize the exposure time without saturating the stellar core. This means that the number of electrons collected in the peak pixel of the stellar point-spread function must be <= 53,000. Equation 6.1 in the WFPC2 Handbook gives the number of electrons, N_e, collected from a point source of apparent magnitude, V, in a given exposure time. Ne is the number of counts contained in the entire point- spread function (PSF). For our exposure time calculations we need to know the fraction, X, of the total counts contained in the peak pixel of the PSF. X can be estimated from the model PSF's given in Table 5.1 (assuming that the star is near the center of a pixel). The maximum exposure time is then given by t = (53,000 x X)/((2.5x10^11) x QT x 10^(-0.4(V + AB))) where QT is the dimensionless efficiency. The QT integrals for each filter are given in Table 6.2 and the V+AB values for various targets were calculated using the equation for the Oke system magnitude given in section 6 of the Handbook and values for the flux taken from ground-based spectroscopy. We can obtain images through all of the the passbands (including overhead time) for a given target in less than or equal to one orbit, making these objects excellent candidates for a snapshot program. RW LMi is the objects requiring the longest exposure times of all 11 sources. Given the exposure times, we need to calculate the S/N in the reflection nebula surrounding the star. Since we know the polarization of each object, we can put a lower limit on how much of the observed flux is scattered by the extended shell. We obtain a minimum scattered flux, F_s, by simply taking F_s = P x Ne where N_e is the count rate integrated over the PSF. Assuming that the scattered light falls into 8 x 8 pixels on the CCD (corresponding to our size estimate of 0.4"), we can estimate the S/N per pixel of the extended nebula. In all cases, the observation of a significant polarization (P > 1%) immediately implies adequate S/N in the extended reflection nebula, assuming HST resolves this region. Noise estimates include shot noise for the stars, readout noise, sky noise, dark current, and quantization noise, per the Handbook. Note that the PSF for the stellar image drops to < 1% three pixels distant from the stellar core, so that at the distances we expect to see the reflection nebulae, (> 5 pixels from the core) noise from the PSF will not be a significant factor. Exposure time estimates for the narrow-band images are based on the emission line fluxes from our spectropolarimetry. We have calculated the number of electrons expected to be recorded by the Planetary Camera CCD. Based on these expected collection rates and the total system throughput from the figures in section 8.2 of the WFPC2 Handbook, we have estimated exposure times for the appropriate narrow-band filters. Real Time Justification ----------------------- None. We have already obtained optical spectropolarimetry for all of the targets. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 3] Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 4] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 IRAS04296+34 STAR,G III-I RA=4H 32M 56.98S +/- J2000 B = 16.32 29 0.04S,DEC=34D 36' 12.47" +/- V = 14.14 0.5",PLATE-ID=003V R = 12.79 I = 11.96 B-V = 2.18 TYPE=G0IA 2 IRAS08005- STAR,F3-F9 RA=8H 2M 40.71S +/- 0.03S,DEC=- J2000 U = 13.65 2356 24D 4' 42.50" +/- 0.5",PLATE- B = 12.88 ID=04NO V = 11.55 R = 10.56 I = 9.94 B-V = 1.33 TYPE=F5IA 3 IY-HYA STAR,CARBON STAR,LONG RA=10H 17M 00.51S +/- 0.04S, J2000 V = 15.24 PERIOD VARIABLE DEC=-14D 39' 30.20" +/- 0.5", R = 10.76 PLATE-ID=00OH I = 9.47 TYPE=C 4 RW-LMI STAR,CARBON STAR,LONG RA=10H 16M 2.44S +/- J2000 B = 17.10 PERIOD VARIABLE 0.04S,DEC=30D 34' 25.08" +/- V = 16.11 0.5",PLATE-ID=021H R = 13.06 I = 11.88 B-V = 0.99 TYPE=C 5 BD-20D3283 STAR,CARBON STAR,LONG RA=10H 51M 37.18S +/- 0.04S,DEC= J2000 B = 14.40 PERIOD VARIABLE -21D 15' .00" +/- 0.5",PLATE- V = 9.68 ID=05Y1 R = 6.61 I = 5.41 B-V = 4.72 TYPE=C 6 HD111166 STAR,LONG PERIOD RA=12H 47M 18.40S +/- J2000 B = 15.73 VARIABLE,R N OR S TYPES 0.03S,DEC=4D 8' 41.57" +/- V = 10.68 0.5",PLATE-ID=00ZX R = 8.46 I = 7.14 B-V = 5.05 TYPE=RPE 7 IRAS18095+27 STAR,F3-F9 RA=18H 11M 30.64S +/- J2000 U = 13.84 04 0.04S,DEC=27D 5' 16.20" +/- B = 11.35 0.5",PLATE-ID=01KE V = 10.46 R = 9.73 I = 9.25 B-V = 0.89 TYPE=F3IB 8 HD179821 STAR,G III-I RA=19H 13M 58.69S +/- J2000 U = 10.81 0.03S,DEC=00D 7' 30.96" +/- B = 9.89 0.5",PLATE-ID=050U V = 7.96 R = 7.15 I = 6.66 B-V = 1.93 TYPE=G5IA 6366( 6) - 06/06/96 17:03 - [ 5] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 9 V1027-CYG STAR,G III-I RA=20H 2M 27.39S +/- J2000 U = 13.3 0.03S,DEC=30D 4' 25.62" +/- B = 11.28 0.5",PLATE-ID=02UC V = 8.49 R = 7.13 I = 6.50 B-V = 2.79 TYPE=G7IAB 10 QY-SGE STAR,G III-I RA=20H 7M 54.60S +/- J2000 U = 14.35 0.03S,DEC=18D 42' 54.87" +/- B = 13.67 0.5",PLATE-ID=02UQ V = 12.64 R = 12.07 I = 11.66 B-V = 1.03 TYPE=G0IB 11 V1899-CYG STAR,LONG PERIOD RA=21H 4M 14.55S +/- J2000 V = 17.18 VARIABLE,CARBON STAR 0.03S,DEC=53D 21' 5.28" +/- R = 14.57 0.5",PLATE-ID=003M I = 13.29 TYPE=C 12 HD46703 STAR,F3-F9 RA=6H 37M 52.40S +/- 0.04S, J2000 B = 9.48 DEC=+53D 31' 01.82" +/- 0.5", V = 9.11 PLATE-ID=00VO R = 8.74 I = 8.54 TYPE=F7IVWE 13 HD112374 STAR,F3-F9 RA=12H 56M 30.10S +/- 0.04S, J2000 B = 7.92 DEC=-26D 27' 36.50" +/- 0.5", V = 7.35 PLATE-ID=04LL R = 7.04 I = 6.88 TYPE=F3IA 6366( 6) - 06/06/96 17:03 - [ 6] 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 IRAS04296+3 WFPC2 IMAGE PC1 F439W ATD-GAIN=15 2 400 S MAX DUR 429 ------------------------------------------------------------------------------------------------------------------------------------ 2 IRAS04296+3 WFPC2 IMAGE PC1 F555W ATD-GAIN=15 2 14 S MAX DUR 429 ------------------------------------------------------------------------------------------------------------------------------------ 3 IRAS04296+3 WFPC2 IMAGE PC1 F675W ATD-GAIN=15 2 5 S MAX DUR 429 ------------------------------------------------------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 7] Visit: 02 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 ------------------------------------------------------------------------------------------------------------------------------------ 10 IRAS08005-2 WFPC2 IMAGE PC1 F439W ATD-GAIN=15 3 23 S MAX DUR 356 ------------------------------------------------------------------------------------------------------------------------------------ 11 IRAS08005-2 WFPC2 IMAGE PC1 F439W ATD-GAIN=15 1 5 S MAX DUR 356 ------------------------------------------------------------------------------------------------------------------------------------ 12 IRAS08005-2 WFPC2 IMAGE PC1 F555W ATD-GAIN=15 3 1.2 S MAX DUR MIN DUR 0.23S 356 ------------------------------------------------------------------------------------------------------------------------------------ 13 IRAS08005-2 WFPC2 IMAGE PC1 F675W ATD-GAIN=15 3 0.7 S MAX DUR MIN DUR 0.23S 356 ------------------------------------------------------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 8] Visit: 03 Visit Requirements: ON HOLD On Hold Comments: Select 1 of visits 3, 12, or 13 in that preference order. Select the visit that does not result in a duplication with another observing program. 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 IY-HYA WFPC2 IMAGE PC1 F555W ATD-GAIN=15 3 35 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 2 IY-HYA WFPC2 IMAGE PC1 F555W ATD-GAIN=15 1 5 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 3 IY-HYA WFPC2 IMAGE PC1 F675W ATD-GAIN=15 4 2.3 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 4 IY-HYA WFPC2 IMAGE PC1 F675W ATD-GAIN=15 1 1 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 9] 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 ------------------------------------------------------------------------------------------------------------------------------------ 30 RW-LMI WFPC2 IMAGE PC1 F439W ATD-GAIN=15 1 800 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 31 RW-LMI WFPC2 IMAGE PC1 F555W ATD-GAIN=15 2 80 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 32 RW-LMI WFPC2 IMAGE PC1 F675W ATD-GAIN=15 2 10 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 10] Visit: 05 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 ------------------------------------------------------------------------------------------------------------------------------------ 40 BD-20D3283 WFPC2 IMAGE PC1 F439W ATD-GAIN=15 2 160 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 41 BD-20D3283 WFPC2 IMAGE PC1 F439W ATD-GAIN=15 1 30 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 42 BD-20D3283 WFPC2 IMAGE PC1 F555W ATD-GAIN=15 3 0.23 S MAX DUR MIN DUR ------------------------------------------------------------------------------------------------------------------------------------ 43 BD-20D3283 WFPC2 IMAGE PC1 F675W ATD-GAIN=15 3 0.11 S MAX DUR MIN DUR ------------------------------------------------------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 11] Visit: 06 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 ------------------------------------------------------------------------------------------------------------------------------------ 50 HD111166 WFPC2 IMAGE PC1 F439W ATD-GAIN=15 1 600 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 51 HD111166 WFPC2 IMAGE PC1 F555W ATD-GAIN=15 3 0.6 S MAX DUR MIN DUR 0.23S ------------------------------------------------------------------------------------------------------------------------------------ 52 HD111166 WFPC2 IMAGE PC1 F675W ATD-GAIN=15 3 0.11 S MAX DUR MIN DUR ------------------------------------------------------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 12] Visit: 07 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 ------------------------------------------------------------------------------------------------------------------------------------ 60 IRAS18095+2 WFPC2 IMAGE PC1 F439W ATD-GAIN=15 3 5 S MAX DUR 704 ------------------------------------------------------------------------------------------------------------------------------------ 61 IRAS18095+2 WFPC2 IMAGE PC1 F439W ATD-GAIN=15 1 1 S MAX DUR 704 ------------------------------------------------------------------------------------------------------------------------------------ 62 IRAS18095+2 WFPC2 IMAGE PC1 F555W ATD-GAIN=15 4 0.40 S MAX DUR MIN DUR 0.23S 704 ------------------------------------------------------------------------------------------------------------------------------------ 63 IRAS18095+2 WFPC2 IMAGE PC1 F675W ATD-GAIN=15 4 0.30 S MAX DUR MIN DUR 0.23S 704 ------------------------------------------------------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 13] Visit: 08 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 ------------------------------------------------------------------------------------------------------------------------------------ 70 HD179821 WFPC2 IMAGE PC1 F439W ATD-GAIN=15 3 1.60 S MAX DUR MIN DUR 0.23S ------------------------------------------------------------------------------------------------------------------------------------ 71 HD179821 WFPC2 IMAGE PC1 F555W ATD-GAIN=15 4 0.11 S MAX DUR MIN DUR ------------------------------------------------------------------------------------------------------------------------------------ 72 HD179821 WFPC2 IMAGE PC1 F675W ATD-GAIN=15 4 0.11 S MAX DUR MIN DUR ------------------------------------------------------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 14] Visit: 09 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 ------------------------------------------------------------------------------------------------------------------------------------ 80 V1027-CYG WFPC2 IMAGE PC1 F439W ATD-GAIN=15 4 6.0 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 81 V1027-CYG WFPC2 IMAGE PC1 F439W ATD-GAIN=15 1 1.0 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 82 V1027-CYG WFPC2 IMAGE PC1 F555W ATD-GAIN=15 4 0.11 S MAX DUR MIN DUR ------------------------------------------------------------------------------------------------------------------------------------ 83 V1027-CYG WFPC2 IMAGE PC1 F675W ATD-GAIN=15 4 0.11 S MAX DUR MIN DUR ------------------------------------------------------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 15] Visit: 10 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 ------------------------------------------------------------------------------------------------------------------------------------ 90 QY-SGE WFPC2 IMAGE PC1 F439W ATD-GAIN=15 2 40 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 91 QY-SGE WFPC2 IMAGE PC1 F439W ATD-GAIN=15 1 5 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 92 QY-SGE WFPC2 IMAGE PC1 F555W ATD-GAIN=15 2 3.5 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 93 QY-SGE WFPC2 IMAGE PC1 F675W ATD-GAIN=15 2 2.6 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 94 QY-SGE WFPC2 IMAGE PC1 F588N ATD-GAIN=7 1 500 S ------------------------------------------------------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 16] Visit: 11 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 ------------------------------------------------------------------------------------------------------------------------------------ 100 V1899-CYG WFPC2 IMAGE PC1 F555W ATD-GAIN=15 3 230 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 101 V1899-CYG WFPC2 IMAGE PC1 F675W ATD-GAIN=15 3 35 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 102 V1899-CYG WFPC2 IMAGE PC1 F675W ATD-GAIN=15 1 5 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 17] Visit: 12 Visit Requirements: ON HOLD On Hold Comments: Select 1 of visits 3, 12, or 13 in that preference order. Select the visit that does not result in a duplication with another observing program. 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 ------------------------------------------------------------------------------------------------------------------------------------ 10 HD46703 WFPC2 IMAGE PC1 F439W ATD-GAIN=15 4 0.8 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 11 HD46703 WFPC2 IMAGE PC1 F555W ATD-GAIN=15 4 0.14 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 12 HD46703 WFPC2 IMAGE PC1 F675W ATD-GAIN=15 4 0.14 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 18] Visit: 13 Visit Requirements: ON HOLD On Hold Comments: Select 1 of visits 3, 12, or 13 in that preference order. Select the visit that does not result in a duplication with another observing program. 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 ------------------------------------------------------------------------------------------------------------------------------------ 20 HD112374 WFPC2 IMAGE PC1 F439W ATD-GAIN=15 4 0.2 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 21 HD112374 WFPC2 IMAGE PC1 F555W ATD-GAIN=15 4 0.11 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 22 HD112374 WFPC2 IMAGE PC1 F675W ATD-GAIN=15 4 0.11 S MAX DUR ------------------------------------------------------------------------------------------------------------------------------------ 6366( 6) - 06/06/96 17:03 - [ 19] Summary Form for Proposal 6366 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ATD-GAIN=15 ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category SNAP ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category INTERSTELLAR MEDIUM ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements MAX DUR MAX DUR MIN DUR 0.23S ON HOLD MAX DUR MIN DUR ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F439W F555W F675W F588N ------------------------------------------------------------------------------------------------------------------------------------ Target Names IRAS04296+3429 IRAS08005-2356 IY-HYA RW-LMI BD-20D3283 HD111166 IRAS18095+2704 HD179821 V1027-CYG QY-SGE V1899-CYG HD46703 HD112374 ------------------------------------------------------------------------------------------------------------------------------------