README web version of /home/usg/OPS/MTS/readme_xml/readme_81010500

Principal Investigator Email Address

• bvollmer@newb6.u-strasbg.fr

Estimated Total Execution Time (hours, including overheads)

• 31:48:16.000

General Description

• Our targets are 4 galaxies in the Virgo cluster. Ordered list :
  Priority	Galaxy		RA		DEC
  1		NGC4569		12 36 49	13 09 46
  1		NGC4402		12 26 07	13 06 46
  2		NGC4501		12 33 40	09 10 39
  2		NGC4522		12 27 45 	13 00 32
  
  Each galaxy is observed through grism 600B at two positions, an INNER position
  and an OUTER position: the aim is to compare properties at these positions.
  In other words: the science purpose cannot be reached if only one of the two 
  positions is observed.
  
  Slit positioning is based on the compared morphologies of optical and radio
  wavelengths images, i.e. features that are not seen on the optical finding
  charts. Therefore, the OBs use blind offsetting from a nearby star.
  
  Observations of one galaxy should be finished (2 positions, INNER and OUTER, 
  for each target) before the observations of the next galaxy.
  
  Notes about positioning (galaxy observations):
  
  - In general, slit positioning to 1-2 arcsec is sufficient for the galaxy 
  observations. Therefore we requested no pre-imaging.  
  
  - Our galaxy OBs proceed as follows :
    FORS1_lss_acq_fast targets a star near the galaxy of interest
    FORS1_lss_obs_slit_fast performs a blind offset that places the galaxy area
       of interest on the slit (but not necessarily at the final Y position
       along the slit)
    FORS1_lss_obs_off_fast performs a series of observations with the galaxy
       positioned alternatively at two Y positions along the slit. The purpose
       of this nodding is good sky subtraction and improved fringe correction.
       For small targets, the two positions are both on the master CCD chip.
       For larger targets, the galaxy is positioned alternatively on the
       master (upper) CCD chip and on the other chip.
  
  Two finding charts are attached to each OB. The first (*_offset.jpg) shows
  the slit positions with respect to the reference star. The second finding
  chart (*slit_position.jpg) shows the slit positions on the target.
  
  We provide 3 OBs for extra observations of the spectrophotometric standard Feige
   67 
  (see sections on Time Critical Aspects and on Special Calibration Information).

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• No critical constraints.

Time-Critical Aspects

• Observations of one galaxy should be finished (2 positions, INNER and
   OUTER, 
  for each target) before the observations of the next galaxy.
  
  We provide 3 OBs for extra observations of the spectrophotometric standard 
  Feige 67. 
  
  One must be observed in the FIRST night of our programme execution,
  just before or just after the very first galaxy OB. 
  
  The second one should be observed in the SECOND night of our programme 
  execution, again just before or after a science OB.
  
  The third one should be observed in similar conditions IF science OBs are 
  executed after a long time interval (e.g. first two galaxies in April, 
  other two galaxy in May).

Special Execution Requirements

• ---(Empty)---

Special Calibration Information

• Additional spectrophotometric standard observations:
    We provide 3 OBs for observations of a selected spectrophotometric
    standard near the Virgo cluster: Feige 67 (type Op, V=12.1, B=11.7).
    In these OBs, we observe the star through the same slit as the galaxies,
    but with the slit vertical on the sky (parallactic angle). The star is
    observed at two positions on the master CCD chip and at two positions
    on the other chip.

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 ?

• YES

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 ?

• YES

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 ?

• YES

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