Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 4078c Report Date: 09-May-96:19:09 Version: ********** Check-in Date: ********** 1.Proposal Title: UV SPECTRA OF LOW-REDSHIFT QSOS, HE I AUGMENTATION: CYCLE 2 OBSERVATIONS ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID QUASARS & AGN AUG/FOS 3646 Sub Category AUG/FOS ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone E. margaret Burbidge UNIVERSITY OF CALIFORNIA, SA USA 619-534-4477 ------------------------------------------------------------------------------------ 7. Abstract This proposal contains observations which will help to complete a number of FOS IDT scientific programs. In a collaborative program with the GHRS IDT, we will study absorption from He I in the Lyman alpha forest clouds and in the intergalactic medium at high z to determine conditions in the early universe. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 2.14 par: 0 10. Num targs pri: 1 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: FOS ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 4078c PI: E. margaret Burbidge Proposal Title: UV SPECTRA OF LOW-REDSHIFT QSOS, HE I AUGMENTATION: CYCLE 2 OBSERVATIONS ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Richard J. Harms APPLIED RESEARCH CORPORATION USA Richard G. Allen UNIVERSITY OF ARIZONA USA J. Roger P. Angel UNIVERSITY OF ARIZONA USA Frank Bartko UNAFFILIATED USA Edward Beaver UC, SAN DIEGO USA Ralph C. Bohlin SPACE TELESCOPE SCIENCE USA INSTITUTE Pi E. Margaret Burbidge UC, SAN DIEGO USA Ross D. Cohen UC, SAN DIEGO USA Aurthur F. Davidsen JOHNS HOPKINS UNIVERSITY USA Holland C. Ford SPACE TELESCOPE SCIENCE USA INSTITUTE George F. Hartig SPACE TELESCOPE SCIENCE USA INSTITUTE Vesa T. Junkkarinen UC, SAN DIEGO USA Bruce H. Margon UNIVERSITY OF WASHINGTON USA ------------------------------------------------------------------------------------ 3. Description of proposed observations. Following a binary search target acquisition in the 4.3" aperture with the red detector, a peak-up will be used to center the object in the 0.25X2.0 slit. After this a 4500s RAPID mode observation with G270H will be made. The spacecraft must be oriented so that both of the brightest components (separated by 0.494") lie along the slit and perpendiculear to the diode array. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. He I lambda 584 cannot be observed redshifted into the optical in any known quasar. This object is one of the two best candidates for making these measurements. The associated Lyman-alpha and beta lines in this object also lie in the UV. The collecting area of HST and the sensitivity of the FOS and GHRS make it possible to obtain spectra with the signal to noise needed to carry out these studies of QSOs at wavelengths below the atmospheric cutoff. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. The spacecraft must be oriented so that both of the brightest components (separated by 0.494") lie along the slit and perpendiculear to the diode array. ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. These observations will be reduced using the standard spectroscopy and polarimetry reduction software available for FOS data. Calibration will be done using the results of SV observations. The absorption features in QSO spectra will be measured using existing software that has been used for optical data and the early HST spectra. The evolution of C IV lambda1549 absorption systems with redshift will be studied by counting these systems and carrying out the necessary statistical analysis. Unidentified lines below Ly-alpha emission are candidate Ly -alpha forest lines and will contribute to studies of the evolution of these absorbers. The He I systems will be studied by using curves of growth to obtain estimates and limits to column densities. Page 3 ------------------------------------------------------------------------------------ 8. Additional comments or special requests. Optical spectroscopy and photometry will be performed using the facilities of Lick Observatory. We will try to make the optical observations simultaneous with the HST UV observations if possible. There are a number of related FOS IDT GTO proposals in cycles 0, 1, and 2. These observations were originally written as portions of observations begun in those proposals. Thus the observations included here contain both the baseline and augmented portions. Some observations were moved from augmented to baseline proposals to balance this. ------------------------------------------------------------------------------------ 9. Description of previous HST work. Collaborators have received data from a number of GTO programs, SAT, and ERO programs. Related programs which have had observations are as follows: 1026 - ``UV Spectra of Low-Redshift-QSOs'', 1027 - ``UV Spectra of QSOs with z> 3.1'', 1029 - ``Spectropolarimetry of QSOs, Blazars, and AGN'', and 1033 - ``Search for Misdirected BL Lac Objects''. Low resolution observations of three high redshift QSOs have not revealed any with light at He II lambda 304. Observations of UM 675 have shown that any He I Gunn--Peterson effect is small, that He I absorption lines are not strong, that predictions of the ``Lyman valley'' may be correct, and that low redshift Ly-alpha is more prevalent than expected. Observations of low redshift QSOs (including 3C 273) have shown even more clearly that Ly-alpha absorption occurs in greater numbers than expected, as well as showing emission-- line profile differences more clearly than from earlier data. Unexpectedly, Ly- alpha is narrower than H-alpha. ``HST Imaging of the Inner 3 Arcseconds of NGC 1068 in the Light of [O III] lambda5007'', I.N.Evans, H.C.Ford, A.L.Kinney, R.R.J.Antonucci, L.Armus, and S.Caganoff, {\it Ap.J.(Lett.)}, {\bf 369}, L27, 1991. ``Faint Object Camera Observations of a Globular Cluster Nova Field'', B.Margon, S.F.Anderson, R.A.Downes, R.C.Bohlin, and P.Jakobsen, {\it Ap.J.(Lett.)}, {\bf 369}, L71, 1991. ``Far--Ultraviolet Spectroscopy of the Quasar UM 675 with the Faint Object Spectrograph on the Hubble Space Telescope'', E.A.Beaver, E.M.Burbidge, R.D.Cohen, V.T.Junkkarinen, R.W.Lyons, E.I.Rosenblatt, G.F.Hartig, B.Margon, and A.F.Davidsen, {\it Ap.J.(Lett.)}, {\bf 377}, L1, 1991. ``The Ultraviolet Absorption Spectrum of 3C 273'', J.N.Bahcall, B.T.Jannuzi, D.P.Schneider, G.F.Hartig, R.Bohlin, and V.Junkkarinen, {\it Ap.J.(Lett.)}, {\bf 377}, L5, 1991. ``Faint Object Spectrograph Spectroscopy of Resolved Structure in the Nucleus of NGC 1068'', S.Caganoff, R.R.J.Antonucci, H.C.Ford, G.A.Kriss, G.Hartig, L.Armus, I.N.Evans, E.Rosenblatt, R.C.Bohlin, and A.L.Kinney, {\it Ap.J.(Lett.)}, {\bf 377}, L9, 1991. ``Faint Object Spectrograph Observations of the Low-Luminosity Seyfert Galaxy NGC 1566'', G.A.Kriss, G.F.Hartig, L.Armus, W.P.Blair, S.Caganoff, and L.Dressel, {\it Ap.J.(Lett.)}, {\bf 377}, L13, 1991. ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). The majority of the resources required for this project other than the normal facilities of a university (librarys, offices, etc.) were supplied by NASA to the members of the FOS IDT for these projects. These include all the computing facilities required for the completion of data reduction and analysis. Optical and IR ground--based observing facilities and support are provided by the University of California and the University of Arizona. ------------------------------------------------------------------------------------ 11. Address Information Name: E. MARGARET BURBIDGE Category: PI Institution: UNIVERSITY OF CALIFORNIA, SAN DIE Address: CASS 0111, UCSD 9500 GILMAN DRIVE City: LA JOLLA State: CA Zip Code: 920930111 Country: USA Telephone: 619-534-4477 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 4078c [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial |Acqui|FLX| Flux data No | Name | Description | Position |Eqnx | Vel. |Prblm|REF| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 7 PG1115+080 E,313,321,323, RA = 11H 18M 16.934S +/- 2000 Z=1.722 1 V=17.0 +/- 1.0 H,515,519 1.0", 2 F(1500)=2.0 +/- 0.5 E-15 DEC = 07D 45' 58.53" +/- 1.0", PLATE-ID = 00ZW ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 4078c [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 18.5 PG1115+080 FOS/RD ACQ/ 4.3 MIRROR BRIGHT=700000 1 10S 1 1 ONBOARD ACQ FOR BINARY 18.55 SEQ 18.5-18.6 NO GAP CYCLE 2 / 18.5- 18.6 Comments: THE ORIENT IS DETERMINED BY ORIENT 101.51D +/- ADDING AN OFFSET ANGLE OF 81.81 12.0D / 18.5-18.6 TO THE 19.7D POS ANGLE OF THE RELATIVE POSITION OF THE OBJECTS TO ALIGN BOTH ON THE SLIT. AN OFFSET DIFFERENT BY 180D IS OK. ------------------------------------------------------------------------------------------------------------------------------------ 18.55 PG1115+080 FOS/RD ACQ/ 0.25X2. MIRROR TYPE=UP 1 10S 1 1 ONBOARD ACQ FOR PEAK 0 18.6 SPATIAL SCAN ------------------------------------------------------------------------------------------------------------------------------------ 18.6 PG1115+080 FOS/RD RAPID 0.25X2. G270H 2700 READ-TIME=40 1 4500S 15 2 1 0 ------------------------------------------------------------------------------------------------------------------------------------ Scan Paramters Form Proposal ID: 4078c [ 6] ------------------------------------------------------------------------------------------------------------------------------------ Data ID: 1 Exposure Logsheet lines: 18.55 FGS Scan: DWELL Dwell Only: dwell points/line: 7 Seconds per dwell: 0.00 Scan width (arc-secs): 0.0000 Scan length (arc-secs): 0.4000 Angle between sides (degrees) 0.00 Number of lines: 1 Scan rate (arc-sec/sec): 0.0000 PA of first scan line (degrees) 90.000 Scan frame (CEL or S/C): S/C Length Offset (arc-sec): 0.2000 Width Offset (arc-sec): ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 4078c [ 7] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/RD ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/BINARY ACQ/PEAK RAPID ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BRIGHT TYPE=UP READ-TIME=40 ------------------------------------------------------------------------------------------------------------------------------------ Proposal for AUG/FOS ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 2.14 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category QUASARS & AGN ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category AUG/FOS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 18.55; SEQ 18.5-18.6 NO GAP; CYCLE 2 / 18.5-18.6; ORIENT 101.51D +/- 12.0D / 18.5-18.6 ONBOARD ACQ FOR 18.6; SPATIAL SCAN ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G270H ------------------------------------------------------------------------------------------------------------------------------------ Target Names PG1115+080 ------------------------------------------------------------------------------------------------------------------------------------