0 Assigned ID: 739 ----- Attempting Submission 1 (Fri Apr 05 20:47:58 GMT 2019) ----- HST Phase I Proposal 739 (n132d-cycle27.apt) successfully submitted. Receipt: # 739-1 ----- Attempting Submission 2 (Fri Apr 05 20:49:28 GMT 2019) ----- Adjusted postflash to 15 for ACS/F502N observations as advised by Samantha Hoffmann. -1978121197 ----- Attempting Submission 1 (Wed Jul 24 18:01:05 GMT 2019) ----- ----- Attempting Submission 2 (Tue Nov 05 14:22:35 GMT 2019) ----- Supernovae are among the most powerful and influential explosions in the universe. They are also ideal multi-messenger laboratories to study extreme astrophysics. However, many fundamental properties of supernovae related to their diverse progenitor systems and explosion mechanisms remain poorly constrained, particularly with regard to why and how asymmetry is introduced during core collapse. Young, nearby supernova remnants offer valuable opportunities to investigate these issues in finely resolved detail. A critical parameter in characterizing the explosion dynamics of a supernova remnant is an accurate measurement of its center of expansion and an estimate of its explosion age via proper motion of its fast ejecta. In many cases HST has been uniquely capable in providing the observations required to constrain these parameters for, e.g., Cassiopeia A and 1E 0102.2-7219. Here we request three orbits of HST time to investigate the young, oxygen-rich supernova remnant N132D in a similar manner. These observations will fulfill the need for a comprehensive measurement of proper motion of its ejecta around the entire remnant. They will also complement an approved Chandra Legacy 900 ks observation and a recently developed high resolution 3D reconstruction of the remnant. This program will obtain new ACS Wide Field Camera images of the supernova remnant N132D in the LMC using the F475W and F502N filters. We require deep exposures sensitive to faint emission from the [O III] 4959, 5007 lines. Our data will be compared to archival images obtained in programs 12001 (ACS/WCS/F475W) and 5365 (WFPC2/PC/F502N) to measure proper motion in the ejecta. The remnant is 2.5 arcminutes in diameter so we must center it between the chip gaps. We have placed constraints on roll angle to minimize geometric distortion across the images across epochs. This program also obtains new WFC3/IR/F164N images. No prior images exist in this filter. We are looking to map [Si I] and [Fe II] emission around 1.64 microns. Our observing strategy is optimally configured to detect faint, diffuse emission in one orbit. Prof. Dan Milisavljevic is an expert in multiwavelength observations and interpretations of supernovae and supernova remnants, old supernovae, exotic supernovae, other exotic transients, and their progenitors. Charles Law is a graduate student at the Harvard-Smithsonian Center for Astrophysics. He has substantial experience analyzing optical observations of massive stars and supernova remnants. Dr. Paul Plucinsky is a Senior Astrophysicist in the Chandra X-ray Center at the Harvard-Smithsonian Center for Astrophysics. He is an expert on the ACIS instrument on Chandra and is the PI of the Chandra Cycle 20 Legacy program to observe N132D for 900 ks. Dr. Dan Patnaude is an Astrophysicist at the Chandra X-ray Center at the Harvard-Smithsonian Center for Astrophysics. He is an expert in multiwavelength observations of supernova remnants and has extensive experience in the modeling of supernova remnants under a variety of conditions. Dr. Niharika Sravan is a postdoctoral research associate at Purdue University. She is a theorist specializing in the modeling of progenitors of stripped-envelope supernovae. She is also an expert in applications of statistical methods and machine learning in astronomy. John Banovetz is a graduate student at Purdue University. He has substantial experience analyzing HST images and has conducted proper motion analyses of supernova remnant ejecta. Stellar Physics 6 false false false false false false false SUPPORTED EXT-MEDIUM SNR This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 ACS/WFC Imaging No No F475W ACS/WFC Imaging No No F502N WFC3/IR Imaging No No F164N POS-TARG DITHER 6.5 LINE 6.5 false false 68.14 4 18.39 ACS-WFC-DITHER-BOX 1 false POS-TARG DITHER 0.636 LINE false false 2 41.788 WFC3-IR-DITHER-LINE 2 false 1572962941064 /private/var/folders/qp/gy0fjcks2f5fk85bvtb3p4d80000gn/T/OPVisit4412748105185211941.xml The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. 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