15597( 3) - 09-Aug-2018 15:03:24 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15597 Version: 3 Check-in Time: 09-Aug-2018 15:03:24 STScI Edit Number: 0 Title Infrared imaging of stellar shading in Serpens Nebula EC 82 ------------------------------------------------------------------------------------ Type Cycle GO/DD 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Max Mutchler Space Telescope Science Institute Y CoI: Dr. Joel David Green Space Telescope Science Institute Y CoI: Mr. Zolt Levay Space Telescope Science Institute N CoI: Joseph DePasquale Space Telescope Science Institute N CoI: Christine Pulliam Space Telescope Science Institute N CoI: Ray Villard Space Telescope Science Institute N CoI: Timothy Rhue Space Telescope Science Institute N CoI: Dr. Denise A. Smith Space Telescope Science Institute N CoI: Dr. Klaus M. Pontoppidan Space Telescope Science Institute Y ------------------------------------------------------------------------------------ Abstract We propose infrared imaging of the Serpens Nebula EC 82 to reveal shading by a circumstellar stellar disk around a young stellar object. We expect our observations to reveal new features and add color information to existing archival infrared images. We will also obtain deep narrowband imaging of another part of this molecular cloud with parallel ACS exposures. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will use a single WFC3/IR pointing matched very closely to the existing H-band (F160W) image from HST program 14181 (PI Thomas Megeath) which is at ORIENT=133 degrees. This ideal orientation is available from late July to mid-August 2018, and other acceptable orientations at 90-degree increments are available later. We will obtain J-band and narrowband [Fe II] images using filters F125W and F164N, respectively, to be combined with the existing H-band image. We will also obtain deep H-alpha plus [N II] images of an adjacent part of the molecular cloud using the ACS in parallel with the F658N filter. ------------------------------------------------------------------------------------ 15597( 3) - 09-Aug-2018 15:03:24 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 EC-82 STAR, CIRCUMSTELLAR RA=18H29M58.6540S, J2000 V = 35 +/- 1 MATTER, YSO DEC=+01D14'28.15" Reference Frame: Other: SIMBAD Extended: YES Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 15597( 3) - 09-Aug-2018 15:03:24 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 3 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 42 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 15597( 3) - 09-Aug-2018 15:03:24 - [ 4] Visit: 01 Visit Requirements: ORIENT 123D TO 143 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 EC-82 WFC3/IR MULTIAC IR-FIX F125W NSAMP=10, SAMP-SEQ=STEP200 1 DEF PATTERN 1 1-3; PAR 3 CUM (1797.693 WITH 1-2 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 EC-82 WFC3/IR MULTIAC IR-FIX F164N NSAMP=13, SAMP-SEQ=STEP400 1 DEF CUM (5997.7 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 ANY ACS/WFC ACCUM WFCENTER F658N CR-SPLIT=NO 2 1160 S (6960 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ EC-82 1 WFC3/IR MULTIAC IR-FIX F125W 1 none none none 1 N/A CUM EC-82 1 WFC3/IR MULTIAC IR-FIX F125W 2 none none none 2 N/A CUM EC-82 1 WFC3/IR MULTIAC IR-FIX F125W 3 none none none 3 N/A CUM EC-82 2 WFC3/IR MULTIAC IR-FIX F164N 1 none none none 1 N/A CUM EC-82 2 WFC3/IR MULTIAC IR-FIX F164N 2 none none none 2 N/A CUM EC-82 2 WFC3/IR MULTIAC IR-FIX F164N 3 none none none 3 N/A CUM ANY 3 ACS/WFC ACCUM WFCENTER F658N 1 none 1 none 1 N/A ANY 3 ACS/WFC ACCUM WFCENTER F658N 1 none 2 none 1 N/A ANY 3 ACS/WFC ACCUM WFCENTER F658N 2 none 1 none 2 N/A ANY 3 ACS/WFC ACCUM WFCENTER F658N 2 none 2 none 2 N/A ANY 3 ACS/WFC ACCUM WFCENTER F658N 3 none 1 none 3 N/A ANY 3 ACS/WFC ACCUM WFCENTER F658N 3 none 2 none 3 N/A 15597( 3) - 09-Aug-2018 15:03:24 - [ 5] Summary Form for Proposal 15597 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR-FIX, WFCENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO, NSAMP=10, NSAMP=13, SAMP-SEQ=STEP200, SAMP-SEQ=STEP400 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 123D TO 143 D, PAR 3 WITH 1-2, PATTERN 1 1-3 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F125W, F164N, F658N ------------------------------------------------------------------------------------------------------------------------------------ Target Names ANY, EC-82 ------------------------------------------------------------------------------------------------------------------------------------