README web version of /home/usg/OPS/MTS/readme_xml/readme_60944100

Principal Investigator Email Address

• tayyaba@dark-cosmology.dk

Estimated Total Execution Time (hours, including overheads)

• 1.2

General Description

• The purpose of the observation is to observe the double QSO0151+048A+B.
  The coordinates are:
  
  RA(2000.0) = 01 53 53.9
  Dec(2000.0) = +05 02 57
  
  The magnitudes are about R=17.5 and R=20.8 so an acq. exposure time of a few sec
  should be enough.
  
  We would like to observe the field with two different position angles:
  
  1) PA=41.2 EofN, 16 min exposure time
     In this observation the slit covers both QSOs in the pair.
     Acquire on the brightest QSO in the pair.
  
  2) PA=98.0 EofN, 35 min exposure time
     In this observation the slit covers extended Lyman-alpha emission extending
     from QSO A.
     Acquire on the brightest QSO in the pair.
  
  An OB has been made for each PA.
  
  The science goals are : 1) to measure the systemic redshifts of both quasars, 2)
   to detect emission from a intervening DLA (already detected in Lyman-alpha previously),
   3) to detect more absorption lines from the DLA absorber to better constrain in
   state of chemical evolution.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• Note that Lyman-alpha at this redshift (1.93) is very blue: lambda observed
   = 356 nm.
  
  This is particularly relevant for the OB PHL1222_PA98.0EoF, since no previous spectrum
   covering Lyman-alpha exists for this PA (postion angle).
  
  Hence, low airmass and dark time would be very beneficial.

Time-Critical Aspects

• None

Special Execution Requirements

• None

Special Calibration Information

• Standard calibrations are sufficient

ToO Information

• N/A

ToO Activators List

• N/A

Do all your OBs comply with the instrument-specific requirements listed
 on the instrument-specific Phase 2 web page ?

• YES

Do all your finding charts comply with both the general and instrument-specific
 Phase 2 Web Pages ?

• YES

If you submitted OBs for standard stars, did you specify the magnitude
 and spectral type of all standard stars in the OBs ?

• N/A

Have you specified the S/N ratio at given wavelength in the User Comments
 field of each OB?

• N/A

Have you included OBs for any calibrations that you need but which are
 not part of the Calibration Plan ?

• N/A

If you are observing Moving Targets, have you attached suitable ephemeris
 files to your OBs?

• N/A

If you have preferences which OBs should be executed first, did you make
 use of the User Priority field in the OBs ?

• N/A

If this is a run that requires coordinated observations with other facilities,
 did you give proper instructions in the Time-Critical Aspects Section ?

• N/A