! Proposal 6603, submission 1 ! PI: John Bally ! Received Fri Feb 16 17:40:17 EST 1996 ! From: bally@casa.Colorado.EDU ! +====================+ ! | PED OUTPUT PRODUCT | ! +====================+ ! ! /a/nebula/home/casa/bally/roff/PROPOSALS/HST6/PHASEII/6603.prop ! Generated by PREPROCESSOR, version 6.0e ! Date: Thu Feb 8 15:34:53 MST 1996 Proposal_Information Title: Probing Proto-Planetary Disks in the Orion Nebula Proposal_Category: GO Scientific_Category: BINARIES AND STAR FORMATION Cycle: 6 Investigators PI_Name: John Bally PI_Institution: University of Colorado CoI_Name: Mark McCaughrean CoI_Institution: Max Planck Institute for Astronomy, Heidelberg Contact: CoI_Name: C. Robert O'Dell CoI_Institution: Rice University Contact: CoI_Name: Ralph Sutherland CoI_Institution: Mt. Stromolo and Siding Spring Observatories Contact: CoI_Name: David Devine CoI_Institution: University of Colorado Contact: Abstract: We will probe fundamental physical properties and structures of recently discovered, and uniquely visible, protoplanetary disks around young stars in the Orion Nebula (M42, NGC1976). We will obtain narrow band and continuum images with the maximum possible angular resolution and use orders of magnitude deeper integrations than previously attempted. We will achieve images of protoplanetary disks with a linear resolutions of ~ 5 to 20 A.U., a factor a 2 to 5 improvement over previous HST results. It is vital to carry out these new high resolution deep integrations because accurate determinations of absorption profiles will be fundamental in constraining models of disks and their interactions with the nebula environment. There is also the exciting possibility of detecting absorption profile ``gaps'' or rings on A.U. scales that could be direct evidence for extra--solar planets. Hence, our primary objectives are to obtain: 1 Deep PC & WFC images of a small number of selected objects (discovered in Cycle 4 & 5) which we believe to be disks seen in silhouette, or are disks in ionized envelopes, 2 Deep UV images with the FOC of pure dark objects that lie in front of the brightest portion of the Orion Nebula. 3 Proper motion determinations of fast compact nebular components. Using earlier epoch HST data, our Cycle 6 WFPC2 images will give a proper motion sensitivity (> 40 Delta t_years^-1 kms) allowing us to detect moving gas from stationary nebula gas. Observing_Description Description of Primary Targets NGC1976-HST16 This is the largest dark disk that is seen relatively face on. We will take very deep images in three narrow-band filters with the PC in an attempt to obtain an accurate radial profile for the dust distribution and its wavelength dependence, and to look for gaps that may indicate giant planet formation. We plan to integrate a full orbit in the FOC F220W filter in an attempt to obtain 8 AU angular resolution which can be used to set limits on gaps as narrow as a fraction of an AU under the back lit circumstances of HST 16. NGC1976-HST10 field HST 10 is a tear drop shaped bright proplyd that contains a 1' diameter edge-on disk. Its central star is not visible out to Lambda = 3.8Mum. It is either a flattened starless core or an edge-on circumstellar disk with at least 50 to 100 magnitudes of visual extinction. This object exhibits the strongest H_2 S(1) line of any of the proplyds observed at the IRTF. UV observations for a full orbit will be used to compare the disk properties at UV and red wavelengths, obtain constraints on grain properties, and to look for pile of up of dust near the ionization front. HST 10 will fall in the same PC frame as HST16, so it will be be reobserved with a factor of two better resolution and 10 times longer integration than previous (Cycle 4 & 5) data, with no additional integrations. NGC1976-SW It is a 2"\\ diameter silhouetted disk seen edge on that contains an obscured star whose radiation illuminates cones of visual and near--IR light along its minor axis. The star has not been detected directly even at 1 micron, implying a large line--of--sight extinction. We plan two orbits for polarimetry with broad-band WFC filters (POLQ + F606W). In these filters, the reflection cones will be relatively bright (providing a signal of about 3 electron/second in a PC pixel. The reflection cone is expected to be highly polarized. The polarization data will constrain the source geometry as well as the dust properties. We plan obtain dithered PC observations of this object in 2 narrow band filters, (chosen to contain the brightest background fluxes) in an attempt to obtain the radial and vertical column density profiles. We will also obtain a full orbit integration in a far red broad- band filter in order to detect the central star, or obtain a lower limit in the opacity towards it. This will also allow us to determine a lower limit to the total dust mass in the disk, a vital parameter. In each orbit, we will use sub-pixel sub-stepping to reach the full angular resolution of HST. The discovery observations of SW are qualitatively consistent with edge-on embedded YSOs modeled by Whitney & Hartmann (1992, ApJ, 395, 529; 1993, ApJ, 402, 605), and we expect that the more quantitative comparisons that will be possible with the new data will help us determine the vertical structure in the disk and the diffuse scattering halo surrounding it. NGC1976-HST8 This is one of the largest cometary teardrop shaped proplyds in the Orion Nebula. It contains both a visible star and a dark disk inside the ionized teardrop. It is illuminated by Theta ^2A Ori, an O9 star below the Orion Bar. This object was discovered in the pre-repair mission images O'Dell, Wen, and Hu (1993). Full orbit sub-stepped images in narrow band filters will characterize the disk and ionization conditions. NGC1976-PC151, NGC1976-WF1, NGC1976-PC10, NGC1976-SIX, NGC1976-SEVEN These are all dark silhouette proplyds discovered during the Cycle 4 & 5 surveys. Most are small (sub- arcsecond), and the present WFC images are poorly resolved. Therefore we will obtain PC images in a single bright emission line (HAlpha, F656N), using sub-pixel dithering to obtain the full resolution at that wavelength. Each disk will be given one orbit. These observations will define the radial extent and other characteristics of of these disks, and in combination with the other dark disk observations, will provide us with the first opportunity to determine the statistical properties of set of YSO disks. NGC1976-LV5 This single FOC pointing contains 5 proplyds. These objects lie very close to the Trapezium and are the brightest of the cometary proplyds (similar to the ones shown in Figure 1 frames 1, 2, and 4). Our Cycle 4 short exposures show tantalizing evidence of dark disks inside the bright cometary shapes. Full orbit wide band images will delineate these disks clearly. Data will be used for analysis of proplyd morphology and its relation to the central star properties (mostly determined from near-IR and ground based visual spectra) and location within the M42 core. FOC images will use spectral elements that include the brightest UV emission features. Exposure times for the above sources are based on our ERO and Cycle 4 data, scaled to PC (or FOC) resolution, with the requirement that at least 2 high S/N exposures are needed in each dithered position for cosmic ray rejection. Parallel Observations We will use WFPC2 to obtain narrow band parallel observations while we perform primary data acquisition on the FOC. This data will permit coverage of outlying regions of M42 not covered by primary WFPC2 targeting and will greatly increase the area of the sky in which proplyds, shock excited nebulae (Herbig-Haro) objects and stellar jets, have been searched. The roll requirements for HST will be determined by the desire to make WFPC2 coverage of the Orion Nebula complete as possible. This should allow completion of coverage of M43, a nearby and simpler HII region which is partially covered by Cycle 4 parallel observations. Related Observations Optical We have used facilities at Kitt Peak National Observatory, the ESO New Technology Telescope, and the facilities at McDonald Observatory to obtain high dispersion spectra of the proplyds and the surrounding nebula (Coude feed and McDonald Cas spectrometer), and to acquire narrow band images of the nebula with the best angular resolution possible from the ground (with the NTT). Near Infrared Near infrared observations of the 2.1218Mum S(1) line of H_2 obtained in November 1994 with the IRTF (with CSHELL) resulted in the detection of strong H_2 emission (considerably brighter than that produced by the background molecular cloud) from 8 out of 10 proplyds, including HST 1 and HST 10. This data demonstrates the existence of large quantities of molecular gas between the proplyd ionization front and the central star. The H_2 emission is likely to be excited by incident UV light. Although HST 10 has the brightest H_2 emission of any proplyd studied so far, the dark object HST 16 was not detected, probably due to insufficient UV excitation. McCaughrean, Zinnecker, Rayner, and Stauffer have obtained 1 to 4micron (JHKL) imaging photometry of the Trapezium Cluster on Calar Alto and at the IRTF\\@. These data will be combined with existing and new HST V and I imaging photometry, as well as optical spectroscopy, in order to determine the ages and masses of the cluster stars. These stellar parameters will be used in the analysis of the proplyds, as they play a role in the disk structure and dynamics. Also, they help constrain the inner edge of the disk, as the majority of all Trapezium stars are found to show excess 4micron flux, thought to arise in that region (McCaughrean et al. 1994: http://spitfire.mpia- hd.mpg.de/Preprints.html ``Circumstellar disks in the Trapezium Cluster''). Millimeter Wavelengths We have applied for time to use the Owens Valley Interferometer to search for millimeter-wavelength emission from the proplyds, in order to determine the total dust mass from the continuum emission, and the cold gas mass and dynamics traced by the J=2--1 isotopes of CO\\@. From the mm-wave continuum, we can estimate the total dust mass present. Although optical obscuration is not a reliable dust indicator for the proplyds, a comparison of the optical extinction and millimeter dust emission can provide constraints of the grain sizes. The width of mm-wavelength spectral lines will provide kinematic constraints on the mass of the central star, since for the largest proplyds, we may detect Keplerian rotation. From the integrated line flux, we can estimate the total column density of the molecules, and combine this with the continuum to estimate gas to dust ratios, depletions, and hopefully the total mass of the protoplanetary disks. Other These observations provide us with the best available optical and ground based data on these objects. This data, together with the ionization code, MAPPINGS II (Sutherland & Dopita 1992, ApJS, 88, 253) are being used to analyze spectral lines extending from the UV to the near-IR data to infer ionization and excitation conditions in and around the proplyds. Detailed theoretical dust models which can take into account classical grains and small organic grains in various mixtures will be used to model the dust front physics. Fixed_Targets Target_Number: 1 Target_Name: NGC1976-HST10-16 Alternate_Names: 183-405 Description: ISM, HII REGION,STAR,T TAURI STAR Position: RA=05H 35M 18.26S +/- 1.0",DEC=-05D 24' 09.2" +/- 1.0" Equinox: 2000 RV_or_Z: RA_PM: Dec_PM: Epoch: 2000 Annual_Parallax: Flux: F-LINE(6563)=5 +/- 1 e-13 Comments: Target_Number: 2 Target_Name: NGC1976-SW Alternate_Names: 114-426 Description: ISM, HII REGION,STAR,T TAURI STAR Position: RA=05H 35M 11.35S +/- 1.0",DEC=-05D 24' 26.3" +/- 1.0" Equinox: J2000 RV_or_Z: RA_PM: 0.0 Dec_PM: 0.0 Epoch: J2000 Annual_Parallax: 0.0 Flux: F-LINE(6563)=-5 +/- 1 e-13 Comments: Target_Number: 3 Target_Name: NGC1976-PC151-SIX Alternate_Names: 167-231 Description: ISM, HII REGION,STAR,T TAURI STAR Position: RA=05H 35M 16.63S +/- 1.0",DEC=-05D 22' 42.6" +/- 1.0" Equinox: 2000 RV_or_Z: RA_PM: Dec_PM: Epoch: 2000 Annual_Parallax: Flux: F-LINE(6563)=5 +/- 1 e-13 Comments: Target_Number: 4 Target_Name: NGC1976-WF1 Alternate_Names: 218-354 Description: ISM, HII REGION,STAR,T TAURI STAR Position: RA=05H 35M 21.80S +/- 1.0",DEC=-05D 23' 54.06" +/- 1.0" Equinox: 2000 RV_or_Z: RA_PM: Dec_PM: Epoch: 2000 Annual_Parallax: Flux: F-LINE(6563)=5 +/- 1 e-13 Comments: Target_Number: 5 Target_Name: NGC1976-LV6VLA10 Alternate_Names: 158-327 LV-5 Description: ISM, HII REGION,STAR,T TAURI STAR Position: RA=05H 35M 15.83S +/- 1.0",DEC=-05D 23' 25.65" +/- 1.0" Equinox: 2000 RV_or_Z: RA_PM: Dec_PM: Epoch: 2000 Annual_Parallax: Flux: F-LINE(6563)=5 +/- 1 e-13 Comments: Target_Number: 6 Target_Name: NGC1976-HST16 Alternate_Names: 158-327 Description: ISM, HII REGION,STAR,T TAURI STAR Position: RA=05H 35M 18.32S +/- 1.0",DEC=-05D 24' 05.0" +/- 1.0" Equinox: 2000 RV_or_Z: RA_PM: Dec_PM: Epoch: 2000 Annual_Parallax: Flux: F-LINE(6563)=-5 +/- 1 e-13 Comments: Target_Number: 7 Target_Name: NGC1976-HST1 Alternate_Names: 182-332 Description: ISM, HII REGION,STAR,T TAURI STAR Position: RA=05H 35M 17.67S +/- 1.0",DEC=-05D 23' 41.0" +/- 1.0" Equinox: 2000 RV_or_Z: RA_PM: Dec_PM: Epoch: 2000 Annual_Parallax: Flux: F-LINE(6563)=5 +/- 1 e-13 Comments: Target_Number: 8 Target_Name: NGC1976-HST8-9 Alternate_Names: 206-446 Description: ISM, HII REGION,STAR,T TAURI STAR Position: RA=05H 35M 20.14S +/- 1.0",DEC=-05D 24' 36.66" +/- 1.0" Equinox: 2000 RV_or_Z: RA_PM: Dec_PM: Epoch: 2000 Annual_Parallax: Flux: F-LINE(6563)=5 +/- 1 e-13 Comments: Target_Number: 9 Target_Name: NGC1976-PC10 Alternate_Names: 121-1925 Description: ISM, HII REGION,STAR,T TAURI STAR Position: RA=05H 35M 12.10S +/- 1.0",DEC=-05D 19' 25.1" +/- 1.0" Equinox: 2000 RV_or_Z: RA_PM: Dec_PM: Epoch: 2000 Annual_Parallax: Flux: F-LINE(6563)=5 +/- 1 e-13 Comments: Target_Number: 10 Target_Name: NGC1976-HST10 Alternate_Names: 182-413 Description: ISM, HII REGION,STAR,T TAURI STAR Position: RA=05H 35M 18.21S +/- 1.0",DEC=-05D 24' 13.3" +/- 1.0" Equinox: 2000 RV_or_Z: RA_PM: Dec_PM: Epoch: 2000 Annual_Parallax: Flux: F-LINE(6563)=5 +/- 1 e-13 Comments: Visits Visit_Number: 01 Visit_Requirements: ORIENT 310D TO 320D On_Hold_Comments: Visit_Comments: U3PA=315+/-5 Exposure_Number: 1 Target_Name: NGC1976-HST10-16 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F502N Wavelength: 5007 Optional_Parameters: DITHER-TYPE=BOX Number_of_Iterations: 1 Time_Per_Exposure: 400S Special_Requirements: Comments: [OIII] Exposure_Number: 2 Target_Name: NGC1976-HST10-16 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F658N Wavelength: 6584 Optional_Parameters: DITHER-TYPE=BOX Number_of_Iterations: 1 Time_Per_Exposure: 400S Special_Requirements: Comments: [NII] Exposure_Number: 3 Target_Name: NGC1976-HST10-16 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F658N Wavelength: 6584 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 60S Special_Requirements: Comments: [NII] Exposure_Number: 4 Target_Name: NGC1976-HST10-16 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F656N Wavelength: 6563 Optional_Parameters: DITHER-TYPE=BOX Number_of_Iterations: 1 Time_Per_Exposure: 400S Special_Requirements: Comments: Ha Exposure_Number: 5 Target_Name: NGC1976-HST10-16 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F656N Wavelength: 6563 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 60S Special_Requirements: Comments: Ha Visit_Number: 02 Visit_Requirements: ORIENT 65D TO 75D On_Hold_Comments: Visit_Comments: U3PA=70D+/-5 Exposure_Number: 6 Target_Name: NGC1976-SW Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F502N Wavelength: 5007 Optional_Parameters: DITHER-TYPE=BOX Number_of_Iterations: 1 Time_Per_Exposure: 400S Special_Requirements: Comments: [OIII] Exposure_Number: 7 Target_Name: NGC1976-SW Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F656N Wavelength: 6563 Optional_Parameters: DITHER-TYPE=BOX Number_of_Iterations: 1 Time_Per_Exposure: 400S Special_Requirements: Comments: Ha Exposure_Number: 8 Target_Name: NGC1976-SW Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F656N Wavelength: 6563 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 60S Special_Requirements: Comments: Short Ha Exposure_Number: 9 Target_Name: NGC1976-SW Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F814W Wavelength: Optional_Parameters: DITHER-TYPE=BOX Number_of_Iterations: 1 Time_Per_Exposure: 400S Special_Requirements: Comments: CONTINUUM Exposure_Number: 10 Target_Name: NGC1976-SW Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F814W Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 60S Special_Requirements: Comments: SHORT CONTINUUM Exposure_Number: 11 Target_Name: NGC1976-SW Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F606W,POLQ Wavelength: Optional_Parameters: DITHER-TYPE=LINE Number_of_Iterations: 1 Time_Per_Exposure: 300S Special_Requirements: Comments: POLARIZATION PA=135D Exposure_Number: 12 Target_Name: NGC1976-SW Config: WFPC2 Opmode: IMAGE Aperture: WF2 Sp_Element: F606W,POLQ Wavelength: Optional_Parameters: DITHER-TYPE=LINE Number_of_Iterations: 1 Time_Per_Exposure: 300S Special_Requirements: Comments: POLARIZATION PA=0D Exposure_Number: 13 Target_Name: NGC1976-SW Config: WFPC2 Opmode: IMAGE Aperture: WF3 Sp_Element: F606W,POLQ Wavelength: Optional_Parameters: DITHER-TYPE=LINE Number_of_Iterations: 1 Time_Per_Exposure: 300S Special_Requirements: Comments: POLARIZATION PA=45D Exposure_Number: 14 Target_Name: NGC1976-SW Config: WFPC2 Opmode: IMAGE Aperture: WF4 Sp_Element: F606W,POLQ Wavelength: Optional_Parameters: DITHER-TYPE=LINE Number_of_Iterations: 1 Time_Per_Exposure: 300S Special_Requirements: Comments: POLARIZATION PA=90D Visit_Number: 03 Visit_Requirements: ORIENT 95D TO 105D On_Hold_Comments: Visit_Comments: U3PA=100D+/-5 Exposure_Number: 15 Target_Name: NGC1976-PC151-SIX Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F656N Wavelength: 6563 Optional_Parameters: DITHER-TYPE=BOX Number_of_Iterations: 2 Time_Per_Exposure: 160S Special_Requirements: Comments: Exposure_Number: 16 Target_Name: NGC1976-PC151-SIX Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F656N Wavelength: 6563 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 200S Special_Requirements: Comments: Exposure_Number: 17 Target_Name: NGC1976-HST1 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F656N Wavelength: 6563 Optional_Parameters: DITHER-TYPE=BOX Number_of_Iterations: 2 Time_Per_Exposure: 160S Special_Requirements: Comments: SEVEN. COPY OF CYCLE 4 POINTING Exposure_Number: 18 Target_Name: NGC1976-HST1 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F656N Wavelength: 6563 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 200S Special_Requirements: Comments: SEVEN. COPY OF CYCLE 4 POINTING Exposure_Number: 19 Target_Name: NGC1976-PC10 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F656N Wavelength: 6563 Optional_Parameters: DITHER-TYPE=BOX Number_of_Iterations: 1 Time_Per_Exposure: 400S Special_Requirements: Comments: EXTEND MOSAIC TO N Visit_Number: 04 Visit_Requirements: ORIENT 250D TO 260D On_Hold_Comments: Visit_Comments: U3PA=255D+/-5 Exposure_Number: 20 Target_Name: NGC1976-WF1 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F656N Wavelength: 6563 Optional_Parameters: DITHER-TYPE=BOX Number_of_Iterations: 1 Time_Per_Exposure: 400S Special_Requirements: Comments: EXTEND WF MOSAIC TO EAST Exposure_Number: 21 Target_Name: NGC1976-HST8-9 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F502N Wavelength: 5007 Optional_Parameters: DITHER-TYPE=BOX Number_of_Iterations: 1 Time_Per_Exposure: 400S Special_Requirements: Comments: [OIII], WF COVERS HH203 AND HH204 Exposure_Number: 22 Target_Name: NGC1976-HST8-9 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F502N Wavelength: 5007 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 60S Special_Requirements: Comments: SHORT [OIII], WF COVERS HH203 AND HH204 Exposure_Number: 23 Target_Name: NGC1976-HST8-9 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F631N Wavelength: 6300 Optional_Parameters: DITHER-TYPE=BOX Number_of_Iterations: 1 Time_Per_Exposure: 400S Special_Requirements: Comments: [OI], WF COVERS HH203 AND HH204 Exposure_Number: 24 Target_Name: NGC1976-HST8-9 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F631N Wavelength: 6300 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 60S Special_Requirements: Comments: SHORT [OI], WF COVERS HH203 AND HH204 Exposure_Number: 25 Target_Name: NGC1976-HST8-9 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F656N Wavelength: 6563 Optional_Parameters: DITHER-TYPE=BOX Number_of_Iterations: 1 Time_Per_Exposure: 400S Special_Requirements: Comments: HA, WF COVERS HH203 AND HH204 Exposure_Number: 26 Target_Name: NGC1976-HST8-9 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F656N Wavelength: 6563 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 60S Special_Requirements: Comments: SHORT HA, WF COVERS HH203 AND HH204 Exposure_Number: 27 Target_Name: NGC1976-HST8-9 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F658N Wavelength: 6583 Optional_Parameters: DITHER-TYPE=BOX Number_of_Iterations: 1 Time_Per_Exposure: 400S Special_Requirements: Comments: [NII], WF COVERS HH203 AND HH204 Exposure_Number: 28 Target_Name: NGC1976-HST8-9 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F658N Wavelength: 6583 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 60S Special_Requirements: Comments: SHORT [NII], WF COVERS HH203 AND HH204 Visit_Number: 05 Visit_Requirements: ORIENT 265D TO 275D On_Hold_Comments: Visit_Comments: U3PA=270D+/-5 Exposure_Number: 29 Target_Name: NGC1976-HST16 Config: FOC/96 Opmode: IMAGE Aperture: 512x512 Sp_Element: F220W Wavelength: 2200 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1100S Special_Requirements: Comments: UV CONTINUUM Exposure_Number: 30 Target_Name: NGC1976-HST16 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F656N Wavelength: 6563 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 900S Special_Requirements: PAR WITH 29 Comments: WF EXTENDS Ha MOSAIC NW Exposure_Number: 31 Target_Name: NGC1976-HST16 Config: FOC/96 Opmode: IMAGE Aperture: 512x512 Sp_Element: F220W Wavelength: 2200 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1100S Special_Requirements: POS TARG +0.3535, +0.3535 Comments: UV CONTINUUM Exposure_Number: 32 Target_Name: NGC1976-HST16 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F656N Wavelength: 6563 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 900S Special_Requirements: PAR WITH 31 Comments: WF EXTENDS Ha MOSAIC NW Exposure_Number: 33 Target_Name: NGC1976-HST10 Config: FOC/96 Opmode: IMAGE Aperture: 512x512 Sp_Element: F220W Wavelength: 2200 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1100S Special_Requirements: Comments: UV CONTINUUM Exposure_Number: 34 Target_Name: NGC1976-HST10 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F673N Wavelength: 6731 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 900S Special_Requirements: PAR WITH 33 Comments: WF EXTENDS [SII] MOSAIC NW Exposure_Number: 35 Target_Name: NGC1976-HST10 Config: FOC/96 Opmode: IMAGE Aperture: 512x512 Sp_Element: F220W Wavelength: 2200 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1100S Special_Requirements: POS TARG +0.3535, +0.3535 Comments: UV CONTINUUM Exposure_Number: 36 Target_Name: NGC1976-HST10 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F673N Wavelength: 6731 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 900S Special_Requirements: PAR WITH 35 Comments: WF EXTENDS [SII] MOSAIC NW Exposure_Number: 37 Target_Name: NGC1976-LV6VLA10 Config: FOC/96 Opmode: IMAGE Aperture: 512x512 Sp_Element: F220W Wavelength: 2200 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1100S Special_Requirements: Comments: UV CONTINUUM Exposure_Number: 38 Target_Name: NGC1976-LV6VLA10 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F658N Wavelength: 6584 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 900S Special_Requirements: PAR WITH 37 Comments: WF EXTENDS [NII] MOSAIC NW Exposure_Number: 39 Target_Name: NGC1976-LV6VLA10 Config: FOC/96 Opmode: IMAGE Aperture: 512x512 Sp_Element: F220W Wavelength: 2200 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1100S Special_Requirements: POS TARG +0.3535, +0.3535 Comments: UV CONTINUUM Exposure_Number: 40 Target_Name: NGC1976-LV6VLA10 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F658N Wavelength: 6584 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 900S Special_Requirements: PAR WITH 39 Comments: WF EXTENDS [NII] MOSAIC NW Exposure_Number: 41 Target_Name: NGC1976-HST1 Config: FOC/96 Opmode: IMAGE Aperture: 512x512 Sp_Element: F220W Wavelength: 2200 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1100S Special_Requirements: Comments: UV CONTINUUM Exposure_Number: 42 Target_Name: NGC1976-HST1 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F502N Wavelength: 5007 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 900S Special_Requirements: PAR WITH 41 Comments: WF EXTENDS [OIII] MOSAIC NW Exposure_Number: 43 Target_Name: NGC1976-HST1 Config: FOC/96 Opmode: IMAGE Aperture: 512x512 Sp_Element: F220W Wavelength: 2200 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1100S Special_Requirements: POS TARG +0.3535, +0.3535 Comments: UV CONTINUUM Exposure_Number: 44 Target_Name: NGC1976-HST1 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F502N Wavelength: 5007 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 900S Special_Requirements: PAR WITH 43 Comments: WF EXTENDS [OIII] MOSAIC NW Data_Distribution ! Defaults indicated; change if desired Medium: 8MM Blocking_Factor: 10 Ship_To: John Bally CASA, Campus Box 389 University of Colorado Boulder, CO 80309 Ship_Via: UPS Recipient_Email: ! Let us know what you think of this template and software! ! Please send a list of your likes and dislikes to your Program Coordinator