README web version of /home/usg/OPS/MTS/readme_xml/readme_81005100

Principal Investigator Email Address

• stephane.corbel@cea.fr

Estimated Total Execution Time (hours, including overheads)

• 5

General Description

• The goal of the program is to obtain spectra of the optical counterpart
  of the ultraluminous X-ray source (ULX) in NGC 5408.  The counterpart
  was identified using images from HST/WFPC2 as a V=22.4 mag star at
  14:03:19.619, -41:22:58.54 (J2000).  
  
  FORS1 will be used with the  GRIS_600B grism and a long slit to obtain
  spectra covering the 375-500 nm range.  The slit is oriented so that the
  closest neighbors of the  ULX counterpart are best seperated along the
  slit.  The slit will also cover a bright star at 14:03:18.960,
  -41:22:56.52 (J2000).  Each OB consists of aquisition of the target
  followed by 3 science exposures to obtain spectra with integrations of
  850 seconds each.  
  
  Two finding charts are attached.  find_dss_red.jpg is made from a DSS
  red image and covers the whole FORS1 field of view; however, the target
  is not visible.  find_hst.jpg is made from an HST/WFPC2 F606W (V-band)
  image.  It covers a smaller field of view, but the target is visible.
  
  There are 5 identical OBs.  The OBs should be spread over at least two
  different nights in order to provide some check of the variability of
  the spectrum.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• Good seeing, 0.8 arcsec or better, and not bright skys are needed since
   we are measuring the spectrum of a rather dim object (V = 22.4).

Time-Critical Aspects

• The OBs should be spread over at least two different nights.

Special Execution Requirements

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Special Calibration Information

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ToO Information

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

• YES