6505( 8) - 03/27/96 16:11 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6505 Version: 8 Check-in Date: 27-Mar-1996 16:08:29 1.Proposal Title: Confirming the Quasar in Cygnus A ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle AGN GO 6 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Robert Antonucci University of California, Santa Barbara CoI: Todd Hurt University of California, Santa Barbara N CoI: Anne Kinney Space Telescope Science Institute N ------------------------------------------------------------------------------------ 6. Abstract In an earlier G270H spectrum, we discovered an apparent broad MgII line in the prototypical powerful double radio galaxy Cygnus A, showing that the latter harbors a hidden quasar. Because of low SNR and an unflagged bad diode in the FOS/BL array at the redshifted MgII line, this result needs to be confirmed. ------------------------------------------------------------------------------------ Observations Description ------------------------ We already have a spectrum under virtually identical conditions (Fig. 1), so it's reliable to go by that. The throughputs are a little lower now, but less of the (spatially extended) target will be outside the observing aperture with Costar. These are compensating (\\ltwid 20\\%) effects. Our target is spatially extended and complex, so we will use an offset star accurately measured at 2.4 * 10^-15 ergs/cm^2sAngstrom\\ on our FOC image (GASP v=12.2). Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 6505( 8) - 03/27/96 16:11 - [ 2] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 CYG-A-OFFSET STAR, K III-I RA=19H 59M 26.04S+/-.05S, J2000 V = 12.2+/-.3 DEC=40D 43' 52.21"+/-.5" F(3460)=2.4+/-.6e-15 2 CYGNUS-A GALAXY, Radio Galaxy RA=19H 59M 28.47S+/-.05S, J2000 V = 15.1 DEC=40D 44' 02.21"+/-.5" F(3460)=5.0+/-2.0e-17 Comments: SE Component of a double nucleus 6505( 8) - 03/27/96 16:11 - [ 3] Visit: 01 Visit Requirements: ORIENTation 113D TO 143D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 CYG-A- FOS/RD ACQ/BIN 4.3 MIRROR 1 1S ONBOARD ACQuisition FOR 2 OFFSET ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 CYGNUS-A FOS/RD ACCUM 4.3 G270H 1 240M ------------------------------------------------------------------------------------------------------------------------------------ 6505( 8) - 03/27/96 16:11 - [ 4] Summary Form for Proposal 6505 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/RD ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/BINARY ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category AGN ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENTation 113D TO 143D ONBOARD ACQuisition FOR 2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G270H ------------------------------------------------------------------------------------------------------------------------------------ Target Names CYG-A-OFFSET CYGNUS-A ------------------------------------------------------------------------------------------------------------------------------------