! File: 3591C.PROP ! Database: PEPDB ! Date: 19-FEB-1994:13:08:08 coverpage: title_1: MASSIVE STARS IN STARBURST GALAXIES-FOC IMAGES(PART1) sci_cat: STELLAR POPULATIONS sci_subcat: MASSIVE STARS/BURSTS proposal_for: GO pi_fname: TIMOTHY pi_mi: M. pi_lname: HECKMAN pi_inst: STSCI pi_country: USA pi_phone: 301-338-7369 hours_pri: 24.83 num_pri: 13 foc: Y fos: Y funds_amount: 268922 funds_length: 12 off_fname: HERVEY off_mi: S. off_lname: STOCKMAN off_title: DEPUTY DIRECTOR off_inst: SPACE TELESCOPE SCIENCE INSTITUTE off_addr_1: 3700 SAN MARTIN DRIVE off_city: BALTIMORE off_state: MD off_zip: 21218 off_country: USA off_phone: 301-338-4700 ! end of coverpage abstract: line_1: Starburst galaxies are ideal laboratories to study both the line_2: physics of massive stars and processes important in galaxy line_3: formation and evolution. Observations of these galaxies at line_4: ultraviolet wavelengths are crucial to our understanding of the line_5: starburst phenomenon, because only in this spectral regime can we line_6: directly observe the spectroscopic signatures of the hot, massive line_7: stars that power the emission at other wavebands. Indeed, we line_8: believe that the investigation of the UV properties of starburst line_9: galaxies is one of the most valuable tasks to be undertaken with line_10: HST. We have identified what we believe to be an optimal sample of line_11: the UV-brightest starburst galaxies in the local universe. These line_12: span as broad a range as possible in metal abundance and starburst line_13: luminosity. We describe an HST program designed to both give us a line_14: broad overview of the UV properties and stellar content of line_15: starbursts and to answer some important specific questions about line_16: starbursts. We anticipate that observations like these will be the line_17: prelude to a decade of fundamental and exciting HST research on line_18: massive stars and starburst galaxies. ! ! end of abstract general_form_proposers: lname: HECKMAN fname: TIMOTHY title: PI mi: M. inst: STSCI country: USA ! lname: GARNETT fname: DON inst: STSCI country: USA ! lname: KINNEY fname: ANNE inst: STSCI country: USA ! lname: LEITHERER fname: CLAUS inst: STSCI country: USA esa: Y ! lname: ROBERT fname: CARMELLE inst: STSCI country: USA ! ! end of general_form_proposers block general_form_text: question: 2 section: 1 line_1: ! question: 3 section: 1 line_1: We will obtain an image of the UV continuum of each of the 9 galaxies. line_2: We will use the FOC in the f/48 mode with the F140W filter, combined line_3: with the F130LP to block geocoronal Ly-Alpha. These images will have line_4: scientific value on their own, and will be used to select targets line_5: for the FOS spectroscopy based on adequate surface brightness in a line_6: 1x1 arcsec region and a structure that will not confuse the FOS line_7: peak-up algorthm. After inspecting the FOC images we will select a line_8: subset of the sample for FOS spectroscopy. For each selected galaxy line_9: we will obtain two spectra with the blue detector through the 1x1 line_10: arcsec aperture, using the G130H and G190H gratings respectively. line_11: We will use the FOC images to set exposure times for the FOS spectra line_12: that are adequate to produce a SNR of 25 to 1 per diode. The G130H line_13: will be primarily used to measure the CIV1550 and SiIV1400 lines, line_14: which are the strongest lines seen in IUE spectra of starbursts. line_15: The G190H spectrum covers the HeII1640 and NIV1720 lines, which are line_16: crucial diagnostics of highly evolved stars, like Wolf-Rayets. The line_17: spectral resolution of about 500 km/sec will be adequate to meet line_18: our scientific objectives. ! question: 4 section: 1 line_1: The space-UV is the spectral region in which the hot, massive stars line_2: that power starburst galaxies can be best directly observed. IUE line_3: has too little collecting area and too poor spectral resolution line_4: to discriminate between an interstellar, photospheric, or stellar line_5: wind origin for the UV absorption lines seen in starbursts. ! question: 5 section: 1 line_1: We need the FOC images to be taken in advance of the final scheduling line_2: of the FOS spectral observations. The UV structures of these starbursts line_3: are unknown on arcsec-scales, and we presently have only UV fluxes line_4: obtained through a 10x20 arcsec aperture with IUE. In order to select line_5: the optimum targets for FOS observations, and in order to calculate line_6: the FOS exposure times needed to achieve our desired SNR of 25 to 1 per line_7: diode through the 1x1 arcsec FOS aperture, we need to inspect the FOC line_8: images prior to submitting the final exposure logsheets for the FOS. ! question: 6 section: 1 line_1: We have no special requirements. ! question: 7 section: 1 line_1: The FOC images will be inspected in order to select those galaxies line_2: with regions of high enough surface brightness within a 1x1 arcsec line_3: area to make FOS spectroscopy feasible. The derived UV fluxes in line_4: these regions will be used to calculate FOS exposure times needed line_5: to obtain an SNR of 25 to 1 per diode. We also plan to deconvolve the line_6: FOC images. The radial velocity, equivalent width, width, and flux line_7: will be measured for all detectable stellar and interstellar absorption line_8: and nebular emission lines in the FOS data. The broad profiles of the line_9: stellar wind lines will be compared to model profiles produced by line_10: Leitherer and Robert. ! question: 8 section: 1 line_1: We have measured coordinates for all our galaxies using GASP. line_2: Comparison of these positions to radio positions available for line_3: some of our galaxies indicates typical uncertainties of +/- 1 arcsec. line_4: These uncertainties must arise in part because the central parts of line_5: these galaxies are burned out on the POSS plates. The positions now line_6: in hand are adequate to place the region of interest safely within the line_7: 22x22 arcsec field of the FOC. For the FOS acquisitions, we plan to line_8: use the peak-up algorithm, initially within the 1.4x4.3 arcsec line_9: aperture, followed by a peak-up using the 1.0 arcsec aperture. This line_10: means that we need positions that are good to better line_11: than +/- 0.3 arcsec. Our plan is to use ground-based CCD images line_12: to locate the nuclei of these galaxies with respect to the Guide Star line_13: coordinate system by measuring positions of many field stars in each line_14: CCD and GASP frame. The CCD images are in hand for all but three of line_15: the nine targets, and we plan to get images of the other three targets line_16: within the next three months. ! question: 9 section: 1 line_1: Program 2644 "The Environments of Starburst Galaxies" C.A. Norman (PI), line_2: J.C. Blades, L. Danly, and T. Heckman (coI's). No observations for line_3: this program have been obtained yet. ! question: 10 section: 1 line_1: The data reduction and analysis will be undertaken at STScI line_2: and at JHU. The extensive computer software and FOS and FOC line_3: expertise available at these two institutions will be utilized (see line_4: above). We will use the SDA ('Science Data Analyst') pool at STScI line_5: to assist us in the data reduction and analysis. STScI will pay 25 percent line_6: of the salary of this person. In addition, at least one JHU graduate line_7: student (supported by other contract funds) will be involved in the line_8: portion of the project dealing with interstellar absorption lines. ! !end of general form text general_form_address: lname: HECKMAN fname: TIMOTHY mi: M. category: PI inst: STSCI addr_1: 3700 SAN MARTIN DRIVE city: BALTIMORE state: MD zip: 21218 country: USA phone: 301-338-7369 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: NGC1705 descr_1: E,318 pos_1: RA = 04H 54M 13.42S +/- 0.1S, pos_2: DEC = -53D 21' 41.2" +/- 1" equinox: J2000 rv_or_z: V = +640 acqpr_1: EXT acqpr_2: COMP fluxnum_1: 1 fluxval_1: F(1400) = 2.6 E-14 fluxnum_2: 2 fluxval_2: F(1650) = 2.0 E-14 ! targnum: 2 name_1: IZW18 descr_1: E,318 pos_1: RA = 9H 34M 02.09S +/- 0.03S, pos_2: DEC = +55D 14' 26.8" +/- 0.5" equinox: J2000 rv_or_z: V = +750 acqpr_1: EXT acqpr_2: COMP fluxnum_1: 1 fluxval_1: F(1400) = 2.6 E-15 fluxnum_2: 2 fluxval_2: F(1650) = 2.0 E-15 ! targnum: 3 name_1: NGC3310 descr_1: E,318 pos_1: RA = 10H 38M 45.82S +/- 0.1S, pos_2: DEC = +53D 30' 11.6" +/- 1" equinox: J2000 rv_or_z: V = +992 acqpr_1: EXT acqpr_2: COMP fluxnum_1: 1 fluxval_1: F(1400) = 1.7 E-14 fluxnum_2: 2 fluxval_2: F(1650) = 1.4 E-14 ! targnum: 4 name_1: NGC3690 descr_1: E,318 pos_1: RA = 11H 28M 30.83S +/- 0.1S, pos_2: DEC = +58D 33' 45.0" +/- 1" equinox: J2000 rv_or_z: V = +2988 acqpr_1: EXT acqpr_2: COMP fluxnum_1: 1 fluxval_1: F(1400) = 3.9 E-15 fluxnum_2: 2 fluxval_2: F(1650) = 3.0 E-15 ! targnum: 5 name_1: NGC3991 descr_1: E,318 pos_1: RA = 11H 57M 31.72S +/- 0.1S, pos_2: DEC = +32D 20' 30.8" +/- 1" equinox: J2000 rv_or_z: V = +3192 acqpr_1: EXT acqpr_2: COMP fluxnum_1: 1 fluxval_1: F(1400) = 9.5 E-15 fluxnum_2: 2 fluxval_2: F(1650) = 6.5 E-15 ! targnum: 6 name_1: NGC4670 descr_1: E,318 pos_1: RA = 12H 45M 17.17S +/- 0.1S, pos_2: DEC = +27D 07' 31.2" +/- 1" equinox: J2000 rv_or_z: V = +1076 acqpr_1: EXT acqpr_2: COMP fluxnum_1: 1 fluxval_1: F(1400) = 1.2 E-14 fluxnum_2: 2 fluxval_2: F(1650) = 9.2 E-15 ! targnum: 7 name_1: NGC5253 descr_1: E,318 pos_1: RA = 13H 39M 56.02S +/- 0.1S, pos_2: DEC = -31D 38' 23.6" +/- 1" equinox: J2000 rv_or_z: V = +395 acqpr_1: EXT acqpr_2: COMP fluxnum_1: 1 fluxval_1: F(1400) = 1.9 E-14 fluxnum_2: 2 fluxval_2: F(1650) = 1.5 E-14 ! targnum: 8 name_1: TOL1924-416 descr_1: E,318 pos_1: RA = 19H 27M 58.35S +/- 0.1S, pos_2: DEC = -41D 34' 30.9" +/- 1" equinox: J2000 rv_or_z: V = +2869 acqpr_1: EXT acqpr_2: COMP fluxnum_1: 1 fluxval_1: F(1400) = 7.7 E-15 fluxnum_2: 2 fluxval_2: F(1650) = 5.0 E-15 ! targnum: 9 name_1: NGC7552 descr_1: E,318 pos_1: RA = 23H 16M 10.54S +/- 0.1S, pos_2: DEC = -42D 35' 04.5" +/- 1" equinox: J2000 rv_or_z: V = +1589 acqpr_1: EXT acqpr_2: COMP fluxnum_1: 1 fluxval_1: F(1400) = 3.1 E-15 fluxnum_2: 2 fluxval_2: F(1650) = 3.0 E-15 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.100 targname: NGC1705 config: FOC/96 opmode: IMAGE aperture: 512X1024 sp_element: F220W,F1ND num_exp: 1 time_per_exp: 500S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: PIXEL=50X25 req_1: CYCLE 2; comment_1: USE COARSE TRACK IF NO comment_2: F-L GUIDE STARS AVAILABLE comment_3: OBSERVE LINES 1.1-9.1 comment_4: BEFORE 1-FEB-93 ! linenum: 2.100 targname: IZW18 config: FOC/96 opmode: IMAGE aperture: 512X1024 sp_element: F220W num_exp: 1 time_per_exp: 1500S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: PIXEL=50X25 req_1: CYCLE 2; comment_1: USE COARSE TRACK IF NO comment_2: F-L GUIDE STARS AVAILABLE; ! linenum: 3.100 targname: NGC3310 config: FOC/96 opmode: IMAGE aperture: 512X1024 sp_element: F220W num_exp: 1 time_per_exp: 200S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: PIXEL=50X25 req_1: CYCLE 2; comment_1: USE COARSE TRACK IF NO comment_2: F-L GUIDE STARS AVAILABLE; ! linenum: 4.100 targname: NGC3690 config: FOC/96 opmode: IMAGE aperture: 512X1024 sp_element: F220W num_exp: 1 time_per_exp: 900S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: PIXEL=50X25 req_1: CYCLE 2; comment_1: USE COARSE TRACK IF NO comment_2: F-L GUIDE STARS AVAILABLE; ! linenum: 5.100 targname: NGC3991 config: FOC/96 opmode: IMAGE aperture: 512X1024 sp_element: F220W num_exp: 1 time_per_exp: 400S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: PIXEL=50X25 req_1: CYCLE 2; comment_1: USE COARSE TRACK IF NO comment_2: F-L GUIDE STARS AVAILABLE; ! linenum: 6.100 targname: NGC4670 config: FOC/96 opmode: IMAGE aperture: 512X1024 sp_element: F220W num_exp: 1 time_per_exp: 300S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: PIXEL=50X25 req_1: CYCLE 2; comment_1: USE COARSE TRACK IF NO comment_2: F-L GUIDE STARS AVAILABLE; ! linenum: 7.100 targname: NGC5253 config: FOC/96 opmode: IMAGE aperture: 512X1024 sp_element: F220W,F1ND num_exp: 1 time_per_exp: 500S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: PIXEL=50X25 req_1: CYCLE 2; comment_1: USE COARSE TRACK IF NO comment_2: F-L GUIDE STARS AVAILABLE; ! linenum: 8.100 targname: TOL1924-416 config: FOC/96 opmode: IMAGE aperture: 512X1024 sp_element: F220W num_exp: 1 time_per_exp: 450S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: PIXEL=50X25 req_1: CYCLE 2; comment_1: USE COARSE TRACK IF NO comment_2: F-L GUIDE STARS AVAILABLE; ! linenum: 9.100 targname: NGC7552 config: FOC/96 opmode: IMAGE aperture: 512X1024 sp_element: F220W num_exp: 1 time_per_exp: 1000S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: PIXEL=50X25 req_1: CYCLE 2; comment_1: USE COARSE TRACK IF NO comment_2: F-L GUIDE STARS AVAILABLE; ! ! end of exposure logsheet ! No scan data records found