0 Assigned ID: 974 ----- Attempting Submission 1 (Fri Apr 07 22:06:23 GMT 2017) ----- HST Phase I Proposal 974 (Abell1835_SBC.apt) successfully submitted. Receipt: # 974-1 Updated to a 4-point 4" dither pattern for most exposures. The F125LP observations are also packed into 4 visits instead of 5 by taking up nearly all of the available time before the SHADOW limit to simplify scheduling. -1340017446 ----- Attempting Submission 1 (Thu Jul 06 16:04:43 GMT 2017) ----- HST Phase II Proposal 15298 (Abell1835_SBC.apt) successfully submitted. Receipt: # 15298-1 ----- Attempting Submission 2 (Thu Jul 06 17:22:57 GMT 2017) ----- HST Phase II Proposal 15298 (Abell1835_SBC.apt) successfully submitted. Receipt: # 15298-2 ----- Attempting Submission 3 (Fri Jul 14 09:29:56 GMT 2017) ----- HST Phase II Proposal 15298 (Abell1835_SBC.apt) successfully submitted. Receipt: # 15298-3 ----- Attempting Submission 4 (Wed Jul 19 21:23:50 GMT 2017) ----- Galaxy clusters represent a unique laboratory for directly observing gas cooling and feedback due to their high masses and correspondingly high gas densities and temperatures. Cooling of X-ray gas observed in ~1/3 of clusters, known as cool-core clusters, should fuel star formation at prodigious rates, but such high levels of star formation are rarely observed. Feedback from active galactic nuclei (AGN) is a leading explanation for the lack of star formation in most cool clusters, and AGN power is sufficient to offset gas cooling on average. Nevertheless, some cool core clusters exhibit massive starbursts indicating that our understanding of cooling and feedback is incomplete. Observations of ~10^5 K coronal gas in cool core clusters through OVI emission offers a sensitive means of testing our understanding of cooling and feedback because OVI emission is a dominant coolant and sensitive tracer of shocked gas. Recently, Hayes et al. 2016 demonstrated that synthetic narrow-band imaging of OVI emission is possible through subtraction of long-pass filters with the ACS+SBC for targets at z=0.23-0.29. Here, we propose to use this exciting new technique to directly image coronal OVI emitting gas at high resolution in Abell 1835, a prototypical starbursting cool-core cluster at z=0.252. Abell 1835 hosts a strong cooling core, massive starburst, radio AGN, and at z=0.252, it offers a unique opportunity to directly image OVI at hi-res in the UV with ACS+SBC. With just 15 orbits of ACS+SBC imaging, the proposed observations will complete the existing rich multi-wavelength dataset available for Abell 1835 to provide new insights into cooling and feedback in clusters. We will obtain the first high resolution, synthetic narrow-band imaging of OVI emission from a strong cool core cluster with a central starburst and AGN. These observations will use a new technique to obtain synthetic narrow-band OVI images with the ACS+SBC for objects at z=0.23-0.28 resulting in an unprecedented view of cooling and feedback in the cluster. At z=0.252, the OVI 1031, 1037 doublet emission associated with Abell 1835 serendipitously falls at 1290 Ang, enabling synthetic narrow-band high resolution images of OVI emission with the ACS+SBC for this starbursting cool-core cluster. To obtain OVI images of Abell 1835 we will observe the OVI on-line filter, F125LP, and the off-line filter, F140LP with the ACS+SBC. While the F125LP bandpass does not include geocoronal HI Lya, it does include geocoronal OI emission at 1304 Ang. To minimize the backgrounds in the F125LP observations due to airglow, we will therefore observe F125LP in the portion of each orbit in orbital shadow which reduces OI 1304 Ang emission by a factor of ~150. Consequently, the dominant source of background will be Lya and UV continuum associated with the cluster. In addition, we request that our observations are scheduled so that the SBC amplifiers have been switched off for at least 24 hours. This cool-down period reduces the dark current of the detectors enabling more sensitive imaging outside of the cluster center where dark current will dominate the backgrounds. For the same reason, we will schedule our ACS+SBC observations in visits of no more than two orbits. We will carry out the observations with a 4" dither pattern to aid in artifact rejection and mitigate low-frequency flat fielding errors while maintaining 1/3 pixel sampling To directly measure the continuum contribution to the synthetic OVI narrow-band, we also require imaging in F150LP. When combined with the F140LP, this will enable observations of the UV continuum emission levels through a synthetic narrow-band in a line-free continuum region at an observed wavelength of ~1400 Ang. In order to place a 2-sigma limit on the presence of OVI emission with surface brightness corresponding to the observed star formation rate, we will require 12 ks of observation in each of F125LP, F140LP, and F150LP bands as discussed in the Phase I proposal. The BOT returned a warning due to object N526005398. This object is the target, Abell 1835 and the BOT adopts the observed integrated magnitude for the galaxy and assumes an SED of an O5V star. The actual SED of the galaxy is substantially redder and the object does not violate the bright limits. To verify this, we retrieved the GALEX magnitudes of Abell 1835 (aka N526005398) and found AB(fuv)=19.27 and AB(nuv)=19.07 confirming that the object posses no safety risk to the instrument. Cosmology Galaxies and the IGM 6 false true false false false false SUPPORTED CLUSTER OF GALAXIES BCM COOLING FLOW YES Starburst in AB1835 BCG 2MASXJ14010204+0252423 SDSSJ140102.07+025242.4 J2000 J2000 fuv=19.3 nuv=19.1 u=17.96, r=16.14 ACS/SBC Imaging No No F125LP ACS/SBC Imaging No No F140LP ACS/SBC Imaging No No F150LP ACS/SBC Imaging No No F125LP ACS/SBC Imaging No No F140LP ACS/SBC Imaging No No F150LP POS-TARG DITHER 4 LINE 4 false false 63.65 4 20.02 ACS-SBC-DITHER-BOX 1 false POS-TARG DITHER 4 LINE false false 2 44.4 ACS-SBC-DITHER-LINE 2 false 1500498511459 /private/var/folders/h3/vlk0w48x2rggbns970zbgh9c0000gn/T/OPVisit3601798045535713671.xml The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. We request that the visit is scheduled after the SBC amplifiers have been turned off for at least 24 hours in order to minimize dark current. If any additional exposure time is available because the guide star acquisition / re-acquisition are carried out in accultation, we request that this time is allocated to F150LP (Tic-Visit :proposal-id 15298 :visit-id "01" :proposal-version -1 :trans-version "20170613" :date "19-Jul-2017 17:08:30.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 222160 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15298 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15298 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2561 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset 0 :dark-utilization 1816 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15298 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2560 :al-overhead-at-end 0 :internal-dur-at-end 279 :dark-offset 0 :dark-utilization 1803 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 2 0 To minimize the dark current, please schedule after the ACS has been switched off for 24 hours To minimize the dark current, please schedule after the ACS has been switched off for 24 hours 1500498515806 /private/var/folders/h3/vlk0w48x2rggbns970zbgh9c0000gn/T/OPVisit3026299270914542952.xml The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. We request that the visit is scheduled after the SBC amplifiers have been turned off for at least 24 hours in order to minimize dark current. If any additional exposure time is available because the guide star acquisition / re-acquisition are carried out in accultation, we request that this time is allocated to F150LP (Tic-Visit :proposal-id 15298 :visit-id "02" :proposal-version -1 :trans-version "20170613" :date "19-Jul-2017 17:08:35.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 222160 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15298 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15298 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2561 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset 0 :dark-utilization 1816 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15298 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2560 :al-overhead-at-end 0 :internal-dur-at-end 279 :dark-offset 0 :dark-utilization 1803 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 2 0 To minimize the dark current, please schedule after the ACS has been switched off for 24 hours To minimize the dark current, please schedule after the ACS has been switched off for 24 hours 1500498521125 /private/var/folders/h3/vlk0w48x2rggbns970zbgh9c0000gn/T/OPVisit2645901452899667690.xml The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. We request that the visit is scheduled after the SBC amplifiers have been turned off for at least 24 hours in order to minimize dark current. If any additional exposure time is available because the guide star acquisition / re-acquisition are carried out in accultation, we request that this time is allocated to F150LP in orbit 1 and F140LP in orbit 2. (Tic-Visit :proposal-id 15298 :visit-id "03" :proposal-version -1 :trans-version "20170613" :date "19-Jul-2017 17:08:40.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 222160 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15298 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15298 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2561 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset 0 :dark-utilization 1816 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15298 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2561 :al-overhead-at-end 0 :internal-dur-at-end 279 :dark-offset 0 :dark-utilization 1803 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 2 0 To minimize the dark current, please schedule after the ACS has been switched off for 24 hours To minimize the dark current, please schedule after the ACS has been switched off for 24 hours 1500498526201 /private/var/folders/h3/vlk0w48x2rggbns970zbgh9c0000gn/T/OPVisit5075663192759072031.xml The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. We request that the visit is scheduled after the SBC amplifiers have been turned off for at least 24 hours in order to minimize dark current. If any additional exposure time is available because the guide star acquisition / re-acquisition are carried out in accultation, we request that this time is allocated to F140LP (Tic-Visit :proposal-id 15298 :visit-id "04" :proposal-version -1 :trans-version "20170613" :date "19-Jul-2017 17:08:45.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 222160 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15298 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15298 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2560 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset 0 :dark-utilization 1816 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15298 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2560 :al-overhead-at-end 0 :internal-dur-at-end 279 :dark-offset 0 :dark-utilization 1798 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 2 0 To minimize the dark current, please schedule after the ACS has been switched off for 24 hours To minimize the dark current, please schedule after the ACS has been switched off for 24 hours 1500498535113 /private/var/folders/h3/vlk0w48x2rggbns970zbgh9c0000gn/T/OPVisit5570239992133292383.xml The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. We request that the visit is scheduled after the SBC amplifiers have been turned off for at least 24 hours in order to minimize dark current. (Tic-Visit :proposal-id 15298 :visit-id "05" :proposal-version -1 :trans-version "20170613" :date "19-Jul-2017 17:08:55.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 148112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15298 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15298 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2868 :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 3202 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15298 :visit-id "05" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2977 :al-overhead-at-end 0 :internal-dur-at-end 198 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 2 0 1500498539549 /private/var/folders/h3/vlk0w48x2rggbns970zbgh9c0000gn/T/OPVisit315065383245425394.xml The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. We request that the visit is scheduled after the SBC amplifiers have been turned off for at least 24 hours in order to minimize dark current. (Tic-Visit :proposal-id 15298 :visit-id "06" :proposal-version -1 :trans-version "20170613" :date "19-Jul-2017 17:08:59.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 148112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15298 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15298 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2868 :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 3202 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15298 :visit-id "06" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2977 :al-overhead-at-end 0 :internal-dur-at-end 198 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 2 0 1500498543592 /private/var/folders/h3/vlk0w48x2rggbns970zbgh9c0000gn/T/OPVisit1899035812976149447.xml The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. We request that the visit is scheduled after the SBC amplifiers have been turned off for at least 24 hours in order to minimize dark current. (Tic-Visit :proposal-id 15298 :visit-id "07" :proposal-version -1 :trans-version "20170613" :date "19-Jul-2017 17:09:03.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 148112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15298 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15298 :visit-id "07" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2868 :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 3202 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15298 :visit-id "07" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2977 :al-overhead-at-end 0 :internal-dur-at-end 198 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 2 0 1500498548961 /private/var/folders/h3/vlk0w48x2rggbns970zbgh9c0000gn/T/OPVisit5324084299739528087.xml The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. We request that the visit is scheduled after the SBC amplifiers have been turned off for at least 24 hours in order to minimize dark current. (Tic-Visit :proposal-id 15298 :visit-id "08" :proposal-version -1 :trans-version "20170613" :date "19-Jul-2017 17:09:08.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 148112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15298 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15298 :visit-id "08" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2866 :al-overhead-at-end 0 :internal-dur-at-end 198 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) true 1 0