README web version of /home/usg/OPS/MTS/readme_xml/readme_84009300

Principal Investigator Email Address

• Paul.Crowther@sheffield.ac.uk

Estimated Total Execution Time (hours, including overheads)

• 7

General Description

• MOS spectroscopy of Wolf-Rayet stars in NGC 300,including the candidate
   WR + black hole binary NGC 300 X-1 (WR41 from Schild et al. 2003). Primary science
   goal is to verify that the WR star (Crowther et al 2007) is a genune member of the
   32.8 hr period binary NGC300 X-1 (Carpano et al. 2007) and provide a radial velocity
   curve for the HeII 4686 line in the WR star, from which a mass estimate for the
   candidate black hole can be established.
  
  Secondary goals are to use MOS spectroscopy to confirm photometric WR candidates
   from Schild et al. (2003) and Crowther et al. (2007). Resubmission of 382.D-0662(A)
   which was approved at Priority B but not executed.
  
  We require a total of ten identical 25min exposures, with 2 exposures per night
   (separation 4 hr or 1/8 orbital period) ideally spaced over 5 consecutive nights
   for the required phase coverage. Observing conditions are not severe on purpose.
   All OB's and finding charts (ngc300-mos1, ngc300-mos10) are identical - FIMS MOS
   masks produced using FORS2 images obtained in Sep 2002 using narrow-band HeII 468nm
   filter. Target is observable for 5+ consecutive hours per night at airmass below
   1.5 until mid-Nov 2009 - see below:
  
  Shown: local eve. date, moon phase, hr ang and sec.z at (1) eve. twilight,
  (2) natural center of night, and (3) morning twilight; then comes number of
  nighttime hours during which object is at sec.z less than 3, 2, and 1.5.
  Night (and twilight) is defined by sun altitude < -18.0 degrees.
  
   Date (eve) moon      eve            cent           morn     night hrs@sec.z:
                      HA  sec.z      HA  sec.z      HA  sec.z    <3   <2   <1.5
  
  2009 Aug 5    F   -9 01  down    -3 50   1.6    +1 20   1.1   6.9   6.0   5.0 
  2009 Aug 19   N   -8 01  down    -2 57   1.3    +2 06   1.2   7.7   6.8   5.8 
  2009 Sep 3    F   -6 57  13.1    -2 03   1.1    +2 52   1.3   8.4   7.5   6.5 
  2009 Sep 18   N   -5 53   3.6    -1 09   1.1    +3 35   1.5   9.1   8.2   7.2 
  2009 Oct 3    F   -4 47   2.1    -0 15   1.0    +4 17   1.8   9.1   8.9   7.3 
  2009 Oct 17   N   -3 44   1.5    +0 37   1.0    +4 57   2.2   8.7   8.4   7.3 
  2009 Nov 2    F   -2 29   1.2    +1 38   1.1    +5 45   3.3   8.0   7.1   6.1 
  2009 Nov 16   N   -1 21   1.1    +2 35   1.2    +6 31   6.3   6.9   6.0   5.0

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• None

Time-Critical Aspects

• We require well space observations (ideally 2 OBs/night,  separated by
   a minimum of  4hrs or 1/8 of the orbital period) ideally over a period of 5 consecutive
   nights to establish the radial velocity curve of the WR star and so provide a mass
   estimate for the candidate BH, The
  target is available for 5 consecutive hours per night at airmass below 1.5 until
   mid-Nov 2009
  (see table in general description)

Special Execution Requirements

• 2 observations of 25 min each, per night, separated by a minimum of 4
   hours (1/8 orbital period), ideally over 5 consecutive nights to provide the necessary
   phase coverage. On purpose, bserving conditions are not severe.

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

• FORS2

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 ?

• N/A