Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 3458c Report Date: 09-May-96:18:38 Version: ********** Check-in Date: ********** 1.Proposal Title: STELLAR POPULATION GRADIENTS IN POST-CORE-COLLAPSE GLOBULAR CLUSTERS ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID STELLAR POPULATIONS GO Sub Category GLOBULAR CLUSTERS ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Stanislav G Djorgovski CALIFORNIA INSTITUTE OF TECH USA 818-356-4415 ------------------------------------------------------------------------------------ 7. Abstract The nature of color and population gradients in globular clusters is one of the major outstanding puzzles in modern globular cluster reseach. Clusters with central cusps (collapsed cores) become bluer towards their centers, while no clear gradients are seen in clusters with King-model morphology. The effect involves at least a few percent of the total visible light. The color gradients seem to be caused by the demise of red giants and/or subgiants, and possibly an increased number of faint blue objects. These effects represent a strong evidence that dynamical evolution of star clusters can physically modify their stellar populations. These phenomena are not yet understood, but a population of centrally concentrated binaries is most likely responsible for them. The underlying physical cause of these effects may be also related to the origin of millisecond pulsars and low mass x-ray binaries in globular clusters. Star counts in the UV near the centers of highly concentrated clusters with the HST can probe the regions where the gradients should be the strongest and which are very difficult to study from the ground. In addition to extending the counts of HB and RGB stars into the central regions we expect to find a new population of faint blue objects near the centers of these clusters, for which tantalizing hints have been seen in the best-seeing ground-based data, and in the UV colors measured by the IUE and ANS satellites. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 99.99 par: 0 10. Num targs pri: 9 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: WF/PC ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 3458c PI: Stanislav G Djorgovski Proposal Title: STELLAR POPULATION GRADIENTS IN POST-CORE-COLLAPSE GLOBULAR CLUSTERS ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Pi Stanislav G Djorgovski CALIFORNIA INSTITUTE OF USA TECHNOLOGY Ivan R King UNIV. OF CALIFORNIA BERKELEY USA Giampaolo Piotto UNIVERSITA DI PADOVA ITALY X Georges Meylan SPACE TELESCOPE SCIENCE SWITZERLAND X INSTITUTE Nicholas Weir CALIFORNIA INSTITUTE OF USA TECHNOLOGY Sterl E Phinney CALIFORNIA INSTITUTE OF USA TECHNOLOGY David F Chernoff CORNELL UNIVERSITY USA ------------------------------------------------------------------------------------ 2. Scientific Justification. ------------------------------------------------------------------------------------ 3. Description of proposed observations. Our proposed sample contains 9 Galactic globular clusters: NGC 4147, 6093, 6284, 6541, 6652, 6681, 6717, and 7099. Most of them have a definitive or probable PCC morphology, and all are highly concentrated. Previous space UV data (IUE or ANS) exist for 6 of them, and all are classified as being "blue" or "extremely blue" in their FUV colors. Our proposed observing strategy is rather simple: for each target cluster, obtain images with the PC and F336W and F439W filters (roughly U and B), as follows: F336W: 300 sec + 2 x 900 sec + 1200 sec = 3300 sec total; F439W: 100 sec + 300 sec + 400 sec = 800 sec total. Total integration time per cluster = 4100 sec = 1.14 h These exposure times are based on the M15 study by Lauer et al. (for F336W), and scaling from the WFPC Handbook for the F439W exposures. Lauer et al. just reached the turnoff in an about equal integration. Most of our targets are a bit closer, and have comparable foreground extinction. The multiplicity of exposures serves to increase the S/N, and to provide the cosmic ray redundancy. The shortest exposures are a safeguard against saturation of the brightest stars; the remaining exposure times are our estimates of the longest exposures which would avoid saturating too many of the brightest stars. Saturation of the few brightest stars is not critical for this project: we wish to measure fainter blue objects, and mere counting of the bright giants is sufficient. NOTE: We would like to have the SAME ORIENT ( with small POS TARG offsets ) within a given cluster, if possible ( however, we will drop any restrictions which would postpone our observations for more than a couple of months Page 3 ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. The essential point of this proposal is the ability to resolve stars in very crowded central regions of highly concentrated globular clusters, and to do it in the UV. This is where the gradients should be the strongest. The sharp core of the HST PSF makes that task possible. The seeing even in the best ground-based observations in the V or R bands is practically never better than about 0.5 - 0.6 arcsec FWHM, and even that is rare; in the U band, the situation is a little worse. The superiority of the HST images of globular clusters has been already abundantly demonstrated. The feasibility of this project can be illustrated by the discoveries of numerous blue stragglers in 47 Tucanae (a highly concentrated cluster, not unlike some of our targets), the study of M15 by Lauer et al. 1991, etc. We are actively pursuing a program of ground-based multicolor observations of color and population gradients, from ESO, Palomar, and other observatories. Some of our data are as good as they can be, in terms of the seeing, etc.; we are simply getting the data on more clusters, but cannot get any better angular resolution. We are also starting a program of spectroscopy of selected blue stars in some of our clusters, and several other, subsidiary studies. Good ground-based multicolor CCD images are already in hand for all of our target clusters, and will be used to supplement the HST data, by providing the information from larger radii, where the crowding effects are less severe. We have analysed archival data obtained with the IUE and ANS satellites. Interesting UV color effects have been found, but even the best IUE data provide only hints that some UV gradients exist. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. Our team has combined expertise in dealing with the HST data (King, Meylan, Djorgovski, and Weir), image processing and deconvolutions (Weir, Djorgovski, and King), stellar photometry in crowded fields, using versions of both Daophot and Romafot, (Piotto, King, Djorgovski, and Weir), photometry of globular clusters (King, Djorgovski, Piotto, and Meylan), theoretical interpretation and modeling (Phinney and Chernoff), and globular cluster dynamics (King, Meylan, Chernoff, and Phinney). We plan to process and analyse the data primarly at Caltech (Djorgovski and Weir), and also at Berkeley (King), Padova (Piotto), and STScI (Meylan). Theoretical modeling and analysis will be done largely at Caltech (Phinney) and at Cornell (Chernoff). We already have an extensive set of software for the task, although more software may need to be written for the specific problems. Especially noteworthy is Weir's Maximum Entropy package for deconvolutions of the HST images. Considerable computing hardware already exists at all of our institutions, and we anticipate acquiring a dedicated workstation at Caltech, which would make the data processing faster and more cost-effective. To measure the images, we plan to use different HST-PSF-optimized versions of both Daophot and Romafot. We will also try to use the image deconvolutions to provide initial star lists for subsequent processing by a standard PSF fitting package, such as Daophot or Romafot. Our main technique for restoring the images is a Bayesian Maximum Entropy based approach using a two-dimensional direct image deconvolution driver for the commercial (Gull and Skilling) package MemSys5. This system has been applied successfully on the actual HST data. ------------------------------------------------------------------------------------ 8. Additional comments or special requests. Page 4 ------------------------------------------------------------------------------------ 9. Description of previous HST work. King is a GTO on the FOC team, and is actively involved in several HST projects. Meylan is an instrument scientist on the FOC team, and is also actively involved in several HST projects, as well as in an extensive instrument and science support. Both King and Meylan are coauthors on several HST-based papers now in press. Djorgovski is a P.I. on two Cycle 1 GO programs, and a Co-I on another GO proposal. The data have been received and are now being analysed. Other Co-I's on this team are also involved in different HST projects. Several of us (King, Weir, and Djorgovski) authored or coauthored several papers dealing with the image processing and deconvolution of HST data. None of these projects relates directly to this proposal. ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). We already have an extensive set of software for the task, although more software may need to be written for the specific problems. Especially noteworthy is Weir's Maximum Entropy package for deconvolutions of the HST images. Considerable computing hardware already exists at all of our institutions, and we anticipate acquiring a devoted workstation at Caltech, which would make the data processing faster and more cost-effective. There are adequate research facilities (libraries, etc.) at our institutions. At least two Caltech graduate students will be involved in this project. ------------------------------------------------------------------------------------ 11. Address Information Name: STANISLAV G DJORGOVSKI Category: PI Institution: CALIFORNIA INSTITUTE OF TECHNOLOG Address: ASTRONOMY, MAILSTOP 105-24 CALIFORNIA INSTITUTE OF TECHNOLOGY City: PASADENA State: CA Zip Code: 91125 Country: USA Telephone: (818)356-4415 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 3458c [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 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 NGC4147 C,201 RA = 12H 10M 06.20S +/- J2000 1 V=10.3 0.15S, DEC = +18D 32' 30.0" +/- 1.0" Comments: GLOBULAR CLUSTER CENTRAL CUSP. TOTAL V MAG GIVEN AS FLUXVAL. IN F336W, TAKE ONE 300S EXPOSURE, ONE 900S, AND ONE 1200S. IN F439W, TAKE ONE 100S EXPOSURE, ONE 300S, AND ONE 400S. ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC6093 C,201 RA = 16H 17M 02.50S +/- J2000 1 V=7.4 0.15S, DEC = -22D 58' 30.0" +/- 1.0" Comments: GLOBULAR CLUSTER CENTRAL CUSP. TOTAL V MAG GIVEN AS FLUXVAL. IN F336W, TAKE ONE 300S EXPOSURE, ONE 900S, AND ONE 1200S. IN F439W, TAKE ONE 100S EXPOSURE, ONE 300S, AND ONE 400S. ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC6284 C,201 RA = 17H 04M 28.80S +/- J2000 1 V=8.9 0.15S, DEC = -24D 45' 53.0" +/- 1.0" Comments: GLOBULAR CLUSTER CENTRAL CUSP. TOTAL V MAG GIVEN AS FLUXVAL. IN F336W, TAKE ONE 300S EXPOSURE, TWO 900S, AND ONE 1200S. IN F439W, TAKE ONE 100S EXPOSURE, ONE 300S, AND ONE 400S. ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC6541 C,201 RA = 18H 08M 02.20S +/- J2000 1 V=6.7 0.15S, DEC = -43D 42' 19.0" +/- 1.0" Comments: GLOBULAR CLUSTER CENTRAL CUSP. TOTAL V MAG GIVEN AS FLUXVAL. IN F336W, TAKE ONE 300S EXPOSURE, ONE 900S, AND ONE 1200S. IN F439W, TAKE ONE 100S EXPOSURE, ONE 300S, AND ONE 400S. ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC6652 C,201 RA = 18H 35M 45.70S +/- J2000 1 V=8.5 0.15S, DEC = -32D 59' 25.0" +/- 1.0" Comments: GLOBULAR CLUSTER CENTRAL CUSP. TOTAL V MAG GIVEN AS FLUXVAL. IN F336W, TAKE ONE 300S EXPOSURE, ONE 900S, AND ONE 1200S. IN F439W, TAKE ONE 100S EXPOSURE, ONE 300S, AND ONE 400S. ------------------------------------------------------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 3458c [ 6] ------------------------------------------------------------------------------------------------------------------------------------ 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| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC6681 C,201 RA = 18H 43M 12.60S +/- J2000 1 V=7.9 0.15S, DEC = -32D 17' 30.0" +/- 1.0" Comments: GLOBULAR CLUSTER CENTRAL CUSP. TOTAL V MAG GIVEN AS FLUXVAL. IN F336W, TAKE ONE 300S EXPOSURE, TWO 900S, AND ONE 1200S. IN F439W, TAKE ONE 100S EXPOSURE, ONE 300S, AND ONE 400S. ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC6717 C,201 RA = 18H 55M 06.20S +/- J2000 1 V=9.0 0.15S, DEC = -22D 42' 02.0" +/- 1.0" Comments: GLOBULAR CLUSTER CENTRAL CUSP. TOTAL V MAG GIVEN AS FLUXVAL. IN F336W, TAKE ONE 300S EXPOSURE, ONE 900S, AND ONE 1200S. IN F439W, TAKE ONE 100S EXPOSURE, ONE 300S, AND ONE 400S. ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC7099 C,201 RA = 21H 40M 22.00S +/- J2000 1 V=7.5 0.15S, DEC = -23D 10' 44.0" +/- 1.0" Comments: GLOBULAR CLUSTER CENTRAL CUSP. TOTAL V MAG GIVEN AS FLUXVAL. IN F336W, TAKE ONE 300S EXPOSURE, TWO 900S, AND ONE 1200S. IN F439W, TAKE ONE 100S EXPOSURE, ONE 300S, AND ONE 400S. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 3458c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 1.1 NGC4147 PC IMAGE PCALL F336W CR-SPLIT=NO 1 300S 1 1 CYCLE 2 / 1.1-8.6 GROUP 1.1-1.6 WITHIN 7D SAME ORIENT FOR 1.2-1.6 AS 1.1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 1.2 NGC4147 PC IMAGE PCALL F336W CR-SPLIT=NO 1 900S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 1.3 NGC4147 PC IMAGE PCALL F336W CR-SPLIT=NO 1 1200S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ 1.4 NGC4147 PC IMAGE PCALL F439W CR-SPLIT=NO 1 100S 1 1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 1.5 NGC4147 PC IMAGE PCALL F439W CR-SPLIT=NO 1 300S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 1.6 NGC4147 PC IMAGE PCALL F439W CR-SPLIT=NO 1 400S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ 2.1 NGC6093 PC IMAGE PCALL F336W CR-SPLIT=NO 1 300S 1 1 GROUP 2.1-2.6 WITHIN 7D SAME ORIENT FOR 2.2-2.6 AS 2.1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 2.2 NGC6093 PC IMAGE PCALL F336W CR-SPLIT=NO 1 900S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 2.3 NGC6093 PC IMAGE PCALL F336W CR-SPLIT=NO 1 1200S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ 2.4 NGC6093 PC IMAGE PCALL F439W CR-SPLIT=NO 1 100S 1 1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 2.5 NGC6093 PC IMAGE PCALL F439W CR-SPLIT=NO 1 300S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 2.6 NGC6093 PC IMAGE PCALL F439W CR-SPLIT=NO 1 400S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 3458c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 3.1 NGC6284 PC IMAGE PCALL F336W CR-SPLIT=NO 1 300S 1 1 GROUP 3.1-3.6 WITHIN 7D SAME ORIENT FOR 3.2-3.6 AS 3.1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 3.2 NGC6284 PC IMAGE PCALL F336W CR-SPLIT=NO 2 900S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 3.3 NGC6284 PC IMAGE PCALL F336W CR-SPLIT=NO 1 1200S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ 3.4 NGC6284 PC IMAGE PCALL F439W CR-SPLIT=NO 1 100S 1 1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 3.5 NGC6284 PC IMAGE PCALL F439W CR-SPLIT=NO 1 300S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 3.6 NGC6284 PC IMAGE PCALL F439W CR-SPLIT=NO 1 400S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ 4.1 NGC6541 PC IMAGE PCALL F336W CR-SPLIT=NO 1 300S 1 1 GROUP 4.1-4.6 WITHIN 7D SAME ORIENT FOR 4.2-4.6 AS 4.1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 4.2 NGC6541 PC IMAGE PCALL F336W CR-SPLIT=NO 1 900S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 4.3 NGC6541 PC IMAGE PCALL F336W CR-SPLIT=NO 1 1200S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ 4.4 NGC6541 PC IMAGE PCALL F439W CR-SPLIT=NO 1 100S 1 1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 4.5 NGC6541 PC IMAGE PCALL F439W CR-SPLIT=NO 1 300S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 4.6 NGC6541 PC IMAGE PCALL F439W CR-SPLIT=NO 1 400S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 3458c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 5.1 NGC6652 PC IMAGE PCALL F336W CR-SPLIT=NO 1 300S 1 1 GROUP 5.1-5.6 WITHIN 7D SAME ORIENT FOR 5.2-5.6 AS 5.1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 5.2 NGC6652 PC IMAGE PCALL F336W CR-SPLIT=NO 1 900S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 5.3 NGC6652 PC IMAGE PCALL F336W CR-SPLIT=NO 1 1200S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ 5.4 NGC6652 PC IMAGE PCALL F439W CR-SPLIT=NO 1 100S 1 1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 5.5 NGC6652 PC IMAGE PCALL F439W CR-SPLIT=NO 1 300S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 5.6 NGC6652 PC IMAGE PCALL F439W CR-SPLIT=NO 1 400S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ 6.1 NGC6681 PC IMAGE PCALL F336W CR-SPLIT=NO 1 300S 1 1 GROUP 6.1-6.6 WITHIN 7D SAME ORIENT FOR 6.2-6.6 AS 6.1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 6.2 NGC6681 PC IMAGE PCALL F336W CR-SPLIT=NO 2 900S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 6.3 NGC6681 PC IMAGE PCALL F336W CR-SPLIT=NO 1 1200S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ 6.4 NGC6681 PC IMAGE PCALL F439W CR-SPLIT=NO 1 100S 1 1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 6.5 NGC6681 PC IMAGE PCALL F439W CR-SPLIT=NO 1 300S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 6.6 NGC6681 PC IMAGE PCALL F439W CR-SPLIT=NO 1 400S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 3458c [ 10] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 7.1 NGC6717 PC IMAGE PCALL F336W CR-SPLIT=NO 1 300S 1 1 GROUP 7.1-7.6 WITHIN 7D SAME ORIENT FOR 7.2-7.6 AS 7.1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 7.2 NGC6717 PC IMAGE PCALL F336W CR-SPLIT=NO 1 900S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 7.3 NGC6717 PC IMAGE PCALL F336W CR-SPLIT=NO 1 1200S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ 7.4 NGC6717 PC IMAGE PCALL F439W CR-SPLIT=NO 1 100S 1 1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 7.5 NGC6717 PC IMAGE PCALL F439W CR-SPLIT=NO 1 300S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 7.6 NGC6717 PC IMAGE PCALL F439W CR-SPLIT=NO 1 400S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ 8.1 NGC7099 PC IMAGE PCALL F336W CR-SPLIT=NO 1 300S 1 1 GROUP 8.1-8.6 WITHIN 7D SAME ORIENT FOR 8.2-8.6 AS 8.1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 8.2 NGC7099 PC IMAGE PCALL F336W CR-SPLIT=NO 2 900S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 8.3 NGC7099 PC IMAGE PCALL F336W CR-SPLIT=NO 1 1200S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ 8.4 NGC7099 PC IMAGE PCALL F439W CR-SPLIT=NO 1 100S 1 1 POS TARG -1,-1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 8.5 NGC7099 PC IMAGE PCALL F439W CR-SPLIT=NO 1 300S 1 1 POS TARG +1,+1 Comments: SMALL POS TARG OFFSET TO OVERCOME CHIP DEFECTS, ETC. ------------------------------------------------------------------------------------------------------------------------------------ 8.6 NGC7099 PC IMAGE PCALL F439W CR-SPLIT=NO 1 400S 1 1 Comments: DEFAULT POS TARG POSITION. ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 3458c [ 11] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations PC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 99.99 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category STELLAR POPULATIONS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category GLOBULAR CLUSTERS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 2 / 1.1-8.6; GROUP 1.1-1.6 WITHIN 7D; SAME ORIENT FOR 1.2-1.6 AS 1.1; POS TARG -1,-1; POS TARG +1,+1; GROUP 2.1-2.6 WITHIN 7D; SAME ORIENT FOR 2.2-2.6 AS 2.1; GROUP 3.1-3.6 WITHIN 7D; SAME ORIENT FOR 3.2-3.6 AS 3.1; GROUP 4.1-4.6 WITHIN 7D; SAME ORIENT FOR 4.2-4.6 AS 4.1; GROUP 5.1-5.6 WITHIN 7D; SAME ORIENT FOR 5.2-5.6 AS 5.1; GROUP 6.1-6.6 WITHIN 7D; SAME ORIENT FOR 6.2-6.6 AS 6.1; GROUP 7.1-7.6 WITHIN 7D; SAME ORIENT FOR 7.2-7.6 AS 7.1; GROUP 8.1-8.6 WITHIN 7D; SAME ORIENT FOR 8.2-8.6 AS 8.1; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F336W F439W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC4147 NGC6093 NGC6284 NGC6541 NGC6652 NGC6681 NGC6717 NGC7099 ------------------------------------------------------------------------------------------------------------------------------------