Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5096 Report Date: 18-Jul-95:16:58 Version: ********** Check-in Date: ********** 1.Proposal Title: BL LAC OBJECTS: AO 0235 + 164: CYCLE 4 OBSERVATIONS ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID QUASARS & AGN GTO/FOS 1035 Sub Category GTO/FOS ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone E. margaret Burbidge UNIVERSITY OF CALIFORNIA, SA USA 619-534-4477 ------------------------------------------------------------------------------------ 7. Abstract AO0235+164 is an unusual case of a BL Lac object with very weak emission lines, 2 metallic line absorptions at z = 0.524, 0.851, and variable 21-cm absorption at z = 0.524. It has a faint emission-line companion 2 arc sec south with z = 0.524 and another companion 1.3 arc sec East. An earlier proposal will observe L alpha absorption at both absorption redshifts and search for UV emission lines. In this proposal multi-color imaging will be used to study the absorbers and host galaxy of AO 0235 itself. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 1.44 par: 0 10. Num targs pri: 1 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: WF/PC ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5096 PI: E. margaret Burbidge Proposal Title: BL LAC OBJECTS: AO 0235 + 164: CYCLE 4 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 Aurthur F. Davidsen JOHNS HOPKINS UNIVERSITY USA Holland C. Ford SPACE TELESCOPE SCIENCE USA INSTITUTE George F. Hartig SPACE TELESCOPE SCIENCE USA INSTITUTE Bruce H. Margon UNIVERSITY OF WASHINGTON USA ------------------------------------------------------------------------------------ 3. Description of proposed observations. A 1200s WFC exposure will be done with a B filter. 600s exposures will be done with an R filter and a wide band filter. See question 5 for a description of the ORIENTATION requirements. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. The spatial resolution of the HST is required because faint features will be contaminated by the PSF of the bright object if observed from the ground. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. The orientation of the spacecraft should be such that the readout of the WF3 chip does not lead to bleeding of the bright object onto fainter objects at position angles of roughly 60 and 185 degrees. So the position angle of the "object" (the line between these two directions) is 122.5 degrees, and we want the readout to point towards 302.5 degrees - in a direction opposite of the position angle between these direction. We derived the position angle for this program as 122.5 +135 (the offset from table 7.4). Please confirm that this is correct. ------------------------------------------------------------------------------------ 8. Additional comments or special requests. Optical polarimetry and photometry will be performed using the facilities of Steward Observatory. 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. This imposes no requirements on HST scheduling except as noted in question 5. Page 3 ------------------------------------------------------------------------------------ 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 = 5096 [ 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| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 1 AO0235+164 E,316,325, RA=2H 38M 38.913S +/- 0.3", 2000 Z=.94 1 V=16.5 +/- 2.0 H,515,516,519 DEC=16D 36' 59.76" +/- 0.3", 2 F(1800)=8 +/- 4 E-17 PLATE-ID = 01G9 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5096 [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 1 AO0235+164 WFPC2 IMAGE WF3 F450W 1 1200S 1 1 CYCLE 4 / 1-1.4 ORIENT 257.5D +/- 102.5D / 1-1.4 Comments: THE OBJECT PA IS 122.5 D. TO KEEP WF3 FROM BLEEDING IN THIS DIRECTION WE USED AN OFFSET OF 135D FROM TABLE 7.4. SEE GENERAL FORM QUESTION 5. ------------------------------------------------------------------------------------------------------------------------------------ 1.2 AO0235+164 WFPC2 IMAGE WF3 F785LP CR-SPLIT=0.5 1 600S 1 1 SEQ 1.2-1.4 NO GAP Comments: THE 3 IMAGES IN THIS PROGRAM CAN BE DONE IN ANY ORDER WHICH MAXIMIZES SPACECRAFT EFFICIENCY. ------------------------------------------------------------------------------------------------------------------------------------ 1.4 AO0235+164 WFPC2 IMAGE WF3 F702W CR-SPLIT=0.5 1 600S 1 1 ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5096 [ 6] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=0.5 ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GTO/FOS ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 1.44 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category QUASARS & AGN ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category GTO/FOS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 4 / 1-1.4; ORIENT 257.5D +/- 102.5D / 1-1.4; SEQ 1.2-1.4 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F450W F785LP F702W ------------------------------------------------------------------------------------------------------------------------------------ Target Names AO0235+164 ------------------------------------------------------------------------------------------------------------------------------------