README web version of /home/usg/OPS/MTS/readme_xml/readme_75007801

Principal Investigator Email Address

• fkerber@eso.org

Estimated Total Execution Time (hours, including overheads)

• 9:52:18

General Description

• With FORS2-LSS we aim to obtain low and medium resolution spectra of the
   final Helium shell flash star V4334 Sgr (Sakurai's object). The low resolution spectra,
   using grating 150I in two settings (3300 to 11000 A)  will allow us to gather information
   on the physical state of the emerging PN around V4334 Sgr. To get evidence for the
   expected increase in temperature of the central star, we look for the appareance
   of higher exitation lines, like [OIII] 4959/5007A, and [SIII] 9069/9532A. At higher
   resolution we use Grism 600z, covering 7370 to 10700A and Grism 1200R covering 5750
   to 7300A. 1200R will enable us to study changes in the complex circumstellar velocity
   structure of [NII], Grism 600z to used to study [CI]. Taken together, both data
   will make it possible to compare the velocity structure of the ionized ([NII]) and
   the neutral ([CI]) circumstellar matter of the emerging PN.
  
  The finding charts are produced from images taken with FORS in 2001 (R-band). We
   do not center on V4334 Sgr but on a nearby, bright star (distance ~6.5"). The PA=45
   ensures that V4334 Sgr will also be on the slit. In the through-slit image one should
   see two bright stars; V4334 Sgr itself is too faint.

Waiver Requests

• None

Critical Observing Condition Constraints

• The seeing limit is critical for the scientifc success of the project.

Time-Critical Aspects

• 075.D-0078(A) serves as a pre-imaging run for this run.
  Please execute only after completion of run A.
  The individual OBs within the run are prioritised with 1 being the highest.

Special Execution Requirements

• ---(Empty)---

Special Calibration Information

• ---(Empty)---

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

If you have prepared your finding charts with tools other than FIMS,
 do they comply with the specifications on the FORS2 Phase 2 web page ?

• N/A