! File: 1012C.PROP ! Database: PEPDB ! Date: 15-FEB-1994:22:19:02 coverpage: title_1: HIGH-RESOLUTION SURFACE PHOTOMETRY OF NGC 4314 : CYCLE 0 sci_cat: GALAXIES & CLUSTERS proposal_for: GTO/AST pi_fname: WILLIAM pi_mi: H. pi_lname: JEFFERYS pi_inst: TEXAS, UNIVERSITY OF pi_country: USA pi_phone: 512-471-1455 keywords_1: GALAXIES, BARRED GALAXIES, PECULIAR GALAXIES, NUCLEAR keywords_2: RINGS hours_pri: 5.21 num_pri: 2 wf_pc: Y pi_position: PROFESSOR ! end of coverpage abstract: line_1: We propose to obtain ST WF/PC surface photometry of NGC 4314. line_2: NGC 4314 exhibits anomalous nuclear activity indicative of on-going star line_3: formation. Multicolor surface photometry with 0.1 to 0.4 arcsec line_5: resolution will afford an opportunity to explore the global interrelationships line_6: between gas clouds, dust, star formation, and stellar populations with detail line_7: never before obtained. The expected maximum resolution for for NGC 4314 is line_8: 10 parsecs. While most of the data will be secured after the refurb mission line_9: with WFPC II, these early I-band exposures will allow studies of structures. ! ! end of abstract general_form_proposers: lname: JEFFERYS fname: WILLIAM mi: H. inst: TEXAS, UNIVERSITY OF country: USA ! lname: SHELUS fname: PETER mi: J. inst: TEXAS, UNIVERSITY OF country: USA ! lname: HEMENWAY fname: PAUL mi: D. inst: TEXAS, UNIVERSITY OF country: USA ! lname: FREDRICK fname: LAURENCE mi: W. inst: VIRGINIA, UNIVERSITY OF country: USA ! lname: VAN ALTENA fname: WILLIAM mi: F. inst: YALE UNIVERSITY country: USA ! lname: BENEDICT fname: GEORGE mi: F. inst: TEXAS, UNIVERSITY OF country: USA ! lname: DUNCOMBE fname: RAYNOR mi: L. inst: TEXAS, UNIVERSITY OF country: USA ! lname: FRANZ fname: OTTO mi: G. inst: LOWELL OBSERVATORY country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: The bandpasses are chosen for comparison with ground-based observations and to line_2: obtain a long wavelength baseline to allow an effective probe for young stars line_3: and into dusty regions. The observing times are estimated from much line_4: lower-resolution ground-based observations (see References) and from the WF/PC line_5: User's Guide. line_7: These observations will be made with the WF/PC in WF configuration. line_8: Two exposures in each line_9: bandpass will be summed and compared to allow cosmic ray detection and removal. line_10: Sky brightness data will be obtained from the outer sections of the 2.57 x 2.57 line_11: arcmin field of view, since the galaxy has B(SURF) > 25 per square arcsec at line_12: these distances from the nucleus. line_14: We expect to observe NGC 4314 in June 1991, I-band (F785LP) only. line_15: (Cycle 1). ! question: 4 section: 1 line_1: Multicolor surface photometry with 0.10 to 0.4 arcsec resolution will afford an line_2: opportunity to explore the global interelationships between gas clouds, dust, line_3: star formation, and stellar populations with detail rarely, if ever, obtained line_4: with ground-based instrumentation. The best resolution that can be routinely line_5: obtained from the ground is about 0.5 arcsec. The best obtained for this line_6: galaxy is about 2 arcseconds. Assuming Ho = 100, the expected resolution for line_9: NGC 4314 is 8 parsecs line_10: resolution, or 16 parsec resolution, if post-observation pixel summation is line_11: required. It is expected that simple resolution-enhancement techniques line_12: such as unsharp masking will provide much information on the distribution line_13: of stars and dust within the nuclear spiral of NGC 4314. ! question: 6 section: 1 line_1: Dark-Time required due to low surface brightness of objects. line_2: Dark-Time required due to terminator-induced spacecraft jitter. line_3: Observations should be scheduled at least ten minutes after terminator line_4: crossing, to minimize loss of lock potential. ! question: 7 section: 1 line_1: Initial data reduction and preliminary analysis will be carried out at the line_2: STScI, using SDAS. We assume that flat-field, bias, dark frame, and Kelsall line_3: Dot exposures will be provided by the calibration database. Final analysis line_4: will be done at the University of Texas. ! question: 10 section: 1 line_1: Sun SparcStation 1+ running IRAF ! question: 12 section: 1 line_1: Proposers may require access to STScI resources for preparation of final line_2: color-coded and grey-scale maps for publication. ! question: 13 section: 1 line_1: Using the PC, we propose to obtain I band images line_2: of NGC 4314 (active nuclear ring). line_3: Resolutions will range from 0.09 to 0.4 arcsec. These basic data will line_4: provide constraints for theories of gas accretion and star formation line_5: in galactic nuclei. ! !end of general form text general_form_address: lname: JEFFERYS fname: WILLIAM mi: H. category: PI inst: UNIVERSITY OF TEXAS addr_1: ASTRONOMY DEPARTMENT city: AUSTIN state: TX zip: 78712 country: USA phone: 512-471-1455 ! lname: BENEDICT fname: GEORGE mi: F. category: CON inst: UNIVERSITY OF TEXAS addr_1: ASTRONOMY DEPARTMENT city: AUSTIN state: TX zip: 78712 country: USA phone: 512-471-3448 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: NGC4314 descr_1: BARRED GALAXY WITH NUCLEAR RING pos_1: RA=12H 20M 1.8S +/- 0.5S, pos_2: DEC=+30D 10' 23.1" +/- 0.4" equinox: 1950.0 pm_or_par: N rv_or_z: V=+879 acqpr_1: EXT comment_1: RANGE IN FLUX DATA ACTUALLY comment_2: +2 AND -1 FOR NGC4314 fluxnum_1: 1 fluxval_1: SURF(V)=18 +/- 1.5 fluxnum_2: 2 fluxval_2: SURF(U)=20.3 +/- 1.5 fluxnum_3: 3 fluxval_3: SURF(I)=17.0 +/- 1.0 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: NGC4314 config: PC opmode: IMAGE aperture: ALL sp_element: F785LP wavelength: 8922 num_exp: 2 time_per_exp: 200S s_to_n: 15 fluxnum_1: 2 priority: 1 param_1: PRE-FLASH=YES req_1: CYCLE 0 / 1; req_2: DARKTIME / 1; req_5: NON-INT / 1; req_6: GUID TOL 0.007" comment_1: AVOID TERMINATOR CROSSING comment_2: FINE-LOCK REQUIRED comment_3: AT 24-JUN-91 +/- 30D comment_4: WAIT UNTIL CONTAMINATION PROBLEMS comment_5: ARE RESOLVED BEFORE EXECUTING THIS ! ! end of exposure logsheet ! No scan data records found