Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 22 Report Date: 18-Jul-95:16:11 Version: ********** Check-in Date: ********** 1.Proposal Title: NEBULOSITY ASSOCIATED WITH THE NEARBY QSO MR 2251-178 ------------------------------------------------------------------------------------ 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 Dr. Joe Astronomer STSCI USA (301) 338-4700 PROFESSOR ------------------------------------------------------------------------------------ 7. Abstract Long-slit spectroscopy of the nearby QSO MR2251-178 will allow us to study the dynamics of its nuclear narrow line region and the link between this region and the surrounding ionized nebulosity, to determine the gas excitation gradients and the total column density of ionized gas. In addition the imaging mode will give the morphology of the ionized gas within the narrow line region and the inner nebulosity and will allow comparison between LyAlpha haloes of low and high redshift QSO's. ------------------------------------------------------------------------------------ 8. Scientific Key Words: QSO - INTERSTELLAR MATTER - KINEMATICS ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 4.00 par: 0 10. Num targs pri: 2 par: 0 ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 22 PI: Dr. Joe Astronomer Proposal Title: NEBULOSITY ASSOCIATED WITH THE NEARBY QSO MR 2251-178 ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Dr. Joe Astronomer SPACE TELESCOPE SCIENCE USA INSTITUTE ------------------------------------------------------------------------------------ 3. Description of proposed observations. imaging : one exposure of 3000 sec using a narrow filter centred on the Lyalpha redshifted emission line spectroscopy : three exposures, each of about 5000 sec - one along the major axis with a cut-order filter to only get the optical range (information on both the continuum and line emissions) - one along the minor axis without filter to observe the optical and the UV emission lines - one off-centred by about one (or one half) arcsec to obtain after spatial rebinning a higher S/N ratio spectrum for the ionized gas outside the BLR. This tangential spatial rebinning, along about 0.5 to 1 arcsec paralell to the minor axis, does not degrade substantially the emission line profiles and will give detailed emission line ratios (including weaker lines as [0III]Lambda 4363) and allow a search for a possible abdorption component due to the ionized of the nebulosity and outer envelope. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. Neither the narrow line region, nor the transition zone between the NLR and the nebulosity can be resolved from the ground. The kinematics, spatial distribution, density and ionization gradients of these inner ionized regions of the nearby QSO MR 2251-178 can only be studied with the ST using the long-slit spectroscopy mode of the FOC. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. Justification for realtime data or special scheduling goes here (none for this proposal). ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. Obsrvation of diffuse emission (more crucially the search of stellar absorption lines) requires a dark sky. ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. A description of your data reduction plans go here. ------------------------------------------------------------------------------------ 8. Additional comments or special requests. Any additional comments go here. ------------------------------------------------------------------------------------ 9. Description of previous HST work. A description of any previous HST data goes here. ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). Resources provided by your home institution goes here. ------------------------------------------------------------------------------------ 11. Address Information Page 3 Name: JOE ASTRONOMER Category: PI Institution: STSCI Address: 3700 SAN MARTIN DRIVE City: BALTIMORE State: MD Zip Code: 21218 Country: USA Telephone: (301) 338-4700 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 22 [ 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 MR2251-178 E,314 PLATE-ID=7TT2, 1950 Z=0.0639 EXT 1 F-LINE(1216) = 4 +/- 2 E-15 RA = 22H 51M 25.9S +/- 0.1S, 8 2 F-LINE(5007) = 5 +/- 2 E-14 DEC = -17D 50' 56.7" +/- 1" ------------------------------------------------------------------------------------------------------------------------------------ 2 MR2251-178W E,314,991 R = 1.0" , 1950 Z=0.0639 EXT 1 F-LINE(1216) = 4 +/- 2 E-15 PA = 270D , 8 FROM 1 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 22 [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 5 MR2251-178 FOC/48 ACQ 128X128 F140W 1 120S 10 1 1 ONBOARD ACQ FOR 6 -ASLIT GUID TOL 0.05"/5-9 CYCLE 1 ORIENT 350D +/- 10D ------------------------------------------------------------------------------------------------------------------------------------ 6 MR2251-178 FOC/48 SPEC 256X102 G450M 3600- PIXEL=25X25 1 2000S 20 2 1 SAME ORIENT FOR 6 4-SLIT 5300 AS 5 CYCLE 1 DARK TIME SAME POS FOR 6 AS 5 Comments: ORIENT 350D +/- 10D IS EQUALLY GOOD. ------------------------------------------------------------------------------------------------------------------------------------ 7 MR2251-178 FOC/48 ACQ 128X128 F140W 1 120S 10 1 1 INT ACQ FOR 8,9 -ASLIT CYCLE 1 ORIENT 80D +/- 10D ------------------------------------------------------------------------------------------------------------------------------------ 8 MR2251-178 FOC/48 SPEC 256X102 GRAT- 1 2000S 20 1 1 DARK TIME 4-SLIT PRISM 2 SAME POS FOR 8-9 AS 7 SAME ORIENT FOR 8- 9 AS 7 CYCLE 1 Comments: ORIENT 260D +/- 10D IS EQUALLY GOOD ------------------------------------------------------------------------------------------------------------------------------------ 9 MR2251-178W FOC/48 SPEC 256X102 GRAT- 1 2000S 5 1 1 DARK TIME 4-SLIT PRISM CYCLE 1 ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 22 [ 6] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOC/48 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ SPEC ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters PIXEL=25X25 ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 4.00 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category QUASARS & AGN ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category QUASAR EMISSION ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 6; GUID TOL 0.05"/5-9; CYCLE 1; ORIENT 350D +/- 10D; SAME ORIENT FOR 6 AS 5; CYCLE 1; DARK TIME; SAME POS FOR 6 AS 5; INT ACQ FOR 8,9; ORIENT 80D +/- 10D; SAME POS FOR 8-9 AS 7; SAME ORIENT FOR 8-9 AS 7; CYCLE 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F140W G450M GRAT-PRISM ------------------------------------------------------------------------------------------------------------------------------------ Target Names MR2251-178 MR2251-178W ------------------------------------------------------------------------------------------------------------------------------------