15319( 8) - 24-Jun-2019 16:08:39 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15319 Version: 8 Check-in Time: 24-Jun-2019 16:08:39 STScI Edit Number: 6 Title The HST View of Was 49b: An Overmassive AGN in a Merging Dwarf Galaxy? ------------------------------------------------------------------------------------ Type Cycle GO 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Nathan Secrest George Mason University Y CoI: Dr. Henrique R. Schmitt Naval Research Laboratory N CoI: Dr. Laura Blecha University of Florida N CoI: Dr. Barry Rothberg Large Binocular Telescope Observatory N CoI: Dr. Jacqueline Fischer George Mason University N CoI: Dr. Ingyin Zaw New York University N CoI: Dr. Mario Gliozzi George Mason University N CoI: Dr. Shobita Satyapal George Mason University N ------------------------------------------------------------------------------------ Abstract Galaxy interactions are ubiquitous and play a fundamental role in the evolution of galaxies and their supermassive black holes (SMBHs). While major galaxy mergers (M1/M2~1) often trigger accretion onto both SMBHs and enhance AGN activity, the influence of minor mergers (M1/M2<1/3) on AGN fueling is poorly understood, although there is evidence that minor mergers predominantly trigger AGN activity in the primary galaxy. The dual AGN system Was 49, by contrast, is a unique system composed of a dwarf galaxy in a minor (M1/M2~1/10) merger with a disk galaxy in which the dwarf galaxy hosts a heavily obscured AGN with a luminosity of over 10^45 erg/s, while the AGN in the primary galaxy is over one thousand times less luminous. Furthermore, the black hole powering the AGN in the dwarf galaxy is much larger than black hole/galaxy scaling relations predict, with a mass of over 2% that of the stellar mass of its host. While the stellar host of this powerful AGN has been identified, the low spatial resolution of ground-based observations has limited our ability to determine the nature of this strange object. High-resolution continuum and narrow-band imaging of Was 49 is critical to understanding how such a powerful AGN could exist in a such a low mass host galaxy, as well as how this AGN is affecting its environment. Only Hubble has the resolving power and the filtering capability to determine the structure of this dwarf galaxy and the effect that the powerful AGN it hosts is having on it. This study will yield key insights into how large black holes grow in low mass galaxies, the role of minor mergers on SMBH fueling, and the effect of AGN 'feedback' before merger coalescence. ------------------------------------------------------------------------------------ Observations Description ------------------------ The final TAC allocation was the same as our original proposal. Therefore, the observations will be split into three orbits. In one orbit, WFC3 will be used for observations with the F225W and F160W filters, 3 frames per filter, with a total of 30 minutes and 6 minutes, respectively. For another orbit, ACS will be used, with the FR551N filter x 3 frames, total = 25 minutes, and the FR647M filter x 3 frames, total = 6 minutes. For the third orbit, ACS will be used, with the FR716N filter x 3 frames, total = 25 minutes, and the FR914M filter x 15319( 8) - 24-Jun-2019 16:08:39 - [ 2] 3 frames, total = 6 minutes. The ACS ramp filters will be centered as follows. FR551N: 532.6 nm ([OIII]5007 at z = 0.06353) FR647M: 585.0 nm FR716N: 698.1 nm FR914M: 860.0 nm (H-alpha at z = 0.06353) ------------------------------------------------------------------------------------ 15319( 8) - 24-Jun-2019 16:08:39 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 WAS49B GALAXY, INTERACTING RA=12H14M17.8160S, J2000 V = 16.87 GALAXY, NLR, SEYFERT DEC=+29D31'43.17" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 15319( 8) - 24-Jun-2019 16:08:39 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.173 Line_Spacing 0.112 Coordinate_Frame POS-TARG Pattern_Orient 23.884 Angle_Between_Sides 81.785 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-BOX-MIN Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.572 Line_Spacing 0.365 Coordinate_Frame POS-TARG Pattern_Orient 18.528 Angle_Between_Sides 74.653 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.262 Line_Spacing 0.192 Coordinate_Frame POS-TARG Pattern_Orient 18.39 Angle_Between_Sides 68.14 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 15319( 8) - 24-Jun-2019 16:08:39 - [ 5] Visit: 01 (Visit) Visit Requirements: 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 WAS49B WFC3/UVI ACCUM UVIS2 F225W FLASH=11 1 421 S PATTERN 1 1 S (1684 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 WAS49B WFC3/IR MULTIAC IRSUB512 F160W NSAMP=9, SAMP-SEQ=STEP25 1 DEF PATTERN 2 2 CUM (422.074 S) Comments: AGN F160W magnitude = 17.9 (Vega; SED fit prediction) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ WAS49B 1 WFC3/UVI ACCUM UVIS2 F225W 1 none none none 1 N/A S WAS49B 1 WFC3/UVI ACCUM UVIS2 F225W 2 none none none 1 N/A S WAS49B 1 WFC3/UVI ACCUM UVIS2 F225W 3 none none none 1 N/A S WAS49B 1 WFC3/UVI ACCUM UVIS2 F225W 4 none none none 1 N/A S WAS49B 2 WFC3/IR MULTIAC IRSUB512 F160W 1 none none none 1 N/A CUM WAS49B 2 WFC3/IR MULTIAC IRSUB512 F160W 2 none none none 1 N/A CUM WAS49B 2 WFC3/IR MULTIAC IRSUB512 F160W 3 none none none 1 N/A CUM WAS49B 2 WFC3/IR MULTIAC IRSUB512 F160W 4 none none none 1 N/A CUM 15319( 8) - 24-Jun-2019 16:08:39 - [ 6] Visit: 02 Visit Requirements: 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 WAS49B ACS/WFC ACCUM WFC1-IRAM FR551N 5326 1 271 S PATTERN 3 1 PQ (1084 S) Comments: The dither pattern is the standard 4 point box dither to optimize PSF sampling. The dither should not be an issue for the limtied FOV of the ramp filters. ------------------------------------------------------------------------------------------------------------------------------------ 2 WAS49B ACS/WFC ACCUM WFC1-IRAM FR647M 5850 1 110 S (440 PATTERN 3 2 PQ S) Comments: The dither pattern is the standard 4 point box dither to optimize PSF sampling. The dither should not be an issue for the limtied FOV of the ramp filters. ------------------------------------------------------------------------------------------------------------------------------------ 3 WAS49B ACS/WFC ACCUM WFC1-IRAM FR716N 6981 1 293 S PATTERN 3 3 PQ (1172 S) Comments: The dither pattern is the standard 4 point box dither to optimize PSF sampling. The dither should not be an issue for the limtied FOV of the ramp filters. ------------------------------------------------------------------------------------------------------------------------------------ 4 WAS49B ACS/WFC ACCUM WFC1-MRAM FR914M 8600 1 110 S (440 PATTERN 3 4 PQ S) Comments: The dither pattern is the standard 4 point box dither to optimize PSF sampling. The dither should not be an issue for the limtied FOV of the ramp filters. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ WAS49B 1 ACS/WFC ACCUM WFC1-IRA FR551N 5326 1 none none none 1 N/A MPQ WAS49B 1 ACS/WFC ACCUM WFC1-IRA FR551N 5326 2 none none none 1 N/A MPQ WAS49B 1 ACS/WFC ACCUM WFC1-IRA FR551N 5326 3 none none none 1 N/A MPQ WAS49B 1 ACS/WFC ACCUM WFC1-IRA FR551N 5326 4 none none none 1 N/A MPQ 15319( 8) - 24-Jun-2019 16:08:39 - [ 7] 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 | ------------------------------------------------------------------------------------------------------------------------------------ WAS49B 2 ACS/WFC ACCUM WFC1-IRA FR647M 5850 1 none none none 1 N/A MPQ WAS49B 2 ACS/WFC ACCUM WFC1-IRA FR647M 5850 2 none none none 1 N/A MPQ WAS49B 2 ACS/WFC ACCUM WFC1-IRA FR647M 5850 3 none none none 1 N/A MPQ WAS49B 2 ACS/WFC ACCUM WFC1-IRA FR647M 5850 4 none none none 1 N/A MPQ WAS49B 3 ACS/WFC ACCUM WFC1-IRA FR716N 6981 1 none none none 2 N/A MPQ WAS49B 3 ACS/WFC ACCUM WFC1-IRA FR716N 6981 2 none none none 2 N/A MPQ WAS49B 3 ACS/WFC ACCUM WFC1-IRA FR716N 6981 3 none none none 2 N/A MPQ WAS49B 3 ACS/WFC ACCUM WFC1-IRA FR716N 6981 4 none none none 2 N/A MPQ WAS49B 4 ACS/WFC ACCUM WFC1-MRA FR914M 8600 1 none none none 2 N/A MPQ WAS49B 4 ACS/WFC ACCUM WFC1-MRA FR914M 8600 2 none none none 2 N/A MPQ WAS49B 4 ACS/WFC ACCUM WFC1-MRA FR914M 8600 3 none none none 2 N/A MPQ WAS49B 4 ACS/WFC ACCUM WFC1-MRA FR914M 8600 4 none none none 2 N/A MPQ 15319( 8) - 24-Jun-2019 16:08:39 - [ 8] Visit: 51 (Visit) Visit Requirements: On Hold Comments: Additional Comments: Repeat of failed visit 01. 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 WAS49B WFC3/UVI ACCUM UVIS2 F225W FLASH=11 1 421 S PATTERN 1 1 S (1684 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 WAS49B WFC3/IR MULTIAC IRSUB512 F160W NSAMP=9, SAMP-SEQ=STEP25 1 DEF PATTERN 2 2 CUM (422.074 S) Comments: AGN F160W magnitude = 17.9 (Vega; SED fit prediction) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ WAS49B 1 WFC3/UVI ACCUM UVIS2 F225W 1 none none none 1 N/A S WAS49B 1 WFC3/UVI ACCUM UVIS2 F225W 2 none none none 1 N/A S WAS49B 1 WFC3/UVI ACCUM UVIS2 F225W 3 none none none 1 N/A S WAS49B 1 WFC3/UVI ACCUM UVIS2 F225W 4 none none none 1 N/A S WAS49B 2 WFC3/IR MULTIAC IRSUB512 F160W 1 none none none 1 N/A CUM WAS49B 2 WFC3/IR MULTIAC IRSUB512 F160W 2 none none none 1 N/A CUM WAS49B 2 WFC3/IR MULTIAC IRSUB512 F160W 3 none none none 1 N/A CUM WAS49B 2 WFC3/IR MULTIAC IRSUB512 F160W 4 none none none 1 N/A CUM 15319( 8) - 24-Jun-2019 16:08:39 - [ 9] Summary Form for Proposal 15319 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IRSUB512, UVIS2, WFC1-IRAMPQ, WFC1-MRAMPQ ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=11, NSAMP=9, SAMP-SEQ=STEP25 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 2 2, PATTERN 3 1, PATTERN 3 2, PATTERN 3 3, PATTERN 3 4 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W, F225W, FR551N, FR647M, FR716N, FR914M ------------------------------------------------------------------------------------------------------------------------------------ Target Names WAS49B ------------------------------------------------------------------------------------------------------------------------------------