README web version of /home/usg/OPS/MTS/readme_xml/readme_76045001

Principal Investigator Email Address

• gdemarchi@rssd.esa.int

Estimated Total Execution Time (hours, including overheads)

• 12

General Description

• The purpose of this programme is to obtain low-resolution spectra of pre
   main sequence (PMS) stars in the young star forming cluster R136 (30 Dor) in the
   LMC.
  
  The target coordinates identify a region located about 6 arcsec WNW of the centre
   of R136 where the SPIFFI field of view will be located (see finding chart). This
   region has been observed with the HST in the visible and near infrared and is known
   to contain several PMS stars that we intend to study. 
  
  The AO reference star (marked R1 in the finding charts) is Melnick 42 (aka Brey
   77), a O3 star of Wolf Rayet type WN with magnitudes: B=10.98, V=10.96, R=10.85,
   J=10.77, H=10.70, K=10.69. The reference star is located 5" away from the centre
   of the target field and does not fall within the FOV of SPIFFI for an of the planned
   jitter offsets. The brightest star that might fall within the SPIFFI FOV for some
   of the random autojitter offsets is RMC 134 (aka Brey 75), a Wolf Rayet WN star
   with magnitude about 12 in V, J and H. All other objects are at least 1 mag fainter.
   None of the objects (NGS or target) is brighter than the 10th magnitude in the NIR.
   To summarise:
  
  OB names        R(NGS)     target       separation         comment
  ---------       ------     ----------   ----------------   -----------------------
  R136-HK-*       10.85      H>12, K>12   average 5 arcsec   goal is stars with
   H=19 
  ---------       ------     ----------   ----------------   -----------------------
  
  All OBs are identical and can be executed in any order. Each OB consists of an acquisition
   template to acquire the R1 star. Since R1 is bright (R=10.85), sky subtraction is
   not necessary. Please note that the position angle of SPIFFI throughout the entire
   OB is not zero, rather -37.8, as clearly indicated in the OB and finding chart.
   The largest SPIFFI FOV (8 arcsec on a side) is used throughout the whole run with
   platescale of 250 mas/pixel.
  
  Following acquisition, the telescope is slewed to the target field and a sequence
   begins of the type ABBAAB. The value of DIT is 300 sec and NDIT is 2 for the target
   and 1 for the sky. The sky is located about 25 arcsec ESE of the target, in a region
   devoid of stars. A small dithering pattern is used around the position of the target
   in order to overcome cosmetics and flat fielding problems.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• None

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 ?

• 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

Did you indicate the magnitude of the brightest object in the field in
 each SINFONI OB?

• N/A

If you are using the AO: Did you indicate for every OB the magnitude
 of the guide star, and its distance to the target (if any)?

• YES

If you submitted OBs for standard stars, did you use the provided StandardStar
 templates?

• N/A

If you are using a specific offset pattern or position angle: did you
 check carefully the definition in the manual?

• YES

Did you make really sure that none of your OBs ever saturates the detector?

• YES

If you are using the AO: did you enter the correct Strehl Ratio (on-axis,
 K-band) AND the seeing value in the constraint set?

• YES