The WHT observations logs have a fixed format, with some columns being used for all observations, some for spectroscopy only, some for adaptive-optics only. Exposures with visiting instruments using their own detectors
are usually not logged automatically. The columns are:
Run |
Run number. The corresponding file name is the run number preceded by 'r'.
|
Object |
Name as typed in by the observer when exposing or,
if the observer enters no name, the name of the object at
which the telescope is currently pointing.
|
RA |
Format: hh mm ss.ss
|
Dec |
Format: dd mm ss.s
|
Equinox |
Equinox of the coordinates given in the previous two columns.
|
UT |
UT start.
|
Airm |
Airmass.
|
Instr |
Abbreviated instrument name e.g. ISISR, ISISB (the two arms of ISIS).
|
Texp |
Exposure time (sec).
|
Sky PA |
Sky positional angle (deg) as measured from North to East.
|
Filters |
Filters in the light path.
|
Slit |
Slit width (arcsec), where relevant.
|
Grat Grism |
Diffraction grating or grism in the light path, where relevant.
|
CenwA |
Central wavelength (Angstrom), where relevant.
|
-- NAOMI -- |
NAOMI parameters, for adaptive-optics (AO) observations:
L indicates the lenslet array being used in the wavefront-sensor
(WFS);
WM is the WFS readout mode;
Twfs is the WFS integration time in msec.
l indicates the AO-loop status (O for open, C for closed).
|
INGR |
INGRID (IR detector) parameters:
Co = number of frames being co-averaged; M = Readout mode.
|
Comments |
Comments, as entered in the log by the observer.
|
