13437( 4) - 30-Sep-2013 19:18:06 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13437 Version: 4 Check-in Time: 30-Sep-2013 19:18:06 STScI Edit Number: 0 Title The Morphology and Star Formation Distribution in a Big Cool Spiral LIRG ------------------------------------------------------------------------------------ Type Cycle GO 21 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Jane R. Rigby NASA Goddard Space Flight Center Y CoI: Dr. Keren Sharon University of Michigan Y CoI: Prof. Michael D. Gladders University of Chicago Y CoI: Dr. Eva Wuyts Max-Planck-Institut fur extraterrestrische N Physik CoI: Dr. Matthew Bayliss Harvard University N CoI: Dr. Haakon Dahle University of Oslo N ------------------------------------------------------------------------------------ Abstract Evidence from both the SEDs and morphologies of vigorous starbursts at z~1 compared to local templates shows that the mode of star formation in these galaxies is distinctly different in the past compared to the present day. Locally these objects (luminous infrared galaxies - LIRGs) show compact nuclear star forming regions with hot dusty SEDs; distant objects of similar luminosity appear much cooler and show signs of star formation over much larger regions. At z~1 these galaxies dominate the star formation rate density; they are where most stars are being formed, and so studying these sources is critical to understanding the overall picture of galaxy evolution. In a recent paper we detail the discovery of SGAS1438+1454, a lensed LIRG at z=0.816 that allows us to confirm this evolution of the mode of star formation in distant LIRGS in unprecedented detail. The lensed galaxy is a typical z~1 LIRG. With imaging data from g-band to 500 microns, and both optical and near-IR spectra in hand, we now seek to cap these extensive observations with a modest 3 orbit observation with HST. From the proposed data we will confirm the morphology and exent of the source with multi-band imaging, and directly measure the detailed distribution of star formation with an H-alpha grism observation. Extensive work shows that z~1 LIRGS are very different than today; with this lensed (but otherwise typical) LIRG and HST we will begin to illuminate how and why this difference exists. ------------------------------------------------------------------------------------ Observations Description ------------------------ ACS imaging in F606 a F814 in a single orbit. 3-point line dither using 1kx1k subraster to manage buffer dumps : total of 3 frames per filter. WFC3 grism observations at two roll angles, one orbit each angle. Two-point line dither for sub-pixel sampling; short F140W image taken at each position. ACS imaging packaged with the first of the WFC3-IR grism orbits to make total program consist of one two-orbit visit and one one-orbit visit. ACS imaging pqcked with the IR grism observation roll angle with greater visibility in an attempt to maximise schedulability. 13437( 4) - 30-Sep-2013 19:18:06 - [ 2] Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 13437( 4) - 30-Sep-2013 19:18:06 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SGAS143845.1 CLUSTER OF GALAXIES, RA=14H38M45.0300S, J2000 V = 21.0 +/- 0.3 +145407 GRAVITATIONAL LENS DEC=+14D54'12.50" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 13437( 4) - 30-Sep-2013 19:18:06 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.1633 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.28 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.636 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 41.788 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 13437( 4) - 30-Sep-2013 19:18:06 - [ 5] Visit: 01 Visit Requirements: ORIENT 144D TO 159 D 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 SGAS143845. ACS/WFC ACCUM WFC1-2K F606W 1 260 S (780 PATTERN 1 1-2 1+145407 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SGAS143845. ACS/WFC ACCUM WFC1-2K F814W 1 200 S (600 1+145407 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 SGAS143845. WFC3/IR MULTIAC GRISM1024 F140W NSAMP=15, SAMP-SEQ=SPARS10 1 DEF PATTERN 2 3-4 1+145407 CUM (285.892 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 SGAS143845. WFC3/IR MULTIAC GRISM1024 G141 NSAMP=13, SAMP-SEQ=SPARS100 1 DEF 1+145407 CUM (2405.872 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 | ------------------------------------------------------------------------------------------------------------------------------------ SGAS143845.1+145407 1 ACS/WFC ACCUM WFC1-2K F606W 1 none none none 1 N/A SGAS143845.1+145407 1 ACS/WFC ACCUM WFC1-2K F606W 2 none none none 1 N/A SGAS143845.1+145407 1 ACS/WFC ACCUM WFC1-2K F606W 3 none none none 1 N/A SGAS143845.1+145407 2 ACS/WFC ACCUM WFC1-2K F814W 1 none none none 1 N/A SGAS143845.1+145407 2 ACS/WFC ACCUM WFC1-2K F814W 2 none none none 1 N/A SGAS143845.1+145407 2 ACS/WFC ACCUM WFC1-2K F814W 3 none none none 1 N/A SGAS143845.1+145407 3 WFC3/IR MULTIAC GRISM102 F140W 1 none none none 2 N/A CUM 4 SGAS143845.1+145407 3 WFC3/IR MULTIAC GRISM102 F140W 2 none none none 2 N/A CUM 4 SGAS143845.1+145407 4 WFC3/IR MULTIAC GRISM102 G141 1 none none none 2 N/A CUM 4 SGAS143845.1+145407 4 WFC3/IR MULTIAC GRISM102 G141 2 none none none 2 N/A CUM 4 13437( 4) - 30-Sep-2013 19:18:06 - [ 6] Visit: 02 Visit Requirements: ORIENT 261D TO 271 D 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 SGAS143845. WFC3/IR MULTIAC GRISM1024 F140W NSAMP=15, SAMP-SEQ=SPARS10 1 DEF PATTERN 2 1-2 1+145407 CUM (285.892 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 SGAS143845. WFC3/IR MULTIAC GRISM1024 G141 NSAMP=13, SAMP-SEQ=SPARS100 1 DEF 1+145407 CUM (2405.872 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 | ------------------------------------------------------------------------------------------------------------------------------------ SGAS143845.1+145407 1 WFC3/IR MULTIAC GRISM102 F140W 1 none none none 1 N/A CUM 4 SGAS143845.1+145407 1 WFC3/IR MULTIAC GRISM102 F140W 2 none none none 1 N/A CUM 4 SGAS143845.1+145407 2 WFC3/IR MULTIAC GRISM102 G141 1 none none none 1 N/A CUM 4 SGAS143845.1+145407 2 WFC3/IR MULTIAC GRISM102 G141 2 none none none 1 N/A CUM 4 13437( 4) - 30-Sep-2013 19:18:06 - [ 7] Visit: A1 Visit Requirements: SEQ A1, A2, A3, A4 WITHIN 1 D On Hold Comments: Additional Comments: This orbit is charged to the Cycle 21 ACS Subarray Bias Calibration Program. 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 BIAS ACS/WFC ACCUM WFC1-2K DEF GAIN=2.0, COMPRESSION=NONE 6 0 S (0 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 | ------------------------------------------------------------------------------------------------------------------------------------ BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 1 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 2 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 3 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 4 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 5 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 6 none 1 N/A 13437( 4) - 30-Sep-2013 19:18:06 - [ 8] Visit: A2 Visit Requirements: On Hold Comments: Additional Comments: This orbit is charged to the Cycle 21 ACS Subarray Bias Calibration Program. 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 BIAS ACS/WFC ACCUM WFC1-2K DEF GAIN=2.0, COMPRESSION=NONE 6 0 S (0 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 | ------------------------------------------------------------------------------------------------------------------------------------ BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 1 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 2 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 3 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 4 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 5 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 6 none 1 N/A 13437( 4) - 30-Sep-2013 19:18:06 - [ 9] Visit: A3 Visit Requirements: On Hold Comments: Additional Comments: This orbit is charged to the Cycle 21 ACS Subarray Bias Calibration Program. 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 BIAS ACS/WFC ACCUM WFC1-2K DEF GAIN=2.0, COMPRESSION=NONE 6 0 S (0 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 | ------------------------------------------------------------------------------------------------------------------------------------ BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 1 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 2 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 3 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 4 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 5 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 6 none 1 N/A 13437( 4) - 30-Sep-2013 19:18:06 - [ 10] Visit: A4 Visit Requirements: GROUP A4, 01 WITHIN 14D On Hold Comments: Additional Comments: This orbit is charged to the Cycle 21 ACS Subarray Bias Calibration Program. 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 BIAS ACS/WFC ACCUM WFC1-2K DEF GAIN=2.0, COMPRESSION=NONE 6 0 S (0 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 | ------------------------------------------------------------------------------------------------------------------------------------ BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 1 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 2 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 3 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 4 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 5 none 1 N/A BIAS 1 ACS/WFC ACCUM WFC1-2K DEF none none 6 none 1 N/A 13437( 4) - 30-Sep-2013 19:18:06 - [ 11] Summary Form for Proposal 13437 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures GRISM1024, WFC1-2K ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters COMPRESSION=NONE, GAIN=2.0, NSAMP=13, NSAMP=15, SAMP-SEQ=SPARS10, SAMP-SEQ=SPARS100 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GROUP A4, 01 WITHIN 14D, ORIENT 144D TO 159 D, ORIENT 261D TO 271 D, PATTERN 1 1-2, PATTERN 2 1-2, PATTERN 2 3-4, SEQ A1, A2, A3, A4 WITHIN 1 D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements DEF, F140W, F606W, F814W, G141 ------------------------------------------------------------------------------------------------------------------------------------ Target Names BIAS, SGAS143845.1+145407 ------------------------------------------------------------------------------------------------------------------------------------