6567( 18) - 07/11/96 15:39 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6567 Version: 18 Check-in Date: 11-Jul-1996 15:26:48 1.Proposal Title: Winds of massive stars in nearby galaxies: NGC6822 ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle HOT STARS GO 6 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: LUCIANA BIANCHI SPACE TELESCOPE SCIENCE INSTITUTE CoI: Salvatore Scuderi Space Telescope Science Institute N CoI: John Hutchings Dominion Astrophysical Observatory N CoI: Philip Massey National Optical Astronomy Observatories N CoI: Arturo Manchado-Torres Instituto de Astrofisica de Canarias N CoI: Ralph Bohlin Space Telescope Science Institute N CoI: Henny Lamers SRON -Utrecht N ------------------------------------------------------------------------------------ 6. Abstract In cycle 1 and cycle 4 we obtained FOS spectra of individual early type stars in M31 and M33. Combined with ground based data, the UV spectra were used to study stellar atmospheres and winds and compare wind velocities, mass loss rates, and abundances with similar galactic and LMC stars. We analysed the data by modeling line profiles with different methods, and made direct comparison between spectra of similar stars in different galaxies. Detailed study of hot star populations in galaxies outside the Milky Way provides a very important test of theories of stellar winds, star formation and evolution. Extinction properties of the ISM in the UV are also derived from the continuum distribution. We propose to extend these comparisons to the Local Group irregular galaxy NGC6822. Here the foreground extinction poses more severe limitations than in M31 and M33, but we have found 5 targets, from extensive optical work (Massey et al.1995), that are accessible to FOS/GHRS and will provide a small but highly valuable exploratory sample. Our ground based spectroscopy indicates that the metal lines in NGC6822 B-supergiants are significantly weaker than in SMC stars of similar spectral type and luminosity, which is inconsistent with the considerably higher than SMC-like metallicity indicated by HII region studies. HST spectroscopy in the UV provides valuable information about the metallicity. ------------------------------------------------------------------------------------ 6567( 18) - 07/11/96 15:39 - [ 2] Observations Description ------------------------ In order to fit the continuum and derive extinction, temperature, and luminosity, we require the range 1200- 3300Angstrom. This range will also contain all the wind and photospheric lines, below 1900Angstrom. We propose to observe with the GHRS+G140L, FOS/BL G190H and G270H. Using GHRS in the shorter wavelength range gives better resolution and efficiency just in the region where the strong wind line of NV 1240 (and CII, OIV) are poorly covered by the FOS-G130H. From recent figures, we find that GHRS is more sensitive by a factor from 6.4 to 1.3, from NV 1250 to CIV1550 (after degrading the data to the same resolution of the FOS/BL- G130H). FOS is more efficient for the longer wavelengths but also for the acquisition, which can then be offset to the GHRS with no additional time consuming target acquisition. We tested and successfully used this procedure during cycle 5. The targets are selected from the brightest and hottest stars known in this galaxy. We have optical CCD photometry and spectra. These data combined allow us to establish spectral type, luminosity class, magnitude, colors, and extinction, to compute exposure times. To model wind and photospheric line profiles we require a S/N in the 1200-1900Angstrom range not less than 15 per Angstrom. Each exposure may be split into several integrations that will be co-added to reach the required S/N. The exposure times are calculated on the basis of the ground based photometry, spectral type and extinction, and on the performance of the instruments estimated from our Cycle 4 observations and from the Cycle 6 instructions. In the G190H, and especially in the G270H range, we are mainly interested in the continuum distribution, therefore, in the interest of time, a S/N of 20 for continuum fitting in broad bands of 25Angstrom for the fainter stars is adequate. In this way, the exposures in the FOS G190H and G270H in most cases both fit into the first orbit with the acquisition and the readouts. The GHRS exposures require two orbits for each setting (two settings are needed to cover all the wind lines of interest: 1200- 1483Angstrom, and 1480- 1760Angstrom). Target acquisition has worked very well in the past, in the FOS 1'' aperture (binary acquisition) for the M31 and M33 stars. We chose well isolated objects, so we can use the GHRS large (1.7'') aperture. While our ground-based photometry and spectra identify our proposed program stars as good candidates, and guarantee safe acquisitions and spectrographic exposures, the errors on ground based photometry are quite large, from the point of view of the analysis. In fact, not only are the stars very faint, but hot stars are usually embedded in bright nebulosity. In the extraction of the point-like stellar flux from the surrounding diffuse emission, a greatest improvement can be achieved from HST imaging, resulting in a substantially better determination of some stellar quantities. This will also add a further, more conclusive, check on the isolation of the objects and will therefore provide extra safety on the HST spectroscopy execution. Thus, we also propose to obtain images to obtain accurate single star photometry, before the spectrographic observations are done. The entire area of all our program stars fits within only two WFPC2 images, so only two orbits are needed, to improve the science and make the observations much more efficient and the acquisitions more reliable. We request WFPC2 pointings at 2 positions that will include all our stars, obtaining short exposures with the U, B, V filters in each position. As a secondary goal, we request PC images parallel to the FOS spectra, with the F336W and V filters, to select UV-bright objects for follow up work from the ground (photometry and spectroscopy) as a prelude to possible additional HST work, and to complement the UBV photometry done from the ground, and proposed with HST in this cycle by one of us (PM) in a related proposal. The V-band is necessary for linking with the ground-based imaging, and to assess possible multiplicity of a large number of stars. In the UV, detection of even a small number of objects will be very important, as these can be the most massive ones. The high quality of the refurbished HST imaging will yield unprecedented information on these crowded fields, as demonstrated by our Cycle 4 parallel images taken recently. Our positions have been measured on CCD frames taken at KPNO (so with a recent epoch) and reduced in the GSC reference system. The targets are too faint to be measurable on the GASP frames. The fields are rather crowded, but we checked that in the cases proposed, there is no contamination by other target within 2 arcsec. This worked well in previous cycles in our M31 and M33 programs. Real Time Justification ----------------------- The WFPC2 images (non parallel) should be performed at a given roll angle to include all the targets in two pointings only. One of us (PM) has obtained extensive optical observations of stars in NGC6822, providing the identification of the most luminous and hottest stars and an accurate determination of sp.type, extinction, T_eff, L_bol. These results provided the basis for the presently proposed research. Also, we have planned WHT observations (high resolution, long slit) of the Balmer lines, to complement the UV FOS spectral line analysis, as we have done for our M31 and M33 targets, and described in the previous section. Complementary observations are also continuing at KPNO. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 6567( 18) - 07/11/96 15:39 - [ 3] Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 6567( 18) - 07/11/96 15:39 - [ 4] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC6822-OB15 EXT-STAR, B0-B2 III-I RA=19H 45M 13.35S +/- 1",DEC=- 2000. V = 18.08+/-0.2 -9 14D 45' 07.9" +/-1",PLATE- U-B = -0.78+/-.4 ID=00CN B-V = -0.02+/-.4 Comments: E(B-V)=0.17 2 NGC6822-OB13 EXT-STAR,Supergiant O RA=19H 45M 05.35S +/- 1", DEC=- 2000. V = 18.08+/-0.2 -9 14D 43' 12.3" +/-1",PLATE- U-B = -0.76+/-.4 ID=00CN B-V = -0.08+/-.4 Comments: E(B-V)=0.22, EARLY O 3 NGC6822-OB8F EXT-STAR, B0-B2 III-I RA=19H 44M 50.30S +/- 1", DEC=- 2000 V = 16.92+/-.2 -2 14D 42' 53.4" +/- 1", PLATE- U-B = -0.68+/-.4 ID=00CN B-V = -0.21+/-.4 Comments: B1.5III, E(B-V)=0.38 4 NGC6822-OB6- EXT-STAR,Supergiant O RA=19H 44M 49.41S +/- 1",DEC=- 2000 V = 18.11+/-0.3 16 14D 44' 03.9" +/- 1",PLATE- U-B = -0.82+/-.4 ID=00CN B-V = 0.10+/-.4 Comments: O9II, E(B-V)=0.37 5 NGC6822-OB7- EXT-STAR, B0-B2 III-I RA=19H 44M 49.12S +/- 1", DEC=- 2000. V = 17.50+/-0.03 15 14D 45' 26.6" +/- 1",PLATE- U-B = -0.73+/-.4 ID=00CN B-V = 0.16+/-.4 Comments: EARLY B, E(B-V)=0.35 6 NGC6822-OB6- EXT-CLUSTER, OB RA= 19H 45M 08S +/- 1", DEC=-14D 2000. V = 16+/-0.03 OB7 Association 44' 27.6"+/- 1", PLATE-ID=00CN B-V = 0.2+/-.4 Comments: CONTAINS TARGETS 1,2 7 NGC6822-OB13 EXT-CLUSTER, OB RA=19H 44M 49S+/- 1", DEC=-14D 2000 V = 16+/-0.03 -OB15-OB8 Association 44' 00"+/- 1", PLATE-ID=00CN B-V = 0.2+/-.4 Comments: CONTAINS TARGETS 3,4,5 6567( 18) - 07/11/96 15:39 - [ 5] TARGET LIST c)Generic Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Selection Criteria | Flux data No | Name | Description | | ------------------------------------------------------------------------------------------------------------------------------------ NGC6822-PAR1 EXT-CLUSTER, OB WILL BE THE WFPC2 POSITION DURING V = 16+/-0.03 Association FOS EXPOSURE IN VISIT 1 B-V = 0.2+/-.4 Comments: P <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< ARALLEL TO FOS OBSERVATION OF TARGET 1 ------------------------------------------------------------------------------------------------------------------------------------ NGC6822-PAR2 EXT-CLUSTER, OB WILL BE THE WFPC2 POSITION DURING V = 16+/-0.03 Association FOS EXPOSURE IN VISIT 2 B-V = 0.2+/-.4 Comments: P <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< ARALLEL TO FOS OBSERVATION OF TARGET 2 ------------------------------------------------------------------------------------------------------------------------------------ NGC6822-PAR3 EXT-CLUSTER, OB WILL BE THE WFPC2 POSITION DURING V = 16+/-0.03 Association FOS EXPOSURE IN VISIT 3 B-V = 0.2+/-.4 Comments: P <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< ARALLEL TO FOS OBSERVATION OF TARGET 3 ------------------------------------------------------------------------------------------------------------------------------------ NGC6822-PAR4 EXT-CLUSTER, OB WILL BE THE WFPC2 POSITION DURING V = 16+/-0.03 Association FOS EXPOSURE IN VISIT 4 B-V = 0.2+/-.4 Comments: P <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< ARALLEL TO FOS OBSERVATION OF TARGET 4 ------------------------------------------------------------------------------------------------------------------------------------ NGC6822-PAR5 EXT-CLUSTER, OB WILL BE THE WFPC2 POSITION DURING V = 16+/-0.03 Association FOS EXPOSURE IN VISIT 5 B-V = 0.2+/-.4 Comments: P <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< ARALLEL TO FOS OBSERVATION OF TARGET 5 ------------------------------------------------------------------------------------------------------------------------------------ 6567( 18) - 07/11/96 15:39 - [ 6] Visit: 01 Visit Requirements: ORIENT 265D TO 269D On Hold Comments: Additional Comments: ROLL IS TO GET PARALLEL ON POSITION NE Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC6822-OB1 FOS/BL ACQ/BIN 4.3 MIRROR 1 37 S ONBOARD ACQ FOR 2,4,6,7,8 5-9 ARY ,9 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC6822-OB1 FOS/BL ACCUM 1.0 G270H 2222-33 1 6 M 5-9 01 ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC6822-PAR WFPC2 IMAGE WFALL-F F555W ATD-GAIN=15 1 5 M PAR WITH 2 1 IX ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC6822-OB1 FOS/BL ACCUM 1.0 G190H 1573-23 1 12 M 5-9 30 ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC6822-PAR WFPC2 IMAGE WFALL-F F439W ATD-GAIN=15 1 6 M PAR WITH 4 1 IX ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC6822-OB1 HRS ACCUM 2.0 G140L 1380-16 1 2556.8 NO SPLIT 5-9 66 ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC6822-OB1 HRS ACCUM 2.0 G140L 1380-16 1 2556.8 NO SPLIT 5-9 66 ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC6822-OB1 HRS ACCUM 2.0 G140L 1180-14 1 2556.8 NO SPLIT 5-9 66 ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC6822-OB1 HRS ACCUM 2.0 G140L 1180-14 1 2556.8 NO SPLIT 5-9 66 ------------------------------------------------------------------------------------------------------------------------------------ 6567( 18) - 07/11/96 15:39 - [ 7] Visit: 02 Visit Requirements: ORIENT 275D TO 281D On Hold Comments: Additional Comments: ROLL IS TO GET PARALLEL ON POSITION NE Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC6822-OB1 FOS/BL ACQ/BIN 4.3 MIRROR 1 42 S ONBOARD ACQ FOR 2,4,6,7,8 3-9 ARY ,9 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC6822-OB1 FOS/BL ACCUM 1.0 G270H 2222-33 1 6 M 3-9 01 ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC6822-PAR WFPC2 IMAGE WFALL-F F675W ATD-GAIN=15 1 5 M PAR WITH 2 2 IX ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC6822-OB1 FOS/BL ACCUM 1.0 G190H 1573-23 1 630 S 3-9 30 ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC6822-PAR WFPC2 IMAGE WFALL-F F336W ATD-GAIN=7 1 6 M PAR WITH 4 2 IX ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC6822-OB1 HRS ACCUM 2.0 G140L 1380-16 1 2556.8 NO SPLIT 3-9 66 ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC6822-OB1 HRS ACCUM 2.0 G140L 1380-16 1 2556.8 NO SPLIT 3-9 66 ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC6822-OB1 HRS ACCUM 2.0 G140L 1180-14 1 2556.8 NO SPLIT 3-9 66 ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC6822-OB1 HRS ACCUM 2.0 G140L 1180-14 1 2556.8 NO SPLIT 3-9 66 ------------------------------------------------------------------------------------------------------------------------------------ 6567( 18) - 07/11/96 15:39 - [ 8] Visit: 03 Visit Requirements: ORIENT 115D TO 117D On Hold Comments: Additional Comments: ROLL IS TO GET PARALLEL ON POSITION W Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC6822-OB8 FOS/BL ACQ/BIN 4.3 MIRROR 1 26 S ONBOARD ACQ FOR 2,4,6,7,8 F-2 ARY ,9 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC6822-OB8 FOS/BL ACCUM 1.0 G270H 2222-33 1 6 M F-2 01 ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC6822-PAR WFPC2 IMAGE WFALL-F F555W ATD-GAIN=15 1 5 M PAR WITH 2 3 IX ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC6822-OB8 FOS/BL ACCUM 1.0 G190H 1573-23 1 12 M F-2 30 ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC6822-PAR WFPC2 IMAGE WFALL-F F439W ATD-GAIN=15 1 6 M PAR WITH 4 3 IX ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC6822-OB8 HRS ACCUM 2.0 G140L 1380-16 4 625.6 S NO SPLIT F-2 66 ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC6822-OB8 HRS ACCUM 2.0 G140L 1380-16 4 625.6 S NO SPLIT F-2 66 ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC6822-OB8 HRS ACCUM 2.0 G140L 1180-14 4 625.6 S NO SPLIT F-2 66 ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC6822-OB8 HRS ACCUM 2.0 G140L 1180-14 4 625.6 S NO SPLIT F-2 66 ------------------------------------------------------------------------------------------------------------------------------------ 6567( 18) - 07/11/96 15:39 - [ 9] Visit: 04 Visit Requirements: ORIENT 122D TO 125D On Hold Comments: Additional Comments: ROLL IS TO GET PARALLEL ON POSITION W Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC6822-OB6 FOS/BL ACQ/BIN 4.3 MIRROR 1 60 S ONBOARD ACQ FOR 2,4,6,7,8 -16 ARY ,9,10 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC6822-OB6 FOS/BL ACCUM 1.0 G270H 2222-33 1 6 M -16 01 ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC6822-PAR WFPC2 IMAGE WFALL-F F675W ATD-GAIN=15 1 5 M PAR WITH 2 4 IX ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC6822-OB6 FOS/BL ACCUM 1.0 G190H 1573-23 1 12 M -16 30 ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC6822-PAR WFPC2 IMAGE WFALL-F F336W ATD-GAIN=7 1 6 M PAR WITH 4 4 IX ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC6822-OB6 HRS ACCUM 2.0 G140L 1380-16 4 625.6 S NO SPLIT -16 66 ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC6822-OB6 HRS ACCUM 2.0 G140L 1380-16 4 625.6 S NO SPLIT -16 66 ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC6822-OB6 HRS ACCUM 2.0 G140L 1180-14 4 625.6 S NO SPLIT -16 66 ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC6822-OB6 HRS ACCUM 2.0 G140L 1180-14 4 625.6 S NO SPLIT -16 66 ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC6822-OB6 HRS ACCUM 2.0 G140L 1180-14 4 625.6 S NO SPLIT -16 66 ------------------------------------------------------------------------------------------------------------------------------------ 6567( 18) - 07/11/96 15:39 - [ 10] Visit: 05 Visit Requirements: ORIENT 127D TO 133D On Hold Comments: Additional Comments: ROLL IS TO GET PARALLEL OVERLAP WITH VISIT 3, 4 PAR POS W Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC6822-OB7 FOS/BL ACQ/BIN 4.3 MIRROR 1 40 S ONBOARD ACQ FOR 2,4,6,7,8 -15 ARY ,9 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC6822-OB7 FOS/BL ACCUM 1.0 G270H 2222-33 1 6 M -15 01 ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC6822-PAR WFPC2 IMAGE WFALL-F F555W ATD-GAIN=15 1 5 M PAR WITH 2 5 IX ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC6822-OB7 FOS/BL ACCUM 1.0 G190H 1573-23 1 12 M -15 30 ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC6822-PAR WFPC2 IMAGE WFALL-F F336W ATD-GAIN=7 1 6 M PAR WITH 4 5 IX ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC6822-OB7 HRS ACCUM 2.0 G140L 1380-16 4 571.2 S NO SPLIT -15 66 ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC6822-OB7 HRS ACCUM 2.0 G140L 1380-16 4 571.2 S NO SPLIT -15 66 ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC6822-OB7 HRS ACCUM 2.0 G140L 1180-14 4 571.2 S NO SPLIT -15 66 ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC6822-OB7 HRS ACCUM 2.0 G140L 1180-14 4 571.2 S NO SPLIT -15 66 ------------------------------------------------------------------------------------------------------------------------------------ 6567( 18) - 07/11/96 15:39 - [ 11] Visit: 06 Visit Requirements: ORIENT 223D TO 228D 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 NGC6822-OB6 WFPC2 IMAGE PC1 F555W ATD-GAIN=15 2 4 M MAX DUR 5M -OB7 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC6822-OB6 WFPC2 IMAGE PC1 F439W ATD-GAIN=15 2 4 M MAX DUR 5M -OB7 ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC6822-OB6 WFPC2 IMAGE PC1 F656N ATD-GAIN=15 1 7 M EXPAND -OB7 ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC6822-OB6 WFPC2 IMAGE PC1 F336W ATD-GAIN=7 2 6 M -OB7 ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC6822-OB6 WFPC2 IMAGE PC1 F255W ATD-GAIN=7 2 10 M EXPAND -OB7 ------------------------------------------------------------------------------------------------------------------------------------ 6567( 18) - 07/11/96 15:39 - [ 12] Visit: 07 Visit Requirements: ORIENT 277D TO 283D 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 NGC6822-OB1 WFPC2 IMAGE PC1 F555W ATD-GAIN=15 2 4 M MAX DUR 5M 3-OB15-OB8 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC6822-OB1 WFPC2 IMAGE PC1 F439W ATD-GAIN=15 2 4 M MAX DUR 5M 3-OB15-OB8 ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC6822-OB1 WFPC2 IMAGE PC1 F656N ATD-GAIN=15 1 7 M EXPAND 3-OB15-OB8 ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC6822-OB1 WFPC2 IMAGE PC1 F336W ATD-GAIN=7 2 6 M 3-OB15-OB8 ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC6822-OB1 WFPC2 IMAGE PC1 F255W ATD-GAIN=7 2 10 M EXPAND 3-OB15-OB8 ------------------------------------------------------------------------------------------------------------------------------------ 6567( 18) - 07/11/96 15:39 - [ 13] Summary Form for Proposal 6567 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/BL WFPC2 HRS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/BINARY ACCUM IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ATD-GAIN=15 ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category HOT STARS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 265D TO 269D ONBOARD ACQ FOR 2,4,6,7,8,9 PAR WITH 2 PAR WITH 4 NO SPLIT ORIENT 275D TO 281D ORIENT 115D TO 117D ORIENT 122D TO 125D ONBOARD ACQ FOR 2,4,6,7,8,9,10 ORIENT 127D TO 133D ORIENT 223D TO 228D MAX DUR 5M EXPAND ORIENT 277D TO 283D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G270H F555W G190H F439W G140L F675W F336W F656N F255W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC6822-OB15-9 NGC6822-PAR1 NGC6822-OB13-9 NGC6822-PAR2 NGC6822-OB8F-2 NGC6822-PAR3 NGC6822-OB6-16 NGC6822-PAR4 NGC6822-OB7-15 NGC6822-PAR5 NGC6822-OB6-OB7 NGC6822-OB13-OB15-OB8 ------------------------------------------------------------------------------------------------------------------------------------