14853( 5) - 20-Jan-2017 18:03:57 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14853 Version: 5 Check-in Time: 20-Jan-2017 18:03:57 STScI Edit Number: 3 Title Catching a Changing Look Quasar as it undergoes significant changes in accretion rate ------------------------------------------------------------------------------------ Type Cycle GO 24 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Mirko Krumpe Leibniz-Institut fur Astrophysik Potsdam Y (AIP) CoI: Dr. Grant R. Tremblay Yale University N CoI: Dr. Bernd Husemann Max-Planck-Institut fur Astronomie, Y Heidelberg CoI: Dr. Tanya Urrutia Leibniz-Institut fur Astrophysik Potsdam N (AIP) CoI: Dr. Timothy Andrew Davis University of Wales, College of Cardiff N (UWCC) CoI: Prof. Scott Croom University of Sydney N CoI: Rebecca McElroy University of Sydney N ------------------------------------------------------------------------------------ Abstract We propose a joint TOO observation of Chandra (50 ks) and HST (2 orbits) of Mrk 1018. In February this year, we discovered the unambiguous case of a "changing look" quasar completing a full cycle: Mrk 1018 transformed from a Seyfert 1.9 to a Seyfert 1 in 1984, and it has just now transitioned back into a Seyfert 1.9. This state change is accompanied by extreme dimming in both X-ray and optical which might be still ongoing. Joint HST and Chandra observations are needed to constrain the current physical state of the accretion disk and embedded hot corona, respectively. This program will only be triggered if our optical monitoring programs detects a change of more than a factor of 5 in optical flux of Mrk 1018. Note that this proposal is accompanied by a GO proposal of the same object. ------------------------------------------------------------------------------------ Observations Description ------------------------ Standard two-orbit COS/FUV G140L observation of Markarian 1018, using the Primary Science Aperture. 40 sec ACQ/IMAGE observation to center on the UV photocentroid (the point source associated with the AGN). Four science exposures, spread over two orbits, are used to cycle through all four FP-POS positions. ------------------------------------------------------------------------------------ 14853( 5) - 20-Jan-2017 18:03:57 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 MRK-1018 GALAXY, BLR, QSO, RA=02H06M15.9888S +/- 0.25", J2000 Z = V = 15.0 +/- 0.5 7.5 counts/s in the SEYFERT DEC=-00D17'29.18" +/- 0.25" 0.043 250s long COS NUV (PSA and MIRRORB) acquisition images from Feb 2016 Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 14853( 5) - 20-Jan-2017 18:03:57 - [ 3] Visit: 01 (FUV-COS Mrk1018) Visit Requirements: PCS MODE FINE; BEFORE 28-FEB-2017:12:00:00 On Hold Comments: Additional Comments: UV spectroscopy of Lya and FUV continuum with COS of Mrk 1018 at the nucleus. 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 GS ACQ SCENARIO BASE1B3 GE S) Comments: The nucleus of Mrk 1018 has significantly dimmed compared to the GALEX observations. Observations with COS in Feb 2016 show a total contrate in the NUV acquisition images of 920 counts/s and the FUV QSO spectrum had a continuum flux of 1e-15 erg/s/cm2/A at 1310A. We currently perform u-band monitoring with ground-based telescope which confirm that the nucleus has further dimmed by 0.4mag. We therefore assume that it is safe to use the PSA/MIRRORA configuration and base the ETC computation a continuum flux of 0.5e-15 erg/s/cm2/A to be little more conservative. We may need to update this slightly if something dramatic happens when triggering these observations. ------------------------------------------------------------------------------------------------------------------------------------ 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) Comments: ETC run is attached to verify the maximum count/rates expected if the source would be as bright as in the HST-COS observation taken in Feb 2016. ------------------------------------------------------------------------------------------------------------------------------------ 3 MRK-1018 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=1080, FLASH=YES, 1 1186 S G FP-POS=2, SEGMENT=A (1186 S) Comments: ETC run is attached to verify the maximum count/rates expected if the source would be as bright as in the HST-COS observation taken in Feb 2016. ------------------------------------------------------------------------------------------------------------------------------------ 4 MRK-1018 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=1310, FLASH=YES, 1 1410 S G FP-POS=3, SEGMENT=A (1410 S) Comments: ETC run is attached to verify the maximum count/rates expected if the source would be as bright as in the HST-COS observation taken in Feb 2016. ------------------------------------------------------------------------------------------------------------------------------------ 14853( 5) - 20-Jan-2017 18:03:57 - [ 4] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 5 MRK-1018 COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=1300, FLASH=YES, 1 1409 S G FP-POS=4, SEGMENT=A (1409 S) Comments: ETC run is attached to verify the maximum count/rates expected if the source would be as bright as in the HST-COS observation taken in Feb 2016. ------------------------------------------------------------------------------------------------------------------------------------ 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 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 N/A G MRK-1018 5 COS/FUV TIME-TA PSA G140L 1105 none none none none 2 N/A G 14853( 5) - 20-Jan-2017 18:03:57 - [ 5] Summary Form for Proposal 14853 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=1080, BUFFER-TIME=1300, BUFFER-TIME=1310, FLASH=YES, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4, SEGMENT=A ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BEFORE 28-FEB-2017:12:00:00, GS ACQ SCENARIO BASE1B3, PCS MODE FINE ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G140L, MIRRORA ------------------------------------------------------------------------------------------------------------------------------------ Target Names MRK-1018 ------------------------------------------------------------------------------------------------------------------------------------