15448( 3) - 22-Jan-2018 21:58:52 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15448 Version: 3 Check-in Time: 22-Jan-2018 21:58:52 STScI Edit Number: 1 Title Constraining the emergent EUV ionizing emission in the reawakening monster in Mrk 590 ------------------------------------------------------------------------------------ Type Cycle GO/DD 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Marianne Vestergaard University of Copenhagen, Niels Bohr Y Institute CoI: Dr. Sandra Raimundo University of Copenhagen, Niels Bohr N Institute CoI: Prof. Bradley M Peterson The Ohio State University N CoI: Dr. Gisella De Rosa Space Telescope Science Institute N CoI: Daniel P. Lawther University of Copenhagen, Niels Bohr N Institute CoI: Dr. Jun Yi (Kevin) Koay Academia Sinica, Institute of Astronomy N and Astrophysics ------------------------------------------------------------------------------------ Abstract After a 10-year hiatus, Mrk 590 is rekindling its nuclear activity! This offers a very rare opportunity to document the onset of AGN activity as it occurs that can lead to a better understanding of the long-standing issue of how AGNs are fuelled and how AGN work. We have monitored Mrk 590 ~bi-daily with Swift since late August 2017 in response to sudden and strong X-ray flares that continue. Early December we triggered our HST/COS ToO program of 2 single-orbit visits and additional ToO programs with VLT/Xshooter and Gemini that run for a month and spectroscopically cover from 3200A to 2.2micron. We now observe with Swift daily for at least another month. Our recent VLT/MUSE, X-shooter and HST/COS data show a strengthening of the UV-optical-IR broad lines. In particular, we see appearance of HeI IR lines that indicate a strengthening of the EUV continuum; the continuum is still low in the UV-optical and non-existing in the near-IR. We kindly ask for two additional single-orbit visits in order to follow the strengthening of the broad component of the UV Helium, Lyman-alpha and Carbon lines in order to better constrain the build-up of the ionizing EUV continuum source. The HST/COS data are pivotal, since we cannot obtain these constraints on the far-UV and EUV emission any other way. An extensive and ancillary database is being acquired on Mrk 590 from radio through X-ray wavelengths - also during this current brief monitoring campaign. These new and existing HST/COS data will contribute with unique information to the legacy database on this intriguing object, Mrk 590, that will undoubtedly spawn new insight on AGN and their fuelling. ------------------------------------------------------------------------------------ Observations Description ------------------------ This is an extension of proposal 15404. The source has already been successfully observed. Same observing startegy applies. =============================================================== 15448( 3) - 22-Jan-2018 21:58:52 - [ 2] We propose to obtain COS low resolution FUV observations of the Seyfert 1 galaxy Mrk 590 to determine if the AGN thermal emission and broad emission lines have re-appeared in response to the significant increase in X-ray and far-UV emission as detected by Swift when this program is triggered. Using the G140L grating @1105 Ang we will be able to cover the Lya1215, NV1240, Si IV + O IV1400, C IV1549, HeII1640 and CIII]1909 broad emission lines in a single exposure. The grating resolution is adequate to resolve the typical AGN narrow emission components; the width of the [O III]5007 narrow line is FWHM~400 km s-1. As explained in the Phase I, the target has been closely monitored with SWIFT, and in the past 80 days UVW2 fluxes (centroid wavelength 1928) have varied from a minimum of ~2.2e-15 erg s-1 cm-2 Ang-1 to a max of ~4.0 erg s-1 cm-2 Ang-1. Note: the target has already been successfully observed in the same configurations during faint state (PID 13518) ACQUISITION: The target has precise 2MASS coordinates (ICRS reproduced with an error < 0.1"). We plan to use ACQ/IMG NUV MIRRORB and an exp time of 140s. For our ETC calculations we assume a flat continuum in fl normalized to half of the min observed UVW2 flux f_l ~1.1e-15 erg s-1 cm-2 Ang-1 @1928 Ang (http://etc.stsci.edu/etc/results/COS.ta.1030198/). This will ensure acquisition in case of "faint" state. The source will not pose a threat to the detector even if it ends up being 5 times more luminous than the max detected in the past 80 days (http://etc.stsci.edu/etc/results/COS.ta.1030199/). SCIENCE: We use the G140L grating at 1105Ang with FP_POS=ALL. For ETC calculations we assume a flat continuum normalized to the mean observed UVW2 flux in the past 80 days (http://etc.stsci.edu/etc/results/COS.sp.1030204/). Buffer time is set to 2/3 of the ETC buffer time. The source will not pose a threat to the detector even if it ends up being 5 times more luminous than the past 80 days (http://etc.stsci.edu/etc/results/COS.sp.1030205/). ------------------------------------------------------------------------------------ 15448( 3) - 22-Jan-2018 21:58:52 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC-863 GALAXY, ACCRETION DISK, RA=02H14M33.5790S +/- 0.1", J2000 V = 13.81 BLR, SEYFERT DEC=-00D46'0.28" +/- 0.1" Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 15448( 3) - 22-Jan-2018 21:58:52 - [ 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC-863 COS/NUV ACQ/IMA PSA MIRRORB 1 140 S (140 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-863 COS/FUV TIME-TA PSA G140L 1105 FP-POS=ALL, BUFFER-TIME=5000 1 474 S G see below (1720 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-863 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE NGC-863 2 COS/FUV TIME-TA PSA G140L 1105 none none none 1 1 430.0 S G NGC-863 2 COS/FUV TIME-TA PSA G140L 1105 none none none 2 1 430.0 S G NGC-863 2 COS/FUV TIME-TA PSA G140L 1105 none none none 3 1 430.0 S G NGC-863 2 COS/FUV TIME-TA PSA G140L 1105 none none none 4 1 430.0 S G 15448( 3) - 22-Jan-2018 21:58:52 - [ 5] Visit: 02 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 NGC-863 COS/NUV ACQ/IMA PSA MIRRORB 1 140 S (140 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-863 COS/FUV TIME-TA PSA G140L 1105 FP-POS=ALL, BUFFER-TIME=5000 1 474 S G see below (1720 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-863 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE NGC-863 2 COS/FUV TIME-TA PSA G140L 1105 none none none 1 1 430.0 S G NGC-863 2 COS/FUV TIME-TA PSA G140L 1105 none none none 2 1 430.0 S G NGC-863 2 COS/FUV TIME-TA PSA G140L 1105 none none none 3 1 430.0 S G NGC-863 2 COS/FUV TIME-TA PSA G140L 1105 none none none 4 1 430.0 S G 15448( 3) - 22-Jan-2018 21:58:52 - [ 6] Visit: S3 (SafingAutoRepeat) 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 NGC-863 COS/NUV ACQ/IMA PSA MIRRORB 1 140 S (140 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-863 COS/FUV TIME-TA PSA G140L 1105 FP-POS=ALL, BUFFER-TIME=5000 1 474 S G see below (1720 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-863 1 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE NGC-863 2 COS/FUV TIME-TA PSA G140L 1105 none none none 1 1 430.0 S G NGC-863 2 COS/FUV TIME-TA PSA G140L 1105 none none none 2 1 430.0 S G NGC-863 2 COS/FUV TIME-TA PSA G140L 1105 none none none 3 1 430.0 S G NGC-863 2 COS/FUV TIME-TA PSA G140L 1105 none none none 4 1 430.0 S G 15448( 3) - 22-Jan-2018 21:58:52 - [ 7] Summary Form for Proposal 15448 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=5000, FP-POS=ALL ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G140L, MIRRORB ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC-863 ------------------------------------------------------------------------------------------------------------------------------------