README web version of /home/usg/OPS/MTS/readme_xml/readme_76504001

Principal Investigator Email Address

• jcg@mpe.mpg.de

Estimated Total Execution Time (hours, including overheads)

• 7.8 hrs

General Description

• The goal is to obtain radial velocity (RV) measurements of the HeII and
   Balmer lines
  to determine the orbital period of this binary system. The expected orbital
  period is 3-4 hrs, and we will cover 2 orbital cycles.
  
  We also take one deep, but broad-band spectrum to identify absorption lines
  in the red part and possibly find the continuum of the white dwarf in the
  blue part. This is a kind of repetition of the 1 hr run C with NTT/EMMI, 
  where this was unsuccesful.
  
  5 OBs are submitted:
  - 2 OBs with 1.5 hr and 2 OBs with 2 hrs for the RV study
  - 1 OB for the deep broad-band spectrum

Waiver Requests

• Waiver Request were accepted for
  - having longer than 1-hr OBs
  - changing from grism 600I to 1200g
  - repeating the EMMI-trial for a broad-band spectrum

Critical Observing Condition Constraints

• None

Time-Critical Aspects

• This is a rare low-state of a VY Scl type system.
  The duration of the low-state is unknown, and not
  predictable - in other systems of this type it
  lasts between 4 weeks and 1 year. We suggest to 
  execute these OBs within the next days.

Special Execution Requirements

• The object is visible for 4 hrs in the morning.
  Thus, not all 4 radial velocity (RV) OBs can be executed consecutively.
  
  We suggest to execute 2 RV OBs consecutively in one night. 
  The other two RV OBs should be executed either in the following night, 
  or the night thereafter (gaps of more than 1 night are depreciated).
  The preference would be to combined the two 1.5-hr OBs in one night,
  and the two 2-hr OBs in the other night.
  
  The broad-band spectrum OB can be executed at any time, also in
  a third night when none of the radial velocity OBs are taken.

Special Calibration Information

• None - I assume that a spectrophotometric standard star is obtained
  for each setting.

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 ?

• 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 have prepared your finding charts with tools other than FIMS,
 do they comply with the specifications on the FORS1 Phase 2 web page ?

• YES