README web version of /home/usg/OPS/MTS/readme_xml/readme_78506600

Principal Investigator Email Address

• hmeng@pku.edu.cn

Estimated Total Execution Time (hours, including overheads)

• 02:35:58

General Description

• This program is aimed to take deep imaging of the extinct comet candidate
   (85490) 1997 SE5. FORS1 is responsible for the work in the blue part of the spectral
   range. (FORS2 is for the red part.)
  
  This run includes three OBs with the same configuration. Their postscrpts are S,
   1 and 2 (S for simultaneity with FORS2).
  
  (Updated on May 2) Now the April time-window has passed with no observation performed.
   Thus, the window in May will be the last chance for the observations. The Time Intervals
   given in the OBs are due on May 10, but it can be narrowly extended to May 18 at
   most. Please send me an email to ask for additional ephemeris file if necessary.
  
  The target asteroid may have a coma around it. So in deep imaging, the asteroid
   may be a come-like extended source, or have a PSF with broader FWHM than normal
   field stars. To monitor the possible effects, the OBs are designed in order to take
  1) LONG exposures WITH differential tracking rates for the asteroid (900s in u,
   420s in b, and 140s in v); and
  2) SHORT exposures withOUT non-sidereal tracking, which are taken for the field
   (30s in u, 6s in b, and 2s in v).
  
  The ephemeris position of the object should be very precise, pls refer to it and
   keep the asteroid reasonably far away from the "blind strip" between the CCDs.
  
  In case of emergency, please call the PI at (+86) 131 4616 7505 (cell phone, 24h
   available).

Waiver Requests

• The long time of observation in service mode and non-standard configuration
   has been approved with Waiver 278.C-5066A.01.

Critical Observing Condition Constraints

• For the simultaneous observation with FORS2 on April 20:
  dark, clear, seeing < 1.0", airmass < 3.0
  
  For other time:
  dark, photometric, seeing < 0.8", airmass < 3.0
  
  (Please see the Constraint Set.)

Time-Critical Aspects

• Please see the Time Intervals for the time windows. They are set to meet
   the suitable elongation, phase angle, orbital plane angle, non-sidereal rate of
   the asteroid, and the moon phase. So please make every effort to comply with it.
  
  Now the April time-window has passed with no observation performed. Thus, the window
   in May will be the last chance for the observations. The Time Intervals given in
   the OBs are due on May 10, but it can be narrowly extended to May 18 at most. Please
   send me an email to ask for additional ephemeris file if necessary.

Special Execution Requirements

• ---(Empty)---

Special Calibration Information

• Besides biases and darks, the following items are additionally needed:
  1) Imaging sky flats (ubv) in HR (twilight flats, at least in the same week)
  2) ubv photom. std in HR (in the same night)
  3) AM>1.6 ubv std in HR (at least in the same week)
  
  As all these items are included in the Calibration Plan (as in the FORS User Manual),
   no calibration OB is provided.

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 ?

• N/A

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?

• YES

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 ?

• 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 ?

• N/A