16465( 4) - 23-Nov-2020 14:32:41 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16465 Version: 4 Check-in Time: 23-Nov-2020 14:32:41 STScI Edit Number: 0 Title Chasing obscuring wind in the quasar MR 2251-178 ------------------------------------------------------------------------------------ Type Cycle GO/DD 28 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Junjie Mao University of Strathclyde Y CoI: Dr. Gerard A. Kriss Space Telescope Science Institute Y CoI: Dr. Hermine Landt Durham Univ. N CoI: Dr. Jelle Kaastra Space Research Organization Netherlands N CoI: Dr. Jon Matthew Miller University of Michigan N CoI: Dr. Michael S. Brotherton University of Wyoming N CoI: Dr. Missagh Mehdipour Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract Active Galactic Nuclei (AGN) are the observed manifestation of the inflow of matter onto supermassive black holes. Winds driven away from black holes have also been observed, which might play an important role in the evolution of black holes and their host galaxies. The obscuring wind is a rare breed of AGN winds, which has been observed in only a few Seyfert 1 galaxies so far. This putative disk wind absorbs a large fraction of the soft X-ray photons. Contemporaneous blueshifted broad absorption troughs associated with UV and NIR resonance lines appear in association with the emergence of the soft X-ray obscuration. Obscuring winds are expected to be present in quasars (more massive and luminous AGN) with broad absorption lines. The accelerated UV-absorbing gas needs to be shielded from much of the UV/X-ray ionizing radiation. Aside from the well-known properties of broad absorption line (BAL) QSOs, the transient appearance of obscuring winds in quasars with typically clear lines of sight has not been observed so far. Recent Swift X-ray data of the radio-quiet quasar MR 2251-178 suggest that the soft X-ray spectrum is significantly absorbed. Simultaneously, a blueshifted broad absorption trough of He I 1.08 micron is developing in recent high-resolution NIR spectra observed with IRTF and Gemini. We propose to observe MR 2251-178 with HST/COS (1 orbit) to constrain the physical properties of the putative obscuring wind and to explore similarities and differences with Seyfert galaxies like NGC 5548 and NGC 3783. ------------------------------------------------------------------------------------ Observations Description ------------------------ Use an imgaing target acq then exposures with G130M and G160M. ------------------------------------------------------------------------------------ 16465( 4) - 23-Nov-2020 14:32:41 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 MR-2251-178 GALAXY, QSO RA=22H54M5.8008S +/- 0.1", J2000 V = 14.4 +/- 0.5 F(1444)=2.6E-14 DEC=-17D34'54.98" +/- 0.1" Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the NED database. ------------------------------------------------------------------------------------------------------------------------------------ 16465( 4) - 23-Nov-2020 14:32:41 - [ 3] 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 MR-2251-178 COS/NUV ACQ/IMA PSA MIRRORB 1 10. S (10 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 MR-2251-178 COS/FUV TIME-TA PSA G130M 1222 FP-POS=ALL, BUFFER-TIME=700 1 140. S G see below (544 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 MR-2251-178 COS/FUV TIME-TA PSA G160M 1533 FP-POS=3, BUFFER-TIME=2000 1 170. S G see below (166 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 MR-2251-178 COS/FUV TIME-TA PSA G160M 1533 FP-POS=4, BUFFER-TIME=2000 1 170. S G see below (166 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 MR-2251-178 COS/FUV TIME-TA PSA G160M 1589 FP-POS=1, BUFFER-TIME=2000 1 175. S G see below (171 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 MR-2251-178 COS/FUV TIME-TA PSA G160M 1589 FP-POS=2, BUFFER-TIME=2000 1 175. S G see below (171 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ MR-2251-178 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE MR-2251-178 2 COS/FUV TIME-TA PSA G130M 1222 none none none 1 1 136.0 S G MR-2251-178 2 COS/FUV TIME-TA PSA G130M 1222 none none none 2 1 136.0 S G MR-2251-178 2 COS/FUV TIME-TA PSA G130M 1222 none none none 3 1 136.0 S G MR-2251-178 2 COS/FUV TIME-TA PSA G130M 1222 none none none 4 1 136.0 S G MR-2251-178 3 COS/FUV TIME-TA PSA G160M 1533 none none none none 1 166.0 S G 16465( 4) - 23-Nov-2020 14:32:41 - [ 4] 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 | ------------------------------------------------------------------------------------------------------------------------------------ MR-2251-178 4 COS/FUV TIME-TA PSA G160M 1533 none none none none 1 166.0 S G MR-2251-178 5 COS/FUV TIME-TA PSA G160M 1589 none none none none 1 171.0 S G MR-2251-178 6 COS/FUV TIME-TA PSA G160M 1589 none none none none 1 171.0 S G 16465( 4) - 23-Nov-2020 14:32:41 - [ 5] Summary Form for Proposal 16465 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=2000, BUFFER-TIME=700, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4, FP-POS=ALL ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M, G160M, MIRRORB ------------------------------------------------------------------------------------------------------------------------------------ Target Names MR-2251-178 ------------------------------------------------------------------------------------------------------------------------------------