README web version of /home/usg/OPS/MTS/readme_xml/readme_81500403

Principal Investigator Email Address

• rschulz@rssd.esa.int

Estimated Total Execution Time (hours, including overheads)

• 2.5 hours

General Description

• Long slit spectroscopy and broad band B, V, R & I imaging of Comet
   67P/Churyumov-Gerasimenko. As this is a moving target the actual position, differential
   tracking rates and slit orientations must be obtained from the attached ephemeris
   files for the exact time of observation. Please be aware that the listed expected
   brightnesses are total magnitudes of an extended object and the central condensation
   might appear up to 5 magnitudes fainter. The comet should nevertheless be easily
   discernible on the acquisition images requested for the spectroscopy OBs when compared
   to the usual DSS-based finding charts, therefore no additional finding charts are
   necessary. The accuracy of the given ephemeris is sufficient to allow fast acquistion
   in all OBs. As all OBs refer to the same target they could in principle be executed
   consecutively according to the given priority. Due to the viewing geometry the target
   can in September be followed during almost the whole night, with a preference for
   first half of the night. We would like to have all OBs executed during the same
   night, or at if that is not possible on consecutive nights. As we need spectra of
   a solar analogue star (taken with the same instrumental setup as the comet) in addition
   to ESO's standard calibration plan, we included an appropriate observing block named:
   CAL_SolAna_cg67p_lss. This part D of the programme should be executed somewhen between
   September 8th and 24th, however, this is not a critical time constraint.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• none

Time-Critical Aspects

• As we would like to monitor the changes in the coma of this comet as it
   comes ever closer to the sun, we need to sample its orbit about every four to six
   weeks. Therefore this part C of programme 281.C-5004 should be executed sometime
   between September 8th and 24th. This is not a critical time constraint however.

Special Execution Requirements

• Please observe that to apply a rotator offset angle is only necessary
   for the spectra of the comet! For the images the rotator must be in its default
   position (as indicated in the respective OBs).
  
  Just like during the previous run of this programme it might be necessary, due to
   better than expected seeing and/or object-brightness, to adjust the exposure times
   in order to avoid overexposure at the opto-centre of the target.
  
  As all OBs refer to the same target they could in principle be executed consecutively
   according to the given priority. However, due to the viewing geometry the target
   can be followed in september during almost the whole night with a clear preference
   for the first half of the night. We would therefore like to have all OBs executed
   during the same night, or if that is not possible on consecutive nights.

Special Calibration Information

• Other than the included OB named CAL_SolAna_cg67p no additional calibrations
   other than already performed under the standard calibration plan are necessary.

ToO Information

• ---(Empty)---

ToO Activators List

• ---(Empty)---

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• ---(Empty)---

Source(s) of Pre-imaging

• ---(Empty)---

Pre-imaging sources not listed above

• ---(Empty)---

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

• YES

If this is a pre-imaging run, did you select PRE-IMAGING for the Observing
 Category for each Observing Template ?

• N/A

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

• N/A

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 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?

• YES

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

• YES

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

If you have prepared your finding charts with tools other than FIMS,
 do they comply with the specifications on the FORS1 Phase 2 web page ?

• N/A