README web version of /home/usg/OPS/MTS/readme_xml/readme_77075800

Principal Investigator Email Address

• perni@astro.uni-bonn.de

Estimated Total Execution Time (hours, including overheads)

• 12 h

General Description

• We intend to spectroscopically verify the reality of a non-luminous mass
   concentration (sim 2x10^14 M_sun) at 0.1 < z < 0.3 as detected by weak gravitational
   lensing observation. The existence of such an object, usually referred to as dark
   clump, is controversial and highly debated. Dark clumps might not be real (statistical
   fluke), but the striking possibility that spectroscopic analyses could lead to reliable
   constraints on the existence of such objects, and the increasing evidences of the
   existence of dark galaxies from HI-surveys (Minchin et al. 2005), should outweigh
   such concerns. We propose to observe the quasar 004345.8-294733 (V=19m57; z=1.675),
   3'9" off the dark clump candidate SSMC-007, with VLT/UVES, in order to search for
   gas associated with SSMC-007. The proposed observations will enable (1) to confirm/infirm
   the existence of SSMC-007, and (2) if real, to study important absorption lines
   such as MgI and MgII, CaII, MnII, and FeII.

Waiver Requests

• Waiver request Jan 20, 2006: We intend to obtain a UVES spectrum from
   the QSO 004345.8-294733 (V=19.57mag, z=1.675). [...] As our target object is faint,
   it would be most helpful to have longer exposure times in order to circumvent difficulties
   in extracting low signals from the blue camera. We therefore request a phase 2 waiver
   in order to be able to exceed the execution time limit of 1h. We ask for 5576s exposure
   time for each of the seven OBs. This will lead
  to a total exposure time of 10:50:32 and a total execution time of 11:59:57. 
  
  Waiver was granted Jan 23, 2006: your waiver has been granted, with the restriction
   that if the conditions degrade in violation of the constraints after the first hour,
   the OB will not be repeated. (Ferdinando Patat, ESO)

Critical Observing Condition Constraints

• none

Time-Critical Aspects

• none

Special Execution Requirements

• Guide camera: BLUE (as specified in the OBs)
  Execution Time 5576 sec (as specified in the OBs)

Special Calibration Information

• none

ToO Information

• none

ToO Activators List

• none

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• none, object is well defined by finding cart

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 need secondary guiding, are there suitable objects within 30 arcsec
 from your target ?

• N/A