README web version of /home/usg/OPS/MTS/readme_xml/readme_80025700

Principal Investigator Email Address

• boehnhardt@mps.mpg.de

Estimated Total Execution Time (hours, including overheads)

• 14h

General Description

• Science program on a moving target.
  
  SCIENCE PROGRAM: We propose to obtain high-dispersion spectra of the gaseous coma
   of a comet brighter than 
  9 mag, using CRIRES in 8 different wavelength ranges in order to detemine the gas
   production of H2O, HCN, 
  NH3, C2H2, C2H6, CH3OH, H2CO, CO, the D/H ratio and the ortho-para ratio for H2O,
   NH3, C2H2. A flux 
  standard is measured for the absolute calibration of the spectra.
  
  PRIORITY: The priority of OB execution is given in field user priority. It may be
   modified 
  through the ToO trigger information
  
  OBJECT INFORMATION: Will be provided with the ToO trigger information.
  
  INSTRUMENT SETUP: For the comet 0.4 arcsec slit width is used, for the standard
   star 0.8 arcsec 
  (waiver granted), all cases in elev mode. The reference wavelenghts used differ
   from the standard 
  settings listed in the manual (waiver granted).
  
  AO INFORMATION: Please, try to close the AO loop, since any AO support will improve
   the SNR in the 
  comet spectra. Any improvement in Strehl is welcome. If the AO loop cannot be closed,
   please run 
  the OB in open loop.
  
  OBSERVING STRATEGY: The OB execution should be performed according to user priority
   information unless
  indicated differently in the ToO trigger information. It is advantageous for the
   science goals of the
  program to perform as many OBs as possible in a single night.
  
  CALIBRATIONS: Apart from the usual calibrations according to the CRIRES calibration
   plan we ask for
  the performance of one OB (TOO_FLUX_STAR) for the measurement of a flux standard
   star. This OB 
  uses a 0.8 arcsec slit (waiver granted) and contains all wavelength settings used
   in the course 
  of this ToO program. It should be executed at least once under CLR sky conditions
   and ideally 
  during a night when the ToO comet target is observed as well. 
  
  OB NAMING CONVENTION: The OB names contain MOV to indicate a moving target, and
   the central 
  wavelength to be measured.
  
  EPHEMERIS FILE: Will be provided with the ToO trigger information.
  
  FINDING CHARTS: No finding charts will be provided since the comet is expected to
   be bright (<9mag).
  
  Cook instructions for OB esecution:
  ===================================
  - select OB according to user priority
  - check requirement for enviromental conditions (CLR, moon phase/distance)
  - in OB enter RA and DEC from target ephemeris that are closest in time to the expected
   start time of the OB
  - in OB enter differential velocity in RA and DEC from target ephemeris that are
   closest in time to the 
  expected start time of the OB.
  - perform preset, AO and slit acquisition; if AO cannot be close, work in open loop.
  - perform spectroscopy
  - check whether flux standard star OBs (TOO_FLUX_STAR_A and TOO_FLUX_STAR_B) is
   performed, if not, try to execute it asap

Waiver Requests

• - non-standard wavelenght settings (using to get optimized coverage of
   cometary emission lines)
  - 0.8 arcsec slit width for flux standard star measurement
  
  Both waiver requests are granted.

Critical Observing Condition Constraints

• Clear sky is required.

Time-Critical Aspects

• Time critical aspects will be given in the trigger note.

Special Execution Requirements

• ---(Empty)---

Special Calibration Information

• Flux calibration OB must be executed at similar sky conditions as comet
   (CLR)

ToO Information

• This is a ToO program on a moving target. Ephemeris of the comet, coordinates
   of the flux standard stars 
  and any information on OB execution will be provided with the ToO trigger.

ToO Activators List

• H. Boehnhardt, boehnhardt@mps.mpg.de
  M. Lippi, lippi@mps.mpg.de

Do the README file and the instrument comments of the telluric stars
 OBs include the required S/N/pixel of the spectrum of the telluric star, its spectral
 type and allowed spectral range?

• N/A

Do any OBs include wavelength or flatfield calibrations?

• NO

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

• N/A

If the slit viewer guide star is different from the target, are the RA
 and DEC offsets accurate to within 0.05 arcsec and do they take into account the
 relative proper motion between the two objects?

• N/A

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

• YES