README web version of /home/usg/OPS/MTS/readme_xml/readme_80047700

Principal Investigator Email Address

• jesper@astro.su.se

Estimated Total Execution Time (hours, including overheads)

• 4.5

General Description

• The purpose of this ToO proposal is to take long-slit spectra of three
  previously-confirmed high-redshift Type Ia supernovae at two phases
  in their evolution (seperated by ~2 observer-frame weeks).
  
  We require a unique setup for these observations: LSS mode, 1.0" slit,
  300V grism, GG435 filter. The targets are given the preliminary name
  "SN2007xx" as these supernovae are yet to be discovered. We have
  prepared one OB per exposure time request (see ToO information) to
  cover faint/bright targets.
  
  We will provide the RA, DEC, finding chart, and target name at
  trigger. We may also require that the position angle be set to a
  different value than its default (0), to include another target,
  e.g. the host galaxy of the supernova, in the same spectroscopic
  slit.

Waiver Requests

• A waiver request was submitted on Fri, 20 Jul 2007 and approved on
  Mon, 30 July 2007. The reason for this request was OBs in excess of
  one hour.

Critical Observing Condition Constraints

• These high-redshift Type Ia supernovae are faint targets (R =
  22.0-23.5) that will be observed during grey time. Therefore, seeing
  is key (<= 0.8") and sky transparancy must be clear.

Time-Critical Aspects

• There are no time-critical aspects.

Special Execution Requirements

• ---(Empty)---

Special Calibration Information

• We have provided OBs for flux-calibration of our spectra. The OBs are
  called:
  
  ToO_CAL__LSS,
  
  where  is the name of the standard star:
  
  STD_NAME	Vmag	SpecType
  --------------------------------
  Feige110	11.83	DOp
  LTT2415		12.21	F?
  LTT9491		14.10   DC
  VanMaanen2	12.38	DZ7
  
  We have set the exposure time to 60s in each case (00:13:57.000
  execution time in each case), but we ask the service observer to
  adjust the exposure times slightly to ensure there are sufficient
  counts while avoiding saturation.
  
  We will usually request one such calibration spectrum one the same
  night as the science observation.

ToO Information

• This is a ToO run. The supernovae we are planning to follow-up
  spectroscopically are yet to be discovered. The supernova coordinates,
  magnitude, phase will be provided by members of the ESSENCE Team, who
  will have a first spectrum to confirm the supernova is indeed of type
  Ia. 
  
  We do not yet know the magnitudes of these targets, which depend both
  on the individual supernova and its phase. However, we expect these to
  be in the range R = 22.0-23.5. We have prepared a set of OBs, all
  identical except for the exposure times. Some comprise two exposures,
  others three, with a 6" offset between each. Below are the integration
  times and the corresponding total execution time (as reported by p2pp)
  of each OB: 
  
  Exposure Time	Execution Time
  ------------------------------
  3 x 1200s       01:18:48.000
  3 x 1500s       01:33:48.000
  3 x 1800s       01:48:48.000
  
  The OB names reflect these exposure times, and are called:
  
  ToO_SN2007xx_LSS_exp, 
  
  where  is one of 3x1200, 3x1500, 3x1800; e.g.:
  
  ToO_SN2007xx_LSS_exp3x1200,
  
  is an OB consisting of 3 exposures of 1200s (20 minutes) each, with
  offsets of 6" between each 1200s exposure.

ToO Activators List

• The following investigators are authorized to trigger a ToO
  observation for this programme:
  
  Jesper Sollerman (jesper@astro.su.se)
  Tamara Davis (tamarad@mso.anu.edu.au)
  Bruno Leibundgut (bleibundgut@eso.org)
  Peter Challis (pchallis@cfa.harvard.edu)
  Stephane Blondin (sblondin@cfa.harvard.edu)

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 ?

• YES

Have you included OBs for any calibrations that you need but which are
 not part of the Calibration Plan ?

• YES

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 ?

• N/A