9689( 3) - 11/07/02 06:31 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 9689 Version: 3 Check-in Date: 07-Nov-2002 06:30:38 1.Proposal Title: The Impending Destruction of NGC 1427A ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 11 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Michael Gregg University of California - Davis CoI: Michael Drinkwater University of Queensland N CoI: Bradford Holden University of California, Davis N ------------------------------------------------------------------------------------ 5. Abstract The Fornax cluster member NGC 1427A provides a spectacular example of a hot ICM and cluster potential operating on a gas-rich irregular galaxy. On its first passage through the cluster core, NGC 1427A is being disrupted by the influence of the hot ICM, its own vigorous star formation, and the cluster tidal field. We propose joint Chandra/HST imaging of this x-ray source to explore the details of the impending galaxy destruction. Such events are common in the lives of clusters, and help build the intracluster components. NGC 1427A provides a snapshot of the progenitor ingredients about 1 Gyr prior to becoming true intracluster material, and a chance to study the forces which shred galaxies and build cluster gas and stellar components over a Hubble time. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will obtain dithered broad band ACS/WFC observations of NGC1427A using the SDSS filter set, plus narrow band images with F660N (Halpha at the redshift of our target). We will supplement these with two orbits of WFPC2 F336W (U-band) images. During the ACS imaging, we will obtain parallel WFPC2 F606W and F814W imaging of a field in the Fornax cluster. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 9689( 3) - 11/07/02 06:31 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC1427A-ACS GALAXY, AMORPHOUS RA=03H 40M 10.74S +/- 0", DEC=- J2000 V=+2028 B = 13.5 IRREGULAR 35D 37' 16.0" +/- 0", PLATE- B-R = 0.70 ID=02IX Coordinate Source: GUIDE_STAR_CATALOG 2 NGC1427A-PC1 GALAXY, AMORPHOUS RA=03H 40M 10.24S +/- 0", DEC=- J2000 V=+2028 B = 13.5 IRREGULAR 35D 36' 47.7" +/- 0", PLATE- B-R = 0.70 ID=02IX Coordinate Source: GUIDE_STAR_CATALOG 9689( 3) - 11/07/02 06:31 - [ 3] Visit: 01 Visit Priority: Visit Requirements: ORIENT 65D TO 80D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 101 NGC1427A-AC ACS/WF ACCUM WFC F475W CR-SPLIT=NO 1 460 S POS TARG 0.0, 0.0 PAR S C 191-192 with 101-105 ------------------------------------------------------------------------------------------------------------------------------------ 102 NGC1427A-AC ACS/WF ACCUM WFC F775W CR-SPLIT=NO 1 350 S POS TARG 0.0, 0.0 S C ------------------------------------------------------------------------------------------------------------------------------------ 103 NGC1427A-AC ACS/WF ACCUM WFC F625W CR-SPLIT=NO 1 440 S POS TARG 0.0, 0.0 S C ------------------------------------------------------------------------------------------------------------------------------------ 104 NGC1427A-AC ACS/WF ACCUM WFC F850LP CR-SPLIT=NO 1 360 S POS TARG 0.0, 0.0 S C ------------------------------------------------------------------------------------------------------------------------------------ 105 NGC1427A-AC ACS/WF ACCUM WFC F660N CR-SPLIT=NO 1 410 S POS TARG 0.0, 0.0 S C ------------------------------------------------------------------------------------------------------------------------------------ 191 ANY WFPC2 IMAGE PC1 F606W CLOCKS=YES ,CR-SPLIT=NO 1 1500 S ------------------------------------------------------------------------------------------------------------------------------------ 192 ANY WFPC2 IMAGE PC1 F606W CLOCKS=YES ,CR-SPLIT=NO 1 1100 S ------------------------------------------------------------------------------------------------------------------------------------ 201 NGC1427A-AC ACS/WF ACCUM WFC F475W CR-SPLIT=NO 1 500 S POS TARG 0.248, 3.001 PAR S C 291-292 with 201-205 ------------------------------------------------------------------------------------------------------------------------------------ 202 NGC1427A-AC ACS/WF ACCUM WFC F775W CR-SPLIT=NO 1 360 S POS TARG 0.248, 3.001 S C ------------------------------------------------------------------------------------------------------------------------------------ 203 NGC1427A-AC ACS/WF ACCUM WFC F625W CR-SPLIT=NO 1 460 S POS TARG 0.248, 3.001 S C ------------------------------------------------------------------------------------------------------------------------------------ 204 NGC1427A-AC ACS/WF ACCUM WFC F850LP CR-SPLIT=NO 1 370 S POS TARG 0.248, 3.001 S C ------------------------------------------------------------------------------------------------------------------------------------ 205 NGC1427A-AC ACS/WF ACCUM WFC F660N CR-SPLIT=NO 1 460 S POS TARG 0.248, 3.001 S C ------------------------------------------------------------------------------------------------------------------------------------ 291 ANY WFPC2 IMAGE PC1 F606W CR-SPLIT=NO ,CLOCKS=YES 1 1500 S ------------------------------------------------------------------------------------------------------------------------------------ 292 ANY WFPC2 IMAGE PC1 F606W CR-SPLIT=NO ,CLOCKS=YES 1 1200 S ------------------------------------------------------------------------------------------------------------------------------------ 301 NGC1427A-AC ACS/WF ACCUM WFC F475W CR-SPLIT=NO 1 500 S POS TARG 0.496, 6.002 PAR S C 391-392 with 301-305 ------------------------------------------------------------------------------------------------------------------------------------ 302 NGC1427A-AC ACS/WF ACCUM WFC F775W CR-SPLIT=NO 1 360 S POS TARG 0.496, 6.002 S C ------------------------------------------------------------------------------------------------------------------------------------ 9689( 3) - 11/07/02 06:31 - [ 4] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 303 NGC1427A-AC ACS/WF ACCUM WFC F625W CR-SPLIT=NO 1 460 S POS TARG 0.496, 6.002 S C ------------------------------------------------------------------------------------------------------------------------------------ 304 NGC1427A-AC ACS/WF ACCUM WFC F850LP CR-SPLIT=NO 1 370 S POS TARG 0.496, 6.002 S C ------------------------------------------------------------------------------------------------------------------------------------ 305 NGC1427A-AC ACS/WF ACCUM WFC F660N CR-SPLIT=NO 1 460 S POS TARG 0.496, 6.002 S C ------------------------------------------------------------------------------------------------------------------------------------ 391 ANY WFPC2 IMAGE PC1 F814W CR-SPLIT=NO ,CLOCKS=YES 1 1500 S ------------------------------------------------------------------------------------------------------------------------------------ 392 ANY WFPC2 IMAGE PC1 F814W CR-SPLIT=NO ,CLOCKS=YES 1 1200 S ------------------------------------------------------------------------------------------------------------------------------------ 401 NGC1427A-AC ACS/WF ACCUM WFC F475W CR-SPLIT=NO 1 500 S POS TARG 0.744, 9.002 PAR S C 491-492 with 401-405 ------------------------------------------------------------------------------------------------------------------------------------ 402 NGC1427A-AC ACS/WF ACCUM WFC F775W CR-SPLIT=NO 1 360 S POS TARG 0.744, 9.002 S C ------------------------------------------------------------------------------------------------------------------------------------ 403 NGC1427A-AC ACS/WF ACCUM WFC F625W CR-SPLIT=NO 1 460 S POS TARG 0.744, 9.002 S C ------------------------------------------------------------------------------------------------------------------------------------ 404 NGC1427A-AC ACS/WF ACCUM WFC F850LP CR-SPLIT=NO 1 370 S POS TARG 0.744, 9.002 S C ------------------------------------------------------------------------------------------------------------------------------------ 405 NGC1427A-AC ACS/WF ACCUM WFC F660N CR-SPLIT=NO 1 460 S POS TARG 0.744, 9.002 S C ------------------------------------------------------------------------------------------------------------------------------------ 491 ANY WFPC2 IMAGE PC1 F814W CR-SPLIT=NO ,CLOCKS=YES 1 1500 S ------------------------------------------------------------------------------------------------------------------------------------ 492 ANY WFPC2 IMAGE PC1 F814W CR-SPLIT=NO ,CLOCKS=YES 1 1200 S ------------------------------------------------------------------------------------------------------------------------------------ 9689( 3) - 11/07/02 06:31 - [ 5] Visit: 02 Visit Priority: Visit Requirements: ORIENT 333D TO 20D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 101 NGC1427A-PC WFPC2 IMAGE PC1 F336W CR-SPLIT=NO ,CLOCKS=YES 1 1300 S POS TARG 0.50, 0.25 1 ------------------------------------------------------------------------------------------------------------------------------------ 102 NGC1427A-PC WFPC2 IMAGE PC1 F336W CR-SPLIT=NO ,CLOCKS=YES 1 1200 S POS TARG 0.0, 0.0 1 ------------------------------------------------------------------------------------------------------------------------------------ 103 NGC1427A-PC WFPC2 IMAGE PC1 F336W CR-SPLIT=NO ,CLOCKS=YES 1 1300 S POS TARG 6.029, 6.029 1 Comments: 1-2 of 6 F606W ------------------------------------------------------------------------------------------------------------------------------------ 104 NGC1427A-PC WFPC2 IMAGE PC1 F336W CR-SPLIT=NO ,CLOCKS=YES 1 1300 S POS TARG 5.529, 5.779 1 ------------------------------------------------------------------------------------------------------------------------------------ 9689( 3) - 11/07/02 06:31 - [ 6] Summary Form for Proposal 9689 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFC PC1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO CLOCKS=YES ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 65D TO 80D POS TARG 0.0, 0.0 PAR 191-192 with 101-105 POS TARG 0.0, 0.0 POS TARG 0.248, 3.001 PAR 291-292 with 201-205 POS TARG 0.248, 3.001 POS TARG 0.496, 6.002 PAR 391-392 with 301-305 POS TARG 0.496, 6.002 POS TARG 0.744, 9.002 PAR 491-492 with 401-405 POS TARG 0.744, 9.002 ORIENT 333D TO 20D POS TARG 0.50, 0.25 POS TARG 6.029, 6.029 POS TARG 5.529, 5.779 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F475W F775W F625W F850LP F660N F606W F814W F336W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC1427A-ACS ANY NGC1427A-PC1 ------------------------------------------------------------------------------------------------------------------------------------