0 Assigned ID: 871 ----- Attempting Submission 1 (Fri Apr 10 21:35:43 GMT 2015) ----- HST Phase I Proposal 871 (C23_GLIMPSE-C01.apt.2015_04_10_16_42.aptbackup) successfully submitted. Receipt: # 871-1 ORBITAL VISIBILITY OVERRUN FLASH level may be too high for this exposure or a long subexposure. See extended explanation in the diagnostic browser There will be enough stellar diffuse light in the field so that Flash level warning can be ignored. -20842804 ----- Attempting Submission 1 (Tue Jul 21 17:22:44 GMT 2015) ----- ----- Attempting Submission 2 (Wed Aug 26 20:25:08 GMT 2015) ----- There will be enough stellar diffuse light in the field so that Flash level warning can be ignored. The intermediate-age cluster GLIMPSE-C01 We propose multi-band HST observations of the most massive intermediate-age star cluster in the Galaxy GLIMPSE-C01. Considering the cluster's age, an unusually large number of X-ray sources has been detected in a previous Chandra program. In addition, extended X-ray emission was detected around GLIMPSE-C01 to spatially coincide with IR emission, indicating an ongoing interaction between the cluster and its environment. There is little information about the X-ray source population in intermediate age clusters. We will investigate the X-ray source population in GLIMPSE-C01 using our multiwavelength classification method to determine the nature of the X-ray sources in the cluster. This will enable us to study the X-ray binary evolution and history of the sources in GLIMPSE-C01. We request only one HST orbit to achieve this goal. We propose 1 HST orbit to study GLIMPSE-C01 - massive intermediate-age star cluster with half-light radius of 36". We will use the high dynamic range of WFC3/IR to study both the brightest as well as the faintest stars in GLIMPSE-C01. We will use both WFC3/UVIS and WFC3/IR to observe in four filters covering the range from 850 to 1600 Angstrom. All 3 exposures with WFC3/IR will use WFC3-IR-DITHER-LINE dither pattern with the pointing on the geometric center of the detector (Apeture = IR-FIX). The F127M exposure will be executed in mode NSAMP=15, SAM-SEQ=STEP25 for total of 548.47 s (2x 274.235 s). The other two IR exposures, F139M and F153M, will be executed in mode NSAMP=11, SAM-SEQ=STEP50 for total of 595.465 s (2x 299.232 s). The WFC3/UVIS exposure will use WFC3-UVIS-DITHER-LINE dither pattern. The two sub-exposures are split into 190 s and 350 s. We do not use CR-SPLITs to avoid the loss of observation time due to buffer dump. The Aperture will be set to UVIS1-FIX so that the star cluster falls on the geometric center of CCD1 and therefore the chip gap is avoided to prevent the loss of any significant to the program objects of falling onto the gap. The choice of dither patterns and the read sequences (for the IR detector) is dictated by the tradeoff between minimizing time loss due to the data dumps and reading the detector as fast as possible while constraining everything to be within a single orbit. RESOLVED STELLAR POPULATIONS 12 false false false false SUPPORTED STELLAR CLUSTER GLOBULAR CLUSTER NO J2000 J2000 WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F127M WFC3/IR Imaging No No F139M WFC3/IR Imaging No No F153M POS-TARG DITHER 1.2 LINE false false 2 46.84 WFC3-UVIS-DITHER-LINE 1 false POS-TARG DITHER 0.636 LINE false false 2 41.788 WFC3-IR-DITHER-LINE 2 false /private/var/folders/cd/x6sqxh9x51j54z8lb6t8257sjqmv6z/T/OPVisit5214740328094045254.xml The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14183 :visit-id "01" :proposal-version -1 :trans-version "20150609" :date "26-Aug-2015 14:53:51.0" :trans-errors '(:WARNINGS 1 :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 1970256 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14183 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14183 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2883 :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 3210 :pcs-gap 0 ) true 1 1