13415( 4) - 26-Mar-2014 15:45:21 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13415 Version: 4 Check-in Time: 26-Mar-2014 15:45:21 STScI Edit Number: 1 Title The First Study of the Quasar Broad Line Region in the <550A Extreme UV ------------------------------------------------------------------------------------ Type Cycle GO 21 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. David Syphers University of Colorado at Boulder Y CoI: Prof. Scott F. Anderson University of Washington N CoI: Prof. J. Michael Shull University of Colorado at Boulder N CoI: Dr. Wei Zheng The Johns Hopkins University N ------------------------------------------------------------------------------------ Abstract Quasar emission in the extreme UV (EUV, blueward of the hydrogen Lyman limit) is poorly understood, and this is especially true for the shortest observable UV wavelengths (300-550A rest). In particular, although some emission lines have been seen at very low resolution, none have been rigorously identified or studied well. We here propose the first study to definitively identify and characterize emission lines in this wavelength regime. We will observe the brightest quasar showing clear emission lines in the EUV, and compare to extant spectra for other quasars lacking such strong emission, in order to: (1) explore quasar diversity, investigating why the quasar emission spectrum varies so much between objects in the EUV when it does not in the FUV through optical; (2) test photoionization models of the broad emission line region, particularly the existing tension between line production for helium and metal lines; (3) identify emission lines in this poorly understood wavelength regime, to enable inference of the underlying EUV spectral slope, important for quasar physics and ionization of the intergalactic medium. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will conduct a detailed study for extreme UV emission lines in our target, previously observed in the FUV only with extremely low resolution ACS/SBC prism spectra. Most of the data will be taken in G130M, with a mix of central wavelengths to maximize wavelength coverage of the most interesting features. Some G140L data will be taken for continuum calibration and to search for emission lines lying redward of the G130M coverage. Accurate SDSS coordinates allow us to use ACQ/IMAGE only to acquire the target (to S/N=40 for the given time). The target does not come close to violating overlight safety, and GALEX imaging directly verifies no nearby UV-bright objects. Real Time Justification ----------------------- Calibration Justification ------------------------- 13415( 4) - 26-Mar-2014 15:45:21 - [ 2] Additional Comments ------------------- ------------------------------------------------------------------------------------ 13415( 4) - 26-Mar-2014 15:45:21 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSS1006+370 GALAXY, HIGH REDSHIFT RA=10H06M10.5514S +/- 0.1", J2000 V = 17.8 f_lambda(1315A)=1.9e-16 (ACS 5 GALAXY, LYMAN ALPHA DEC=+37D05'13.86" +/- 0.1" prism spectrum) CLOUD, QUASAR Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 13415( 4) - 26-Mar-2014 15:45:21 - [ 4] 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSS1006+37 COS/NUV ACQ/IMA PSA MIRRORA 1 85 S (85 05 GE S) Comments: ACQ/IMAGE time estimated using the faintest NUV GALEX flux observed. ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSS1006+37 COS/FUV TIME-TA PSA G130M 1291 FP-POS=1, BUFFER-TIME=4833, 1 2200 S 05 G SEGMENT=BOTH see below (2447 S) Comments: ETC buffer time is 7250s. ------------------------------------------------------------------------------------------------------------------------------------ 3 SDSS1006+37 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=4833, 1 2200 S 05 G SEGMENT=BOTH see below (3001 S) Comments: ETC buffer time is 7250s. ------------------------------------------------------------------------------------------------------------------------------------ 4 SDSS1006+37 COS/FUV TIME-TA PSA G130M 1300 FP-POS=1, BUFFER-TIME=4833, 1 2900 S 05 G SEGMENT=BOTH see below (3001 S) Comments: ETC buffer time is 7249s. ------------------------------------------------------------------------------------------------------------------------------------ 5 SDSS1006+37 COS/FUV TIME-TA PSA G130M 1300 FP-POS=2, BUFFER-TIME=4833, 1 2900 S 05 G SEGMENT=BOTH see below (3001 S) Comments: ETC buffer time is 7249s. ------------------------------------------------------------------------------------------------------------------------------------ 6 SDSS1006+37 COS/FUV TIME-TA PSA G140L 1105 FP-POS=3, BUFFER-TIME=8677, 1 1450 S 05 G SEGMENT=A see below (1442 S) Comments: ETC buffer time is 13.0 ks. ------------------------------------------------------------------------------------------------------------------------------------ 7 SDSS1006+37 COS/FUV TIME-TA PSA G140L 1105 FP-POS=4, BUFFER-TIME=8677, 1 1450 S 05 G SEGMENT=A see below (1442 S) Comments: ETC buffer time is 13.0 ks. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 13415( 4) - 26-Mar-2014 15:45:21 - [ 5] 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSS1006+3705 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE SDSS1006+3705 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 2447.0 S G SDSS1006+3705 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 3001.0 S G SDSS1006+3705 4 COS/FUV TIME-TA PSA G130M 1300 none none none none 3 3001.0 S G SDSS1006+3705 5 COS/FUV TIME-TA PSA G130M 1300 none none none none 4 3001.0 S G SDSS1006+3705 6 COS/FUV TIME-TA PSA G140L 1105 none none none none 5 1442.0 S G SDSS1006+3705 7 COS/FUV TIME-TA PSA G140L 1105 none none none none 5 1442.0 S G 13415( 4) - 26-Mar-2014 15:45:21 - [ 6] Visit: 11 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSS1006+37 COS/NUV ACQ/IMA PSA MIRRORA 1 85 S (85 05 GE S) Comments: ACQ/IMAGE time estimated using the faintest NUV GALEX flux observed. ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSS1006+37 COS/FUV TIME-TA PSA G130M 1222 FP-POS=1, BUFFER-TIME=9957, 1 1450 S 05 G SEGMENT=BOTH see below (2447 S) Comments: ETC buffer time is 14.9 ks. ------------------------------------------------------------------------------------------------------------------------------------ 3 SDSS1006+37 COS/FUV TIME-TA PSA G130M 1222 FP-POS=2, BUFFER-TIME=9957, 1 1450 S 05 G SEGMENT=BOTH see below (3001 S) Comments: ETC buffer time is 14.9 ks. ------------------------------------------------------------------------------------------------------------------------------------ 4 SDSS1006+37 COS/FUV TIME-TA PSA G140L 1105 FP-POS=3, BUFFER-TIME=8677, 1 3000 S 05 G SEGMENT=A see below (2999 S) Comments: ETC buffer time is 13.0 ks. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSS1006+3705 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE SDSS1006+3705 2 COS/FUV TIME-TA PSA G130M 1222 none none none none 1 2447.0 S G SDSS1006+3705 3 COS/FUV TIME-TA PSA G130M 1222 none none none none 2 3001.0 S G SDSS1006+3705 4 COS/FUV TIME-TA PSA G140L 1105 none none none none 3 2999.0 S G 13415( 4) - 26-Mar-2014 15:45:21 - [ 7] Summary Form for Proposal 13415 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=4833, BUFFER-TIME=8677, BUFFER-TIME=9957, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4, SEGMENT=A, SEGMENT=BOTH ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M, G140L, MIRRORA ------------------------------------------------------------------------------------------------------------------------------------ Target Names SDSS1006+3705 ------------------------------------------------------------------------------------------------------------------------------------