11683( 3) - 11-Nov-2008 17:47:12 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11683 Version: 3 Check-in Time: 11-Nov-2008 17:47:12 STScI Edit Number: 1 Title Intracluster star formation and galaxy transformation: ESO 137-001 in A3627 ------------------------------------------------------------------------------------ Type Cycle GO 17 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Ming Sun Michigan State University CoI: Dr. Megan Donahue Michigan State University N CoI: Prof. Mark Voit Michigan State University N CoI: Dr. Christine Jones Smithsonian Institution Astrophysical N Observatory CoI: Dr. William R. Forman Smithsonian Institution Astrophysical N Observatory ------------------------------------------------------------------------------------ Abstract ESO137-001 is a small starburst galaxy in the nearby massive cluster A3627. A 70 kpc long X-ray tail behind ESO 137-001 has been revealed by both Chandra and XMM data, which makes it the only known late-type galaxy with an X-ray tail in a Coma-like cluster. Our SOAR observations also reveal a 40 kpc Halpha tail in the position of the X-ray tail, as well as ~ 30 intracluster HII regions in or around the tail. We propose HST observations of this unique galaxy to resolve the distorted galactic structures in transformation, and to search for yound star clusters in or around the tail, and to understand star formation in the galaxy and in the intracluster space. The results will be of general interest to galaxy transformation in clusters (e.g., ''Butcher-Oemler'' galaxies at z>0.3), starburst induced by ICM pressure, and intracluster star formation. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will use WFC3 and ACS to observe a nearby cluster galaxy and its gas tail region. We will observe with WFC3 in the F275W band in one orbit. We will also observe with ACS in the F475W and F814W bands in another orbit. If ACS is not available, we will use WFC3 to observe the target in the F438W and F814W bands. Real Time Justification ----------------------- Calibration Justification ------------------------- 11683( 3) - 11-Nov-2008 17:47:12 - [ 2] Additional Comments ------------------- ------------------------------------------------------------------------------------ 11683( 3) - 11-Nov-2008 17:47:12 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 ESO137-001-W CLUSTER OF GALAXIES, RA=16H13M23.3040S +/- 0.1", J2000 V = 14 +/- 0.5 FC3 RICH CLUSTER, STAR DEC=-60D45'20.44" +/- 0.1" FORMING REGION Reference Frame: ICRS Comments: measured from DSS2, offseted from the galaxy ESO137-001 to cover the gas tail range ------------------------------------------------------------------------------------------------------------------------------------ 11683( 3) - 11-Nov-2008 17:47:12 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 4 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 3.011 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.28 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 5 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-MOS-DITH-LINE Pattern_Purpose MOSAIC Number_Of_Points 3 Point_Spacing 2.4 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.754 Angle_Between_Sides Center_Pattern YES ------------------------------------------------------------------------------------------------------------------------------------ 11683( 3) - 11-Nov-2008 17:47:12 - [ 5] Visit: 01 Visit Requirements: ORIENT 240D TO 150 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 ESO137-001- ACS/WFC ACCUM WFC F814W 1 339 S PATTERN 4 1-2 WFC3 see below ------------------------------------------------------------------------------------------------------------------------------------ 2 ESO137-001- ACS/WFC ACCUM WFC F475W 1 871 S WFC3 see below ------------------------------------------------------------------------------------------------------------------------------------ 3 ESO137-001- WFC3/UVI ACCUM UVIS F275W CR-SPLIT=NO 1 978 S PATTERN 5 3 WFC3 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 | ------------------------------------------------------------------------------------------------------------------------------------ ESO137-001-WFC3 1 ACS/WFC ACCUM WFC F814W 1 none none none 1 339.0 S ESO137-001-WFC3 1 ACS/WFC ACCUM WFC F814W 2 none none none 1 339.0 S ESO137-001-WFC3 2 ACS/WFC ACCUM WFC F475W 1 none none none 1 871.0 S ESO137-001-WFC3 2 ACS/WFC ACCUM WFC F475W 2 none none none 1 871.0 S ESO137-001-WFC3 3 WFC3/UVI ACCUM UVIS F275W 1 none none none 2 N/A S ESO137-001-WFC3 3 WFC3/UVI ACCUM UVIS F275W 2 none none none 2 N/A S ESO137-001-WFC3 3 WFC3/UVI ACCUM UVIS F275W 3 none none none 2 N/A S 11683( 3) - 11-Nov-2008 17:47:12 - [ 6] Summary Form for Proposal 11683 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS, WFC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 240D TO 150 D, PATTERN 4 1-2, PATTERN 5 3 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F275W, F475W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names ESO137-001-WFC3 ------------------------------------------------------------------------------------------------------------------------------------