11339( 6) - 22-Feb-2008 15:28:46 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11339 Version: 6 Check-in Time: 22-Feb-2008 15:28:46 STScI Edit Number: 3 Title A deep observation of NGC4261: understanding its unique X-ray source population, gas morphology, and jet properties ------------------------------------------------------------------------------------ Type Cycle Parallel Pointing Tolerance GO 16 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Andreas Zezas Smithsonian Institution Astrophysical Observatory CoI: Dr. Ginevra Trinchieri Osservatorio Astronomico di Brera, Milano N CoI: Dr. Mark Birkinshaw University of Bristol N CoI: Dr. Diana M. Worrall University of Bristol N CoI: Dr. Ewan O'Sullivan Smithsonian Institution Astrophysical N Observatory CoI: Dr. Anna Wolter Osservatorio Astronomico di Brera, Milano N CoI: Dr. Giuseppina Fabbiano Smithsonian Institution Astrophysical N Observatory CoI: Ms. Lea Giordano Universita di Milano N ------------------------------------------------------------------------------------ Abstract The nearby early-type galaxy NGC4261 reveals strikingly asymmetric distributions of X-ray sources as seen with Chandra, and globular clusters (GC) as seen in the optical band. To address the link between these populations based on their spatial correlation, luminosity function and spectral properties, and to inve- stigate the possibility that this effect is due to the galaxy's merger history, we propose a 100ksec Chandra ACIS-S3 exposure, which will detect X-ray sources down to typical LMXB luminosities (Lx~5E37 erg/s), and HST-WFPC2 observations to obtain a deep census of the GC population over the whole galaxy. These data will also allow a detailed study of its complex gaseous component, and provide information on the unique two-sided X-ray jet. ------------------------------------------------------------------------------------ Observations Description ------------------------ The goal of this program is the study of the globular cluster population in the nearby elliptical galaxy NGC4261. In order to cover the D25 area of the galaxy we observe 6 fields with a 2-point dither pattern. In order to ensure uniform coverage we request for the observations to be performed with the same orientation (as was specified in the proposal). The selected orientation gives the maximum visibility during the observing period. Instead of definining new targets we apply POS-TARG offsets with respect to the nucleus of the galaxy. The exposure in each position is 800sec for each of the F450W, F606W and F814W filters. Real Time Justification ----------------------- 11339( 6) - 22-Feb-2008 15:28:46 - [ 2] Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 11339( 6) - 22-Feb-2008 15:28:46 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC-4261-WFP GALAXY, ELLIPTICAL RA=12H19M23.2000S +/- 0.1", J2000 V = 11.41 C2-MOSAIC-CE DEC=+05D49'31.00" +/- 0.1" NTER Reference Frame: Other: NED Comments: This object was generated by the targetselector and retrieved from the NED database. ------------------------------------------------------------------------------------------------------------------------------------ 11339( 6) - 22-Feb-2008 15:28:46 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type LINE WFPC2-LINE Pattern_Purpose MOSAIC DITHER Number_Of_Points 2 2 Point_Spacing 95.0 0.3535 Line_Spacing Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 0.0 45.0 Angle_Between_Sides Center_Pattern NO NO ------------------------------------------------------------------------------------------------------------------------------------ 11339( 6) - 22-Feb-2008 15:28:46 - [ 5] Visit: 01 Visit Priority: Visit Requirements: ORIENT 280.0D TO 295.0 D; ORIENT 0.0D TO 0.0 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 NGC-4261-WF WFPC2 IMAGE WF3-FIX F606W CR-SPLIT=NO, ATD-GAIN=7 1 400.0 S POS TARG 25.0, -105.0; PC2-MOSAIC- PATTERN 2 1 CENTER ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-4261-WF WFPC2 IMAGE WF3-FIX F606W CR-SPLIT=NO, ATD-GAIN=7 1 400.0 S GS ACQ SCENARIO SINGLE; PC2-MOSAIC- PATTERN 2 2 CENTER ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-4261-WF WFPC2 IMAGE WF3-FIX F606W CR-SPLIT=NO, ATD-GAIN=7 1 400.0 S POS TARG -30.0, 105.0; PC2-MOSAIC- GS ACQ SCENARIO SINGLE; CENTER PATTERN 2 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F606W 1 1 none none 1 N/A IC-CENTER NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F606W 1 2 none none 1 N/A IC-CENTER NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F606W 2 1 none none 1 N/A IC-CENTER NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F606W 2 2 none none 1 N/A IC-CENTER NGC-4261-WFPC2-MOSA 2 WFPC2 IMAGE WF3-FIX F606W 1 1 none none 2 N/A IC-CENTER NGC-4261-WFPC2-MOSA 2 WFPC2 IMAGE WF3-FIX F606W 1 2 none none 2 N/A IC-CENTER NGC-4261-WFPC2-MOSA 2 WFPC2 IMAGE WF3-FIX F606W 2 1 none none 2 N/A IC-CENTER NGC-4261-WFPC2-MOSA 2 WFPC2 IMAGE WF3-FIX F606W 2 2 none none 2 N/A IC-CENTER NGC-4261-WFPC2-MOSA 3 WFPC2 IMAGE WF3-FIX F606W 1 1 none none 3 N/A IC-CENTER NGC-4261-WFPC2-MOSA 3 WFPC2 IMAGE WF3-FIX F606W 1 2 none none 3 N/A IC-CENTER NGC-4261-WFPC2-MOSA 3 WFPC2 IMAGE WF3-FIX F606W 2 1 none none 3 N/A IC-CENTER 11339( 6) - 22-Feb-2008 15:28:46 - [ 6] 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-4261-WFPC2-MOSA 3 WFPC2 IMAGE WF3-FIX F606W 2 2 none none 3 N/A IC-CENTER 11339( 6) - 22-Feb-2008 15:28:46 - [ 7] Visit: 02 Visit Priority: Visit Requirements: ORIENT 280.0D TO 295.0 D; ORIENT 0.0D TO 0.0 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 NGC-4261-WF WFPC2 IMAGE WF3-FIX F450W CR-SPLIT=NO, ATD-GAIN=7 1 400.0 S POS TARG 25.0, -105.0; PC2-MOSAIC- PATTERN 2 1 CENTER ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-4261-WF WFPC2 IMAGE WF3-FIX F450W CR-SPLIT=NO, ATD-GAIN=7 1 400.0 S GS ACQ SCENARIO SINGLE; PC2-MOSAIC- PATTERN 2 2 CENTER ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-4261-WF WFPC2 IMAGE WF3-FIX F450W CR-SPLIT=NO, ATD-GAIN=7 1 400.0 S POS TARG -30.0, 105.0; PC2-MOSAIC- GS ACQ SCENARIO SINGLE; CENTER PATTERN 2 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F450W 1 1 none none 1 N/A IC-CENTER NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F450W 1 2 none none 1 N/A IC-CENTER NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F450W 2 1 none none 1 N/A IC-CENTER NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F450W 2 2 none none 1 N/A IC-CENTER NGC-4261-WFPC2-MOSA 2 WFPC2 IMAGE WF3-FIX F450W 1 1 none none 2 N/A IC-CENTER NGC-4261-WFPC2-MOSA 2 WFPC2 IMAGE WF3-FIX F450W 1 2 none none 2 N/A IC-CENTER NGC-4261-WFPC2-MOSA 2 WFPC2 IMAGE WF3-FIX F450W 2 1 none none 2 N/A IC-CENTER NGC-4261-WFPC2-MOSA 2 WFPC2 IMAGE WF3-FIX F450W 2 2 none none 2 N/A IC-CENTER NGC-4261-WFPC2-MOSA 3 WFPC2 IMAGE WF3-FIX F450W 1 1 none none 3 N/A IC-CENTER NGC-4261-WFPC2-MOSA 3 WFPC2 IMAGE WF3-FIX F450W 1 2 none none 3 N/A IC-CENTER NGC-4261-WFPC2-MOSA 3 WFPC2 IMAGE WF3-FIX F450W 2 1 none none 3 N/A IC-CENTER 11339( 6) - 22-Feb-2008 15:28:46 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-4261-WFPC2-MOSA 3 WFPC2 IMAGE WF3-FIX F450W 2 2 none none 3 N/A IC-CENTER 11339( 6) - 22-Feb-2008 15:28:46 - [ 9] Visit: 03 Visit Priority: Visit Requirements: ORIENT 280.0D TO 295.0 D; ORIENT 0.0D TO 0.0 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 NGC-4261-WF WFPC2 IMAGE WF3-FIX F814W CR-SPLIT=NO, ATD-GAIN=7 1 400.0 S POS TARG 25.0, -105.0; PC2-MOSAIC- PATTERN 2 1 CENTER ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-4261-WF WFPC2 IMAGE WF3-FIX F814W CR-SPLIT=NO, ATD-GAIN=7 1 400.0 S GS ACQ SCENARIO SINGLE; PC2-MOSAIC- PATTERN 2 2 CENTER ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC-4261-WF WFPC2 IMAGE WF3-FIX F814W CR-SPLIT=NO, ATD-GAIN=7 1 400.0 S POS TARG -30.0, 105.0; PC2-MOSAIC- GS ACQ SCENARIO SINGLE; CENTER PATTERN 2 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F814W 1 1 none none 1 N/A IC-CENTER NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F814W 1 2 none none 1 N/A IC-CENTER NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F814W 2 1 none none 1 N/A IC-CENTER NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F814W 2 2 none none 1 N/A IC-CENTER NGC-4261-WFPC2-MOSA 2 WFPC2 IMAGE WF3-FIX F814W 1 1 none none 2 N/A IC-CENTER NGC-4261-WFPC2-MOSA 2 WFPC2 IMAGE WF3-FIX F814W 1 2 none none 2 N/A IC-CENTER NGC-4261-WFPC2-MOSA 2 WFPC2 IMAGE WF3-FIX F814W 2 1 none none 2 N/A IC-CENTER NGC-4261-WFPC2-MOSA 2 WFPC2 IMAGE WF3-FIX F814W 2 2 none none 2 N/A IC-CENTER NGC-4261-WFPC2-MOSA 3 WFPC2 IMAGE WF3-FIX F814W 1 1 none none 3 N/A IC-CENTER NGC-4261-WFPC2-MOSA 3 WFPC2 IMAGE WF3-FIX F814W 1 2 none none 3 N/A IC-CENTER NGC-4261-WFPC2-MOSA 3 WFPC2 IMAGE WF3-FIX F814W 2 1 none none 3 N/A IC-CENTER 11339( 6) - 22-Feb-2008 15:28:46 - [ 10] 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-4261-WFPC2-MOSA 3 WFPC2 IMAGE WF3-FIX F814W 2 2 none none 3 N/A IC-CENTER 11339( 6) - 22-Feb-2008 15:28:46 - [ 11] Visit: 13 Visit Priority: Visit Requirements: ORIENT 280.0D TO 295.0 D; ORIENT 0.0D TO 0.0 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 NGC-4261-WF WFPC2 IMAGE WF3-FIX F814W CR-SPLIT=NO, ATD-GAIN=7 1 400.0 S GS ACQ SCENARIO SINGLE; PC2-MOSAIC- PATTERN 2 1 CENTER ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F814W 1 1 none none 1 N/A IC-CENTER NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F814W 1 2 none none 1 N/A IC-CENTER NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F814W 2 1 none none 1 N/A IC-CENTER NGC-4261-WFPC2-MOSA 1 WFPC2 IMAGE WF3-FIX F814W 2 2 none none 1 N/A IC-CENTER 11339( 6) - 22-Feb-2008 15:28:46 - [ 12] Summary Form for Proposal 11339 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WF3-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ATD-GAIN=7, CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GS ACQ SCENARIO SINGLE, ORIENT 0.0D TO 0.0 D, ORIENT 280.0D TO 295.0 D, PATTERN 2 1, PATTERN 2 2, PATTERN 2 3, POS TARG -30.0, 105.0, POS TARG 25.0, -105.0 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F450W, F606W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC-4261-WFPC2-MOSAIC-CENTER ------------------------------------------------------------------------------------------------------------------------------------