16860( 2) - 22-Oct-2021 18:44:21 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16860 Version: 2 Check-in Time: 22-Oct-2021 18:44:21 STScI Edit Number: 0 Title Optical and Infrared imaging of the dark cloud CB 130-3 ------------------------------------------------------------------------------------ Type Cycle GO/DD 29 ------------------------------------------------------------------------------------ Investigators Contact? PI: Christopher Britt Space Telescope Science Institute Y CoI: Quyen Hart Space Telescope Science Institute Y CoI: Max Mutchler Space Telescope Science Institute Y CoI: Joseph DePasquale Space Telescope Science Institute N CoI: Alyssa Pagan Space Telescope Science Institute N CoI: Holly Ryer (Greathouse) Space Telescope Science Institute N CoI: Ray Villard Space Telescope Science Institute N CoI: Christine Pulliam Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract We propose to take broadband optical and infrared images of the dark cloud CB 130-3. Observations will be made in F475W, F606W, F814W, and F125W to complement archival F160W data. ------------------------------------------------------------------------------------ Observations Description ------------------------ WFC3/IR H-band (F160W) images exist for CB130-3 under program 11618 (PI Tracy Huard). We request 4 orbits to image this nebula in three optical broadband BVI filters (F475W, F606W, F814W) and one additional wide J-band infrared filter (F125W). This will allow us to create two color-composite images: one optical accentuating the gas and obscuring dust, and one near-infrared revealing the stars. For the optical imaging we propose a single WFC3 pointing with a 3-point gap dither to mitigate artifacts such as cosmic rays, hot pixels, and the interchip gap. For the infrared imaging we will perform a 3-point blob dither which is stretched to better match the UVIS field. The central region of the dark nebula will still have the maximum signal-to-noise, which then falls off at the edges which mostly have bright stars in the IR. 4 orbits split between the 4 filters will allow us to match the depth of the archival F160W observations to visually demonstrate the differences between wavelengths at equal exposure times. We will also obtain parallel ACS images with B and I filters. Scheduling will be constrained to match the orientation of the existing WFC3/IR data (HST program 11618) as closely as possible, and preferably not long after the target comes out of solar exclusion in February 2022. ------------------------------------------------------------------------------------ 16860( 2) - 22-Oct-2021 18:44:21 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 CB130-3 ISM, DARK CLOUD RA=18H16M16.2820S, J2000 V = 18 +/- 4 DEC=-02D32'34.38" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 16860( 2) - 22-Oct-2021 18:44:21 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 5 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 87 Angle_Between_Sides Center_Pattern YES ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 15.5 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 41.86 Angle_Between_Sides Center_Pattern YES ------------------------------------------------------------------------------------------------------------------------------------ 16860( 2) - 22-Oct-2021 18:44:21 - [ 4] Visit: 01 Visit Requirements: ORIENT 269D TO 275 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 CB130-3 WFC3/UVI ACCUM UVIS-CENT F475W CR-SPLIT=NO 1 900 S PATTERN 1 1-5; PAR 4-5 S ER (2700 S) WITH 1-3 ------------------------------------------------------------------------------------------------------------------------------------ 2 CB130-3 WFC3/UVI ACCUM UVIS-CENT F606W CR-SPLIT=NO 1 700 S S ER (2100 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 CB130-3 WFC3/UVI ACCUM UVIS-CENT F814W CR-SPLIT=NO 1 800 S S ER (2400 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 ANY ACS/WFC ACCUM WFCENTER F435W 1 1100 S (3300 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 ANY ACS/WFC ACCUM WFCENTER F814W 1 1100 S (3300 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 CB130-3 WFC3/IR MULTIAC IR-FIX F125W SAMP-SEQ=STEP100, NSAMP=14 1 DEF PATTERN 2 6 CUM (2397.699 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 | ------------------------------------------------------------------------------------------------------------------------------------ CB130-3 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 none none none 1 N/A S TER CB130-3 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 none none none 2 N/A S TER CB130-3 1 WFC3/UVI ACCUM UVIS-CEN F475W 3 none none none 3 N/A S TER CB130-3 2 WFC3/UVI ACCUM UVIS-CEN F606W 1 none none none 1 N/A S TER CB130-3 2 WFC3/UVI ACCUM UVIS-CEN F606W 2 none none none 2 N/A S TER CB130-3 2 WFC3/UVI ACCUM UVIS-CEN F606W 3 none none none 3 N/A S TER CB130-3 3 WFC3/UVI ACCUM UVIS-CEN F814W 1 none none none 1 N/A S TER CB130-3 3 WFC3/UVI ACCUM UVIS-CEN F814W 2 none none none 2 N/A S TER 16860( 2) - 22-Oct-2021 18:44:21 - [ 5] 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 | ------------------------------------------------------------------------------------------------------------------------------------ CB130-3 3 WFC3/UVI ACCUM UVIS-CEN F814W 3 none none none 3 N/A S TER ANY 4 ACS/WFC ACCUM WFCENTER F435W 1 none none none 1 N/A ANY 4 ACS/WFC ACCUM WFCENTER F435W 2 none none none 2 N/A ANY 4 ACS/WFC ACCUM WFCENTER F435W 3 none none none 3 N/A ANY 5 ACS/WFC ACCUM WFCENTER F814W 1 none none none 1 N/A ANY 5 ACS/WFC ACCUM WFCENTER F814W 2 none none none 2 N/A ANY 5 ACS/WFC ACCUM WFCENTER F814W 3 none none none 3 N/A CB130-3 6 WFC3/IR MULTIAC IR-FIX F125W 1 none none none 4 N/A CUM CB130-3 6 WFC3/IR MULTIAC IR-FIX F125W 2 none none none 4 N/A CUM CB130-3 6 WFC3/IR MULTIAC IR-FIX F125W 3 none none none 4 N/A CUM 16860( 2) - 22-Oct-2021 18:44:21 - [ 6] Summary Form for Proposal 16860 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR-FIX, UVIS-CENTER, WFCENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO, NSAMP=14, SAMP-SEQ=STEP100 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 269D TO 275 D, PAR 4-5 WITH 1-3, PATTERN 1 1-5, PATTERN 2 6 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F125W, F435W, F475W, F606W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names ANY, CB130-3 ------------------------------------------------------------------------------------------------------------------------------------