Please find attached an updated version of the phaseII for 14055. In the proposal description we asked for a 180 degree rotation between our two visits so that the diffraction spikes align. However, this wasn't coded directly into the phaseII, and it should be in this submission. 939119314 ----- Attempting Submission 1 (Tue Feb 24 20:44:49 GMT 2015) ----- ----- Attempting Submission 2 (Wed Jul 29 13:39:14 GMT 2015) ----- HST NIR observations of the currently active magnetar SGR 1935+2154 The newly discovered (2014, July 5) magnetar SGR 1935+2154 entered a burst active phase on 2015 February 22 and has been detected to emit at least 6 bursts in the last 48 hours. Very few magnetars have been detected in wavelengths other than X-rays, mostly because there is typically a large extinction along the line of sight. This particular source, however, is located in an uncrowded field with very low extinction and has therefore an excellent chance to be detected with the superb capabilities of HST. Such a detection would provide, besides a very accurate location, an unambiguous IR counterpart via photometric variability and establish the putative association of the source with a supernova remnant. A detection would also allow the determination (with future observations) of the proper motion of the source and thereby an estimate of the natal kick of the source. The proposed observations are likely to be extremely valuable for understanding the nature of these rare objects and their progenitors. We wish to obtain deep IR observations of the currently active magnetar SGR 1935+2154. We will use a single orbit of F140W observations and a standard 4-point dither to reach depths of AB~28 (3-sigma). We will repeat this observation ~6 months later (with the PA of the observation rotated by 180 degrees) in order perform a subtraction and search for variability in the sources within the X-ray error circle. HOT STARS 0 SUPPORTED STAR NEUTRON STAR J2000 WFC3/IR Imaging No No F140W WFC3/IR Imaging No No F140W POS-TARG DITHER 0.572 LINE 0.365 false false 74.653 4 18.528 WFC3-IR-DITHER-BOX-MIN 1 false The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. /private/var/folders/8d/jkscrd891rl041p94sl_wts40000gn/T/OPVisit5851466176764336892.xml 1425336969000 295.2197444968547 (Tic-Visit :proposal-id 14055 :visit-id "01" :proposal-version -1 :trans-version "20150609" :date "22-Jul-2015 21:09:41.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 905248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14055 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14055 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2624 :al-overhead-at-end 0 :internal-dur-at-end 671 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. /private/var/folders/8d/jkscrd891rl041p94sl_wts40000gn/T/OPVisit8897247411630990603.xml (Tic-Visit :proposal-id 14055 :visit-id "02" :proposal-version -1 :trans-version "20150609" :date "22-Jul-2015 21:09:24.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 905248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14055 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14055 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2624 :al-overhead-at-end 0 :internal-dur-at-end 671 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) true 1 0