Directory Structure

Introduction: Header Keywords; Directory Structure; Indexing System; Versioning
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Matching CIAO and CALDB Versions

CALDB 4.1.4 should not be used unless you are running CIAO 4.1 or later versions. CIAO 3.4 requires CalDB 3.5.5, available here.

Are your versions mismatched? Time to ugrade CIAO and CALDB!

News

Previous Items

17 Sep 2009 [New]

CalDB4.1.4, a patch to all previous CalDB4 versions, has been released. It includes the acis Epoch 38 T_GAIN upgrades (May through Jul 09). See the CalDB 4.1.4 release notes for more information.

07 Jul 2009

CalDB4.1.3, a patch to all previous CalDB4 versions, has been released. It includes the acis Epoch 37 T_GAIN upgrades (Feb through Apr 09). See the CalDB 4.1.3 release notes for more information.

27 Mar 2009

CALDB 4.1.2, a patch to CalDB 4.1.0 or 4.1.1, has been released. It includes the ACIS Epoch 36 T_GAIN updates for Nov 08 through Jan 09. See the CalDB 4.1.2 release notes for more information.

21 Jan 2009

CalDB 4.1.1 was released. It includes upgrades to the HRMA Effective Area and the HETG 1st-order grating efficiencies. See the CalDB 4.1.1 for more information on this upgrade.

15 Dec 2008

CalDB 4.1.0, a new CalDB structure for CIAO 4.1, which includes ACIS -120C EPOCH 35 (Aug - Oct 08) T_GAIN updates, was released. See the CalDB 4.0 and CalDB 4.1.0 release notes for more information on this new installation.

Directory Structure

The directory structure itself is determined by the keyword conventions, while the location of a given file within the CALDB is determined by its header keyword values. The CALDB directory structure is given in Table 1, which may be used to locate a specific file in your local CALDB.

**Table 1: Directory structure of the Chandra CALDB.**
TELESCOP	INSTRUME	INDEX/CCLS	CCNM
$CALDB/data/chandra/	acis/	index/	(ACIS index files)
		bcf/	badpix, evtsplt, gain, gtilim, grade, qe
		cpf/	2dpsf, fefs, osip
	ephin/	index/	(EPHIN index files)
		bcf/	geom
	hrc/	index/	(HRC index files)
		bcf/	badpix, degap, fptest, eftest, gtilim, sattest, tapring, qe
		cpf/	2dpsf
	pcad/	index/	(PCAD index files)
		bcf/	align, badpix, ccd, cti, fdc, image, iru, rws, sfma
	sim/	index/	(SIM index files)
		bcf/	pos, poscorr
	tel/	index/	(TEL index files)
		bcf/	aimpts, geom, sky, tdet, obitol
		DETNAM (`INSTRUME="TEL"`)	CCLS (`GRATING="NONE"`)	CCNM
		hrma/	bcf/	effarea, vignet
			cpf/	rpsf, wpsf
			GRATING	CCLS	CCNM
		grating/	hetg/	bcf/	greff
				cpf/	arf, rmf
			letg/	bcf/	greff
				cpf/	arf, rmf

The structure under the "tel" branch is dictated by the guidelines in the ASC FITS Designer's Guide (PS, 40pp). The GRATING keyword and a corresponding classification keyword in the index file are both required.