Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 2524c Report Date: 09-May-96:17:10 Version: ********** Check-in Date: ********** 1.Proposal Title: SPECTROPOLARIMETRY OF BRIGHT QUASARS ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID QUASARS & AGN GO Sub Category QUASAR EMISSION ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Prof. Chris Impey ARIZONA, UNIVERSITY OF USA (602)-621-6522 ASSOCIATE PROFESSOR ------------------------------------------------------------------------------------ 7. Abstract We request 10.5 hours with the FOS to obtain the first ultraviolet polarimetry of the five bright quasars. They have been specifically selected from a large optical polarimetric survey; their measured U,B,V,R and I colors and polarizations indicate the absence of contaminating starlight,dust or blazar components. These observations will be combined with quasi-simultaneous ground based polarimetry and spectrophotometry, to double the spectral coverage into the critical UV region. These data will be analyzed with multiwavelength fitting techniques. Several emission mechanisms contribute to the optical- ultraviolet continuum in quasars, including a power law of slope ~ 1(S_v proportional to v -1), an optically thick thermal component which peaks in the ultraviolet, and occasionally a highly polarized and variable synchroton power law. The combined UV and optical spectropolarimetry will determine, for the first time, the polarization of these individual components, including that of the strong ultraviolet excess. We will check to see if the observed polarization can be fully explained by a synchrotron component or external scatterers (electrons or dust). If, however, the observed rise of polarization into the blue is attributable to an accretion disk with an electron scattering atmosphere, we will infer its optical thickness, shape and orientation. Thus HST spectropolarimetry provides a unique test of the physical emission mechanisms which produce the energy of quasars. ------------------------------------------------------------------------------------ 8. Scientific Key Words: QUASAR, CONTINUUM, RADIATION ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 10.50 par: 0 10. Num targs pri: 1 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: FOS ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 2524c PI: Prof. Chris Impey Proposal Title: SPECTROPOLARIMETRY OF BRIGHT QUASARS ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ P.I. Chris Impey ARIZONA, UNIVERSITY OF USA Matthew A. Malkan CALIFORNIA, UNIVERSITY OF, LOS USA ANGELES ------------------------------------------------------------------------------------ 11. Address Information Name: CHRIS IMPEY Category: PI Institution: UNIVERSITY OF ARIZONA Address: STEWARD OBSERVATORY City: TUCSON State: AZ Zip Code: 85721 Country: USA Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 2524c [ 3] ------------------------------------------------------------------------------------------------------------------------------------ 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 PG1222+228 GALAXY; QUASAR RA=12H 25M 27.393S+/-0.010", 2000 Z=2.046 1 V=15.5+/-0.1 TON1530 DEC=+22D 35' 13.08"+/-0.10", 2 F-CONT(3000)=23+/-3E-17 PLATE-ID = 01TD Comments: BRIGHT QUASAR, FOS SPECTROPOLARIMETRY ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 2524c [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 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 PG1222+228 FOS/BL ACQ/ 4.3 MIRROR 1 1.3S 17 2 1 CYCLE 1 / 1.0-20.0 BINARY ONBOARD ACQ FOR 2- 9 Comments: BRIGHT QUASARS, FOS SPECTROPOLARIMETRY ------------------------------------------------------------------------------------------------------------------------------------ 2 PG1222+228 FOS/BL ACCUM 4.3 G190H 1600- POLSCAN=8B 1 24M 30 2 1 2300 ------------------------------------------------------------------------------------------------------------------------------------ 3 PG1222+228 FOS/BL ACCUM 4.3 G270H 2230- POLSCAN=8B 1 24M 40 2 1 3300 ------------------------------------------------------------------------------------------------------------------------------------ 4 PG1222+228 FOS/BL ACCUM 4.3 G190H 1600- POLSCAN=8B 1 24M 30 2 1 2300 ------------------------------------------------------------------------------------------------------------------------------------ 5 PG1222+228 FOS/BL ACCUM 4.3 G270H 2230- POLSCAN=8B 1 24M 40 2 1 3300 ------------------------------------------------------------------------------------------------------------------------------------ 6 PG1222+228 FOS/BL ACCUM 4.3 G190H 1600- POLSCAN=8B 1 24M 30 2 1 2300 ------------------------------------------------------------------------------------------------------------------------------------ 7 PG1222+228 FOS/BL ACCUM 4.3 G270H 2230- POLSCAN=8B 1 24M 40 2 1 3300 ------------------------------------------------------------------------------------------------------------------------------------ 8 PG1222+228 FOS/BL ACCUM 4.3 G190H 1600- POLSCAN=8B 1 24M 30 2 1 2300 ------------------------------------------------------------------------------------------------------------------------------------ 9 PG1222+228 FOS/BL ACCUM 4.3 G270H 2230- POLSCAN=8B 1 24M 40 2 1 3300 ------------------------------------------------------------------------------------------------------------------------------------ 9.5 PG1222+228 FOS/BL ACQ/ 4.3 MIRROR 1 1.3S 17 2 1 CYCLE 1 / 1.0-20.0 BINARY ONBOARD ACQ FOR 10-17 Comments: BRIGHT QUASARS, FOS SPECTROPOLARIMETRY ------------------------------------------------------------------------------------------------------------------------------------ 10 PG1222+228 FOS/BL ACCUM 4.3 G190H 1600- POLSCAN=8B 1 24M 30 2 1 2300 ------------------------------------------------------------------------------------------------------------------------------------ 11 PG1222+228 FOS/BL ACCUM 4.3 G270H 2230- POLSCAN=8B 1 24M 40 2 1 3300 ------------------------------------------------------------------------------------------------------------------------------------ 12 PG1222+228 FOS/BL ACCUM 4.3 G190H 1600- POLSCAN=8B 1 24M 30 2 1 2300 ------------------------------------------------------------------------------------------------------------------------------------ 13 PG1222+228 FOS/BL ACCUM 4.3 G270H 2230- POLSCAN=8B 1 24M 40 2 1 3300 ------------------------------------------------------------------------------------------------------------------------------------ 14 PG1222+228 FOS/BL ACCUM 4.3 G190H 1600- POLSCAN=8B 1 24M 30 2 1 2300 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 2524c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 15 PG1222+228 FOS/BL ACCUM 4.3 G270H 2230- POLSCAN=8B 1 24M 40 2 1 3300 ------------------------------------------------------------------------------------------------------------------------------------ 16 PG1222+228 FOS/BL ACCUM 4.3 G190H 1600- POLSCAN=8B 1 24M 30 2 1 2300 ------------------------------------------------------------------------------------------------------------------------------------ 17 PG1222+228 FOS/BL ACCUM 4.3 G270H 2230- POLSCAN=8B 1 24M 40 2 1 3300 ------------------------------------------------------------------------------------------------------------------------------------ 17.5 PG1222+228 FOS/BL ACQ/ 4.3 MIRROR 1 1.3S 17 2 1 CYCLE 1 / 1.0-20.0 BINARY ONBOARD ACQ FOR 18-20 Comments: BRIGHT QUASARS, FOS SPECTROPOLARIMETRY ------------------------------------------------------------------------------------------------------------------------------------ 18 PG1222+228 FOS/BL ACCUM 4.3 G190H 1600- POLSCAN=8B 1 24M 30 2 1 2300 ------------------------------------------------------------------------------------------------------------------------------------ 19 PG1222+228 FOS/BL ACCUM 4.3 G270H 2230- POLSCAN=8B 1 24M 40 2 1 3300 ------------------------------------------------------------------------------------------------------------------------------------ 20 PG1222+228 FOS/BL ACCUM 4.3 G190H 1600- POLSCAN=8B 1 24M 30 2 1 2300 ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 2524c [ 6] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/BL ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/BINARY ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters POLSCAN=8B ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 10.50 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category QUASARS & AGN ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category QUASAR EMISSION ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 1 / 1.0-20.0; ONBOARD ACQ FOR 2-9 CYCLE 1 / 1.0-20.0; ONBOARD ACQ FOR 10-17 18-20 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G190H G270H ------------------------------------------------------------------------------------------------------------------------------------ Target Names PG1222+228 TON1530 ------------------------------------------------------------------------------------------------------------------------------------