README web version of /home/usg/OPS/MTS/readme_xml/readme_79502100

Principal Investigator Email Address

• pg@crab.riken.jp

Estimated Total Execution Time (hours, including overheads)

• 1.75

General Description

• Simple LSS of two Galactic black hole candidates, as close in time as
   possible with scheduled ULTRACAM observations of these targets in June (Chilean
   nights beginning Jun 11,12,13,15 and 17). One target to be observed once, and one
   target to be observed four times, all on different nights. A blue and a red spectrum
   are obtained consecutively.
  
  
  OBs 
  --- 
  Note that for GX339-4, four OBs are submitted. These OBs are identical, except for
   their name, and the time intervals entered in there for completeness.
  
  
  Finding Charts
  --------------
  279.D-5021A.001.jpg : GX339-4 large field of view
  279.D-5021A.002.jpg : GX339-4 zoom-in (target is expected to be bright, as on the
   left)
  
  279.D-5021A.003.jpg : SwiftJ1753 large field of view (target is invisible on this
   old DSS image, though it is now brighter than the DSS limit)
  279.D-5021A.004.jpg : SwiftJ1753 zoom-in (recent image showing the bright target)

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• None. The important aspect is to try and observe close in time to the
   ULTRACAM observations. Of course, if conditions are changing rapidly, and waiting
   an hour (say) is likely to result in much clearer skies, then please do wait a bit!

Time-Critical Aspects

• These targets are variable, and we have a dedicated program to obtain
   rapid photometry with ~10 ms time resolution with the visitor instrument ULTRACAM,
   simultaneous with RXTE in X-rays. The ULTRACAM/RXTE schedule is as follows (all
   times UT):  
  
  GX339-4 
  ------- 
  Jun 12 (Chilean night beginning Jun 11) 05:25 : GX339-4_1.obx
  Jun 14 (Chilean night beginning Jun 13) 06:07 : GX339-4_2.obx
  Jun 16 (Chilean night beginning Jun 15) 05:15 : GX339-4_3.obx 
  Jun 18 (Chilean night beginning Jun 17) 07:26 : GX339-4_4.obx  
  
  SwiftJ1753.5-0127 
  ----------------- 
  Jun 13 (Chilean night beginning Jun 12) 05:09 : SwiftJ1753.obx   
  
  The above times are the mid-points of the scheduled ULTRACAM observations. Please
   try and observe as close as possible in time to the above (within a few hours).
   Of course, if this is impossible then try and observe at least somtime on the same
   night as ULTRACAM. In worst case, observation within a couple of nights might also
   be useful.
  
  Note : the GX339-4 OBs are actually identical to each other.

Special Execution Requirements

• Targets are variable and exact magnitude is unknown, which explains the
   multitude of finding charts provided. However, they are both expected to be bright
   (intermediate or high state) currently. GX339-4 is likely to lie between V ~ 16.5
   and 18. And SwiftJ1753.5-0127 is likely to be V~16. 
  
  In case the targets appear much brighter, then please just make sure that the final
   spectra are not saturated, and if the targets are fainter, then you may need to
   increase the acquisition/slit image exposure times.

Special Calibration Information

• None

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 ?

• YES

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 ?

• YES