0 Assigned ID: 1302 ----- Attempting Submission 1 (Fri Oct 16 20:42:12 GMT 2020) ----- FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser In this resubmission, we increased the FLASH level to 20e total for the WFC3 F665N exposures, on advice from our Contact Scientist, Joel Green (based on a recent ISR by Jay Anderson). In the text, we also fixed old references to the F658N filter which we are no longer using. -- Max Mutchler -871598892 ----- Attempting Submission 1 (Tue Oct 20 20:21:15 GMT 2020) ----- ----- Attempting Submission 2 (Fri Oct 30 18:24:30 GMT 2020) ----- We are intentionally ignoring the FLASH warning since we are advised by our Contact Scientist to use a higher value or 20e total for the WFC3 F665N filter. Imaging of Arp 143 We propose to obtain imaging of the interacting galaxies Arp 143 with 3 broadband ACS filters F475W, F606W, and F814W as well as the WFC3 Ha+NII narrowband filter F665N. We will obtain high signal-to-noise imaging of the interacting galaxies Arp 143, or NGC 2444, with both broad and narrowband optical filters using the ACS/WFC and WFC3/UVIS instruments. These new optical images will complement existing archival observations in F606W taken with ACS as part of program 15446 (PI: J. Dalcanton). The existing F606W observations are two 390s exposures. We propose to take additional ACS F606W exposures both to enable cosmic ray rejection and raise the S/N, in addition to new F475W and F814W observations. Altogether, we request 6 orbits to make these observations. Using Arp 220 as a template spectrum in the ACS/WFC Exposure Tine Calculator, we can achieve a S/N ratio of at least 100 per resolution element in F475W with 3840s of exposure and in F814W with 2580s. To highlight regions with high star formation activity, we will obtain 4140s of WFC3 F665N, which will reach high S/N in those areas. We will obtain an additional 2310s of F606W to supplement what is in the archive, increasing the S/N to well over 100 per resolution element. At the same time as these observations, we can take parallel field observations with WFC3 in F475W and F606W, with 7200s in each. The Low Surface Brightness Galaxy MCG+07-16-015 is nearby to Arp 143 and can be covered as a WFC3 parallel field at an orientation angle of 245 degrees. Arp 143 fits within the ACS field at any orientation, but an orientation of 245 degrees, possible in December 2020, allows the WFC3 parallel field to cover a low surface brightness galaxy as well. Scheduling in December 2020 would be optimal, though is not strictly required. Technical Implementation team: Dr. Chris Britt is an Outreach Scientist in the Office of Public Outreach at STScI and has worked on planning and product development for past HST anniversary images, as well as a variety of outreach products for the Hubble and Webb missions and NASA's Universe of Learning. Max Mutchler has worked with Hubble's cameras as a member of the STScI Instruments Division, and has conducted many observations with them including Hubble anniversary and Hubble Heritage imaging. Joe DePasquale is the Senior Science Visuals Developer for the Office of Public Outreach at STScI and has worked on every Hubble anniversary image for the past 4 years. Alyssa Pagan is a Science Visuals Developer in the Office of Public Outreach at STScI and has provided public release images with Hubble data for multiple news releases since joining OPO. Outreach Products team: Dr. Quyen Hart is an Outreach Scientist at the Office of Public Outreach at STScI and works on a wide variety of products for Hubble, Webb, and Roman and for NASA's Universe of Learning. Holly Ryer is a Senior Education Specialist at the Office of Public Outreach at STScI and has worked on a wide variety of outreach products for Hubble and Webb. Christine Pulliam is the news branch manager at STScI and oversees news releases across the institute's portfolio. Cheryl Gundy is the Deputy News Chief at STScI and writes many of Hubble's press releases. Ray Villard is the HST News Chief at STScI and has been with the institute since before Hubble launched. Elizabeth Rafferty is a Project Manager for PMO at STScI and keeps the team on schedule and organized. Galaxies 6 false SUPPORTED GALAXY INTERACTING GALAXY TIDAL TAIL This object was generated by the targetselector and retrieved from the SIMBAD database.This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 B=13.1 GALAXY INTERACTING GALAXY TIDAL TAIL This object was generated by the targetselector and retrieved from the SIMBAD database.This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 B=13.1 ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F658N ACS/WFC Imaging No No F814W WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F475W POS-TARG DITHER 3 LINE false false 4 86 LINE 1 false POS-TARG DITHER 35 LINE false false 2 90 LINE 2 false /private/var/folders/tj/27ygn_756lz3w1z19s6wtgtm0006vh/T/OPVisit12381790562869153743.xml The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. 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