15411( 3) - 11-Dec-2017 21:41:09 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15411 Version: 3 Check-in Time: 11-Dec-2017 21:41:09 STScI Edit Number: 0 Title VLBA monitoring of the extraordinary changing-look quasar Mrk 1018 ------------------------------------------------------------------------------------ Type Cycle GO 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Miguel Perez-Torres Instituto de Astrofisica de Andalucia Y (IAA) CoI: Dr. Bernd Husemann Max-Planck-Institut fur Astronomie, N Heidelberg CoI: Dr. Grant R. Tremblay Smithsonian Institution Astrophysical N Observatory CoI: Dr. Tanya Urrutia Leibniz-Institut fur Astrophysik Potsdam N (AIP) CoI: Dr. Francoise Combes Observatoire de Paris N CoI: Dr. Timothy Andrew Davis University of Wales, College of Cardiff N (UWCC) CoI: Dr. Mirko Krumpe Leibniz-Institut fur Astrophysik Potsdam N (AIP) CoI: Prof. Andreas Eckart Universitat zu Koln N CoI: Jason Dexter Max Planck Institute for Extraterrestrial N Physics CoI: Prof. Scott Croom University of Sydney N CoI: Dr. Ruta Kale National Centre for Radio Astrophysics, N TIFR CoI: Dr. C. H Ishwara Chandra National Centre for Radio Astrophysics, N TIFR ------------------------------------------------------------------------------------ Abstract Last year, we discovered the first-ever unambiguous case of a changing look quasar completing a full cycle, Mrk1018, which first transitioned from a Sy 1.9 to a Sy 1 nucleus in 1984, remained broad-lined for about 30 years, and transitioned back to a Sy 1.9 sometime between 2013 and 2016. We were granted ToO VLBA observations during the second semester of 2016, which indicated flux density and spectral variability of the AGN core of Mrk1018 at GHz frequencies and, very remarkably, showed the emergence of a new compact component on December 2016). Additional VLBA DDT observations have shown the VLBA source disappear, while HST photometry is now dropping, while we expected it to be raising, Here, we request up to four multi-frequency VLBA observations to be done contemporaneously with requested HST COS observations and approved Chandra X-ray and optical monitoring to shed light on the nature of the puzzling behavior of Mrk 1018 and the (now disappeared) new source. The VLBA, with its unique multi-frequency capabilities and milliarcsecond angular resolution, may hold the key to understanding Mrk1018 and, by extension, the wider class of changing look AGN. ------------------------------------------------------------------------------------ Observations Description ------------------------ 15411( 3) - 11-Dec-2017 21:41:09 - [ 2] These COS-FUV observations are part of a coordinated multi-wavelength monitoring program combining radio (VLBA), X-rays (Chandra), and optical observations of the changing-look AGN Mrk1018. Each epoch we obtain a 2 orbit long FUV spectrum with the G140L grating to cover the FUV continuum at high S/N as well as the flux and shape of broad emission lines such as Lya and CIV. Although we have 4 epochs of VLBA and chandra observations granted, one will be in the extended sun block zone between end of February and beginning of June. Hence, we use two orbits to obtain a higher resolution spectrum with the G130M grating of the Lya line which is prone to various narrow absorption lines. This is necessary to calibrate the modelling of the broad Lya emission line in the low resolution spectra based on a single high-resolution spectrum. ------------------------------------------------------------------------------------ 15411( 3) - 11-Dec-2017 21:41:09 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 MRK-1018 GALAXY, ACCRETION DISK, RA=02H06M15.9888S +/- 0.25", J2000 V = 15.0 +/- 0.5 300 counts/s in the 4s JET, NUCLEUS, SEYFERT DEC=-00D17'29.18" +/- 0.25" long COS NUV (PSA and MIRRORA) acquisition images from Feb 2017 Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Coordinates were then slightly adjusted on subarcsec scale to match the coordinates of previous successfull observations ------------------------------------------------------------------------------------------------------------------------------------ 15411( 3) - 11-Dec-2017 21:41:09 - [ 4] Visit: 01 (FUV-COS Mrk1018) Visit Requirements: BETWEEN 18-JAN-2018:00:00:00 AND 14-FEB-2018:00:00:00 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 MRK-1018 COS/NUV ACQ/IMA PSA MIRRORA 1 40 S (40 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 MRK-1018 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=1080, FLASH=YES, 1 1180 S G FP-POS=1, SEGMENT=A (1180 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 MRK-1018 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=1080, FLASH=YES, 1 1180 S G FP-POS=2, SEGMENT=A (1180 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 MRK-1018 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=1305, FLASH=YES, 1 1350 S G FP-POS=3, SEGMENT=A see below (1405 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 MRK-1018 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=1305, FLASH=YES, 1 1350 S G FP-POS=4, SEGMENT=A see below (1405 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 MRK-1018 COS/FUV TIME-TA PSA G130M 1222 FP-POS=1, FLASH=YES, 1 1350 S G BUFFER-TIME=1299, SEGMENT=BOTH see below (1404 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 MRK-1018 COS/FUV TIME-TA PSA G130M 1222 FP-POS=2, FLASH=YES, 1 1350 S G BUFFER-TIME=1299, SEGMENT=BOTH see below (1404 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 MRK-1018 COS/FUV TIME-TA PSA G130M 1222 FP-POS=3, FLASH=YES, 1 1350 S G BUFFER-TIME=1300, SEGMENT=BOTH see below (1405 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 MRK-1018 COS/FUV TIME-TA PSA G130M 1222 FP-POS=4, FLASH=YES, 1 1350 S G BUFFER-TIME=1300, SEGMENT=BOTH see below (1405 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 | ------------------------------------------------------------------------------------------------------------------------------------ MRK-1018 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE 15411( 3) - 11-Dec-2017 21:41:09 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ MRK-1018 2 COS/FUV TIME-TA PSA G140L 1105 none none none none 1 N/A G MRK-1018 3 COS/FUV TIME-TA PSA G140L 1105 none none none none 1 N/A G MRK-1018 4 COS/FUV TIME-TA PSA G140L 1105 none none none none 2 1405.0 S G MRK-1018 5 COS/FUV TIME-TA PSA G140L 1105 none none none none 2 1405.0 S G MRK-1018 6 COS/FUV TIME-TA PSA G130M 1222 none none none none 3 1404.0 S G MRK-1018 7 COS/FUV TIME-TA PSA G130M 1222 none none none none 3 1404.0 S G MRK-1018 8 COS/FUV TIME-TA PSA G130M 1222 none none none none 4 1405.0 S G MRK-1018 9 COS/FUV TIME-TA PSA G130M 1222 none none none none 4 1405.0 S G 15411( 3) - 11-Dec-2017 21:41:09 - [ 6] Visit: 02 (FUV-COS Mrk1018) Visit Requirements: SCHED 50%; BETWEEN 11-JUN-2018:00:00:00 AND 11-JUL-2018:00:00:00 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 MRK-1018 COS/NUV ACQ/IMA PSA MIRRORA 1 40 S (40 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 MRK-1018 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=1070, FLASH=YES, 1 1180 S G FP-POS=1, SEGMENT=A see below (1105 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 MRK-1018 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=1070, FLASH=YES, 1 1180 S G FP-POS=2, SEGMENT=A see below (1105 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 MRK-1018 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=1300, FLASH=YES, 1 1350 S G FP-POS=3, SEGMENT=A see below (1330 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 MRK-1018 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=1300, FLASH=YES, 1 1350 S G FP-POS=4, SEGMENT=A see below (1330 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 | ------------------------------------------------------------------------------------------------------------------------------------ MRK-1018 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE MRK-1018 2 COS/FUV TIME-TA PSA G140L 1105 none none none none 1 1105.0 S G MRK-1018 3 COS/FUV TIME-TA PSA G140L 1105 none none none none 1 1105.0 S G MRK-1018 4 COS/FUV TIME-TA PSA G140L 1105 none none none none 2 1330.0 S G MRK-1018 5 COS/FUV TIME-TA PSA G140L 1105 none none none none 2 1330.0 S G 15411( 3) - 11-Dec-2017 21:41:09 - [ 7] Visit: 03 (FUV-COS Mrk1018) Visit Requirements: SCHED 50%; BETWEEN 17-AUG-2018:00:00:00 AND 14-SEP-2018:00:00:00 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 MRK-1018 COS/NUV ACQ/IMA PSA MIRRORA 1 40 S (40 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 2 MRK-1018 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=1070, FLASH=YES, 1 1180 S G FP-POS=1, SEGMENT=A see below (1105 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 MRK-1018 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=1070, FLASH=YES, 1 1180 S G FP-POS=2, SEGMENT=A see below (1105 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 MRK-1018 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=1300, FLASH=YES, 1 1350 S G FP-POS=3, SEGMENT=A see below (1330 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 MRK-1018 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=1300, FLASH=YES, 1 1350 S G FP-POS=4, SEGMENT=A see below (1330 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 | ------------------------------------------------------------------------------------------------------------------------------------ MRK-1018 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE MRK-1018 2 COS/FUV TIME-TA PSA G140L 1105 none none none none 1 1105.0 S G MRK-1018 3 COS/FUV TIME-TA PSA G140L 1105 none none none none 1 1105.0 S G MRK-1018 4 COS/FUV TIME-TA PSA G140L 1105 none none none none 2 1330.0 S G MRK-1018 5 COS/FUV TIME-TA PSA G140L 1105 none none none none 2 1330.0 S G 15411( 3) - 11-Dec-2017 21:41:09 - [ 8] Summary Form for Proposal 15411 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=1070, BUFFER-TIME=1080, BUFFER-TIME=1299, BUFFER-TIME=1300, BUFFER-TIME=1305, FLASH=YES, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4, SEGMENT=A, SEGMENT=BOTH ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 11-JUN-2018:00:00:00 AND 11-JUL-2018:00:00:00, BETWEEN 17-AUG-2018:00:00:00 AND 14-SEP-2018:00:00:00, BETWEEN 18-JAN-2018:00:00:00 AND 14-FEB-2018:00:00:00, SCHED 50% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M, G140L, MIRRORA ------------------------------------------------------------------------------------------------------------------------------------ Target Names MRK-1018 ------------------------------------------------------------------------------------------------------------------------------------