12174( 3) - 01-Oct-2010 12:15:55 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12174 Version: 3 Check-in Time: 01-Oct-2010 12:15:55 STScI Edit Number: 1 Title An HST/WFC3 mapping of optical emission lines from the nuclear spiral in M31 ------------------------------------------------------------------------------------ Type Cycle GO 18 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Zhiyuan Li Smithsonian Institution Astrophysical Observatory CoI: Prof. Q. Daniel Wang University of Massachusetts N CoI: Mr. Hui Dong University of Massachusetts N CoI: Dr. Christine Jones Smithsonian Institution Astrophysical N Observatory CoI: Dr. William R. Forman Smithsonian Institution Astrophysical N Observatory CoI: Dr. Ralph P. Kraft Smithsonian Institution Astrophysical N Observatory ------------------------------------------------------------------------------------ Abstract The nuclear spiral in M31, consisting of ionized and neutral dusty gas clouds of typically sub-parsec sizes, shows optical emission lines characteristic of LINERs. Yet the lack of UV radiation from either an active nucleus or massive young stars makes the ionizing source of this nearest LINER a longstanding puzzle. We propose a WFC/UVIS observation of the nuclear spiral, using appropriate narrow-band filters to map the H alpha, [N II] and [O III] lines. The resolving power of HST is essential to measuring the line intensities and their ratios from discrete gas clouds across the nuclear spiral, based on which we can derive the physical properties of gas such as density and ionization state. We will then assess the relative importance of ionization/excitation mechanisms, in particular UV radiation provided by evolved stars and heating by cosmic-rays, by confronting with theoretical models. This study advances our understanding of the regulation of galactic circumnuclear environments, which is in turn crucial to understanding the evolution of the central super-massive black hole and the host galaxy. ------------------------------------------------------------------------------------ Observations Description ------------------------ With the WFC3/UVIS and 8 allocated orbits, we will map four emission lines, [O II]3727, [O III]5007, H-alpha6563, and [N II]6583, from the central 150 arcsec X 150 arcsec region about the M31 nucleus. A total of seven filters will be used, including four on-line filters and three off-line filters for measuring the continuum. Based on the expected line intensities and desired S/N, each of the three filters, F373N, F656N and F658N, will be ultilized for one orbit, and the F502N filter will be ultilized for two oribits. Each of the three off-line continuum filters, F390M, F547M and F665N, will be ultilized for one oribit. Each orbit will have the same exposure design. We intend to use a 3-point 12174( 3) - 01-Oct-2010 12:15:55 - [ 2] pattern which is similar to WFC3-UVIS-MOSAIC-LINE pattern, but with the dither offsets of 36.33 and 71.33 pixels in the x and y directions. This 1/3 subpixel offset is chosen to optimize the PSF sampling. This pattern could also help to remove cosmic-rays and the CCD gap of WFC3. The exposure time for each pointing is 900 second for WFC3. Therefore, the total exposure time for each orbit is 2700 second. The overhead incurred during each orbit is as follows: 1) 333 s for the guide-star acquisition and instrument setup, b) 2700 s science exposures, c) 232 s for UVIS overhead for preparing the second and third exposures. The total time used is 3265 s, which can be fixed into one orbit, according to the APT of the latest version. With the ACS and 8 allocated paralell orbits, we will also sample the outer regions (about 6 arcminutes from the center) with narrow-band filters, F502N, .F658N, F660N (2 orbit for each) and the corresponding continuum F550M and F625W (1 orbit for each). The effective exposure time for each orbit is 2382 s Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 12174( 3) - 01-Oct-2010 12:15:55 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 M31-NUCLEAR- EXT-MEDIUM, EMISSION RA=00H42M44.3100S +/- 0.5", J2000 V = -300 V = 3.44 +/- 0.03 SPIRAL LINE NEBULA, NUCLEUS, DEC=+41D16'9.40" +/- 0.5" SPIRAL ARM Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 12174( 3) - 01-Oct-2010 12:15:55 - [ 4] Visit: 01 Visit Requirements: ORIENT 85D TO 85 D On Hold Comments: Additional Comments: We prefer setting the orientation angle to be 120 +/- 10 degree, in which case the parallel ACS observations will have an optimal coverage of an outer spiral arm. If this range is inconvenient to schedule, a broader range of 80-160 degree will still be good for the ACS field of view, as we tentatively set here for the Visit Orientation Requirements. We emphasize that the exact orientation has little effect for the prime WFC3 field of view, but we prefer having the same (or nearly same) orientation for all visits. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F373N 1 900 S PAR 2 WITH 1 -SPIRAL S ------------------------------------------------------------------------------------------------------------------------------------ 2 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F502N 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 3 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F373N 1 900 S POS TARG 1.43171, -SPIRAL S 2.91514; PAR 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F502N 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 5 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F373N 1 900 S POS TARG 2.86342, -SPIRAL S 5.83028; PAR 6 WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F502N 1 782 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ M31-NUCLEAR-SPIRAL 1 WFC3/UVI ACCUM UVIS-FIX F373N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 2 ACS/WFC ACCUM WFC-FIX F502N none none none none 1 N/A M31-NUCLEAR-SPIRAL 3 WFC3/UVI ACCUM UVIS-FIX F373N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 4 ACS/WFC ACCUM WFC-FIX F502N none none none none 1 N/A M31-NUCLEAR-SPIRAL 5 WFC3/UVI ACCUM UVIS-FIX F373N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 6 ACS/WFC ACCUM WFC-FIX F502N none none none none 1 N/A 12174( 3) - 01-Oct-2010 12:15:55 - [ 5] Visit: 02 Visit Requirements: SAME ORIENT AS 01 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 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F656N 1 900 S PAR 2 WITH 1 -SPIRAL S ------------------------------------------------------------------------------------------------------------------------------------ 2 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F502N 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 3 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F656N 1 900 S POS TARG 1.43171, -SPIRAL S 2.91514; PAR 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F502N 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 5 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F656N 1 900 S POS TARG 2.86342, -SPIRAL S 5.83028; PAR 6 WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F502N 1 782 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ M31-NUCLEAR-SPIRAL 1 WFC3/UVI ACCUM UVIS-FIX F656N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 2 ACS/WFC ACCUM WFC-FIX F502N none none none none 1 N/A M31-NUCLEAR-SPIRAL 3 WFC3/UVI ACCUM UVIS-FIX F656N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 4 ACS/WFC ACCUM WFC-FIX F502N none none none none 1 N/A M31-NUCLEAR-SPIRAL 5 WFC3/UVI ACCUM UVIS-FIX F656N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 6 ACS/WFC ACCUM WFC-FIX F502N none none none none 1 N/A 12174( 3) - 01-Oct-2010 12:15:55 - [ 6] Visit: 03 Visit Requirements: SAME ORIENT AS 01 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 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F658N 1 900 S PAR 2 WITH 1 -SPIRAL S ------------------------------------------------------------------------------------------------------------------------------------ 2 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F660N 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 3 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F658N 1 900 S POS TARG 2.86342, -SPIRAL S 5.83028; PAR 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F660N 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 5 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F658N 1 900 S POS TARG 2.86342, -SPIRAL S 5.83028; PAR 6 WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F660N 1 782 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ M31-NUCLEAR-SPIRAL 1 WFC3/UVI ACCUM UVIS-FIX F658N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 2 ACS/WFC ACCUM WFC-FIX F660N none none none none 1 N/A M31-NUCLEAR-SPIRAL 3 WFC3/UVI ACCUM UVIS-FIX F658N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 4 ACS/WFC ACCUM WFC-FIX F660N none none none none 1 N/A M31-NUCLEAR-SPIRAL 5 WFC3/UVI ACCUM UVIS-FIX F658N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 6 ACS/WFC ACCUM WFC-FIX F660N none none none none 1 N/A 12174( 3) - 01-Oct-2010 12:15:55 - [ 7] Visit: 04 Visit Requirements: SAME ORIENT AS 01 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 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F502N 1 900 S PAR 2 WITH 1 -SPIRAL S ------------------------------------------------------------------------------------------------------------------------------------ 2 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F660N 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 3 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F502N 1 900 S POS TARG 1.43171, -SPIRAL S 2.91514; PAR 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F660N 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 5 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F502N 1 900 S POS TARG 2.86342, -SPIRAL S 5.83028; PAR 6 WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F660N 1 782 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ M31-NUCLEAR-SPIRAL 1 WFC3/UVI ACCUM UVIS-FIX F502N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 2 ACS/WFC ACCUM WFC-FIX F660N none none none none 1 N/A M31-NUCLEAR-SPIRAL 3 WFC3/UVI ACCUM UVIS-FIX F502N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 4 ACS/WFC ACCUM WFC-FIX F660N none none none none 1 N/A M31-NUCLEAR-SPIRAL 5 WFC3/UVI ACCUM UVIS-FIX F502N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 6 ACS/WFC ACCUM WFC-FIX F660N none none none none 1 N/A 12174( 3) - 01-Oct-2010 12:15:55 - [ 8] Visit: 05 Visit Requirements: SAME ORIENT AS 01 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 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F502N 1 900 S PAR 2 WITH 1 -SPIRAL S ------------------------------------------------------------------------------------------------------------------------------------ 2 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F658N 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 3 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F502N 1 900 S POS TARG 1.43171, -SPIRAL S 2.91514; PAR 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F658N 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 5 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F502N 1 900 S POS TARG 2.86342, -SPIRAL S 5.83028; PAR 6 WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F658N 1 782 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ M31-NUCLEAR-SPIRAL 1 WFC3/UVI ACCUM UVIS-FIX F502N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 2 ACS/WFC ACCUM WFC-FIX F658N none none none none 1 N/A M31-NUCLEAR-SPIRAL 3 WFC3/UVI ACCUM UVIS-FIX F502N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 4 ACS/WFC ACCUM WFC-FIX F658N none none none none 1 N/A M31-NUCLEAR-SPIRAL 5 WFC3/UVI ACCUM UVIS-FIX F502N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 6 ACS/WFC ACCUM WFC-FIX F658N none none none none 1 N/A 12174( 3) - 01-Oct-2010 12:15:55 - [ 9] Visit: 06 Visit Requirements: SAME ORIENT AS 01 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 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F390M 1 900 S PAR 2 WITH 1 -SPIRAL S ------------------------------------------------------------------------------------------------------------------------------------ 2 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F658N 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 3 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F390M 1 900 S POS TARG 1.43171, -SPIRAL S 2.91514; PAR 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F658N 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 5 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F390M 1 900 S POS TARG 2.86342, -SPIRAL S 5.83028; PAR 6 WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F658N 1 782 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ M31-NUCLEAR-SPIRAL 1 WFC3/UVI ACCUM UVIS-FIX F390M none none none none 1 N/A S M31-NUCLEAR-SPIRAL 2 ACS/WFC ACCUM WFC-FIX F658N none none none none 1 N/A M31-NUCLEAR-SPIRAL 3 WFC3/UVI ACCUM UVIS-FIX F390M none none none none 1 N/A S M31-NUCLEAR-SPIRAL 4 ACS/WFC ACCUM WFC-FIX F658N none none none none 1 N/A M31-NUCLEAR-SPIRAL 5 WFC3/UVI ACCUM UVIS-FIX F390M none none none none 1 N/A S M31-NUCLEAR-SPIRAL 6 ACS/WFC ACCUM WFC-FIX F658N none none none none 1 N/A 12174( 3) - 01-Oct-2010 12:15:55 - [ 10] Visit: 07 Visit Requirements: SAME ORIENT AS 01 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 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F547M 1 900 S PAR 2 WITH 1 -SPIRAL S ------------------------------------------------------------------------------------------------------------------------------------ 2 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F550M 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 3 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F547M 1 900 S POS TARG 1.43171, -SPIRAL S 2.91514; PAR 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F550M 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 5 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F547M 1 900 S POS TARG 2.86342, -SPIRAL S 5.83028; PAR 6 WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F550M 1 782 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ M31-NUCLEAR-SPIRAL 1 WFC3/UVI ACCUM UVIS-FIX F547M none none none none 1 N/A S M31-NUCLEAR-SPIRAL 2 ACS/WFC ACCUM WFC-FIX F550M none none none none 1 N/A M31-NUCLEAR-SPIRAL 3 WFC3/UVI ACCUM UVIS-FIX F547M none none none none 1 N/A S M31-NUCLEAR-SPIRAL 4 ACS/WFC ACCUM WFC-FIX F550M none none none none 1 N/A M31-NUCLEAR-SPIRAL 5 WFC3/UVI ACCUM UVIS-FIX F547M none none none none 1 N/A S M31-NUCLEAR-SPIRAL 6 ACS/WFC ACCUM WFC-FIX F550M none none none none 1 N/A 12174( 3) - 01-Oct-2010 12:15:55 - [ 11] Visit: 08 Visit Requirements: SAME ORIENT AS 01 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 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F665N 1 900 S PAR 2 WITH 1 -SPIRAL S ------------------------------------------------------------------------------------------------------------------------------------ 2 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F625W 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 3 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F665N 1 900 S POS TARG 1.43171, -SPIRAL S 2.91514; PAR 4 WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F625W 1 800 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 5 M31-NUCLEAR WFC3/UVI ACCUM UVIS-FIX F665N 1 900 S POS TARG 2.86342, -SPIRAL S 5.83028; PAR 6 WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 M31-NUCLEAR ACS/WFC ACCUM WFC-FIX F625W 1 782 S -SPIRAL ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ M31-NUCLEAR-SPIRAL 1 WFC3/UVI ACCUM UVIS-FIX F665N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 2 ACS/WFC ACCUM WFC-FIX F625W none none none none 1 N/A M31-NUCLEAR-SPIRAL 3 WFC3/UVI ACCUM UVIS-FIX F665N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 4 ACS/WFC ACCUM WFC-FIX F625W none none none none 1 N/A M31-NUCLEAR-SPIRAL 5 WFC3/UVI ACCUM UVIS-FIX F665N none none none none 1 N/A S M31-NUCLEAR-SPIRAL 6 ACS/WFC ACCUM WFC-FIX F625W none none none none 1 N/A 12174( 3) - 01-Oct-2010 12:15:55 - [ 12] Summary Form for Proposal 12174 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS-FIX, WFC-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 85D TO 85 D, PAR 2 WITH 1, PAR 4 WITH 3, PAR 6 WITH 5, POS TARG 1.43171, 2.91514, POS TARG 2.86342, 5.83028, SAME ORIENT AS 01 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F373N, F390M, F502N, F547M, F550M, F625W, F656N, F658N, F660N, F665N ------------------------------------------------------------------------------------------------------------------------------------ Target Names M31-NUCLEAR-SPIRAL ------------------------------------------------------------------------------------------------------------------------------------