9039( 3) - 04/09/01 11:52 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 9039 Version: 3 Check-in Date: 09-Apr-2001 11:51:31 1.Proposal Title: Getting to the Core of The Matter: The Inner Region of M15 ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 10 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Bernard McNamara New Mexico State University CoI: Dr. Thomas Harrison New Mexico State University N CoI: Mr. Robert Zavala New Mexico State University N ------------------------------------------------------------------------------------ 5. Abstract We propose to measure the velocity dispersion profile within 15 arcseconds of the core of M15 to determine whether the mass distribution in this region is best fit by the presence of a Black Hole or by a more extended distribution of mass. We will test three models of the core region, that is possesses (1) a massive Black Hole, (2) a more extended distribution of neutron stars, or (3) is in the process of core collapse. Our observational data will consist of PC WFPC22 images. Using prior images in the HST archive and newly obtained images, we will compute the core velocity dispersion using proper motions. The expected accuracy of these motions is entirely adequate to test the models mentioned above. ------------------------------------------------------------------------------------ Observations Description ------------------------ Astrometric measurements of the core of M15. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 9039( 3) - 04/09/01 11:52 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 M15 Stellar Cluster, RA=21H 29M 58.4S +/-0.05S, J2000 V = 12+/-0.1 Globular Cluster DEC=+12D 10' 00.6" +/-0.5", B-V = 1.0+/-0.1 PLATE-ID=02V2 Coordinate Source: GUIDE_STAR_CATALOG Comments: Core of the globular cluster M15 9039( 3) - 04/09/01 11:52 - [ 3] Visit: 01 Visit Priority: Visit Requirements: ORIENT 270.7D TO 270.9D 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 ------------------------------------------------------------------------------------------------------------------------------------ 1 M15 WFPC2 IMAGE PC1-FIX F555W 3 16 S SEQ 1-8 NON-INT;POS TARG 0.0110, 0.0110;MAX DUR 16s Comments: First position on M15 core. ------------------------------------------------------------------------------------------------------------------------------------ 2 M15 WFPC2 IMAGE PC1-FIX F439W 1 40 S SAME POS AS 1;MAX DUR 40s Comments: First position on M15 core. ------------------------------------------------------------------------------------------------------------------------------------ 3 M15 WFPC2 IMAGE PC1-FIX F555W 3 16 S POS TARG 0.0,-0.0225;MAX DUR 16s Comments: Second position on M15 core. ------------------------------------------------------------------------------------------------------------------------------------ 4 M15 WFPC2 IMAGE PC1-FIX F439W 1 40 S SAME POS AS 3;MAX DUR 40s Comments: Second position on M15 core. ------------------------------------------------------------------------------------------------------------------------------------ 5 M15 WFPC2 IMAGE PC1-FIX F555W 3 16 S POS TARG -0.0225, 0.0;MAX DUR 16s Comments: Third position on M15 core. ------------------------------------------------------------------------------------------------------------------------------------ 6 M15 WFPC2 IMAGE PC1-FIX F439W 1 40 S SAME POS AS 5;MAX DUR 40s Comments: Third position on M15 core. ------------------------------------------------------------------------------------------------------------------------------------ 7 M15 WFPC2 IMAGE PC1-FIX F555W 3 16 S POS TARG 0.0, 0.0225;MAX DUR 16s Comments: Fourth position on M15 core. ------------------------------------------------------------------------------------------------------------------------------------ 8 M15 WFPC2 IMAGE PC1-FIX F439W 1 40 S SAME POS AS 7;MAX DUR 40s Comments: Fourth position on M15 core. ------------------------------------------------------------------------------------------------------------------------------------ 9039( 3) - 04/09/01 11:52 - [ 4] Summary Form for Proposal 9039 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PC1-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 270.7D TO 270.9D SEQ 1-8 NON-INT;POS TARG 0.0110, 0.0110;MAX DUR 16s SAME POS AS 1;MAX DUR 40s POS TARG 0.0,-0.0225;MAX DUR 16s SAME POS AS 3;MAX DUR 40s POS TARG -0.0225, 0.0;MAX DUR 16s SAME POS AS 5;MAX DUR 40s POS TARG 0.0, 0.0225;MAX DUR 16s SAME POS AS 7;MAX DUR 40s ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F555W F439W ------------------------------------------------------------------------------------------------------------------------------------ Target Names M15 ------------------------------------------------------------------------------------------------------------------------------------