6805( 9) - 08/14/97 15:41 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6805 Version: 9 Check-in Date: 14-Aug-1997 15:39:38 1.Proposal Title: A Detailed Study of the Blue Stragglers in the Core of M3 ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle HOT STARS GO 6 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Charles Bailyn Yale University CoI: Eric Rubenstein Dept. of Astronomy, Yale University N CoI: Pierre Demarque Dept. of Astronomy, Yale University N ------------------------------------------------------------------------------------ 6. Abstract We propose to observe the core of M3 for 8 orbits spaced over a time of 24 hours with the WFPC2 camera and F336W, F555W, and F814W filters. We intend to study the blue straggler sequence with the resulting high precision color-magnitude and color- color diagrams. We will also seach for variability among the blue stragglers and upper main sequence stars, and search for a binary star sequence to the red of the main sequence. These data, combined with a similar data set to be obtained with the WIYN telescope from the outer regions of the clusters, should answer crucial questions about the unusual blue straggler sequence and the stellar dynamics of M3. ------------------------------------------------------------------------------------ 6805( 9) - 08/14/97 15:41 - [ 2] Observations Description ------------------------ Each of the 8 orbits will contain 2 600s F336W exposures, 2 60s F555W exposures, 2 80s F814W exposures, and one additional exposure in F555W or F814W. Each exposure should avoid saturating the brightest BSs by about a magnitude. There will be a slight dither between each orbit to randomize the location of any given star within the chip. Any main sequence or blue straggler binary which could evolve into contact on its own has a binary period <= 20 hours. Contact binaries among the BSs should have orbits of around 10 hours, and less on the main sequence so this ensures that at least 2 orbital periods can be observed for binaries already in contact. SX Phe stars are only a few hours long. Real Time Justification ----------------------- We plan to carry out a similar study from the ground using the WIYN telescope. This should allow us to obtain a comparable data set for the outer regions of the cluster. However the ground based observations do not have sufficient resolution to study the core regions. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: ------------------------------------------------------------------------------------ 6805( 9) - 08/14/97 15:41 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC5272-POS1 star, blue straggler, RA=13H 42M 11.2S +/- 1S, DEC=28D 2000 V = 18.+/-4. stellar cluster, 22' 32.0" +/- 1" globular cluster 2 NGC5272-POS2 star, blue straggler, XI-OFF=0.5" +/- 0.1", ETA- 2000 V = 18.+/-4. stellar cluster, OFF=0.0" +/- 0.1", FROM 1 globular cluster 3 NGC5272-POS3 star, blue straggler, XI-OFF=1.0" +/- 0.1", ETA- 2000 V = 18.+/-4. stellar cluster, OFF=0.0" +/- 0.1", FROM 1 globular cluster 4 NGC5272-POS4 star, blue straggler, XI-OFF=0.0" +/- 0.1", ETA- 2000 V = 18.+/-4. stellar cluster, OFF=0.5" +/- 0.1", FROM 1 globular cluster 5 NGC5272-POS5 star, blue straggler, XI-OFF=0.0" +/- 0.1", ETA- 2000 V = 18.+/-4. stellar cluster, OFF=1.0" +/- 0.1", FROM 1 globular cluster 6 NGC5272-POS6 star, blue straggler, XI-OFF=0.5" +/- 0.1", ETA- 2000 V = 18.+/-4. stellar cluster, OFF=0.5" +/- 0.1", FROM 1 globular cluster 7 NGC5272-POS7 star, blue straggler, XI-OFF=0.5" +/- 0.1", ETA- 2000 V = 18.+/-4. stellar cluster, OFF=1.0" +/- 0.1", FROM 1 globular cluster 8 NGC5272-POS8 star, blue straggler, XI-OFF=1.0" +/- 0.1", ETA- 2000 V = 18.+/-4. stellar cluster, OFF=0.5" +/- 0.1", FROM 1 globular cluster 6805( 9) - 08/14/97 15:41 - [ 4] Visit: 01 Visit Requirements: 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 ------------------------------------------------------------------------------------------------------------------------------------ 11 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 1 ------------------------------------------------------------------------------------------------------------------------------------ 12 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 1 ------------------------------------------------------------------------------------------------------------------------------------ 13 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT 1 ------------------------------------------------------------------------------------------------------------------------------------ 14 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 1 ------------------------------------------------------------------------------------------------------------------------------------ 15 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 1 ------------------------------------------------------------------------------------------------------------------------------------ 16 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT SEQ 11-16 1 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 21 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 2 ------------------------------------------------------------------------------------------------------------------------------------ 22 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 2 ------------------------------------------------------------------------------------------------------------------------------------ 23 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT 2 ------------------------------------------------------------------------------------------------------------------------------------ 24 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 2 ------------------------------------------------------------------------------------------------------------------------------------ 25 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 2 ------------------------------------------------------------------------------------------------------------------------------------ 26 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT 2 ------------------------------------------------------------------------------------------------------------------------------------ 27 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT SEQ 21-27 2 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 31 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 3 ------------------------------------------------------------------------------------------------------------------------------------ 32 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 3 ------------------------------------------------------------------------------------------------------------------------------------ 6805( 9) - 08/14/97 15:41 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 33 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT 3 ------------------------------------------------------------------------------------------------------------------------------------ 34 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 3 ------------------------------------------------------------------------------------------------------------------------------------ 35 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 3 ------------------------------------------------------------------------------------------------------------------------------------ 36 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT 3 ------------------------------------------------------------------------------------------------------------------------------------ 37 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT SEQ 31-37 3 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 41 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 4 ------------------------------------------------------------------------------------------------------------------------------------ 42 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 4 ------------------------------------------------------------------------------------------------------------------------------------ 43 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT 4 ------------------------------------------------------------------------------------------------------------------------------------ 44 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 4 ------------------------------------------------------------------------------------------------------------------------------------ 45 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 4 ------------------------------------------------------------------------------------------------------------------------------------ 46 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT SEQ 41-46 4 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 6805( 9) - 08/14/97 15:41 - [ 6] Visit: 03 Visit Requirements: SAME ORIENT AS 01 AFTER 01 BY 0H TO 6H 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 ------------------------------------------------------------------------------------------------------------------------------------ 51 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 5 ------------------------------------------------------------------------------------------------------------------------------------ 52 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 5 ------------------------------------------------------------------------------------------------------------------------------------ 53 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT 5 ------------------------------------------------------------------------------------------------------------------------------------ 54 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 5 ------------------------------------------------------------------------------------------------------------------------------------ 55 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 5 ------------------------------------------------------------------------------------------------------------------------------------ 56 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT 5 ------------------------------------------------------------------------------------------------------------------------------------ 57 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT SEQ 51-57 5 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 61 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 6 ------------------------------------------------------------------------------------------------------------------------------------ 62 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 6 ------------------------------------------------------------------------------------------------------------------------------------ 63 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT 6 ------------------------------------------------------------------------------------------------------------------------------------ 64 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 6 ------------------------------------------------------------------------------------------------------------------------------------ 65 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 6 ------------------------------------------------------------------------------------------------------------------------------------ 66 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT SEQ 61-66 6 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 71 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 7 ------------------------------------------------------------------------------------------------------------------------------------ 72 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 7 ------------------------------------------------------------------------------------------------------------------------------------ 6805( 9) - 08/14/97 15:41 - [ 7] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 73 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT 7 ------------------------------------------------------------------------------------------------------------------------------------ 74 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 7 ------------------------------------------------------------------------------------------------------------------------------------ 75 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 7 ------------------------------------------------------------------------------------------------------------------------------------ 76 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT 7 ------------------------------------------------------------------------------------------------------------------------------------ 77 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT SEQ 71-77 7 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 81 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 8 ------------------------------------------------------------------------------------------------------------------------------------ 82 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 8 ------------------------------------------------------------------------------------------------------------------------------------ 83 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT 8 ------------------------------------------------------------------------------------------------------------------------------------ 84 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT 8 ------------------------------------------------------------------------------------------------------------------------------------ 85 NGC5272-POS WFPC2 IMAGE PC1-FIX F814W 1 100 S NO SPLIT 8 ------------------------------------------------------------------------------------------------------------------------------------ 86 NGC5272-POS WFPC2 IMAGE PC1-FIX F336W 1 600 S NO SPLIT 8 ------------------------------------------------------------------------------------------------------------------------------------ 87 NGC5272-POS WFPC2 IMAGE PC1-FIX F555W 1 60 S NO SPLIT SEQ 81-87 8 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 6805( 9) - 08/14/97 15:41 - [ 8] Summary Form for Proposal 6805 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category HOT STARS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements NO SPLIT NO SPLIT SEQ 11-16 NON-INT NO SPLIT SEQ 21-27 NON-INT NO SPLIT SEQ 31-37 NON-INT NO SPLIT SEQ 41-46 NON-INT SAME ORIENT AS 01 AFTER 01 BY 0H TO 6H NO SPLIT SEQ 51-57 NON-INT NO SPLIT SEQ 61-66 NON-INT NO SPLIT SEQ 71-77 NON-INT NO SPLIT SEQ 81-87 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F555W F814W F336W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC5272-POS1 NGC5272-POS2 NGC5272-POS3 NGC5272-POS4 NGC5272-POS5 NGC5272-POS6 NGC5272-POS7 NGC5272-POS8 ------------------------------------------------------------------------------------------------------------------------------------