----- Attempting Submission 1 (Tue Jul 01 22:17:04 GMT 2008) ----- Assigned ID: 284 ----- Attempting Submission 1 (Fri Mar 07 06:42:14 GMT 2008) ----- Phase I Proposal 284 (GO-q1317.apt) successfully submitted. ----- Attempting Submission 2 (Fri Mar 07 16:04:42 GMT 2008) ----- Phase I Proposal 284 (GO-q1317.apt) successfully submitted. Detailed Probing of a 3000 km/s Ly-alpha + Metal Line Absorption Complex Near Two Galaxies at z=0.67 At intermediate redshifts, Ly-alpha absorbers cluster around rich metal-line systems [those with numerous low and high ionization species (Bahcall et al.)], and at z=3, higher ionization clouds reside at the velocity extremes of clustered Ly-alpha lines, a signature of the physics of collapse and layered gas structures (Songaila & Cowie). These extraordinary HI environments provide unique astrophysical laboratories for probing relatively high overdensity IGM structures and for placing powerful constraints on our understanding of the intergalactic medium and extended galaxy halos in the context of structure evolution, galactic stellar feedback chemical enrichment to large galactocentric distances, and the cosmic baryon budget. We have undertaken a comprehensive study of the remarkable 1400 km/s velocity width, optically thin Ly-alpha only complex (five components) at z=0.67 within 1600 km/s of the Lyman limit z=0.66 metal-line system toward TON 153 (Churchill et al.). We have collected FOS, STIS, and HIRES quasar spectra covering the Lyman series, OVI, CIV, and MgII absorption, an F702W/WFPC-2 image, and set of ground based narrow-band SDSS filter images of the quasar field. Two galaxies aligned in velocity with the z=0.67 Ly-alpha complex and z=0.66 metal-line system lie within 100 kpc of the quasar sightline; the absorption is not consistent with our standard model of extended "halo" gas for either galaxy, which suggests that a large scale structure (i.e., filament) may extend between these galaxies. We propose to obtain G160M/1600 and G185M/1921+1941 (S/N>10) COS spectra of the z=1.01 quasar TON 153 to obtain detailed kinematic, chemical, and ionization conditions of this extraordinary absorber/galaxy system (total velocity spread 3000 km/s). The propose observations will provide an unprecedented first high resolution examination of the full Lyman series and MgII, CIV, and OVI metal lines arising in galaxy halos or a possible large scale structure (i.e., filament) asscociated with thoroughly studied galaxies. We aim to discern if the HI extends between the galaxies and test for multiphase absorption signatures suggestive of a galactic feedback or large scale collapsing structure.
The observing description here is slightly modified from, and supercedes, the description in the Phase I proposal. The object coordinates were otbtained from the SDSS aperture center for the spectrsocopy of the object. They coordinates are on the GSC2 reference frame and are accurate to better than 0.1", though we have specified FWHM=0.2". We plan to obtain FUV G160M/1600 and NUV G185M/1921 and G185M/1421 COS spectra of the QSO CSO 873 (TON 153, Q1317+277 [HB]). From the arhived FOS spectra, we measured UV fluxes of f_lambda = 6.9E-15 at 1570A (LL break), 6.5E-15 at 1700A} (Lybeta), and 7.9-15 at 2030A (Lyalpha} complex). We used the online COS ETC to estimate the exposure times require to obtain the required SNR. We sequence the observations so that the program can be implemented using 2 visits: Visit 1 (4 orbits) is the NUV observations and Visit 2 (5 orbits) is the FUV observations. For both visits, we use NUV ACQ-SEARCH followed by NUV ACQ-IMAGE. The exposures are 2 seconds, which delivers SNR=10 of the QSO. MIRROR B is required in order to not exceed the bright count rate limit. The ACQ-SEARCH observations use SCAN-SIZE=2 and STEP-SIZE=1.767". All spectroscopic observations will be through the PSA, and invoke TIME-TAG mode, manual FP-SPLIT, and FLASH=yes. From the COS-ETC, B_2/3 was always greater than the exposure times, so all BUFFER-TIMEs equal the exposure times. VISIT 1, ORBIT 1: Guide star aquisition, followed by observation 1-2, the acquisition images using MIRROR B. Shuttle to central wavelength 1921 of the G185M grating. Observations 3-4 are G185M/1921 spectroscopy of at FP-POS=3 (default) and FP-POS=4, respectively. One FP-POS forward movement. VISIT 1, ORBIT 2: Guide star acquisition. Observations 5-7 are G185M/1921 spectroscopy at FP-POS=1, FP-POS=2, and FP-POS=3, respectively. Initial FP-POS backward movement, followed by two FP-POS forward movements. VISIT 1, ORBIT 3: Shuttle to central wavelength 1941 of the G185M grating. Guide star acquisition. Observations 8-10 are G185M/1941 spectroscopy at FP-POS=3, FP-POS=4, and FP-POS=1, respectively. Two FP=POS foward movements, one FP-POS backward movement. VISIT 1, ORBIT 4: Guide star acquisition. Observations 11-13 are G185M/1941 spectroscopy at FP-POS=2, FP-POS=3, and FP-POS=4, respectively. Three FP-POS foward movements. VISIT 2, ORBIT 1: Guide star aquisition, followed by observation 1-2, the NUV acquisition images using MIRROR B. Shuttle OSM1 from NCM1 to central wavelength 1600 of the G160M grating. Observations 3-4 are G160/1600 spectroscopy of at FP-POS=3 (default) and FP-POS=4, respectively. One FP-POS forward movement. VISIT 2, ORBIT 2:Guide star acquisition. Observations 5-7 are G160M/1600 spectroscopy at FP-POS=1, FP-POS=2, and FP-POS=3, respectively. Initial FP-POS backward movement, followed by two FP-POS forward movements. VISIT 2, ORBIT 3: Guide star acquisition. Observations 8-10 are G160M/1600 spectroscopy at FP-POS=4, FP-POS=1, and FP-POS=2, respectively. Two FP=POS foward movements, one FP-POS backward movement. VISIT 2, ORBIT 4: Guide star acquisition. Observations 11-13 are G160M/1600 spectroscopy at FP-POS=3, FP-POS=4, and FP-POS=1, respectively. Two FP=POS foward movements, one FP-POS backward movement. VISIT 2, ORBIT 5: Guide star acquisition. Observations 14-16 are G160M/1600 spectroscopy at FP-POS=2, FP-POS=3, and FP-POS=4, respectively. Three FP=POS foward movements. QUASAR ABSORPTION LINES AND IGM 12 false 0.0 0.0 false false false false false SUPPORTED GALAXY QSO This object was first generated by the targetselector and retrieved from the NED database. The ICRS webpages state the the SDSS coordinate system is ICRS. The RA and DEC coordinates were then determined for the ICRS frame from spectroscopic observations of the object with SDSS (SDSS objID=587741722825719846). FUV f_lambda=6.9e-15; NUV f_lambda=7.9e-15 TON-0153 HB-Q1317+277 J2000 13 19 56.3000 +27 28 9.00 J2000 COS/NUV Spectroscopic No No G185M 1921 COS/NUV Spectroscopic No No G185M 1941 COS/FUV Spectroscopic No No G160M 1600 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. /tmp/OPVisit50003.xml (Tic-Visit :proposal-id 11667 :visit-id "01" :proposal-version -1 :trans-version "20080624" :date "01-Jul-2008 16:15:00.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "32" :si-bright-earth-limb-angle 20.0 :data-volume 878480 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11667 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11667 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2924 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11667 :visit-id "01" :orbit-number 2 :pcs-time 195 :si-vis-utilization 3072 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11667 :visit-id "01" :orbit-number 3 :pcs-time 195 :si-vis-utilization 3072 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11667 :visit-id "01" :orbit-number 4 :pcs-time 195 :si-vis-utilization 3072 :al-overhead-at-end 0 :internal-dur-at-end 428 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) true 4 0 Exposure Time 16 sec gives SNR=10 (default settings of COS ETC). MIRROR B required to avoid bright limit. Exposure Time gives SNR=10; MIRROR B required to not exceed bright count limit First exposure at FP-POS=3 First and only exposure at FP-POS=4 first and only exposure at FP-POS=1 first and only observation at FP-POS=2 second exposure at FP-POS=3 First and only exposure at FP-POS=4 First an only exposure at FP-POS=1 First and only exposure at FP-POS=2 Second exposure at FP-POS=3 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. /tmp/OPVisit50004.xml (Tic-Visit :proposal-id 11667 :visit-id "02" :proposal-version -1 :trans-version "20080624" :date "01-Jul-2008 16:16:35.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 1113296 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11667 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11667 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2934 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11667 :visit-id "02" :orbit-number 2 :pcs-time 195 :si-vis-utilization 3072 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11667 :visit-id "02" :orbit-number 3 :pcs-time 195 :si-vis-utilization 3072 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11667 :visit-id "02" :orbit-number 4 :pcs-time 195 :si-vis-utilization 3072 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11667 :visit-id "02" :orbit-number 5 :pcs-time 195 :si-vis-utilization 3072 :al-overhead-at-end 0 :internal-dur-at-end 428 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3267 :pcs-gap 0 ) true 5 0 Exposure Time give SNR=10; MIRROR B required to avoid bright count limit Exposure time gives SNR=10; MIRROR B required to avoide bright count limit