ITEM_TITLE	Raw CALIB data types
ITEM_ANAME	raw

GIRAFFE calibration data are mostly taken as daytime calibrations. Flux standard stars and nasmyth screen flats are taken, as part of the calibration plan, for Argus data. 
Find information about the GIRAFFE data format, spectral format and the detector <a href=/observing/dfo/quality/GIRAFFE/pipeline/pipe_gen.html>here</a>.

The following calibration data are taken as part of the daily GIRAFFE calibration plan. The data types are identified by the DPR TYPE keyword in the FITS headers.

TABLE_NAME	calib
TABLE_TYPE	TABLE_CUSTOMHDR
TABLE_HEADER	frame	SEP	DPR.CATG	SEP	DPR.TYPE	SEP	DPR.TECH	SEP	purpose				SEP	N*
TABLE_ROW1	BIAS	SEP	CALIB		SEP	BIAS		SEP 	IMAGE		SEP	detector status, bias level 	SEP	5
TABLE_ROW2	DARK	SEP	CALIB		SEP	DARK		SEP IMAGE		SEP	dark current (for maintenance); CCD glow (old CCD only) SEP	3
TABLE_ROW3	FLAT (taken with the calibration lamp on the robot arm; this is the regular flat also called 'robotic' flat) SEP CALIB SEP LAMP,FLAT SEP  MOS (for Medusa) or IFU (for IFU and Argus) SEP signal localization and extraction; fix-pattern noise, fringing SEP 3
TABLE_ROW4	FLAT (taken with the nasmyth screen illuminated; this is the 'attached' flat taken during the night, useful for Argus mode because of better illumination) SEP CALIB SEP LAMP,FLAT,NASMYTH SEP MOS (for Medusa) or IFU (for IFU and Argus) SEP same as  FLAT SEP 3
TABLE_ROW5	IMAGE FLAT SEP	CALIB	SEP LAMP,FLAT,DETCHECK SEP IMAGE SEP detector monitoring SEP 40
TABLE_ROW6	ARC-LAMP SEP CALIB SEP LAMP,WAVE SEP MOS (for Medusa) or IFU (for IFU and Argus) SEP dispersion relation, wavelength calibration, resolution monitoring SEP 1
TABLE_ROW7	STD (flux standard star, taken for Argus data) SEP CALIB SEP STD SEP IFU (argus) SEP relative flux calibration SEP 1

*N: typical number taken per night and setting<p>

The ARC-LAMP and FLAT frames split into five fibre system (MEDUSA1/2; IFU1/2;
Argus). They also split into two different gratings (HR and LR) with a set of
standard wavelengths (which are listed <a
href=/observing/dfo/quality/GIRAFFE/pipeline/settings.html>here</a>). <p>

BIAS frames are taken in unbinned (1x1) mode, normal, high or low gain.<p>

The flux STD data are regularly taken for the Argus and IFU settings.<p>

In addition, DARK frames are taken about monthly, to monitor the dark current
level.<p>

A series of about 40 IMAGE FLATs is also taken roughly once per month, to
monitor the status of the detector. They come in pairs with exposure times
increasing from 0 to about 280 sec (saturation). Both types of data are not
required for science reduction.