11667( 2) - 02-Jul-2008 12:05:00 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11667 Version: 2 Check-in Time: 02-Jul-2008 12:05:00 STScI Edit Number: 0 Title Detailed Probing of a 3000 km/s Ly-alpha + Metal Line Absorption Complex Near Two Galaxies at z=0.67 ------------------------------------------------------------------------------------ Type Cycle GO 17 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Christopher W. Churchill New Mexico State University CoI: Mr. Glenn G. Kacprzak New Mexico State University N CoI: Prof. Charles C. Steidel California Institute of Technology N CoI: Ms. Jessica L. Evans New Mexico State University N CoI: Dr. Anatoly Klypin New Mexico State University N ------------------------------------------------------------------------------------ Abstract 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. ------------------------------------------------------------------------------------ Observations Description ------------------------ The observing description here is slightly modified from, and supercedes, the 11667( 2) - 02-Jul-2008 12:05:00 - [ 2] 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 11667( 2) - 02-Jul-2008 12:05:00 - [ 3] 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. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 11667( 2) - 02-Jul-2008 12:05:00 - [ 4] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 CSO-0873 GALAXY, QSO RA=13H19M56.2388S +/- 0.2", J2000 Z = V = 16.0 +/- 0.2 FUV f_lambda=6.9e-15; DEC=+27D28'8.22" +/- 0.2" 1.022 NUV f_lambda=7.9e-15 Reference Frame: ICRS Comments: 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). ------------------------------------------------------------------------------------------------------------------------------------ 11667( 2) - 02-Jul-2008 12:05:00 - [ 5] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 CSO-0873 COS/NUV ACQ/SEA PSA MIRRORB SCAN-SIZE=2, STEP-SIZE=1.767 1 2 S SEQ 1-4 NON-INT RCH Comments: Exposure Time 16 sec gives SNR=10 (default settings of COS ETC). MIRROR B required to avoid bright limit. ------------------------------------------------------------------------------------------------------------------------------------ 2 CSO-0873 COS/NUV ACQ/IMA PSA MIRRORB 1 2 S GE Comments: Exposure Time gives SNR=10; MIRROR B required to not exceed bright count limit ------------------------------------------------------------------------------------------------------------------------------------ 3 CSO-0873 COS/NUV TIME-TA PSA G185M 1921 FP-POS=3, BUFFER-TIME=1112, 1 1112 S G FLASH=YES Comments: First exposure at FP-POS=3 ------------------------------------------------------------------------------------------------------------------------------------ 4 CSO-0873 COS/NUV TIME-TA PSA G185M 1921 FP-POS=4, BUFFER-TIME=1112, 1 1112 S G FLASH=YES Comments: First and only exposure at FP-POS=4 ------------------------------------------------------------------------------------------------------------------------------------ 5 CSO-0873 COS/NUV TIME-TA PSA G185M 1921 FP-POS=1, BUFFER-TIME=915, 1 915 S SEQ 5-7 NON-INT G FLASH=YES Comments: first and only exposure at FP-POS=1 ------------------------------------------------------------------------------------------------------------------------------------ 6 CSO-0873 COS/NUV TIME-TA PSA G185M 1921 FP-POS=2, BUFFER-TIME=914, 1 914 S G FLASH=YES Comments: first and only observation at FP-POS=2 ------------------------------------------------------------------------------------------------------------------------------------ 7 CSO-0873 COS/NUV TIME-TA PSA G185M 1921 FP-POS=3, BUFFER-TIME=914, 1 914 S G FLASH=YES Comments: second exposure at FP-POS=3 ------------------------------------------------------------------------------------------------------------------------------------ 8 CSO-0873 COS/NUV TIME-TA PSA G185M 1941 FP-POS=3, BUFFER-TIME=892, 1 892 S SEQ 8-10 NON-INT G FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 9 CSO-0873 COS/NUV TIME-TA PSA G185M 1941 FP-POS=4, BUFFER-TIME=892, 1 892 S G FLASH=YES Comments: First and only exposure at FP-POS=4 ------------------------------------------------------------------------------------------------------------------------------------ 10 CSO-0873 COS/NUV TIME-TA PSA G185M 1941 FP-POS=1, BUFFER-TIME=892, 1 892 S G FLASH=YES Comments: First an only exposure at FP-POS=1 ------------------------------------------------------------------------------------------------------------------------------------ 11667( 2) - 02-Jul-2008 12:05:00 - [ 6] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 11 CSO-0873 COS/NUV TIME-TA PSA G185M 1941 FP-POS=2, BUFFER-TIME=915, 1 915 S SEQ 11-13 NON-INT G FLASH=YES Comments: First and only exposure at FP-POS=2 ------------------------------------------------------------------------------------------------------------------------------------ 12 CSO-0873 COS/NUV TIME-TA PSA G185M 1941 FP-POS=3, BUFFER-TIME=914, 1 914 S G FLASH=YES Comments: Second exposure at FP-POS=3 ------------------------------------------------------------------------------------------------------------------------------------ 13 CSO-0873 COS/NUV TIME-TA PSA G185M 1941 FP-POS=4, BUFFER-TIME=914, 1 914 S G FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ CSO-0873 1 COS/NUV ACQ/SEA PSA MIRRORB none none none none 1 N/A RCH CSO-0873 2 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE CSO-0873 3 COS/NUV TIME-TA PSA G185M 1921 none none none none 1 N/A G CSO-0873 4 COS/NUV TIME-TA PSA G185M 1921 none none none none 1 N/A G CSO-0873 5 COS/NUV TIME-TA PSA G185M 1921 none none none none 2 N/A G CSO-0873 6 COS/NUV TIME-TA PSA G185M 1921 none none none none 2 N/A G CSO-0873 7 COS/NUV TIME-TA PSA G185M 1921 none none none none 2 N/A G CSO-0873 8 COS/NUV TIME-TA PSA G185M 1941 none none none none 3 N/A G CSO-0873 9 COS/NUV TIME-TA PSA G185M 1941 none none none none 3 N/A G CSO-0873 10 COS/NUV TIME-TA PSA G185M 1941 none none none none 3 N/A G CSO-0873 11 COS/NUV TIME-TA PSA G185M 1941 none none none none 4 N/A G CSO-0873 12 COS/NUV TIME-TA PSA G185M 1941 none none none none 4 N/A G CSO-0873 13 COS/NUV TIME-TA PSA G185M 1941 none none none none 4 N/A G 11667( 2) - 02-Jul-2008 12:05:00 - [ 7] Visit: 02 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 CSO-0873 COS/NUV ACQ/SEA PSA MIRRORB SCAN-SIZE=2, STEP-SIZE=1.767 1 2 S SEQ 1-4 NON-INT RCH Comments: Exposure Time give SNR=10; MIRROR B required to avoid bright count limit ------------------------------------------------------------------------------------------------------------------------------------ 2 CSO-0873 COS/NUV ACQ/IMA PSA MIRRORB 1 2 S GE Comments: Exposure time gives SNR=10; MIRROR B required to avoide bright count limit ------------------------------------------------------------------------------------------------------------------------------------ 3 CSO-0873 COS/FUV TIME-TA PSA G160M 1600 FP-POS=3, SEGMENT=BOTH, 1 1093 S G BUFFER-TIME=1093, FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 4 CSO-0873 COS/FUV TIME-TA PSA G160M 1600 FP-POS=4, SEGMENT=BOTH, 1 1094 S G BUFFER-TIME=1094, FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 5 CSO-0873 COS/FUV TIME-TA PSA G160M 1600 FP-POS=1, SEGMENT=BOTH, 1 950 S SEQ 5-7 NON-INT G BUFFER-TIME=950, FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 6 CSO-0873 COS/FUV TIME-TA PSA G160M 1600 FP-POS=2, SEGMENT=BOTH, 1 950 S G BUFFER-TIME=950, FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 7 CSO-0873 COS/FUV TIME-TA PSA G160M 1600 FP-POS=3, SEGMENT=BOTH, 1 732 S G BUFFER-TIME=732, FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 8 CSO-0873 COS/FUV TIME-TA PSA G160M 1600 FP-POS=4, SEGMENT=BOTH, 1 735 S SEQ 8-10 NON-INT G BUFFER-TIME=735, FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 9 CSO-0873 COS/FUV TIME-TA PSA G160M 1600 FP-POS=1, SEGMENT=BOTH, 1 915 S G BUFFER-TIME=915, FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 10 CSO-0873 COS/FUV TIME-TA PSA G160M 1600 FP-POS=2, SEGMENT=BOTH, 1 915 S G BUFFER-TIME=915, FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 11 CSO-0873 COS/FUV TIME-TA PSA G160M 1600 FP-POS=3, SEGMENT=BOTH, 1 730 S SEQ 11-13 NON-INT G BUFFER-TIME=730, FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 12 CSO-0873 COS/FUV TIME-TA PSA G160M 1600 FP-POS=4, SEGMENT=BOTH, 1 730 S G BUFFER-TIME=730, FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 13 CSO-0873 COS/FUV TIME-TA PSA G160M 1600 FP-POS=1, SEGMENT=BOTH, 1 1105 S G BUFFER-TIME=1105, FLASH=YES 11667( 2) - 02-Jul-2008 12:05:00 - [ 8] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ 14 CSO-0873 COS/FUV TIME-TA PSA G160M 1600 FP-POS=2, SEGMENT=BOTH, 1 1172 S SEQ 14-16 NON-INT G BUFFER-TIME=1172, FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 15 CSO-0873 COS/FUV TIME-TA PSA G160M 1600 FP-POS=3, SEGMENT=BOTH, 1 730 S G BUFFER-TIME=730, FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 16 CSO-0873 COS/FUV TIME-TA PSA G160M 1600 FP-POS=4, SEGMENT=BOTH, 1 730 S G BUFFER-TIME=730, FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ CSO-0873 1 COS/NUV ACQ/SEA PSA MIRRORB none none none none 1 N/A RCH CSO-0873 2 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE CSO-0873 3 COS/FUV TIME-TA PSA G160M 1600 none none none none 1 N/A G CSO-0873 4 COS/FUV TIME-TA PSA G160M 1600 none none none none 1 N/A G CSO-0873 5 COS/FUV TIME-TA PSA G160M 1600 none none none none 2 N/A G CSO-0873 6 COS/FUV TIME-TA PSA G160M 1600 none none none none 2 N/A G CSO-0873 7 COS/FUV TIME-TA PSA G160M 1600 none none none none 2 N/A G CSO-0873 8 COS/FUV TIME-TA PSA G160M 1600 none none none none 3 N/A G CSO-0873 9 COS/FUV TIME-TA PSA G160M 1600 none none none none 3 N/A G CSO-0873 10 COS/FUV TIME-TA PSA G160M 1600 none none none none 3 N/A G CSO-0873 11 COS/FUV TIME-TA PSA G160M 1600 none none none none 4 N/A G CSO-0873 12 COS/FUV TIME-TA PSA G160M 1600 none none none none 4 N/A G CSO-0873 13 COS/FUV TIME-TA PSA G160M 1600 none none none none 4 N/A G CSO-0873 14 COS/FUV TIME-TA PSA G160M 1600 none none none none 5 N/A G CSO-0873 15 COS/FUV TIME-TA PSA G160M 1600 none none none none 5 N/A G 11667( 2) - 02-Jul-2008 12:05:00 - [ 9] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ CSO-0873 16 COS/FUV TIME-TA PSA G160M 1600 none none none none 5 N/A G 11667( 2) - 02-Jul-2008 12:05:00 - [ 10] Summary Form for Proposal 11667 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, ACQ/SEARCH, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=1093, BUFFER-TIME=1094, BUFFER-TIME=1105, BUFFER-TIME=1112, BUFFER-TIME=1172, BUFFER-TIME=730, BUFFER-TIME=732, BUFFER-TIME=735, BUFFER-TIME=892, BUFFER-TIME=914, BUFFER-TIME=915, BUFFER-TIME=950, FLASH=YES, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4, SCAN-SIZE=2, SEGMENT=BOTH, STEP-SIZE=1.767 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SEQ 1-4 NON-INT, SEQ 11-13 NON-INT, SEQ 14-16 NON-INT, SEQ 5-7 NON-INT, SEQ 8-10 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G160M, G185M, MIRRORB ------------------------------------------------------------------------------------------------------------------------------------ Target Names CSO-0873 ------------------------------------------------------------------------------------------------------------------------------------