10546( 3) - 07/27/05 12:40 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 10546 Version: 3 Check-in Time: 27-Jul-2005 16:39:45 Title The filaments of NGC1275 ------------------------------------------------------------------------------------ Type Cycle Parallel Pointing Tolerance GO 14 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Andrew C. Fabian University of Cambridge CoI: Dr. Carolin S. Crawford University of Cambridge N CoI: Dr. Christopher Conselice California Institute of Technology N CoI: Prof. John S. Gallagher III University of Wisconsin - Madison N CoI: Prof. Ellen Zweibel University of Wisconsin - Madison N ------------------------------------------------------------------------------------ Abstract The spectacular H-0alpha filaments stretching over 100 kpc around the central galaxy in the nearby Perseus cluster of galaxies, NGC1275, resemble those found around distant radio galaxies and some protogalaxies. The origin and ionization of the filaments are poorly understood and relate to heating and cooling processes in galaxy formation and evolution. We propose here to image the filaments in order to reveal their true small-scale structure and to search for clumps of young stars along them. The observations will produce the first deep high resolution images of the whole filament system and, with our 1 Ms Chandra image, constrain both particle and photon ionization models for its ionization and excitation. ------------------------------------------------------------------------------------ 10546( 3) - 07/27/05 12:40 - [ 2] Observations Description ------------------------ We propose to observe NGC1275 and its surroundings in 3 filters, F550M (mostly line free), F625W (includes \halpha) and F435W (includes [OII] and provides blue photometry of star clusters), targetting 4 positions (the corners of a rectangle of width 1 arcmin and depth 1.33 arcmin) with substantial overlap. This way we observe the central 3 arcmin wide region deeply and also cover the outer arcmin in the search for weak filaments. The brightest filaments have an \halpha\ surface brightness of a few times $10^{-15}$~erg~s$^{-1}$~cm$^{- 2}$~arcsec$^{-2}$ (Conselice et al 2001). We intend to go to a fraction of this flux on subarcsec scales. For an extended emission-line source with $3\times 10^{-16}$~erg~s$^{-1}$~cm$^{-2}$~arcsec$^{-2}$ to reach $S/N = 5$ in a 2x2 pixel region (0.1x0.1 arcsec) takes $\sim24$~ks for F625W. A star cluster, comparable to the brighter ones detected, with $10^6$~M$_{\sun}$ has abs. $V = -12.25$ and $-10.52$ after 100 Myrs and a Gyr. To detect these will take 24 s - - 160 s in F625W and 42 s-- 300 s in F435W to a $S/N\sim20$. $10^4$~M$_{\sun}$ clusters will have magnitudes 5 times fainter, which will require a minimum of $\sim2500$~s. $V = 27$ is reached with an A star spectrum and $S/N = 10$ in 4000s. This gives an absolute magnitude limit of $-7.4$, in which we could detect $10^4$~M$_{\sun}$ star clusters that are 100 Myrs old to 5 sigma. For ionization of the gas we require massive young stars, which may have a more patchy distribution than older A stars. We shall search for a statistical excess of sources along the filaments. Therefore, the known filaments and possible large star clusters will be detected straightforwardly (see Figs. 1 and 2 and discussion in Duplication justification section for a demonstration from existing images). Fine-scale detail will be resolved in the filaments and we will be sensitive to smaller star clusters. With the better efficiency of ACS and the multiple coverage of the inner regions (21.6~ks per filter where they overlap) our proposed signal should be 10 times better than the existing WFPC2 data (Figs 1 and 2). We request 5400~s (2 orbits) for each of the 4 pointings in each of three filters, totalling 24 orbits. We have assumed here about 15 min per orbit for guide star, pointing and `cosmic ray split' times, leaving about 2700~s per HST orbit. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 10546( 3) - 07/27/05 12:40 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC1275-NW CLUSTER OF GALAXIES, RA=03H19M45.3000S +/- 0.1", J2000 V = 11.0 COOLING FLOW, FILAMENT, DEC=+41D32'0.00" +/- 0.1" EMISSION LINE NEBULA Coordinate Source: GUIDE_STAR_CATALOG 2 NGC1275-SW CLUSTER OF GALAXIES, RA=03H19M45.3000S +/- 0.1", J2000 V = 11.0 COOLING FLOW, EMISSION DEC=+41D30'40.00" +/- 0.1" LINE NEBULA, FILAMENT Coordinate Source: GUIDE_STAR_CATALOG 3 NGC1275-NE CLUSTER OF GALAXIES, RA=03H19M50.5000S +/- 0.1", J2000 V = 11.0 COOLING FLOW, EMISSION DEC=+41D32'0.00" +/- 0.1" LINE NEBULA, FILAMENT Coordinate Source: GUIDE_STAR_CATALOG 4 NGC1275-SE CLUSTER OF GALAXIES, RA=03H19M50.5000S +/- 0.1", J2000 V = 11.0 COOLING FLOW, EMISSION DEC=+41D30'40.00" +/- 0.1" LINE NEBULA, FILAMENT Coordinate Source: GUIDE_STAR_CATALOG 10546( 3) - 07/27/05 12:40 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 3.011 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.28 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 10546( 3) - 07/27/05 12:40 - [ 5] Visit: 01 Visit Priority: 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC1275-NW ACS/WFC ACCUM WFCENTER F550M CR-SPLIT=NO 1 800 S PATTERN 1 1 see below ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC1275-NW ACS/WFC ACCUM WFCENTER F625W CR-SPLIT=NO 1 800 S PATTERN 1 2 see below ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC1275-NW ACS/WFC ACCUM WFCENTER F435W CR-SPLIT=NO 1 800 S PATTERN 1 3 see below ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC1275-NW ACS/WFC ACCUM WFCENTER F550M CR-SPLIT=NO 1 800 S PATTERN 1 4 see below ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC1275-NW ACS/WFC ACCUM WFCENTER F625W CR-SPLIT=NO 1 800 S PATTERN 1 5 see below ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC1275-NW ACS/WFC ACCUM WFCENTER F435W CR-SPLIT=NO 1 800 S PATTERN 1 6 see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC1275-NW 1 ACS/WFC ACCUM WFCENTER F550M 1 none none none 1 806.0 S NGC1275-NW 1 ACS/WFC ACCUM WFCENTER F550M 2 none none none 1 806.0 S NGC1275-NW 1 ACS/WFC ACCUM WFCENTER F550M 3 none none none 1 806.0 S NGC1275-NW 2 ACS/WFC ACCUM WFCENTER F625W 1 none none none 2 827.0 S NGC1275-NW 2 ACS/WFC ACCUM WFCENTER F625W 2 none none none 2 827.0 S NGC1275-NW 2 ACS/WFC ACCUM WFCENTER F625W 3 none none none 2 827.0 S NGC1275-NW 3 ACS/WFC ACCUM WFCENTER F435W 1 none none none 3 815.0 S NGC1275-NW 3 ACS/WFC ACCUM WFCENTER F435W 2 none none none 3 815.0 S NGC1275-NW 3 ACS/WFC ACCUM WFCENTER F435W 3 none none none 3 815.0 S NGC1275-NW 4 ACS/WFC ACCUM WFCENTER F550M 1 none none none 4 813.0 S NGC1275-NW 4 ACS/WFC ACCUM WFCENTER F550M 2 none none none 4 813.0 S NGC1275-NW 4 ACS/WFC ACCUM WFCENTER F550M 3 none none none 4 813.0 S NGC1275-NW 5 ACS/WFC ACCUM WFCENTER F625W 1 none none none 5 827.0 S NGC1275-NW 5 ACS/WFC ACCUM WFCENTER F625W 2 none none none 5 827.0 S NGC1275-NW 5 ACS/WFC ACCUM WFCENTER F625W 3 none none none 5 827.0 S NGC1275-NW 6 ACS/WFC ACCUM WFCENTER F435W 1 none none none 6 824.0 S NGC1275-NW 6 ACS/WFC ACCUM WFCENTER F435W 2 none none none 6 824.0 S 10546( 3) - 07/27/05 12:40 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC1275-NW 6 ACS/WFC ACCUM WFCENTER F435W 3 none none none 6 824.0 S 10546( 3) - 07/27/05 12:40 - [ 7] Visit: 02 Visit Priority: 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC1275-SW ACS/WFC ACCUM WFCENTER F550M CR-SPLIT=NO 1 800 S PATTERN 1 1 see below ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC1275-SW ACS/WFC ACCUM WFCENTER F625W CR-SPLIT=NO 1 800 S PATTERN 1 2 see below ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC1275-SW ACS/WFC ACCUM WFCENTER F435W CR-SPLIT=NO 1 800 S PATTERN 1 3 see below ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC1275-SW ACS/WFC ACCUM WFCENTER F550M CR-SPLIT=NO 1 800 S PATTERN 1 4 see below ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC1275-SW ACS/WFC ACCUM WFCENTER F625W CR-SPLIT=NO 1 800 S PATTERN 1 5 see below ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC1275-SW ACS/WFC ACCUM WFCENTER F435W CR-SPLIT=NO 1 800 S PATTERN 1 6 see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC1275-SW 1 ACS/WFC ACCUM WFCENTER F550M 1 none none none 1 806.0 S NGC1275-SW 1 ACS/WFC ACCUM WFCENTER F550M 2 none none none 1 806.0 S NGC1275-SW 1 ACS/WFC ACCUM WFCENTER F550M 3 none none none 1 806.0 S NGC1275-SW 2 ACS/WFC ACCUM WFCENTER F625W 1 none none none 2 827.0 S NGC1275-SW 2 ACS/WFC ACCUM WFCENTER F625W 2 none none none 2 827.0 S NGC1275-SW 2 ACS/WFC ACCUM WFCENTER F625W 3 none none none 2 827.0 S NGC1275-SW 3 ACS/WFC ACCUM WFCENTER F435W 1 none none none 3 815.0 S NGC1275-SW 3 ACS/WFC ACCUM WFCENTER F435W 2 none none none 3 815.0 S NGC1275-SW 3 ACS/WFC ACCUM WFCENTER F435W 3 none none none 3 815.0 S NGC1275-SW 4 ACS/WFC ACCUM WFCENTER F550M 1 none none none 4 813.0 S NGC1275-SW 4 ACS/WFC ACCUM WFCENTER F550M 2 none none none 4 813.0 S NGC1275-SW 4 ACS/WFC ACCUM WFCENTER F550M 3 none none none 4 813.0 S NGC1275-SW 5 ACS/WFC ACCUM WFCENTER F625W 1 none none none 5 827.0 S NGC1275-SW 5 ACS/WFC ACCUM WFCENTER F625W 2 none none none 5 827.0 S NGC1275-SW 5 ACS/WFC ACCUM WFCENTER F625W 3 none none none 5 827.0 S NGC1275-SW 6 ACS/WFC ACCUM WFCENTER F435W 1 none none none 6 824.0 S NGC1275-SW 6 ACS/WFC ACCUM WFCENTER F435W 2 none none none 6 824.0 S 10546( 3) - 07/27/05 12:40 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC1275-SW 6 ACS/WFC ACCUM WFCENTER F435W 3 none none none 6 824.0 S 10546( 3) - 07/27/05 12:40 - [ 9] Visit: 03 Visit Priority: 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC1275-NE ACS/WFC ACCUM WFCENTER F550M CR-SPLIT=NO 1 800 S PATTERN 1 1 see below ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC1275-NE ACS/WFC ACCUM WFCENTER F625W CR-SPLIT=NO 1 800 S PATTERN 1 2 see below ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC1275-NE ACS/WFC ACCUM WFCENTER F435W CR-SPLIT=NO 1 800 S PATTERN 1 3 see below ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC1275-NE ACS/WFC ACCUM WFCENTER F550M CR-SPLIT=NO 1 800 S PATTERN 1 4 see below ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC1275-NE ACS/WFC ACCUM WFCENTER F625W CR-SPLIT=NO 1 800 S PATTERN 1 5 see below ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC1275-NE ACS/WFC ACCUM WFCENTER F435W CR-SPLIT=NO 1 800 S PATTERN 1 6 see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC1275-NE 1 ACS/WFC ACCUM WFCENTER F550M 1 none none none 1 806.0 S NGC1275-NE 1 ACS/WFC ACCUM WFCENTER F550M 2 none none none 1 806.0 S NGC1275-NE 1 ACS/WFC ACCUM WFCENTER F550M 3 none none none 1 806.0 S NGC1275-NE 2 ACS/WFC ACCUM WFCENTER F625W 1 none none none 2 827.0 S NGC1275-NE 2 ACS/WFC ACCUM WFCENTER F625W 2 none none none 2 827.0 S NGC1275-NE 2 ACS/WFC ACCUM WFCENTER F625W 3 none none none 2 827.0 S NGC1275-NE 3 ACS/WFC ACCUM WFCENTER F435W 1 none none none 3 815.0 S NGC1275-NE 3 ACS/WFC ACCUM WFCENTER F435W 2 none none none 3 815.0 S NGC1275-NE 3 ACS/WFC ACCUM WFCENTER F435W 3 none none none 3 815.0 S NGC1275-NE 4 ACS/WFC ACCUM WFCENTER F550M 1 none none none 4 813.0 S NGC1275-NE 4 ACS/WFC ACCUM WFCENTER F550M 2 none none none 4 813.0 S NGC1275-NE 4 ACS/WFC ACCUM WFCENTER F550M 3 none none none 4 813.0 S NGC1275-NE 5 ACS/WFC ACCUM WFCENTER F625W 1 none none none 5 827.0 S NGC1275-NE 5 ACS/WFC ACCUM WFCENTER F625W 2 none none none 5 827.0 S NGC1275-NE 5 ACS/WFC ACCUM WFCENTER F625W 3 none none none 5 827.0 S NGC1275-NE 6 ACS/WFC ACCUM WFCENTER F435W 1 none none none 6 824.0 S NGC1275-NE 6 ACS/WFC ACCUM WFCENTER F435W 2 none none none 6 824.0 S 10546( 3) - 07/27/05 12:40 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC1275-NE 6 ACS/WFC ACCUM WFCENTER F435W 3 none none none 6 824.0 S 10546( 3) - 07/27/05 12:40 - [ 11] Visit: 04 Visit Priority: 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC1275-SE ACS/WFC ACCUM WFCENTER F550M CR-SPLIT=NO 1 800 S PATTERN 1 1 see below ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC1275-SE ACS/WFC ACCUM WFCENTER F625W CR-SPLIT=NO 1 800 S PATTERN 1 2 see below ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC1275-SE ACS/WFC ACCUM WFCENTER F435W CR-SPLIT=NO 1 800 S PATTERN 1 3 see below ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC1275-SE ACS/WFC ACCUM WFCENTER F550M CR-SPLIT=NO 1 800 S PATTERN 1 4 see below ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC1275-SE ACS/WFC ACCUM WFCENTER F625W CR-SPLIT=NO 1 800 S PATTERN 1 5 see below ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC1275-SE ACS/WFC ACCUM WFCENTER F435W CR-SPLIT=NO 1 800 S PATTERN 1 6 see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC1275-SE 1 ACS/WFC ACCUM WFCENTER F550M 1 none none none 1 806.0 S NGC1275-SE 1 ACS/WFC ACCUM WFCENTER F550M 2 none none none 1 806.0 S NGC1275-SE 1 ACS/WFC ACCUM WFCENTER F550M 3 none none none 1 806.0 S NGC1275-SE 2 ACS/WFC ACCUM WFCENTER F625W 1 none none none 2 827.0 S NGC1275-SE 2 ACS/WFC ACCUM WFCENTER F625W 2 none none none 2 827.0 S NGC1275-SE 2 ACS/WFC ACCUM WFCENTER F625W 3 none none none 2 827.0 S NGC1275-SE 3 ACS/WFC ACCUM WFCENTER F435W 1 none none none 3 815.0 S NGC1275-SE 3 ACS/WFC ACCUM WFCENTER F435W 2 none none none 3 815.0 S NGC1275-SE 3 ACS/WFC ACCUM WFCENTER F435W 3 none none none 3 815.0 S NGC1275-SE 4 ACS/WFC ACCUM WFCENTER F550M 1 none none none 4 813.0 S NGC1275-SE 4 ACS/WFC ACCUM WFCENTER F550M 2 none none none 4 813.0 S NGC1275-SE 4 ACS/WFC ACCUM WFCENTER F550M 3 none none none 4 813.0 S NGC1275-SE 5 ACS/WFC ACCUM WFCENTER F625W 1 none none none 5 827.0 S NGC1275-SE 5 ACS/WFC ACCUM WFCENTER F625W 2 none none none 5 827.0 S NGC1275-SE 5 ACS/WFC ACCUM WFCENTER F625W 3 none none none 5 827.0 S NGC1275-SE 6 ACS/WFC ACCUM WFCENTER F435W 1 none none none 6 824.0 S NGC1275-SE 6 ACS/WFC ACCUM WFCENTER F435W 2 none none none 6 824.0 S 10546( 3) - 07/27/05 12:40 - [ 12] 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC1275-SE 6 ACS/WFC ACCUM WFCENTER F435W 3 none none none 6 824.0 S 10546( 3) - 07/27/05 12:40 - [ 13] Summary Form for Proposal 10546 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFCENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1 PATTERN 1 2 PATTERN 1 3 PATTERN 1 4 PATTERN 1 5 PATTERN 1 6 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F550M F625W F435W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC1275-NW NGC1275-SW NGC1275-NE NGC1275-SE ------------------------------------------------------------------------------------------------------------------------------------