6432( 6) - 03/13/96 07:25 - [ 1]
PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only
ID: 6432
Version: 6
Check-in Date: 13-Mar-1996
07:22:47
1.Proposal Title:
Ly-alpha forest clouds at intermediate redshifts z=0.8 to 1.4 in the new double QSO
HS 1216+5032
------------------------------------------------------------------------------------
2. Scientific Category 3. Proposal For 4. Cycle
QSO Absorption Lines GO 6
------------------------------------------------------------------------------------
5. Investigators
Contact?
PI: Prof. D. Reimers Hamburger Sternwarte
CoI: Dr. H.-J. Hagen Hamburger Sternwarte Y
CoI: Dr. J. Bergeron European Southern Observatory, Munich N
CoI: Dr. A. Smette University of Groningen N
------------------------------------------------------------------------------------
6. Abstract
We propose to observe spectroscopically both components of the new double QSO HS
1216+5032 (z=1.43, d=9.1") with the FOS in high resolution in the range 2200 to
3270Angstrom with the aim to measure transverse dimensions of Ly-alpha forest clouds
in the in this respect unexplored redshift range z=0.8 to 1.4 for which this QSO
pair is an excellent target with a linear separation of 80 h_50^ -1 kpc. This double
QSO recently discovered by the Hamburg survey is particularly well suited for a Ly-
alpha forest study since it samples Ly-alpha clouds on a scale slightly smaller than
the expected characteristic cloud sizes. Identification and spectroscopy of possible
parent galaxies at z~1 from the ground combined with FOS data will yield 2-
dimensional information on Ly-alpha clouds for the first time.
------------------------------------------------------------------------------------
6432( 6) - 03/13/96 07:25 - [ 2]
Observations Description
------------------------
We propose to take high-resolution spectra of both components with the FOS
G270H. With an estimated flux >= 10^-15 erg/cm^2/s/Angstrom at 2400Angstrom for
component A a S/N>=20 is reached in 22 min for Lambda>2400Angstrom (1 orbit). ,
Component B is about a factor of 6 to 7 fainter than A which requires about 140
min. exposure time or 4 orbits. Altogether 5 orbits are necessary to cover both
objects with a S/N>=20 for Lambda>2400Angstrom.
Real Time Justification
-----------------------
None. Medium resolution spectroscopy with DeltaLambda~2Angstrom covering the
optical from 3300 to 6700Angstrom will be conducted with the Calar Alto 3.5m
telescope (accepted for March 96). Deep imaging and spectroscopy of the QSO
environment will be applied for at the CFHT 4m telescope for spring 96 (J.
Bergeron).
Calibration Justification
-------------------------
Additional Comments
-------------------
------------------------------------------------------------------------------------
Data Distribution
Media: 8MM
Blocking Factor: 10
Ship To: PI_Address
Ship Via: UPS
Email: ,
------------------------------------------------------------------------------------
6432( 6) - 03/13/96 07:25 - [ 3]
TARGET LIST a) Fixed Targets
------------------------------------------------------------------------------------------------------------------------------------
Tar| Target | Target | Target |Coord | Radial | Flux data
No | Name | Description | Position |Eqnx | Vel. |
------------------------------------------------------------------------------------------------------------------------------------
1 HS- GALAXY,QSO, RA=12H 18M 41.12S +/- J2000 Z = 1.45 B = 17.0
1216+5032A 0.05S,DEC=50D 15' 36.4" +/- F(3000)=10+/-3e-16
0.5", PLATE-ID=00LK
2 HS- GALAXY,QSO, RA=12H 18M 40.62S +/- J2000 Z = 1.45 B = 19.0
1216+5032B 0.05S,DEC=50D 15' 44.2" +/- F(3000)=2+/-1e-16
0.5", PLATE-ID=00LK
6432( 6) - 03/13/96 07:25 - [ 4]
Visit: 10
Visit Requirements: <none>
On Hold Comments: <none>
Additional Comments: <none>
Exposures
------------------------------------------------------------------------------------------------------------------------------------
Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special
Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements
------------------------------------------------------------------------------------------------------------------------------------
11 HS- FOS/RD ACQ/BIN 4.3 MIRROR 1 12S ONBOARD ACQ FOR 12-19
1216+5032A ARY
------------------------------------------------------------------------------------------------------------------------------------
12 HS- FOS/RD ACCUM 4.3 G270H 1 33M
1216+5032A
------------------------------------------------------------------------------------------------------------------------------------
19 HS- FOS/RD ACCUM 4.3 G270H 1 183M
1216+5032B
------------------------------------------------------------------------------------------------------------------------------------
6432( 6) - 03/13/96 07:25 - [ 5]
Summary Form for Proposal 6432
Item Used in this proposal
------------------------------------------------------------------------------------------------------------------------------------
Configurations FOS/RD
------------------------------------------------------------------------------------------------------------------------------------
Opmodes ACQ/BINARY ACCUM
------------------------------------------------------------------------------------------------------------------------------------
Proposal Category GO
------------------------------------------------------------------------------------------------------------------------------------
Scientific Category QSO Absorption Lines
------------------------------------------------------------------------------------------------------------------------------------
Special Requirements ONBOARD ACQ FOR 12-19
------------------------------------------------------------------------------------------------------------------------------------
Spectral Elements MIRROR G270H
------------------------------------------------------------------------------------------------------------------------------------
Target Names HS-1216+5032A HS-1216+5032B
------------------------------------------------------------------------------------------------------------------------------------