8538( 6) - 06/21/99 11:13 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 8538 Version: 6 Check-in Date: 21-Jun-1999 11:12:52 1.Proposal Title: Hubble Heritage observations of Hickson Compact Galaxy Group 87 ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO/DD 8 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Keith Noll Space Telescope Science Institute CoI: Sally Hunsberger Lowell Observatory N CoI: Jane Charlton Penn State University N CoI: Forrest Hamilton Computer Sciences Corp./Space Telescope Y Science Institute CoI: Howard Bond Space Telescope Science Institute N CoI: Carol Christian Space Telescope Science Institute N CoI: Jayanne English Space Telescope Science Institute N CoI: Lisa Frattare Space Telescope Science Institute N CoI: Anne Kinney Space Telescope Science Institute N CoI: Zolt Levay Space Telescope Science Institute N ------------------------------------------------------------------------------------ 5. Abstract We are observing HCG 87 as part of the Hubble Heritage Project. The aim of the Heritage Project is to provide spectacular HST color images for public release, outreach, and education. The Hickson compact groups of galaxies (HCGs) represent a site of freq uent giant galaxy interactions, and provide an opportunity to study these processes in a controlled present day environment. They are the sights of present-day galaxy formation in the form of tidal dwarf galaxies forming in the debris of interactions, and also likely of globular star cluster formation such as seen in "the Antennae" and other isolated interacting pairs. HCG87 distinguishes itself as one of the most "active" HCGs, hosting two AGNs and a starburst among its three members, all of which show signs of interaction. Thus multi-color WFPC2 observations provide an ideal opportunity to study the relationships between these processes. We propose B (5 orbits), V (2 orbits), R (2 orbits), and I (1 orbit) - band obse rvations of HGC87, the deepest ima ges of any Hickson compact group. The observing strategy will enable us to detect tidal debris (S/N=2.2) and map its structure, to map regions of star formation and place them in an evolutionary sequence, and to search for dwarf galaxies associated w ith the giant galaxies and at large in the group. The three giant galaxies themselves present a rich variety: a large "boxy" spiral with a prominent dust lane and an AGN (87a), a nearby lenticular that also houses an AGN (87b), and the northernmost spiral (87c) that is a possible starburst. The sequence of star formation mapped spatially throughout this group may be the best opportunity to sequence the interplay between interactions and the different levels of star formation acting from the tidal debris in through the central engines of these galaxies. ------------------------------------------------------------------------------------ 8538( 6) - 06/21/99 11:13 - [ 2] Observations Description ------------------------ HCG 87 will be observed using 8 orbits of DD time to obtain exposures in B, V, and R (F450W, F555W, and F675W). Normal dithering will be done to increase sampling of the PSF. Real Time Justification ----------------------- Calibration Justification ------------------------- Real_Time_Justification Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Paper Products: NO Media: ELECTRONIC Blocking Factor: 10 Ship To: STSCI Ship Via: Email: hamilton@stsci.edu ------------------------------------------------------------------------------------ 8538( 6) - 06/21/99 11:13 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HCG87 CLUSTER OF GALAXIES, RA=20H 48M 14.88S +/- 5", DEC=- J2000 Z=0.0296 SURF(V) = 24.6+/-1.0 GROUP, INTERACTING 19D 50' 55.8" +/- 5" 0 GALAXY Comments: Coordinates refer to the nucleus of the bright edge-on spiral. and are from ApJ 399 p353, Dynamical Properties of Compact Groups of Galaxies, Hickson P., et al. We POS TARG from this postion to properly position the group. Error measureme nt is a guess on my part. No error measurement found in the Hickson paper. The redshift measurement is also from same paper as the position mesurement (reference: 1992ApJ...399..353H). 8538( 6) - 06/21/99 11:13 - [ 4] Visit: 01 Visit Priority: Visit Requirements: ORIENT 270.0D TO 270.0D BETWEEN 15-Jul-1999 AND 01-Aug-1999 SCHED 100% 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 HCG87 WFPC2 IMAGE WF3-FIX F450W CR-SPLIT=0.5,CR-TOLERANCE=0.1 1 2500 S POS TARG 25.0,-5.0 EXPAND ------------------------------------------------------------------------------------------------------------------------------------ 2 HCG87 WFPC2 IMAGE WF3-FIX F450W CR-SPLIT=0.5,CR-TOLERANCE=0.1 1 2600 S POS TARG 25.2,-5.2 EXPAND ------------------------------------------------------------------------------------------------------------------------------------ 3 HCG87 WFPC2 IMAGE WF3-FIX F450W CR-SPLIT=0.5,CR-TOLERANCE=0.1 1 2600 S POS TARG 25.4,-5.4 EXPAND ------------------------------------------------------------------------------------------------------------------------------------ 8538( 6) - 06/21/99 11:13 - [ 5] Visit: 02 Visit Priority: Visit Requirements: SAME ORIENT AS 01 BETWEEN 15-Jul-1999 AND 01-Aug-1999 SCHED 100% 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 HCG87 WFPC2 IMAGE WF3-FIX F450W CR-SPLIT=0.5,CR-TOLERANCE=0.1 1 2500 S POS TARG 25.0,-5.0 EXPAND ------------------------------------------------------------------------------------------------------------------------------------ 2 HCG87 WFPC2 IMAGE WF3-FIX F450W CR-SPLIT=0.5,CR-TOLERANCE=0.1 1 2600 S POS TARG 25.2,-5.2 EXPAND ------------------------------------------------------------------------------------------------------------------------------------ 8538( 6) - 06/21/99 11:13 - [ 6] Visit: 03 Visit Priority: Visit Requirements: SAME ORIENT AS 01 BETWEEN 15-Jul-1999 AND 01-Aug-1999 SCHED 100% 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 HCG87 WFPC2 IMAGE WF3-FIX F555W CR-SPLIT=0.5,CR-TOLERANCE=0.1 1 2500 S POS TARG 25.0,-5.0 EXPAND ------------------------------------------------------------------------------------------------------------------------------------ 2 HCG87 WFPC2 IMAGE WF3-FIX F555W CR-SPLIT=0.5,CR-TOLERANCE=0.1 1 2600 S POS TARG 25.2,-5.2 EXPAND ------------------------------------------------------------------------------------------------------------------------------------ 8538( 6) - 06/21/99 11:13 - [ 7] Visit: 04 Visit Priority: Visit Requirements: SAME ORIENT AS 01 BETWEEN 15-Jul-1999 AND 01-Aug-1999 SCHED 100% 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 HCG87 WFPC2 IMAGE WF3-FIX F675W CR-SPLIT=0.5,CR-TOLERANCE=0.1 1 2500 S POS TARG 25.0,-5.0 EXPAND ------------------------------------------------------------------------------------------------------------------------------------ 2 HCG87 WFPC2 IMAGE WF3-FIX F675W CR-SPLIT=0.5,CR-TOLERANCE=0.1 1 2600 S POS TARG 25.2,-5.2 EXPAND ------------------------------------------------------------------------------------------------------------------------------------ 3 HCG87 WFPC2 IMAGE WF3-FIX F814W CR-SPLIT=0.5,CR-TOLERANCE=0.1 1 2600 S POS TARG 25.4,-5.4 EXPAND ------------------------------------------------------------------------------------------------------------------------------------ 8538( 6) - 06/21/99 11:13 - [ 8] Summary Form for Proposal 8538 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WF3-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=0.5 CR-TOLERANCE=0.1 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO/DD ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 270.0D TO 270.0D BETWEEN 15-Jul-1999 AND 01-Aug-1999 SCHED 100% POS TARG 25.0,-5.0 EXPAND POS TARG 25.2,-5.2 EXPAND POS TARG 25.4,-5.4 EXPAND SAME ORIENT AS 01 BETWEEN 15-Jul-1999 AND 01-Aug-1999 SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F450W F555W F675W F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names HCG87 ------------------------------------------------------------------------------------------------------------------------------------