README web version of /home/usg/OPS/MTS/readme_xml/readme_79023900

Principal Investigator Email Address

• klein@science.uva.nl

Estimated Total Execution Time (hours, including overheads)

• 14

General Description

• We want to perform optical photometry of 13 faint persistent X-ray sources
   in the Galactic bulge of which very little is known. With the accurate positions
   we will obtain from scheduled Chandra and XMM observations we are capable of identifying
   possible optical counterparts. The photometry in the V, R, I and H_alpha bands will
   allow us to distinguish between low- and high mass X-ray binaries and accreting
   white dwarfs. 
  
  All 13 objects have optimum observing conditions (airmass of 1.3 or less) in the
   period from end of April to mid August 2007 and we gave user priority (1 or 2) based
   on the estimates of the interstellar extinction giving priority 2 for the sources
   with relatively higher extinction estimates. Finding charts are provided for a 10
   * 9.5' field centered around the source, with the source-circle havinig a radius
   of 30".

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• none

Time-Critical Aspects

• none

Special Execution Requirements

• ---(Empty)---

Special Calibration Information

• For each source the long OBs consist of 3 exposures of 10 min for the
   V, R and I bands and one exposure of 15 min in the Halpha band, all requiring CLEAR
   nights or better. The photometric calibration observations for bands V, R and I
   are presented in the short OBs; for each band we require 1 min with Photometric
   conditions. In case the long OBs are taken on Photometric nights, no calibration
   is required. For Halpha we do not require the photometric calibration: measuring
   any excess of Halpha emission is sufficient for our scientific aims at this point.

ToO Information

• ---(Empty)---

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 ?

• YES

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