README web version of /home/usg/OPS/MTS/readme_xml/readme_81083901

Principal Investigator Email Address

• dnuernbe@eso.org

Estimated Total Execution Time (hours, including overheads)

• 10.0

General Description

• *************************************************************************
   
  NOTE ADDED IN PROOF (2008-08-07): Based on recently obtained SINFONI data 
  the center position of the science target = center of the silhouette disk 
  has been re-determined, and the coordinates of the science target in the 
  10 CRIRES OBs have been corrected accordingly. The correct coordinates of 
  the science target (i.e., center of the silhouette disk) are now 
  RA = 18:20:26.189 , DEC = -16:12:10.490 !!! 
  In addition, a new SVGS has been selected which is different from the NGS 
  and which is marked in the revised Finding Charts. 
  In the revised acquisition template of the CRIRES OBs, the relative offset 
  between this new SVGS and the science target is specified. 
  This new SVGS is much closer to the science target than the old SVGS (=NGS). 
  *************************************************************************
  
  This program aims at deep (DIT = 600sec), AO supported CRIRES observations 
  in the wavelength range 2166 +/- 1 nm (i.e., Br gamma line), using a slit 
  width of 0.4 arcsec and a slit PA of 148 degree (see Finding Charts #2 and 
  
  #3). 
  
  Since the science target, a silhouette disk (which is seen in absorption 
  against the bright background of an HII region) fills almost the entire 
  slit length, all 10 OBs use a GenericOffset template with detector (!!!) 
  offset of the order dx = +100 arcsec and dy = +/- 10 arcsec; 9 OBs employ 
  a Object-Sky-Object-Sky sequence and 1 OB employs only a Object-Sky-Object 
  sequence; all OBs taken together jitter the science target along the slit, 
  with jitter spacings of 2 arcsec. 
  
  Please note that there is a bright source (our NGS = SVGS; B=11.34, V=9.72, 
  J=6.70, H=5.95, K=5.69) at a distance of 22.7 arcsec towards the east of 
  our target (see Finding Charts #1 and #2). 
  
  Please also note that the silhouette disk and its central protostar (K~19.5) 
  are faint, most likely too faint to be identified in the acquisition images. 
  Therefore, please trust the coordinates and acquire the NGS = SVGS in the 
  slit center. 
  Once the offset to the science target has been done, please verify carefully 
  the slit orientation and slit alignment with the midplane of the silhouette 
  disk by using some nearby stars (fainter than K = 13.5) detectable in the 
  slit viewer. 
  Since we aim to trace the rotation curve of the silhouette disk, correct 
  orientation and alignment of the slit with the midplane of the silhouette 
  disk is of utmost importance! 
  In case of major discrepancies and/or problems (although not expected) in 
  slit orientation and slit alignment, please contact the PI (either directly 
  or via USD) and provide an acquisition image to the PI. 
  Thanks a lot in advance for all your efforts!

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

• N/A

ToO Activators List

• N/A

Do the README file and the instrument comments of the telluric stars
 OBs include the required S/N/pixel of the spectrum of the telluric star, its spectral
 type and allowed spectral range?

• N/A

Do any OBs include wavelength or flatfield calibrations?

• N/A

If you are observing Moving Targets, have you attached suitable ephemeris
 files to your OBs?

• N/A

If the slit viewer guide star is different from the target, are the RA
 and DEC offsets accurate to within 0.05 arcsec and do they take into account the
 relative proper motion between the two objects?

• YES

If you have preferences which OBs should be executed first for objects
 at similar RA, did you make use of the User Priority field in the OBs?

• N/A