0 Assigned ID: 1200 ----- Attempting Submission 1 (Thu Jan 16 21:38:18 GMT 2020) ----- ----- Attempting Submission 2 (Sat Jan 18 04:42:55 GMT 2020) ----- The observations have been split into 3 visits. I've added two short WFC3/IR F110W observations to the previous Phase II submission. If this looks good from the instrument and scheduling perspective, we can go ahead and submit it to the queue. 1046967916 ----- Attempting Submission 1 (Fri Mar 06 03:39:06 GMT 2020) ----- HST Phase II Proposal 16072 successfully submitted. Receipt: # 16072-1 ----- Attempting Submission 2 (Mon Mar 16 23:38:27 GMT 2020) ----- Constraining the local environment and possible binarity of the closest-known Fast Radio Burst source Fast Radio Bursts (FRBs) are millisecond-timescale radio transients that originate at cosmological distances. The origins of FRBs are unknown, though a plethora of models invoking sources from young magnetars to binary neutron star mergers have been proposed. The environments in which these FRBs originate, the local stellar population age, metallicity, and star-formation rate can constrain the origins of FRBs. Some FRBs have been observed to repeat, though it is not clear whether the as-yet-single bursts are a different population or whether their faint repeat bursts simply have not been detected yet. There are six FRBs that have been localized with sufficient precision to identify their host galaxies in very diverse local environments, most at distances >1 Gpc. A second repeating FRB 180916 has been localized to a nearby face-on spiral galaxy at a distance of 149 Mpc, providing an opportunity to set the best constraints on the immediate environment of an FRB source. Separately, a 16.35-day periodicity has been discovered in the burst activity of FRB 180916 --- a momentous discovery for our understanding of FRBs. A modulation induced by orbital motion could feasibly explain such a period. The proposed observations are sufficiently sensitive to detect a single O3V (or brighter) star at the location of the FRB and measure the local star-formation rate with a precision of 0.01 MSun/year. These observations, along with previously acquired ground-based integral field spectroscopy will allow us to study the hyper-local environment of FRB 180916, its chemical composition, and dynamics, leading to the most detailed dataset to constrain the models for FRB emission. The aim of this observation is to acquire deep optical and IR imaging of the galaxy to search for stellar clusters or OB associations at the location of the FRB. The deep imaging will be done in the F110W filter (IR) and the Halpha On/Off imaging (to constrain local star formation rate) will be done in the F673N and F657N filters (UVIS). The host galaxy itself is about 10" in size and the region surrounding it (~20" radius) is of interest to search for satellite galaxies or any morphological signs of interaction. Apart from these constraints, the orientation, observation epoch etc are not critical. Dr. Shriharsh Tendulkar and Dr. Cees Bassa are experts in optical imaging and spectroscopic analysis and have led the analysis of the host of both localized repeating FRBs, FRB 121102 and FRB 180916 with Gemini Observatory as well as Hubble Space Telescope and Spitzer observations for FRB 121102. Dr. Aida Kirichenko is an expert in the optical studies of neutron stars and their companions. Dr. Shriharsh Tendulkar, Prof. Masui, Prof. Kaspi, Dr. Scholz, Dr. Fonseca and Mr. Bhardwaj are members of the CHIME/FRB collaboration. The team members are world leaders in the study of FRBs, magnetars, and neutron stars using multi-wavelength data. Stellar Physics and Stellar Types Stellar Populations and the Interstellar Medium 3 false false false false false false false SUPPORTED GALAXY SPIRAL J2000 J2000 WFC3/UVIS Imaging No No F673N WFC3/UVIS Imaging No No F657N WFC3/IR Imaging No No F110W POS-TARG DITHER 0.572 LINE 0.365 false false 74.653 4 18.528 WFC3-IR-DITHER-BOX-MIN 1 false POS-TARG DITHER 0.135 LINE false false 3 46.84 WFC3-UVIS-DITHER-LINE-3PT 3 false /private/var/folders/cm/7s0tnx_13s3f47w0g7npyljc0000gn/T/OPVisit12576008876856459107.xml The scheduling data was generated by CASM 28.0. CASM was run in Phase II mode. One visit for Halpha ON imaging (F673N) (Tic-Visit :proposal-id 16072 :visit-id "01" :proposal-version -1 :trans-version "20191203" :date "16-Mar-2020 16:35:23.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 866240 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16072 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16072 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3153 :al-overhead-at-end 122 :internal-dur-at-end 352 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3486 :pcs-gap 0 ) true 1 0 /private/var/folders/cm/7s0tnx_13s3f47w0g7npyljc0000gn/T/OPVisit5990082446807321280.xml The scheduling data was generated by CASM 28.0. CASM was run in Phase II mode. One visit for Halpha OFF (F657N) (Tic-Visit :proposal-id 16072 :visit-id "02" :proposal-version -1 :trans-version "20191203" :date "16-Mar-2020 16:35:25.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 866240 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16072 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16072 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3153 :al-overhead-at-end 122 :internal-dur-at-end 352 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3486 :pcs-gap 0 ) true 1 0 /private/var/folders/cm/7s0tnx_13s3f47w0g7npyljc0000gn/T/OPVisit16074658945599082328.xml The scheduling data was generated by CASM 28.0. CASM was run in Phase II mode. Two orbits for deep F110W imaging (Tic-Visit :proposal-id 16072 :visit-id "03" :proposal-version -1 :trans-version "20191203" :date "16-Mar-2020 16:35:37.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 2506880 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16072 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16072 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3132 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3486 :pcs-gap 0 ) (Tic-Orbit :proposal-id 16072 :visit-id "03" :orbit-number 2 :pcs-time 302 :si-vis-utilization 3173 :al-overhead-at-end 0 :internal-dur-at-end 690 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3486 :pcs-gap 0 ) true 2 0