README web version of /home/usg/OPS/MTS/readme_xml/readme_80075900
Principal Investigator Email Address
Estimated Total Execution Time (hours, including overheads)
General Description
The program aims at spectroscopy of LMC and SMC AGB stars in the wavelength
settings with reference wavelength 2287.0 and 2293.1 nm.
The finding charts are 50"X50" 2MASS K band images, i.e. very close to the observed
wavelength. Some targets appear asymmetric on these images, thus there might be
close companions. The target is in any case the brightest of these objects!
There might show up problems in closing the AO loop on the target (they are fain
in B and R). If closing of the AO loop repeatedly fails, the OB may be executed
without the AO loop closed as long as the final SNR is >= 50.
There are "split" OBs (named HV 5680-1 and -2, BMB 04-1 and -2, HV 1645-1 and -2,
and HV 11427-1 and -2). Preferentially, if scheduling permits, these "split" OBs
should be executed successively, i.e. no other OB inbetween.
We suggest to start out with SMC targets at the beginning of the night when these
are high in the sky, and turn to LMC targets later on in the night.
The number of telluric standard OBs is sufficient. They should be observed at an
airmass similar to that of the targets, not necessarily in the same night.
The SNR/pixel of the telluric standard star should be >= 100 (the ETC gives ~300)
at the reference wavelength (2287.0 and 2293.1nm), and their spectral types are
as follows:
epsilon Tuc: B9IV
HD 43107: B8V
Waiver Requests
Critical Observing Condition Constraints
Time-Critical Aspects
Special Execution Requirements
Special Calibration Information
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 15:40:22 2009
If you have comments, please contact usd-help@eso.org