13115( 4) - 25-Sep-2012 16:40:24 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13115 Version: 4 Check-in Time: 25-Sep-2012 16:40:24 STScI Edit Number: 0 Title A High-Resolution Study of Long-Term Absorption Variation and the X-ray/UV Connection in NGC 3783 ------------------------------------------------------------------------------------ Type Cycle GO 20 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. W. Nielsen Brandt The Pennsylvania State University Y CoI: Dr. Robert R. Gibson University of Washington N CoI: Dr. Ehud Behar Technion-Israel Institute of Technology N CoI: Dr. D. Michael Crenshaw Georgia State University Research N Foundation CoI: Dr. Jack Gabel Creighton University N CoI: Dr. Shai Kaspi Tel Aviv University - Wise Observatory N CoI: Prof. Steven Kraemer Catholic University of America N CoI: Dr. T. Jane Turner University of Maryland Baltimore County N ------------------------------------------------------------------------------------ Abstract We propose a 170 ks HETGS observation of the bright Seyfert 1 galaxy NGC 3783 to explore the new parameter space of high-resolution warm absorber (WA) variation in ionization, structure, and kinematics over 11 yr. NGC 3783 is the ideal candidate for such a long-term variation study, due to its extraordinary baseline of HETGS (from 2000-2001) and UV spectroscopy, its extremely rich absorption spectrum, and its X-ray/UV brightness. In addition to mapping long-term WA evolution in unprecedented detail, we will assess joint X-ray/UV absorption variations over long time scales with a supporting HST COS spectrum; substantial UV variations over the past 11 yr indicate that corresponding X-ray variations should be detected and be physically informative. Note this is an accepted joint proposal between HST COS and Chandra HETGS. As per our original Chandra proposal, we prefer that the HST and Chandra observations be conducted reasonably close together in time (within about 10 days), although we do not have a formal time constraint. ------------------------------------------------------------------------------------ Observations Description ------------------------ Here we are essentially repeating the HST COS observations of NGC 3783 done as part of program 12212 in order to investigate variation of its intrinsic multi-component UV absorption-line system. Our new observations will complement about 30 yr of existing low-resolution and high-resolution UV spectroscopy. One orbit with each of the medium-resolution (G160M and G130M) FUV gratings should provide a S/N of about 30 in 3 ks (based on the HST exposure-time calculator) at excellent resolution (about 16 km/s). The continuum of NGC 3783 has been consistently bright, with F_lambda of about 4e-14 erg/s/cm^2/A at 1470 A (e.g., see Figure 1a of Gabel et al. 2003a), so we do not expect a low S/N for our observations. The advantages of high S/N for this observation justify the use of a second HST orbit. 13115( 4) - 25-Sep-2012 16:40:24 - [ 2] Note this is an accepted joint proposal between HST COS and Chandra HETGS. As per our original Chandra proposal, we prefer that the HST and Chandra observations be conducted reasonably close together in time (within about 10 days), although we do not have a formal time constraint. I would be happy to provide a copy of the original Chandra + HST proposal if desired. Also, Steven Penton there at STScI has a copy already, I believe. Real Time Justification ----------------------- Note this is an accepted joint proposal between HST COS and Chandra HETGS. As per our original Chandra proposal, we prefer that the HST and Chandra observations be conducted reasonably close together in time (within about 10 days), although we do not have a formal time constraint. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 13115( 4) - 25-Sep-2012 16:40:24 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC-3783 GALAXY, ACCRETION DISK, RA=11H39M1.7208S +/- 0.1", J2000 V = 12.6 SEYFERT, WIND DEC=-37D44'18.89" +/- 0.1" Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the NED database. ------------------------------------------------------------------------------------------------------------------------------------ 13115( 4) - 25-Sep-2012 16:40:24 - [ 4] Visit: 01 Visit Requirements: SCHED 100% 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 NGC-3783 COS/FUV ACQ/PEA PSA G130M 1291 1 10 S KXD Comments: Here we are essentially repeating the HST COS observations of NGC 3783 done as part of program 12212 in order to investigate variation of its intrinsic multi-component UV absorption-line system. Previous COS observations place the target flux at F(1280)=4.5E-14; we used this flux to simulate the target with a composite QSO spectrum redshifted to z=0.00973. Total count rate on Segment A is 745 counts/s. To get S/N=40 on Seg A would take about 3.4s, we use 10s to ensure a good centering and allow for target variability. ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-3783 COS/FUV ACQ/PEA PSA G130M 1291 NUM-POS=5, CENTER=DEF, 1 10 S KD STEP-SIZE=0.9, SEGMENT=BOTH Comments: Here we are essentially repeating the HST COS observations of NGC 3783 done as part of program 12212 in order to investigate variation of its intrinsic multi-component UV absorption-line system. Previous COS observations place the target flux at F(1280)=4.5E-14; we used this flux to simulate the target with a composite QSO spectrum redshifted to z=0.00973. Total count rate on Segment A is 745 counts/s. To get S/N=40 on Seg A would take about 3.4s, we use 10s to ensure a good centering and allow for target variability. ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-3783 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=360, FP-POS=3 1 460 S G Comments: Here we are essentially repeating the HST COS observations of NGC 3783 done as part of program 12212 in order to investigate variation of its intrinsic multi-component UV absorption-line system. ------------------------------------------------------------------------------------------------------------------------------------ 13115( 4) - 25-Sep-2012 16:40:24 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC-3783 COS/FUV TIME-TA PSA G130M 1300 BUFFER-TIME=360, FP-POS=3 1 460 S G Comments: Here we are essentially repeating the HST COS observations of NGC 3783 done as part of program 12212 in order to investigate variation of its intrinsic multi-component UV absorption-line system. ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC-3783 COS/FUV TIME-TA PSA G130M 1309 BUFFER-TIME=360, FP-POS=3 1 460 S G Comments: Here we are essentially repeating the HST COS observations of NGC 3783 done as part of program 12212 in order to investigate variation of its intrinsic multi-component UV absorption-line system. ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC-3783 COS/FUV TIME-TA PSA G130M 1318 BUFFER-TIME=230, FP-POS=3 1 340 S G Comments: Here we are essentially repeating the HST COS observations of NGC 3783 done as part of program 12212 in order to investigate variation of its intrinsic multi-component UV absorption-line system. ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC-3783 COS/FUV TIME-TA PSA G160M 1589 BUFFER-TIME=480, FP-POS=3 1 580 S G Comments: Here we are essentially repeating the HST COS observations of NGC 3783 done as part of program 12212 in order to investigate variation of its intrinsic multi-component UV absorption-line system. ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC-3783 COS/FUV TIME-TA PSA G160M 1600 BUFFER-TIME=480, FP-POS=3 1 580 S G Comments: Here we are essentially repeating the HST COS observations of NGC 3783 done as part of program 12212 in order to investigate variation of its intrinsic multi-component UV absorption-line system. ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC-3783 COS/FUV TIME-TA PSA G160M 1611 BUFFER-TIME=480, FP-POS=3 1 580 S G Comments: Here we are essentially repeating the HST COS observations of NGC 3783 done as part of program 12212 in order to investigate variation of its intrinsic multi-component UV absorption-line system. 13115( 4) - 25-Sep-2012 16:40:24 - [ 6] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC-3783 COS/FUV TIME-TA PSA G160M 1623 BUFFER-TIME=314, FP-POS=3 1 424 S G Comments: Here we are essentially repeating the HST COS observations of NGC 3783 done as part of program 12212 in order to investigate variation of its intrinsic multi-component UV absorption-line system. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-3783 1 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A KXD NGC-3783 2 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A KD NGC-3783 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G NGC-3783 4 COS/FUV TIME-TA PSA G130M 1300 none none none none 1 N/A G NGC-3783 5 COS/FUV TIME-TA PSA G130M 1309 none none none none 1 N/A G NGC-3783 6 COS/FUV TIME-TA PSA G130M 1318 none none none none 1 N/A G NGC-3783 7 COS/FUV TIME-TA PSA G160M 1589 none none none none 2 N/A G NGC-3783 8 COS/FUV TIME-TA PSA G160M 1600 none none none none 2 N/A G NGC-3783 9 COS/FUV TIME-TA PSA G160M 1611 none none none none 2 N/A G NGC-3783 10 COS/FUV TIME-TA PSA G160M 1623 none none none none 2 N/A G 13115( 4) - 25-Sep-2012 16:40:24 - [ 7] Summary Form for Proposal 13115 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/PEAKD, ACQ/PEAKXD, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=230, BUFFER-TIME=314, BUFFER-TIME=360, BUFFER-TIME=480, CENTER=DEF, FP-POS=3, NUM-POS=5, SEGMENT=BOTH, STEP-SIZE=0.9 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M, G160M ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC-3783 ------------------------------------------------------------------------------------------------------------------------------------