6547( 5) - 11/14/96 10:31 - [ 0] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6547 Version: 5 Check-in Date: 14-Nov-1996 10:29:07 1.Proposal Title: Cooled Gas in X-Ray Emitting Elliptical Galaxies ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle GALAXIES & CLUSTERS GO 6 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: JOEL BREGMAN UNIVERSITY OF MICHIGAN CoI: Patricia Knezek Observatories of the Carnegie Institution N of Washington ------------------------------------------------------------------------------------ 6. Abstract There are two fundamental predictions of the current popular model for X-ray emitting gas in individual elliptical galaxies: the origin of the gas is stellar mass loss, and the X-ray emission cools the gas, leading to cooled material that is distributed through the galaxy. We can test these predictions by determining the amount of cool, metal-rich gas within the hot atmospheres. This will be accomplished by measuring the equivalent widths of absorption lines from cooled material (ionMg2, ionFe2) against the continuum of background quasars that we discovered. We propose observations for three early-type systems: NGC 4203, which has a bright quasar projected only 6 kpc (1min point9) from its center; NGC 720, an X-ray bright system with a quasar projected 33 kpc (6min point5) from the center; and NGC 4261, which has the most extensive hot atmosphere and where the quasar is projected 36 kpc (6min point7) from the center. ------------------------------------------------------------------------------------ Observations Description ------------------------ Observing times are justified above, and here we summarize the observing program. Acquisition of the target will take place with the BINARY search on the FOS, followed by a FOS/RED observation for each target. Standard calibrations for the FOS is adequate. Flat fielding limitations may prevent us from obtaining a S/N > 30 and the S/N listed below are due to photon statistics only. 0.25truein begintabularlccc &FOS/RED + G270H (2230-3270 AA:&\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\ionMg2 &ionFe2) & , Galaxy & \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\# orbits & t_exp & S/N (@ ionMg2) , NGC 720& 3 & 121 min& 30 , NGC 4203& 1 & 29 min& 46 , NGC 4261& 2 & 75 min& 39 , endtabular Real Time Justification ----------------------- None. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 6547( 5) - 11/14/96 10:31 - [ 1] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 TON1480 GALAXY,GALAXY RA=12H 15M 9.21S +/- J2000 V = 16.5+/-0.5 0.7",DEC=33D 09' 55.25" +/- B-V = 0.03 0.7",PLATE-ID=00Y2 Comments: We will obtain up-to-date magnitudes prior to HST observations, so we would like to know when the HST observations are to be scheduled. NOTE: A check with the PI in mid-November 1996 indicated that there were no changes to the magnitudes. - Ray Lucas 2 QSO1219+057 GALAXY,GALAXY RA=12H 19M 48.94S +/- J2000 V = 18.1+/-0.6 0.7",DEC=05D 45' 31.4" +/- 0.8",PLATE-ID=01UQ Comments: We wish to provide recent quasar magnitudes (as close to the HST observations as feasible), so we wish to be informed as to the dates of the planned HST observations. NOTE: A check with the PI in mid- November 1996 indicated that there were no changes to the magnitudes. - Ray Lucas 6547( 5) - 11/14/96 10:31 - [ 2] 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 ------------------------------------------------------------------------------------------------------------------------------------ 10 TON1480 FOS/RD ACQ/BIN 4.3 MIRROR 1 12 S ONBOARD ACQ FOR 20 ARY ------------------------------------------------------------------------------------------------------------------------------------ 20 TON1480 FOS/RD ACCUM 1.0 G270H 1 1630 S ------------------------------------------------------------------------------------------------------------------------------------ 6547( 5) - 11/14/96 10:31 - [ 3] Visit: 02 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 ------------------------------------------------------------------------------------------------------------------------------------ 10 QSO1219+057 FOS/RD ACQ/BIN 4.3 MIRROR 1 48 S ONBOARD ACQ FOR 20 ARY ------------------------------------------------------------------------------------------------------------------------------------ 20 QSO1219+057 FOS/RD ACCUM 1.0 G270H 1 3960 S ------------------------------------------------------------------------------------------------------------------------------------ 6547( 5) - 11/14/96 10:31 - [ 4] Summary Form for Proposal 6547 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/RD ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/BINARY ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category GALAXIES & CLUSTERS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 20 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G270H ------------------------------------------------------------------------------------------------------------------------------------ Target Names TON1480 QSO1219+057 ------------------------------------------------------------------------------------------------------------------------------------