README web version of /home/usg/OPS/MTS/readme_xml/readme_83502600
Principal Investigator Email Address
Estimated Total Execution Time (hours, including overheads)
General Description
A.Scientific goal:
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The goal of the observations is to obtain 9 radial velocity measurements
of HD 142527 in a certain time interval (see below) in order to confirm
the planetary candidate.
B. Calibration:
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During two of the epochs, we would need a high SNR early-type telluric
standard star. We have added "template" OBs for this, but at the
telescope, at the time of observation, please do choose another star
from the VISIR catalogue if it would provide a better match in airmass.
It is important that the SNR of the telluric standard spectrum is >400,
such that the quality of the end product is limited by the science SNR
(~300), not the standard star SNR.
C. Object observation:
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The target star is bright (J= 6.53 mag).
We aim to obtain a signal to noise ration of S/N~300.
The object observations are distributed in 9 identical OBs with
the following settings:
48/0/n , ref. wavelength: 1176.2 nm
DIT = 30s
NDIT = 3
NCYCLE = 5
The total execution time including the overhead for a single OB is ~30 minutes.
During 2 of the epochs we wish to take a high SNR telluric standard star as well.
The total time needed to execute the 11 OBs is 5.5 hrs.
Waiver Requests
Critical Observing Condition Constraints
Time-Critical Aspects
NOTE THAT WE HAVE 9 OBSERVATIONS FOR A TOTAL OF 12 SUITABLE EPOCHS.
THUS, WE CANNOT USE "TIME INTERVALS" OPTION IN THE OBs. Please choose
9 epochs from the list below (tolerance +/-1 day, whenever possible),
and make sure to have at least 3 of the "min" and at least 3 of the "max"
epochs. Many thanks!
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The measurements should be taken in July and August 2009.
The ideal observation dates, which have been computed from the current
orbital solution, are as follows:
JD Date/Month RVphase
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2455027.5267 15 Jul min
2455031.0882 18 Jul center
2455036.0227 23 Jul max
2455040.9572 28 jul center
2455044.8190 01 Aug min
2455048.3805 04 Aug center
2455053.3150 09 Aug max
2455057.9063 14 Aug center
2455061.4248 17 Aug min
2455065.2866 21 Aug center
2455069.8779 26 Aug max
2455075.1986 31 Aug center
Special Execution Requirements
Special Calibration Information
D. Telluric standard observations:
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We request 2 observations of a telluric standard star.
AS A REPRESENTATIVE PLACEHOLDER
we have chosen HIP 78104 (RA: 15:56:52.076, DECL: -29:12:50)
from the CRIRES telluric standard catalogue,
but note that it is common practice that the Night Astronomer
performing the observations will choose a bright B-type star
within 0.1 airmass of HD14527 at the time of observation.
Each observation of the telluric standard star must be taken
during a different night. 2 identical OBs have been prepared for this purpose.
ToO Information
ToO Activators List
Do the README file and the instrument comments of the telluric stars
OBs include the required S/N/pixel of the spectrum of the telluric star, its spectral
type and allowed spectral range?
Do any OBs include wavelength or flatfield calibrations?
If you are observing Moving Targets, have you attached suitable ephemeris
files to your OBs?
If the slit viewer guide star is different from the target, are the RA
and DEC offsets accurate to within 0.05 arcsec and do they take into account the
relative proper motion between the two objects?
If you have preferences which OBs should be executed first for objects
at similar RA, did you make use of the User Priority field in the OBs?
Last creation of page: Tue Oct 6 15:40:31 2009
If you have comments, please contact usd-help@eso.org