16485( 2) - 02-Feb-2021 20:46:37 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 16485 Version: 2 Check-in Time: 02-Feb-2021 20:46:37 STScI Edit Number: 0 Title Hidden Binary Supermassive Black Holes Revealed by 'Radio-Near IR' Imaging ------------------------------------------------------------------------------------ Type Cycle GO 28 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Ilsang Yoon Associated Universities, Inc. Y CoI: Dr. Dong-Chan Kim Associated Universities, Inc. N CoI: Dr. Emmanuel Momjian Associated Universities, Inc. N CoI: Prof. Aaron S. Evans The University of Virginia N CoI: Dr. Ji Hoon Kim Metaspace N CoI: Dr. Minjin Kim Kyungpook National University N CoI: Dr. Mark D. Lacy Associated Universities, Inc. N CoI: Dr. Eilat Glikman Middlebury College N CoI: Bjorn Emonts Associated Universities, Inc. N CoI: Dr. Loreto Barcos-Munoz Associated Universities, Inc. N ------------------------------------------------------------------------------------ Abstract Nearly all galaxies harbor supermassive black holes and galaxy mergers are common in hierarchical galaxy formation. Therefore, the study of dual (~1kpc separation) or binary (~1pc separation) supermassive black hole (SMBH) is very important to understand the co-evolution of SMBH and its host galaxy. However, the number of confirmed dual or binary AGNs is small because most of the follow-up observations of the dual or binary SMBH candidates rely on a single observing band and therefore have a low success rate when one of the two (or both) AGNs is not visible in the chosen band. Based on the recent discovery of the radio-optical dual AGN demonstrating the importance of the multiband confirmation, we propose a pilot study of dual/binary AGN search using both highresolution radio and NIR images from VLBA and HST in order not to miss AGN that is visible only in either one of the observing bands. This program will provide high-resolution radio and NIR images to measure the separation of the two AGNs with the estimate of the galaxy stellar mass and black hole mass, and will demonstrate the power of using VLBA and HST(JWST in future) for a large scale systematic search for binary SMBHs. ------------------------------------------------------------------------------------ Observations Description ------------------------ We propose using HST/WFC3 F160W (H band). The 2MASS H band integrated magnitude for the targets are 14.49 and 14.14 mag. We find the optimal exposure sequence that has a mixture of short and long exposure to avoid a saturation at the center of galaxies and obtain a reliable nuclear morphology, while we sample the host galaxy morphology beyond half-light radius with surface brightness of 21.5 mag/arcsec^2 in F160W, using exposure time calculator. We will use the standard 4-point dithering for each visit and find that 1 orbit for each target will be sufficient for on source exposure with 2 repeats of the dither pattern. ------------------------------------------------------------------------------------ 16485( 2) - 02-Feb-2021 20:46:37 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 J094822.45+6 GALAXY, MULTIPLE NUCLEI RA=09H48M22.4592S, J2000 Z = V = 18.82 84835.2 DEC=+68D48'35.23" 0.201 Reference Frame: ICRS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0 0.0 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 2 J122313.21+5 GALAXY, MULTIPLE NUCLEI RA=12H23M13.2147S, J2000 Z = V = 17.35 40906.5 DEC=+54D09'6.46" 0.155 Reference Frame: ICRS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0 0.0 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 16485( 2) - 02-Feb-2021 20:46:37 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 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 ------------------------------------------------------------------------------------------------------------------------------------ 16485( 2) - 02-Feb-2021 20:46:37 - [ 4] Visit: 01 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 J094822.45+ WFC3/IR MULTIAC IR F160W NSAMP=14, SAMP-SEQ=SPARS25 2 DEF PATTERN 1 1 684835.2 CUM (2623.512 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 | ------------------------------------------------------------------------------------------------------------------------------------ J094822.45+684835.2 1 WFC3/IR MULTIAC IR F160W 1 none 1 none 1 N/A CUM J094822.45+684835.2 1 WFC3/IR MULTIAC IR F160W 1 none 2 none 1 N/A CUM J094822.45+684835.2 1 WFC3/IR MULTIAC IR F160W 2 none 1 none 1 N/A CUM J094822.45+684835.2 1 WFC3/IR MULTIAC IR F160W 2 none 2 none 1 N/A CUM J094822.45+684835.2 1 WFC3/IR MULTIAC IR F160W 3 none 1 none 1 N/A CUM J094822.45+684835.2 1 WFC3/IR MULTIAC IR F160W 3 none 2 none 1 N/A CUM J094822.45+684835.2 1 WFC3/IR MULTIAC IR F160W 4 none 1 none 1 N/A CUM J094822.45+684835.2 1 WFC3/IR MULTIAC IR F160W 4 none 2 none 1 N/A CUM 16485( 2) - 02-Feb-2021 20:46:37 - [ 5] 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 J122313.21+ WFC3/IR MULTIAC IR F160W NSAMP=14, SAMP-SEQ=SPARS25 2 DEF PATTERN 1 1 540906.5 CUM (2623.512 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 | ------------------------------------------------------------------------------------------------------------------------------------ J122313.21+540906.5 1 WFC3/IR MULTIAC IR F160W 1 none 1 none 1 N/A CUM J122313.21+540906.5 1 WFC3/IR MULTIAC IR F160W 1 none 2 none 1 N/A CUM J122313.21+540906.5 1 WFC3/IR MULTIAC IR F160W 2 none 1 none 1 N/A CUM J122313.21+540906.5 1 WFC3/IR MULTIAC IR F160W 2 none 2 none 1 N/A CUM J122313.21+540906.5 1 WFC3/IR MULTIAC IR F160W 3 none 1 none 1 N/A CUM J122313.21+540906.5 1 WFC3/IR MULTIAC IR F160W 3 none 2 none 1 N/A CUM J122313.21+540906.5 1 WFC3/IR MULTIAC IR F160W 4 none 1 none 1 N/A CUM J122313.21+540906.5 1 WFC3/IR MULTIAC IR F160W 4 none 2 none 1 N/A CUM 16485( 2) - 02-Feb-2021 20:46:37 - [ 6] Summary Form for Proposal 16485 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=14, SAMP-SEQ=SPARS25 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W ------------------------------------------------------------------------------------------------------------------------------------ Target Names J094822.45+684835.2, J122313.21+540906.5 ------------------------------------------------------------------------------------------------------------------------------------