0 Assigned ID: 1304 ----- Attempting Submission 1 (Tue Nov 03 10:27:10 GMT 2020) ----- HST Phase I Proposal 1304 successfully submitted. Receipt: # 1304-1 Update the buffer time of G130M 1222A (Exp. #2) from 1400s to 700s. 1758392284 ----- Attempting Submission 1 (Wed Nov 18 22:06:52 GMT 2020) ----- HST Phase II Proposal 16465 successfully submitted. Receipt: # 16465-1 ----- Attempting Submission 2 (Thu Nov 19 13:46:04 GMT 2020) ----- HST Phase II Proposal 16465 successfully submitted. Receipt: # 16465-2 ----- Attempting Submission 3 (Fri Nov 20 22:52:51 GMT 2020) ----- 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. Use an imgaing target acq then exposures with G130M and G160M. Dr. Gerard Kriss is an expert in multi-wavelength observations of AGN, and an expert user of HST/COS. He analyzed the appearance of the UV absorption troughs associated with the X-ray obscuration of NGC 5548 in 2013-2014. Dr. Hermine Landt is an expert observer of AGN in the infra-red, and she discovered the He I metstable absorption lines in the obscured state of NGC 5548. Hermine got the IRTF and Keck observations of MR 2251-178 over engineering time. Prof. Jelle Kaastra is an expert in high-resolution X-ray spectroscopy of AGN using XMM-Newton and Chandra. He lead the discovery of the obscuring wind in NGC 5548 with a multi-wavelength campaign (including HST/COS, XMM-Newton, Chandra, and NuSTAR) in 2013-2014. Prof. Jon Miller is an expert in multi-wavelength observations of AGN. He is the PI of an awarded Gemini 2020B proposal targeting MR 2251-178. Dr. Junjie Mao is an expert in high-resolution X-ray spectroscopy of AGN using XMM-Newton and Chandra. He is the PI of an awarded Chandra Cycle 22 proposal targeting MR 2251-178. He has also obtained a Swift Target of Opportunity observation of MR 2251-178 on Aug. 19, 2020. Prof. Michael Brotherton is an expert on multi-wavelength observations of BAL quasars. Dr. Missagh Mehdipour is an expert in multi-wavelength observations of AGN. He is the PI of an awarded Swift Cycle 16 proposal targeting a sample of AGN including MR 2251-178. Supermassive Black Holes and Active Galaxies 0 true SUPPORTED GALAXY QSO NO This object was generated by the targetselector and retrieved from the NED database. J2000 F(1444)=2.6E-14 COS/FUV Spectroscopic No No G130M 1222 COS/FUV Spectroscopic No No G160M 1533 COS/FUV Spectroscopic No No G160M 1589 1605911126311 /private/var/folders/f7/mjmp3mkx72s0mkp6lwrp23q40000gn/T/OPVisit7081047762074039003.xml The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 16465 :visit-id "01" :proposal-version -1 :trans-version "20200619" :date "20-Nov-2020 22:25:26.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 122112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16465 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16465 :visit-id "01" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2536 :al-overhead-at-end 0 :internal-dur-at-end 331 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2929 :pcs-gap 0 ) true 1 0