README web version of /home/usg/OPS/MTS/readme_xml/readme_79063200

Principal Investigator Email Address

• sven.derijcke@UGent.be

Estimated Total Execution Time (hours, including overheads)

• 10h

General Description

• Run 079.B-0632(A) consists of 8 OBs, named "VCC128 longslit 1200B" up
   to "VCC128 longslit 1200B-7", which are all duplicates of each other. The goal is
   to obtain longslit spectra of the dwarf galaxy VCC128 with the FORS1/1200B grism.
   This galaxy contains a double nucleus. The two nuclei are separated by 0.4" and
   will from the ground hardly be resolved (if at all) and will appear as a single
   bright nucleus. The slit should be put on the nucleus and rotated over a PA=54 degrees
   (N over E, so Rotator on Sky is set to -54 degrees) so that it covers both nuclei
   (we want to see the rotation velocity of the two nuclei). These OBs are duplicates
   of each other and differ only in the applied small offsets that are intended to
   move the galaxy spectrum slightly up and down the slit to facilitate the correction
   for any bad pixels. The first offset is always positive and of the order of 20"
   (so the galaxy should move upwards along the slit by ~20"!!!). If possible, please
   check using a through-slit image if the galaxy nucleus is still on the slit. The
   idea is to move the galaxy at least 50" away from the gap on the top CCD. That should
   be sufficient for this small and faint galaxy.
  
  Each "VCC128 longslit 1200B" OB has 2 finding charts attached to it. One is a coarse
   DSS image with the FORS1 field of view (079.B-0632B.lss1.jpg), showing the position
   of the galaxy and the spectrograph slit. The other (079.B-0632B.lss2.jpg) is a zoomed-in
   HST/WFPC2 image with the double nucleus indicated by a circle. 
  
  There are also 5 OBs for longslit spectroscopy (using exactly the same setup as
   for the galaxy) of the stars HD149661, HD064606, HD136028, HD095272, and HD125454.
   These will serve as Lick standards and as velocity templates. For the acquisition
   image, I inserted a U-filter because these Lick stars are very bright. In the finding
   charts, the target is always the bright star in the middle of the image. I aimed
   the CCD always 1.5' south of the star so as to bring it to the center of the top
   CCD.
  
  The idea is for all science data to be in the top CCD. With such a small dwarf galaxy,
   that should be doable.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• condition constraints as detailed in the Constraint Set of the OBs
  
  VCC128 longslit 1200B:
  Clear, 0.8" FWHM seeing, 2.0 airmass, 0.5 lunar illumination, 60 degrees moon distance
  
  HD**** longslit :
  Variable, thin cirrus, 2.0" FWHM seeing, 3.0 airmass, 1.0 lunar illumination, 60
   degrees moon distance

Time-Critical Aspects

• none

Special Execution Requirements

• none

Special Calibration Information

• none

ToO Information

• none

ToO Activators List

• none

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• none

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 ?

• N/A