Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5461 Report Date: 18-Jul-95:17:27 Version: ********** Check-in Date: ********** 1.Proposal Title: LOW-LUMINOSITY STARS IN GLOBULAR CLUSTERS: CYCLE 4 HIGH ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID COOL STARS GO Sub Category OLD CLUSTERS ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Harvey B. Richer 4618 CANADA 604-822-4134 ------------------------------------------------------------------------------------ 7. Abstract We will use the unique imaging capabilities of the refurbished HST and the WFPC2 to determine mass and luminosity functions for the lowest-luminosity stars in one of the nearest Galactic globular clusters, M4. Our deep U, V, and I images will allow us to probe two low-luminosity populations: the low-mass main-sequence stars, and the white dwarfs. Understanding the contribution that these stars make to the overall mass budget of globular clusters will provide new understanding of dynamical evolution, star formation in the early universe, the dark-matter content of the halo of our Galaxy, and the evolution of white dwarfs. Our color-magnitude diagrams will yield for the first time cooling sequences for hot white dwarfs in globular clusters, direct observations of the binary populations in the cluster cores, and the turndown of the Population II main sequence where the ZAMS merges with the Hayashi track for convective stars. Major support programs being carried out by our team members in association with this proposal include theoretical modeling of the evolution of low-mass stars, model atmospheres and the transformation of the theoretical spectra of these stars to HST colors, and the development of photometric algorithms optimized for HST data. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 28.40 par: 0 10. Num targs pri: 3 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: WF/PC ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5461 PI: Harvey B. Richer Proposal Title: LOW-LUMINOSITY STARS IN GLOBULAR CLUSTERS: CYCLE 4 HIGH ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Harvey B. Richer 4618 CANADA Roger A. Bell 2620 USA Michael Bolte 1552 USA Howard E. Bond 3470 USA Gregory G. Fahlman 4618 CANADA William E. Harris 4642 CANADA James E. Hesser 4628 CANADA Robert D. Mcclure 4628 CANADA Carlton P. Pryor 3260 USA Peter B. Stetson 4628 CANADA Don A. Vandenberg 4670 CANADA ------------------------------------------------------------------------------------ 3. Description of proposed observations. We will use the planetary chip of the WFPC2 to obtain deep images of 3 fields within the nearby globular cluster M4: one in the cluster core, one at 1 core radius, and one at 4 core radii. The aim of the program is to detect and study two populations of very low-luminosity stars: the faint red main-sequence stars, and the faint blue white dwarfs. We will obtain U, V, and I exposures in the inner 2 fields, and V,I exposures in the outer field. The planned exposures are (for the 2 inner fields) 15 x 1000 sec in V, 8 x 700 sec in I, and 8 x 1400 sec in U; and (for the outer field) 15 x 2100 sec in V and 9 x 800 sec in I. We do not plan on U in the outer field as the white dwarf content should be small. We estimate there will be about 20 WD's in each inner field. Since we are obtaining multiple exposures, we will NOT CR-SPLIT each individual exposure. We will shift the telescope pointing about 1 to 1.5 pixels between exposures for a better sampling of the PSF. We are aiming to achieve photometry with precision better than 0.1 mag in each color at V = 26.5. The spacecraft roll angle is arbitrary, but all exposures on a given field should be taken at the SAME roll angle. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. (See Phase I proposal.) ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. None. ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. None. ------------------------------------------------------------------------------------ 8. Additional comments or special requests. None. ------------------------------------------------------------------------------------ 9. Description of previous HST work. (See Phase I proposal.) ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). (See Phase I proposal.) ------------------------------------------------------------------------------------ 11. Address Information Page 3 Name: HARVEY B. RICHER Category: PI Institution: 4618 Address: DEPT. OF GEOPHYSICS AND ASTRONOMY UNIVERSITY OF BRITISH COLUMBIA 129-2219 MAIN MALL City: VANCOUVER State: BC Zip Code: V6T 1Z4 Country: CANADA Telephone: 604-822-4134 Telex (or e-mail): richer@astro.ubc.ca ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 5461 [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial |Acqui|FLX| Flux data No | Name | Description | Position |Eqnx | Vel. |Prblm|REF| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 1 M4-CORE C,201,A,119,120,136,141 RA = 16H 23M 37.76S +/- 1", J2000 1 V=26.5 NGC6121 DEC = -26D 31' 26.7" +/- 1", PLATE-ID=02J6 Comments: CORE OF GLOBULAR CLUSTER M4 ------------------------------------------------------------------------------------------------------------------------------------ 2 M4-1-CORE- C,201,A,119,120,136,141 RA = 16H 23M 40.54S +/- 1", J2000 1 V=26.5 RADIUS DEC = -26D 30' 45.4" +/- 1", NGC6121 PLATE-ID=02J6 Comments: 1 CORE RADIUS FROM CENTER OF GLOBULAR CLUSTER M4 ------------------------------------------------------------------------------------------------------------------------------------ 3 M4-4-CORE- C,201,A,119,120,136,141 RA = 16H 23M 54.60S +/- 1", J2000 1 V=26.5 RADII DEC = -26D 32' 24.3" +/- 1", NGC6121 PLATE-ID=02J6 Comments: 4 CORE RADII FROM CENTER OF GLOBULAR CLUSTER M4 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5461 [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 DEFINE # WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 60S 1 1 CYCLE 4 / 1-8.1 16- CLOCKS=NO PCS MODE F / 1-8.1 POSNS ATD-GAIN=7 SAME ORIENT FOR 1.1-8.1 AS 1 POS TARG 0., 0. Comments: THIS SEQUENCE TAKES 8 EXPOSURES EACH IN U AND I, SPACED AROUND AN OCTAGONAL PATH WITH 1.5- PIXEL STEPS BETWEEN EXPOSURES. ------------------------------------------------------------------------------------------------------------------------------------ 1.1 DEFINE # WFPC2 IMAGE PC1-FIX F336W CR-SPLIT=NO 1 130S 1 1 POS TARG 0., 0. 16- CLOCKS=NO POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 2 DEFINE # WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 70S 1 1 POS TARG 0.069, 0. 16- CLOCKS=NO POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 2.1 DEFINE # WFPC2 IMAGE PC1-FIX F336W CR-SPLIT=NO 1 150S 1 1 POS TARG 0.069, 0. 16- CLOCKS=NO POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 3 DEFINE # WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 70S 1 1 POS TARG 0.138, 16- CLOCKS=NO 0.069 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 3.1 DEFINE # WFPC2 IMAGE PC1-FIX F336W CR-SPLIT=NO 1 150S 1 1 POS TARG 0.138, 16- CLOCKS=NO 0.069 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 4 DEFINE # WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 70S 1 1 POS TARG 0.138, 16- CLOCKS=NO 0.138 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 4.1 DEFINE # WFPC2 IMAGE PC1-FIX F336W CR-SPLIT=NO 1 150S 1 1 POS TARG 0.138, 16- CLOCKS=NO 0.138 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 5 DEFINE # WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 70S 1 1 POS TARG 0.069, 16- CLOCKS=NO 0.207 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 5.1 DEFINE # WFPC2 IMAGE PC1-FIX F336W CR-SPLIT=NO 1 150S 1 1 POS TARG 0.069, 16- CLOCKS=NO 0.207 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 6 DEFINE # WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 70S 1 1 POS TARG 0.0, 16- CLOCKS=NO 0.207 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5461 [ 6] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 6.1 DEFINE # WFPC2 IMAGE PC1-FIX F336W CR-SPLIT=NO 1 150S 1 1 POS TARG 0.0, 16- CLOCKS=NO 0.207 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7 DEFINE # WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 70S 1 1 POS TARG -0.069, 16- CLOCKS=NO 0.138 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 7.1 DEFINE # WFPC2 IMAGE PC1-FIX F336W CR-SPLIT=NO 1 150S 1 1 POS TARG -0.069, 16- CLOCKS=NO 0.138 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 8 DEFINE # WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 70S 1 1 POS TARG -0.069, 16- CLOCKS=NO 0.069 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 8.1 DEFINE # WFPC2 IMAGE PC1-FIX F336W CR-SPLIT=NO 1 150S 1 1 POS TARG -0.069, 16- CLOCKS=NO 0.069 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 11 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 CYCLE 4 / 11-18 8-POSNS CLOCKS=NO PCS MODE F / 11-18 ATD-GAIN=7 SAME ORIENT FOR 12 -18 AS 11 POS TARG 0., 0. Comments: THIS SEQUENCE TAKES 8 EXPOSURES SPACED AROUND AN OCTAGONAL PATH WITH 1.5-PIXEL STEPS BETWEEN EXPOSURES. ------------------------------------------------------------------------------------------------------------------------------------ 12 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG 0.069, 0. 8-POSNS CLOCKS=NO ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 13 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG 0.138, 8-POSNS CLOCKS=NO 0.069 ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 14 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG 0.138, 8-POSNS CLOCKS=NO 0.138 ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 15 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG 0.069, 8-POSNS CLOCKS=NO 0.207 ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 16 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG 0.0, 8-POSNS CLOCKS=NO 0.207 ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5461 [ 7] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 17 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG -0.069, 8-POSNS CLOCKS=NO 0.138 ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 18 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG -0.069, 8-POSNS CLOCKS=NO 0.069 ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 21 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 CYCLE 4 / 21-35 15- CLOCKS=NO PCS MODE F / 21-35 POSNS ATD-GAIN=7 SAME ORIENT FOR 22 -35 AS 21 POS TARG 0., 0. Comments: THIS SEQUENCE TAKES 15 EXPOSURES SPACED AROUND A POLYGONAL PATH WITH 1-PIXEL STEPS BETWEEN EXPOSURES. ------------------------------------------------------------------------------------------------------------------------------------ 22 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG 0.045, 0. 15- CLOCKS=NO POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 23 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG 0.090, 15- CLOCKS=NO 0.045 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 24 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG 0.138, 15- CLOCKS=NO 0.090 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 25 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG 0.183, 15- CLOCKS=NO 0.138 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 26 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG 0.183, 15- CLOCKS=NO 0.183 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 27 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG 0.138, 15- CLOCKS=NO 0.228 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 28 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG 0.090, 15- CLOCKS=NO 0.276 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 29 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG 0.045, 15- CLOCKS=NO 0.321 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5461 [ 8] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 30 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG 0., 0.321 15- CLOCKS=NO POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 31 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG -0.045, 15- CLOCKS=NO 0.276 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 32 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG -0.090, 15- CLOCKS=NO 0.228 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 33 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG -0.138, 15- CLOCKS=NO 0.183 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 34 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG -0.138, 15- CLOCKS=NO 0.138 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 35 DEFINE # WFPC2 IMAGE PC1-FIX # CR-SPLIT=NO 1 100S 1 1 POS TARG -0.090, 15- CLOCKS=NO 0.090 POSNS ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 41 USE 16- M4-CORE X10 SAME ORIENT FOR 42 POSNS AS 41 Comments: SEQUENCE OF 8 X 1500 SEC U FRAMES AND 8 X 700 SEC I FRAMES ------------------------------------------------------------------------------------------------------------------------------------ 42 USE 15- M4-CORE F555W X10 POSNS Comments: SEQUENCE OF 15 X 1000 SEC V FRAMES ------------------------------------------------------------------------------------------------------------------------------------ 51 USE 16- M4-1-CORE- X10 SAME ORIENT FOR 52 POSNS RADIUS AS 51 Comments: SEQUENCE OF 8 X 1500 SEC U FRAMES AND 8 X 700 SEC I FRAMES ------------------------------------------------------------------------------------------------------------------------------------ 52 USE 15- M4-1-CORE- F555W X10 POSNS RADIUS Comments: SEQUENCE OF 15 X 1000 SEC V FRAMES ------------------------------------------------------------------------------------------------------------------------------------ 61 USE 15- M4-4-CORE- F555W X21 SAME ORIENT FOR 62 POSNS RADII AS 61 Comments: SEQUENCE OF 15 X 2100 SEC V FRAMES ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5461 [ 9] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 62 USE 8- M4-4-CORE- F814W X8 POSNS RADII Comments: SEQUENCE OF 8 X 800 SEC I FRAMES ------------------------------------------------------------------------------------------------------------------------------------ 63 M4-4-CORE- WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 800S 1 1 CYCLE 4 RADII CLOCKS=NO PCS MODE F ATD-GAIN=7 SAME ORIENT FOR 63 AS 61 POS TARG 0.036, 0.102 Comments: AN EXTRA I EXPOSURE TO USE UP THE REST OF THE TAC TIME ALLOCATION. ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5461 [ 10] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO CLOCKS=NO ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 28.40 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category COOL STARS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category OLD CLUSTERS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 4 / 1-8.1; PCS MODE F / 1-8.1; SAME ORIENT FOR 1.1-8.1 AS 1; POS TARG 0., 0. POS TARG 0.069, 0. POS TARG 0.138, 0.069 POS TARG 0.138, 0.138 POS TARG 0.069, 0.207 POS TARG 0.0, 0.207 POS TARG -0.069, 0.138 POS TARG -0.069, 0.069 CYCLE 4 / 11-18; PCS MODE F / 11-18; SAME ORIENT FOR 12-18 AS 11; CYCLE 4 / 21-35; PCS MODE F / 21-35; SAME ORIENT FOR 22-35 AS 21; POS TARG 0.045, 0. POS TARG 0.090, 0.045 POS TARG 0.138, 0.090 POS TARG 0.183, 0.138 POS TARG 0.183, 0.183 POS TARG 0.138, 0.228 POS TARG 0.090, 0.276 POS TARG 0.045, 0.321 POS TARG 0., 0.321 POS TARG -0.045, 0.276 POS TARG -0.090, 0.228 POS TARG -0.138, 0.183 POS TARG -0.138, 0.138 POS TARG -0.090, 0.090 SAME ORIENT FOR 42 AS 41 SAME ORIENT FOR 52 AS 51 SAME ORIENT FOR 62 AS 61 CYCLE 4; PCS MODE F; SAME ORIENT FOR 63 AS 61; POS TARG 0.036, 0.102 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F814W F336W # F555W ------------------------------------------------------------------------------------------------------------------------------------ Target Names M4-CORE NGC6121 M4-1-CORE-RADIUS M4-4-CORE-RADII ------------------------------------------------------------------------------------------------------------------------------------