README web version of /home/usg/OPS/MTS/readme_xml/readme_84033200

Principal Investigator Email Address

• lippi@mps.mpg.de

Estimated Total Execution Time (hours, including overheads)

• 09:30:11

General Description

• SCIENCE PROGRAM: We propose to obtain high-dispersion spectra of the gaseous
   coma of a comet brighter than 
  9 mag, using CRIRES in 5 different wavelength ranges in order to detemine the gas
   production of H2O, HCN, 
  NH3, C2H2, C2H6, CH3OH, H2CO, CO. In case of a very bright target, one more setting
   will be used to determine the D/H ratio and the ortho-para ratio 
  for H2O, NH3, C2H2 as well. A flux 
  standard should be measured for the absolute calibration of the spectra.
  
  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 OBs (with the prefix CAL_TOO_STAR) for the measurement of a flux
   standard star. These OBs 
  use a 0.8 arcsec slit (waiver granted) and contain 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. 
  
  
  EPHEMERIS FILE: Will be provided with the ToO trigger information.
  
  FINDING CHARTS: Finding charts, if needed, will be provided with the ToO trigger
   information.
  
  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 OB with the same wavelength setting 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), and possibly during the same night of the observation of the target.
  If possible, flats shoud be taken with the same slit widths (0.4 and 0.8) used during
   the observations.

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

• Manuela Lippi: lippi@mps.mpg.de
  Hermann Boehnhardt: boehnhardt@mps.mpg.de
  Mike J. Mumma: Michael.J.Mumma@nasa.gov

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?

• N/A