9274( 3) - 10/03/02 08:36 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 9274 Version: 3 Check-in Date: 03-Oct-2002 08:35:00 1.Proposal Title: Cluster-Galaxy Interactions in the Coma Cluster ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 10 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Michael Gregg University of California - Davis ------------------------------------------------------------------------------------ 5. Abstract The vigorously star forming galaxy NGC 4911 provides a spectacular example of a luminous spiral on its first passage through the hot intracluster medium of the Coma cluster. ACIS-I imaging of NGC 4911 and its environs will complement HST Cycle 8 WFPC2 imaging and reveal the role of the X-ray gas in driving star formation and generating tidal debris. To further explore this connection, we request 4 orbits of HST/WFPC2 H-alpha imaging. The ACIS-I image will also contain the giant spiral NGC 4921, another X-ray source interacting with the intracluster medium. In addition, the ACIS-I image will provide deep, high resolution look at the Coma intracluster medium over a wide range of X-ray surface brightness. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will image two fields using the F673N filter, spending 2 orbits per field. At the redshift of the target galaxy, NGC4911, F673N becomes a narrow band Halpha filter. These exposures provide complementary data to the F606W and F814W images obtained of these fields during GO8208. Two WFPC2 fields are required to image NGC4911 and its associated LSB feature. STIS parallel imaging using the 50CCD bandpasses will also be used to obtain deep images of additional fields on or near smaller early type galaxies in the Coma cluster. In a 2 orbit integration with average zodiacal light and Earthshine, STIS images will reach a S/N ~ 5 in each passband for globular clusters with V=28.5, about 1 magnitude fainter than the peak of the luminosity function. All exposures will be CRsplit and dithered. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 9274( 3) - 10/03/02 08:36 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC4911-NUC GALAXY, SPIRAL RA=13H 00M 55.77S +/- 0S, J2000 V=+7985 V = 13.00 DEC=+27D 47' 29.0" +/-0"PLATE- B-V = 0.70 ID=002K Coordinate Source: GSC_SURVEY_PLATE Comments: PC centered on nucleus 2 COMA-DEBRIS- GALAXY, LSB RA=13H 01M 00.723S +/- 0S, J2000 V=+7985 V = 17.00 3 DEC=+27D 45' 18.0" +/-0"PLATE- B-V = 0.70 ID=002K Coordinate Source: GSC_SURVEY_PLATE Comments: WF3 on peak of debris 9274( 3) - 10/03/02 08:36 - [ 3] Visit: 01 Visit Priority: Visit Requirements: ORIENT 317D TO 317D On Hold Comments: Additional Comments: PC on nucleus; STIS to north on blank sky Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 101 NGC4911-NUC WFPC2 IMAGE PC1 F673N CR-SPLIT=0.5333 ,CLOCKS=YES 1 1600 S PAR 102-103 with 101 Comments: 1-2 of 6 F673N ------------------------------------------------------------------------------------------------------------------------------------ 102 ANY STIS/C ACCUM 50CCD MIRROR 1 1670 S CD Comments: 1-2 of 6 50CCD ------------------------------------------------------------------------------------------------------------------------------------ 103 ANY ACS/WF ACCUM WFC F625W 1 1360 S C Comments: 1-2 of 2 r' ------------------------------------------------------------------------------------------------------------------------------------ 104 NGC4911-NUC WFPC2 IMAGE PC1 F673N CR-SPLIT=NO ,CLOCKS=YES 1 800 S PAR 105-106 with 104 POS TARG 0.46667, 0.46667 Comments: 3 of 6 F673N ------------------------------------------------------------------------------------------------------------------------------------ 105 ANY STIS/C ACCUM 50CCD MIRROR CR-SPLIT=NO 1 890 S CD Comments: 3 of 6 50CCD ------------------------------------------------------------------------------------------------------------------------------------ 106 ANY ACS/WF ACCUM WFC F475W CR-SPLIT=NO 1 770 S C Comments: 1 of 2 g' ------------------------------------------------------------------------------------------------------------------------------------ 107 NGC4911-NUC WFPC2 IMAGE PC1 F673N CR-SPLIT=NO ,CLOCKS=YES 1 800 S PAR 108-109 with 107 POS TARG 0.46667, 0.46667 Comments: 4 of 6 F673N ------------------------------------------------------------------------------------------------------------------------------------ 108 ANY STIS/C ACCUM 50CCD MIRROR CR-SPLIT=NO 1 950 S CD Comments: 4 of 6 50CCD ------------------------------------------------------------------------------------------------------------------------------------ 109 ANY ACS/WF ACCUM WFC F475W CR-SPLIT=NO 1 800 S C Comments: 2 of 2 g' ------------------------------------------------------------------------------------------------------------------------------------ 110 NGC4911-NUC WFPC2 IMAGE PC1 F673N CR-SPLIT=0.5 ,CLOCKS=YES 1 1600 S PAR 111-112 with 110 POS TARG -0.46667, -0.46667 Comments: 5-6 of 6 F673N ------------------------------------------------------------------------------------------------------------------------------------ 111 ANY STIS/C ACCUM 50CCD MIRROR 1 1700 S CD Comments: 5-6 of 6 50CCD ------------------------------------------------------------------------------------------------------------------------------------ 9274( 3) - 10/03/02 08:36 - [ 4] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 112 ANY ACS/WF ACCUM WFC F775W 1 1490 S C Comments: 1-2 of 2 i' ------------------------------------------------------------------------------------------------------------------------------------ 9274( 3) - 10/03/02 08:36 - [ 5] Visit: 02 Visit Priority: Visit Requirements: ORIENT 227D TO 227D On Hold Comments: Additional Comments: Second of two visits for project Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 201 COMA-DEBRIS WFPC2 IMAGE WF3 F673N CR-SPLIT=0.5333 ,CLOCKS=YES 1 1600 S PAR 202 with 201 -3 Comments: 1-2 of 6 F673N ------------------------------------------------------------------------------------------------------------------------------------ 202 COMA-DEBRIS STIS/C ACCUM 50CCD MIRROR 1 1700 S -3 CD Comments: 1-2 of 12 50CCD ------------------------------------------------------------------------------------------------------------------------------------ 203 COMA-DEBRIS WFPC2 IMAGE WF3 F673N CR-SPLIT=NO ,CLOCKS=YES 1 800 S PAR 204 with 203 POS TARG -3 0.46667, 0.46667 Comments: 3 of 6 F673N ------------------------------------------------------------------------------------------------------------------------------------ 204 COMA-DEBRIS STIS/C ACCUM 50CCD MIRROR CR-SPLIT=NO 1 850 S -3 CD Comments: 3 of 12 50CCD ------------------------------------------------------------------------------------------------------------------------------------ 205 COMA-DEBRIS WFPC2 IMAGE WF3 F673N CR-SPLIT=0.5333 ,CLOCKS=YES 1 1600 S PAR 206 with 205 POS TARG -3 -0.46667, -0.46667 Comments: 4-5 of 6 F673N ------------------------------------------------------------------------------------------------------------------------------------ 206 COMA-DEBRIS STIS/C ACCUM 50CCD MIRROR 1 1700 S -3 CD Comments: 4-5 of 12 50CCD ------------------------------------------------------------------------------------------------------------------------------------ 207 COMA-DEBRIS WFPC2 IMAGE WF3 F673N CR-SPLIT=NO ,CLOCKS=YES 1 800 S PAR 208 with 207 POS TARG -3 0.46667, 0.46667 Comments: 6 of 6 F673N ------------------------------------------------------------------------------------------------------------------------------------ 208 COMA-DEBRIS STIS/C ACCUM 50CCD MIRROR CR-SPLIT=NO 1 950 S -3 CD Comments: 6 of 12 50CCD ------------------------------------------------------------------------------------------------------------------------------------ 9274( 3) - 10/03/02 08:36 - [ 6] Summary Form for Proposal 9274 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PC1 50CCD WFC WF3 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 STIS/CCD ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=0.5333 CLOCKS=YES CR-SPLIT=NO CR-SPLIT=0.5 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 317D TO 317D PAR 102-103 with 101 PAR 105-106 with 104 POS TARG 0.46667, 0.46667 PAR 108-109 with 107 POS TARG 0.46667, 0.46667 PAR 111-112 with 110 POS TARG -0.46667, -0.46667 ORIENT 227D TO 227D PAR 202 with 201 PAR 204 with 203 POS TARG 0.46667, 0.46667 PAR 206 with 205 POS TARG -0.46667, -0.46667 PAR 208 with 207 POS TARG 0.46667, 0.46667 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F673N MIRROR F625W F475W F775W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC4911-NUC ANY COMA-DEBRIS-3 ------------------------------------------------------------------------------------------------------------------------------------