12214( 2) - 07-Jul-2010 18:39:15 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12214 Version: 2 Check-in Time: 07-Jul-2010 18:39:15 STScI Edit Number: 0 Title Low redshift damped Lyman alpha systems selected by 21cm absorption: A new route to high efficiency? ------------------------------------------------------------------------------------ Type Cycle GO 18 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Sara Ellison University of Victoria CoI: Dr. Nissim Kanekar National Centre for Radio Astrophysics, N TIFR CoI: Dr. Jason X. Prochaska University of California - Santa Cruz N ------------------------------------------------------------------------------------ Abstract The identification of z<1.6 damped Lyman alpha (DLA) systems requires UV spectroscopy, but blind surveys are less than 10% efficient at finding them, making low z DLA surveys unpalatable for precious HST resources. Pre-selecting QSOs which exhibit strong intervening MgII absorption has increased the detection effiency to 35%. However, the last survey for low z DLAs was carried out 8 years ago and (combined with previous archival data) still only yielded 41 DLAs, compared to ~1000 known systems at z>2. In this proposal, we aim to test a new selection technique, whereby we pre-select DLA candidates towards radio-loud QSOs which exhibit both MgII absorption AND 21cm absorption in optical and radio spectra respectively We expect this technique to be close to 100% efficient, but UV spectroscopy is the final step in the proof of concept. In this short pilot proposal we will observe five 21cm absorbers to confirm their DLA nature and pave the way for larger samples in the future. These data will also yield 5 new temperature measurements of the ISM in the 1 On Hold Comments: Additional Comments: This visit to observe Lyman alpha in absorption at z=1.37, so the feature is at 2881 A. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 UM-305 COS/NUV ACQ/IMA PSA MIRRORA 1 15 S GE ------------------------------------------------------------------------------------------------------------------------------------ 2 UM-305 COS/NUV TIME-TA PSA G230L 2950 FP-POS=3, BUFFER-TIME=1227, 1 1227 S G FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 3 UM-305 COS/NUV TIME-TA PSA G230L 2950 FP-POS=4, BUFFER-TIME=1227, 1 1227 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 | ------------------------------------------------------------------------------------------------------------------------------------ UM-305 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE UM-305 2 COS/NUV TIME-TA PSA G230L 2950 none none none none 1 N/A G UM-305 3 COS/NUV TIME-TA PSA G230L 2950 none none none none 1 N/A G 12214( 2) - 07-Jul-2010 18:39:15 - [ 5] Visit: 02 Visit Requirements: On Hold Comments: Additional Comments: This visit to observe Lyman alpha in absorption at z=1.19, so the feature is at 2662 A. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 B0801+303 COS/NUV ACQ/IMA PSA MIRRORA 1 40 S GE ------------------------------------------------------------------------------------------------------------------------------------ 2 B0801+303 COS/NUV TIME-TA PSA G230L 2635 FP-POS=3, BUFFER-TIME=2593, 1 2593 S G FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 3 B0801+303 COS/NUV TIME-TA PSA G230L 2635 FP-POS=4, BUFFER-TIME=3026, 1 3026 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 | ------------------------------------------------------------------------------------------------------------------------------------ B0801+303 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE B0801+303 2 COS/NUV TIME-TA PSA G230L 2635 none none none none 1 N/A G B0801+303 3 COS/NUV TIME-TA PSA G230L 2635 none none none none 2 N/A G 12214( 2) - 07-Jul-2010 18:39:15 - [ 6] Visit: 03 Visit Requirements: On Hold Comments: Additional Comments: This visit to observe Lyman alpha in absorption at z=1.33, so the feature is at 2833 A. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HB89-1430-1 COS/NUV ACQ/IMA PSA MIRRORA 1 80 S 78 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 HB89-1430-1 COS/NUV TIME-TA PSA G230L 2950 FP-POS=3, BUFFER-TIME=2487, 1 2487 S 78 G FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 3 HB89-1430-1 COS/NUV TIME-TA PSA G230L 2950 FP-POS=3, BUFFER-TIME=3000, 1 3000 S 78 G FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 4 HB89-1430-1 COS/NUV TIME-TA PSA G230L 2950 FP-POS=3, BUFFER-TIME=3000, 1 3000 S 78 G FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 5 HB89-1430-1 COS/NUV TIME-TA PSA G230L 2950 FP-POS=4, BUFFER-TIME=3000, 1 3000 S 78 G FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 6 HB89-1430-1 COS/NUV TIME-TA PSA G230L 2950 FP-POS=4, BUFFER-TIME=3000, 1 3000 S 78 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 | ------------------------------------------------------------------------------------------------------------------------------------ HB89-1430-178 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE HB89-1430-178 2 COS/NUV TIME-TA PSA G230L 2950 none none none none 1 N/A G HB89-1430-178 3 COS/NUV TIME-TA PSA G230L 2950 none none none none 2 N/A G HB89-1430-178 4 COS/NUV TIME-TA PSA G230L 2950 none none none none 3 N/A G HB89-1430-178 5 COS/NUV TIME-TA PSA G230L 2950 none none none none 4 N/A G HB89-1430-178 6 COS/NUV TIME-TA PSA G230L 2950 none none none none 5 N/A G 12214( 2) - 07-Jul-2010 18:39:15 - [ 7] Visit: 04 Visit Requirements: On Hold Comments: Additional Comments: This visit to observe Lyman alpha in absorption at z=1.34, so the feature is at 2845 A. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 J1623+0718 COS/NUV ACQ/IMA PSA MIRRORA 1 60 S GE ------------------------------------------------------------------------------------------------------------------------------------ 2 J1623+0718 COS/NUV TIME-TA PSA G230L 2950 FP-POS=3, BUFFER-TIME=2520, 1 2520 S G FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 3 J1623+0718 COS/NUV TIME-TA PSA G230L 2950 FP-POS=3, BUFFER-TIME=2993, 1 2993 S G FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 4 J1623+0718 COS/NUV TIME-TA PSA G230L 2950 FP-POS=4, BUFFER-TIME=2993, 1 2993 S G FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 5 J1623+0718 COS/NUV TIME-TA PSA G230L 2950 FP-POS=4, BUFFER-TIME=2993, 1 2993 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1623+0718 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE J1623+0718 2 COS/NUV TIME-TA PSA G230L 2950 none none none none 1 N/A G J1623+0718 3 COS/NUV TIME-TA PSA G230L 2950 none none none none 2 N/A G J1623+0718 4 COS/NUV TIME-TA PSA G230L 2950 none none none none 3 N/A G J1623+0718 5 COS/NUV TIME-TA PSA G230L 2950 none none none none 4 N/A G 12214( 2) - 07-Jul-2010 18:39:15 - [ 8] Visit: 05 Visit Requirements: On Hold Comments: Additional Comments: This visit to observe Lyman alpha in absorption at z=1.17, so the feature is at 2638 A. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HB89-2355-1 COS/NUV ACQ/IMA PSA MIRRORA 1 90 S 06 GE ------------------------------------------------------------------------------------------------------------------------------------ 2 HB89-2355-1 COS/NUV TIME-TA PSA G230L 2635 FP-POS=3, BUFFER-TIME=2463, 1 2463 S 06 G FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 3 HB89-2355-1 COS/NUV TIME-TA PSA G230L 2635 FP-POS=3, BUFFER-TIME=2996, 1 2996 S 06 G FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 4 HB89-2355-1 COS/NUV TIME-TA PSA G230L 2635 FP-POS=4, BUFFER-TIME=2996, 1 2996 S 06 G FLASH=YES ------------------------------------------------------------------------------------------------------------------------------------ 5 HB89-2355-1 COS/NUV TIME-TA PSA G230L 2635 FP-POS=4, BUFFER-TIME=2996, 1 2996 S 06 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 | ------------------------------------------------------------------------------------------------------------------------------------ HB89-2355-106 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE HB89-2355-106 2 COS/NUV TIME-TA PSA G230L 2635 none none none none 1 N/A G HB89-2355-106 3 COS/NUV TIME-TA PSA G230L 2635 none none none none 2 N/A G HB89-2355-106 4 COS/NUV TIME-TA PSA G230L 2635 none none none none 3 N/A G HB89-2355-106 5 COS/NUV TIME-TA PSA G230L 2635 none none none none 4 N/A G 12214( 2) - 07-Jul-2010 18:39:15 - [ 9] Summary Form for Proposal 12214 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=1227, BUFFER-TIME=2463, BUFFER-TIME=2487, BUFFER-TIME=2520, BUFFER-TIME=2593, BUFFER-TIME=2993, BUFFER-TIME=2996, BUFFER-TIME=3000, BUFFER-TIME=3026, FLASH=YES, FP-POS=3, FP-POS=4 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G230L, MIRRORA ------------------------------------------------------------------------------------------------------------------------------------ Target Names B0801+303, HB89-1430-178, HB89-2355-106, J1623+0718, UM-305 ------------------------------------------------------------------------------------------------------------------------------------