Scientific Category is a required field. Science Keywords: Select from 2 to 5 items. Small GO Proposals are not allowed in Cycle 26 unless they are Joint Programs. US Admin CoI is a required field. Please specify your scheduling constraints or 'No Constraints' on all Observation forms. 0 Assigned ID: 46 ----- Attempting Submission 1 (Thu Aug 02 13:16:50 GMT 2018) ----- Joint Chandra/HST FLASH level may be too low for this exposure or a short subexposure. See extended explanation in the diagnostic browser FLASH level may be too low for this exposure or a short subexposure. See extended explanation in the diagnostic browser FLASH level may be too low for this exposure or a short subexposure. See extended explanation in the diagnostic browser In summary, we will observe NGC2276 in five filters, one filter and four (dithered) exposures per orbit. We have discussed the UV filter background warnings with an HST scientist and have come to a satisfactory solution. We updated the APT to very slightly decrease the exposure times to accommodate the increased guide star acquisition time, as requested. (Dec. 6, 2018) 1924189409 ----- Attempting Submission 1 (Wed Sep 19 13:29:02 GMT 2018) ----- ----- Attempting Submission 2 (Thu Dec 06 16:50:28 GMT 2018) ----- We have discussed this with a HST scientist and added the appropriate post-flashes to increase the background to a minimum of 12 e-/pix (there is additional galactic background from NGC 2276). Using Star Formation in NGC 2276 as an X-ray Binary Chronometer We propose joint Chandra/HST observations (Chandra: 150 ks) of NGC 2276 to obtain a complete picture of its luminous high-mass X-ray binary (HMXB) population. Interaction of NGC 2276 with the intergalac- tic medium has ignited a recent, asymmetric burst of star formation. There is tantalizing evidence in existing observations that this asymmetry is also seen in the luminosity distributions of HMXBs. Because the star formation rate and metallicity are similar across the galaxy, this galaxy provides a unique envi- ronment to test differences in the HMXB populations with age. This way we will directly test population synthesis models that predict specific timescales for the formation rate of HMXBs in different ages. The goal of this program is to study the age distribution of bright X-ray binaries by matching them to their nearby host star clusters. We will measure the ages of star clusters using SED fitting of five WFC3-UVIS bands, one orbit each: F275W, F336W, F438W, F555W, and F814W. We image the entire galaxy in one pointing per filter regardless of the roll angle, though we use a standard 4-point dither pattern to fill in chip gaps, subsample the PSF, reject cosmic rays and bad columns, etc. The APT gives a low background warning (for mitigating CTE losses) for our UV filters: F275W, F336W, F438W. Using a previous HST observation, we have determined that the NGC2276 galactic background in our regions of interest will be at least double that in the blank sky background. Accordingly, we have added post-flash to our F275W and F336W observations but do not need post-flash for our F438W observations. In summary when taking into account overheads and visibility, this results in 718 seconds per exposure for F814W, F555W, and F438W and 714 seconds per exposure for F336W and F275W. 6 false false false false false false false SUPPORTED GALAXY ACCRETION DISK SPIRAL STAR FORMING REGION STARBURST This object was generated by the targetselector and retrieved from the SIMBAD database. The center of the field was adjusted in order to ensure full coverage of the galaxy regardless of roll angle. J2000 J2000 WFC3/UVIS Imaging No No F275W WFC3/UVIS Imaging No No F336W WFC3/UVIS Imaging No No F438W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W POS-TARG MOSAIC DITHER 2 2.4 WFC3-UVIS-MOS-DITH-LINE false true 0.119 2 85.754 POS-TARG WFC3-UVIS-MOS-DITH-LINE 33.606 1 true /private/var/folders/dw/4qd20hfd0917br2gc_y3x2800000gn/T/OPVisit10194700600964142304.xml The scheduling data was generated by CASM 26.2.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15615 :visit-id "01" :proposal-version -1 :trans-version "20181130" :date "06-Dec-2018 17:01:29.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15615 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15615 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3204 :al-overhead-at-end 116 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3540 :pcs-gap 0 ) true 1 0 /private/var/folders/dw/4qd20hfd0917br2gc_y3x2800000gn/T/OPVisit9235511068917992763.xml The scheduling data was generated by CASM 26.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15615 :visit-id "02" :proposal-version -1 :trans-version "20181130" :date "06-Dec-2018 17:02:23.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15615 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15615 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3204 :al-overhead-at-end 116 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3540 :pcs-gap 0 ) true 1 0 /private/var/folders/dw/4qd20hfd0917br2gc_y3x2800000gn/T/OPVisit8551637811822758136.xml The scheduling data was generated by CASM 26.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15615 :visit-id "03" :proposal-version -1 :trans-version "20181130" :date "06-Dec-2018 17:02:29.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15615 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15615 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3204 :al-overhead-at-end 116 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3540 :pcs-gap 0 ) true 1 0 The regions of the target galaxy background will have >=12 e-/pix in this filter. No post-flash is needed. /private/var/folders/dw/4qd20hfd0917br2gc_y3x2800000gn/T/OPVisit14714527513250432398.xml The scheduling data was generated by CASM 26.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15615 :visit-id "04" :proposal-version -1 :trans-version "20181130" :date "06-Dec-2018 17:02:56.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15615 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15615 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3206 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3540 :pcs-gap 0 ) true 1 0 A post-flash has been added so that the regions of interest on the galaxy will have >=12 e-/pix. /private/var/folders/dw/4qd20hfd0917br2gc_y3x2800000gn/T/OPVisit11480426967286989516.xml The scheduling data was generated by CASM 26.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 15615 :visit-id "05" :proposal-version -1 :trans-version "20181130" :date "06-Dec-2018 17:03:14.0" :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 1154976 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15615 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15615 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3206 :al-overhead-at-end 122 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3540 :pcs-gap 0 ) true 1 0 A post-flash has been added so that the regions of interest on the galaxy will have >=12 e-/pix.