13940( 4) - 06-Jan-2015 17:35:26 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13940 Version: 4 Check-in Time: 06-Jan-2015 17:35:26 STScI Edit Number: 0 Title X-RAYS FROM GREEN PEA ANALOGS ------------------------------------------------------------------------------------ Type Cycle GO 22 ------------------------------------------------------------------------------------ Investigators Contact? PI: Mr. Matthew Brorby University of Iowa Y CoI: Dr. Philip Kaaret University of Iowa N ------------------------------------------------------------------------------------ Abstract X-rays may have contributed to the heating and reionization of the IGM in the early universe. High mass X-ray binaries (HMXB) within small, low-metallicity galaxies are expected to be the main source of X-rays at this time. Since studying these high-redshift galaxies is currently impossible, we turn to local analogs that have the same properties the galaxies in the early are expected to have. A number of recent studies have shown an enhanced number of HMXBs in nearby low metallicity galaxies. We propose to observe a sample of metal-deficient luminous compact galaxies (LCG) in order to determine if the X-ray luminosity is enhanced relative to SFR, thereby providing further evidence to the importance of X-rays in the early universe. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will obtain images in the F606W and F336W filters with the WFC3/UVIS. We will obtain three observations in each filter for cosmic ray and bad pixel rejection. We will obtain a total integration of 1080s in each filter. The F606W filter image will achieve a limiting V-magntiude of 25.9 at a signal to noise ratio of 5. At the distance to the galaxies of about 120 Mpc, this will permit detection of super star clusters with M_V < -9.5 (allowing for an extinction E(B-V) = 0.055 as measured for target #1, E(B-V) = 0.037 for target #2). The F336W filter image will enable us to construct a U-V color-magnitude diagram and constrain the ages of the star cluster via comparison with stellar synthesis models (e.g. Hunter et al.\ 2000, AJ, 120, 2383). We select F336W because of the young age expected for the stars in the clusters. The clusters detected in the F606W image with S/N = 5 will be detected in the F336W image at S/N = 3.7, allowing reasonable constraints on the U-band magnitudes of the dimmer clusters ($\Delta U = \pm 0.3$) and accurate measurements for the brightest clusters. ------------------------------------------------------------------------------------ 13940( 4) - 06-Jan-2015 17:35:26 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 6DFGS-GJ1448 GALAXY, DWARF COMPACT, RA=14H48M5.3780S, J2000 V = 16.5 05.3-011058 STAR FORMING REGION, DEC=-01D10'57.69" STARBURST Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSJ084220. GALAXY, DWARF COMPACT, RA=08H42M20.9000S, J2000 V = 16.5 94+115000.3 STAR FORMING REGION, DEC=+11D50'0.20" STARBURST Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 13940( 4) - 06-Jan-2015 17:35:26 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE-3PT Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.135 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 13940( 4) - 06-Jan-2015 17:35:26 - [ 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 6DFGS-GJ144 WFC3/UVI ACCUM UVIS2 F336W FLASH=12 1 360 S PATTERN 1 1 805.3-01105 S (1080 S) 8 ------------------------------------------------------------------------------------------------------------------------------------ 2 6DFGS-GJ144 WFC3/UVI ACCUM UVIS1 F606W 1 360 S PATTERN 1 2 805.3-01105 S (1080 S) 8 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 6DFGS-GJ144805.3-01 1 WFC3/UVI ACCUM UVIS2 F336W 1 none none none 1 N/A 1058 S 6DFGS-GJ144805.3-01 1 WFC3/UVI ACCUM UVIS2 F336W 2 none none none 1 N/A 1058 S 6DFGS-GJ144805.3-01 1 WFC3/UVI ACCUM UVIS2 F336W 3 none none none 1 N/A 1058 S 6DFGS-GJ144805.3-01 2 WFC3/UVI ACCUM UVIS1 F606W 1 none none none 1 N/A 1058 S 6DFGS-GJ144805.3-01 2 WFC3/UVI ACCUM UVIS1 F606W 2 none none none 1 N/A 1058 S 6DFGS-GJ144805.3-01 2 WFC3/UVI ACCUM UVIS1 F606W 3 none none none 1 N/A 1058 S 13940( 4) - 06-Jan-2015 17:35:26 - [ 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 SDSSJ084220 WFC3/UVI ACCUM UVIS2 F336W FLASH=12 1 360 S PATTERN 1 1 .94+115000. S (1080 S) 3 ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSJ084220 WFC3/UVI ACCUM UVIS1 F606W 1 360 S PATTERN 1 2 .94+115000. S (1080 S) 3 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSSJ084220.94+1150 1 WFC3/UVI ACCUM UVIS2 F336W 1 none none none 1 N/A 00.3 S SDSSJ084220.94+1150 1 WFC3/UVI ACCUM UVIS2 F336W 2 none none none 1 N/A 00.3 S SDSSJ084220.94+1150 1 WFC3/UVI ACCUM UVIS2 F336W 3 none none none 1 N/A 00.3 S SDSSJ084220.94+1150 2 WFC3/UVI ACCUM UVIS1 F606W 1 none none none 1 N/A 00.3 S SDSSJ084220.94+1150 2 WFC3/UVI ACCUM UVIS1 F606W 2 none none none 1 N/A 00.3 S SDSSJ084220.94+1150 2 WFC3/UVI ACCUM UVIS1 F606W 3 none none none 1 N/A 00.3 S 13940( 4) - 06-Jan-2015 17:35:26 - [ 6] Summary Form for Proposal 13940 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS1, UVIS2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=12 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F336W, F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names 6DFGS-GJ144805.3-011058, SDSSJ084220.94+115000.3 ------------------------------------------------------------------------------------------------------------------------------------