15617( 5) - 14-Dec-2018 15:47:16 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15617 Version: 5 Check-in Time: 14-Dec-2018 15:47:16 STScI Edit Number: 0 Title J1047+0739: X-ray weak/obscured AGN or extreme starburst? ------------------------------------------------------------------------------------ Type Cycle GO 26 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Franz Bauer Space Science Institute Y CoI: Prof. Trinh Xuan Thuan The University of Virginia N CoI: Dr. Yuri I. Izotov Ukrainian National Academy of Sciences, N BITP CoI: Ms. Charlotte Simmonds Pontificia Universidad Catolica de Chile N CoI: Dr. Daniel K Stern Jet Propulsion Laboratory N ------------------------------------------------------------------------------------ Abstract We propose a 50ks Chandra exposure of the enigmatic dwarf galaxy, SDSS J1047+0739, which has exceptionally luminous broad H-alpha, yet lies a factor of ~100 below the mean X-ray to H-alpha and [OIII] relations for AGN in a previous Chandra snapshot. The new data will characterize the X-ray spectral and temporal nature far better, addressing how such an extreme object might still be explained under the AGN paradigm. We additionally request HST ACS imaging to characterize the H-alpha morphology and distribution (point-like, clumpy, extended) on >0.1" scales. Coupled with the X-ray constraints, this will help to discern the production mechanism of the constant broad component in J1047+0739 and ultimately address how trustworthy optical broad lines are as tracers of AGN activity. ------------------------------------------------------------------------------------ Observations Description ------------------------ Observational aim is to constrain spatial extent of the broad H-alpha line through prudent placement of the variable central wavelength of the ACS/WFC FR782N ramp-filter. Relevant numbers for J1047+0739 are z=0.16828, i=18.4 ABmag, FWHM~0.5", full extent~2", F_Ha, narrow=2.0e14 (13Ang), F_Ha, broad=2.9e14 (42Ang), F_[NII], 6583=6.9e16 erg/s/cm2 (13Ang). We will obtain images sampling the full narrow+broad H-alpha line, the blue and red broad wings, and the continuum with the following: Setup (1): Lambda_center=7669Ang will image 100% of F_Ha, na and 91% of F_Ha, br in the H-alpha complex Setup (2): Lambda_center=7755Ang will image 17% of F_Ha, na and red 40% of F_Ha, br in the H-alpha complex Setup (3): Lambda_center=7583Ang will image 17% of F_Ha, na and blue 40% of F_Ha, br in the H-alpha complex 15617( 5) - 14-Dec-2018 15:47:16 - [ 2] Setup (4): Lambda_center=7474Ang will provide a continuum-only image to generate line-only images from the other setups. We expect only marginal contamination from [NII] and [SII]. Subtraction of the scaled continuum will give line only images. Subtraction of scaled line-only images will give reasonable red and blue broad-line and narrow-line images. We use a small 4-pt box dither to better sample the PSF for each setup. Using the ACS Imaging Exposure Time Calculator (ETC) with standard values, for setups 2 and 3 we aim to detect 25% of the total F_Ha, br, distributed evenly over ~2.0" diameter circular region (i.e., the whole extent), at S/N=20. We conservatively estimate we need ~5000 s split over 4 dithers plus ~350s (~2 orbits) for each setup. Unfortunately, the ETC was not operable presently to attach ETC run. ------------------------------------------------------------------------------------ 15617( 5) - 14-Dec-2018 15:47:16 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 J1047+0739 GALAXY, BLR, DWARF RA=10H47M55.9224S +/- 0.5", J2000 Z = V = 19.0 +/- 0.1 i=18.4 AB, F_Ha, COMPACT, EMISSION LINE DEC=+07D39'51.23" +/- 0.5" 0.16828 narrow=2.0e14 (13Ang), F_Ha, NEBULA, SEYFERT, broad=2.9e14 (42Ang), F_[NII], STARBURST 6583=6.9e16 erg/s/cm2 (13Ang). Reference Frame: ICRS Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 15617( 5) - 14-Dec-2018 15:47:16 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 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 ------------------------------------------------------------------------------------------------------------------------------------ 15617( 5) - 14-Dec-2018 15:47:16 - [ 5] Visit: 01 (Setups 1+2) 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 J1047+0739 ACS/WFC ACCUM WFC2-ORAM FR782N 7669.0 1 1216 S PATTERN 1 1 PQ (4977 S) Comments: ACS-WFC Ramp-filter ETC would not work ------------------------------------------------------------------------------------------------------------------------------------ 2 J1047+0739 ACS/WFC ACCUM WFC2-ORAM FR782N 7755.0 1 1266 S PATTERN 1 2 PQ (5064 S) Comments: ACS-WFC Ramp-filter ETC would not work ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1047+0739 1 ACS/WFC ACCUM WFC2-ORA FR782N 7669. 1 none none none 1 N/A MPQ 0 J1047+0739 1 ACS/WFC ACCUM WFC2-ORA FR782N 7669. 2 none none none 1 N/A MPQ 0 J1047+0739 1 ACS/WFC ACCUM WFC2-ORA FR782N 7669. 3 none none none 2 N/A MPQ 0 J1047+0739 1 ACS/WFC ACCUM WFC2-ORA FR782N 7669. 4 none none none 2 1329.0 S MPQ 0 J1047+0739 2 ACS/WFC ACCUM WFC2-ORA FR782N 7755. 1 none none none 3 N/A MPQ 0 J1047+0739 2 ACS/WFC ACCUM WFC2-ORA FR782N 7755. 2 none none none 3 N/A MPQ 0 J1047+0739 2 ACS/WFC ACCUM WFC2-ORA FR782N 7755. 3 none none none 4 N/A MPQ 0 J1047+0739 2 ACS/WFC ACCUM WFC2-ORA FR782N 7755. 4 none none none 4 N/A MPQ 0 15617( 5) - 14-Dec-2018 15:47:16 - [ 6] Visit: 02 (Setups 3+4) 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 J1047+0739 ACS/WFC ACCUM WFC2-ORAM FR782N 7474.0 1 1216 S PATTERN 1 1 PQ (4977 S) Comments: ACS-WFC Ramp-filter ETC would not work ------------------------------------------------------------------------------------------------------------------------------------ 2 J1047+0739 ACS/WFC ACCUM WFC2-ORAM FR782N 7583.0 1 1266 S PATTERN 1 2 PQ (5064 S) Comments: ACS-WFC Ramp-filter ETC would not work ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ J1047+0739 1 ACS/WFC ACCUM WFC2-ORA FR782N 7474. 1 none none none 1 N/A MPQ 0 J1047+0739 1 ACS/WFC ACCUM WFC2-ORA FR782N 7474. 2 none none none 1 N/A MPQ 0 J1047+0739 1 ACS/WFC ACCUM WFC2-ORA FR782N 7474. 3 none none none 2 N/A MPQ 0 J1047+0739 1 ACS/WFC ACCUM WFC2-ORA FR782N 7474. 4 none none none 2 1329.0 S MPQ 0 J1047+0739 2 ACS/WFC ACCUM WFC2-ORA FR782N 7583. 1 none none none 3 N/A MPQ 0 J1047+0739 2 ACS/WFC ACCUM WFC2-ORA FR782N 7583. 2 none none none 3 N/A MPQ 0 J1047+0739 2 ACS/WFC ACCUM WFC2-ORA FR782N 7583. 3 none none none 4 N/A MPQ 0 J1047+0739 2 ACS/WFC ACCUM WFC2-ORA FR782N 7583. 4 none none none 4 N/A MPQ 0 15617( 5) - 14-Dec-2018 15:47:16 - [ 7] Summary Form for Proposal 15617 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFC2-ORAMPQ ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements FR782N ------------------------------------------------------------------------------------------------------------------------------------ Target Names J1047+0739 ------------------------------------------------------------------------------------------------------------------------------------