README web version of /home/usg/OPS/MTS/readme_xml/readme_83091600

Principal Investigator Email Address

• bouwman@strw.leidenuniv.nl

Estimated Total Execution Time (hours, including overheads)

• 05:41:10.000

General Description

• The purpose of this run is to obtain high signal to noise (S/N) spectra
   ranging from from 3300 to 6600 Angstrom on two highly extincted sources (MWC297
   and DoAr21) using the grism600B+22 on FORS2. The immediate scientific objective
   of the observations is to look for supposedly weak and broad features superposed
   on the interstellar extinction curve.
  
  The run is divided in a number of FORS2_LSS OBs for science exposure and an equal
   number of standard star exposures (indicated with _A, _B, _A_STD and _B_STD). The
   standard star exposures are preferably performed under the same conditions as the
   science exposures in order, such that a good telluric absorption removal can be
   performed.
  
  Calculations using the ESO exposure time calculator are based on an airmass of 1.0
   and 1.0" seeing. If these conditions are not fulfilled and the operator feels that
   better data can be obtained by taking longer integration times, we allow him to
   adjust the integration times.
  
  In case not all of the observations can be performed, we would like to have a full
   data set on  both targets (MWC297_A and DoAr21_A) and their accompanying standards
   (MWC297_A_STD and DoAr21_A_STD). The priorities for the OBs are indicated accordingly.
   Of course, two full data sets (_A and _B) are prefered.

Waiver Requests

• ---(Empty)---

Critical Observing Condition Constraints

• The observations should preferably be performed for seeing better than
   1.4", an airmass of less than 1.8 and a clear sky.
  
  The OBs for the standard stars should be executed at the same night as the target
   OB.

Time-Critical Aspects

• There are no time critical aspects

Special Execution Requirements

• We prepared OBs for telluric standards (e.g. DoAr21_A_STD) which should
   be taken under similar conditions (i.e. same night) as the science exposures of
   the targets under investigation (eg OB DoAr21_A).

Special Calibration Information

• The scientific goal of these observations is to find broad absorption
   features superposed on the interstellar extinction curve. In order to achieve this
   goal, we proposed to obtain high S/N absorption spectra of two highly extincted
   objects, DoAr21 and MWC297. The aim is to obtain a S/N of 500 in the blue part of
   the spectrum and, because of extinction, even higher S/N (~1500) at the red end
   of the spectral window. Hence, in order to reduce the data with obtaining high S/N
   end spectra, we kindly ask for high S/N flatfields taken during daytime calibration
   measurements.

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 ?

• YES

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

• YES