README web version of /home/usg/OPS/MTS/readme_xml/readme_79034211

Principal Investigator Email Address

• ehrenreich@iap.fr

Estimated Total Execution Time (hours, including overheads)

• 02h11m45s

General Description

• We are searching for the absorption signatures of gas clouds produced
   by
  sublimating comets grazing the white dwarf GD56. We focus on the Ca II doublet stellar
   lines around 393 nm and 397 nm, and try to evidence extra absorptions around those
   two lines. These absorptions should be both variable in wavelength/radial velocity
   and intensity in the vicinity of the stellar lines. We expect the cometary absorptions
   to be around 10% of the stellar line intensity. We aim at obtaining a S/N of 30-50
   with a resolution of 3 km/s, in order to have a 10-sigma detection.

Waiver Requests

• (Waiver request on the 7/2/7, granted on the 8/2/7)
  I would like to program five separated blocks of 2.2h continuous observations. I
   would need to set five 2.2h-long OBs (runs K to O), with each of them exceeding
   the 1h limit. The reason why I need contiguous observations is that I am looking
   for a spectroscopic transient absorption, which timescale is of a few hours. In
   case I split one run in 2 or 3 non-contiguous OBs (for instance, one 1h-OB taken
   one night and another 1h-OB another night), the event could be seen in one OB and
   not in the others, resulting in a non- or bad detection. I therefore ask for waivers
   for runs K to O, allowing to set five 2.2h-long OBs.

Critical Observing Condition Constraints

• None.

Time-Critical Aspects

• We need that each OB (or each Run in our case) be scheduled some nights
   apart (i.e., no more than one OB per night). However, they can be randomly scheduled
   and do NOT need to be programmed over contiguous nights.

Special Execution Requirements

• ---(Empty)---

Special Calibration Information

• ---(Empty)---

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 ?

• 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 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

If you need secondary guiding, are there suitable objects within 30 arcsec
 from your target ?

• N/A