CALDB Public Release Notes
Version 2.10
Effective Date: 2001-12-12T20:00:00

I. Summary of Changes

A. HRC-I QE version 4 (version 4)
FILENAME: $CALDB/data/chandra/hrc/bcf/qe/hrciD1999-07-22qeN0004.fits
This is an upgrade from the previous version (3) because it includes
the latest HRC-I UV ion shield transmissions available on the CAL web page.

B. PIMMS Effective Areas in FITS/CALDB format, versions 3 and 4.
FILE LOCATIONS: $CALDB/data/chandra/acis/cpf/pimms/
                $CALDB/data/chandra/hrc/cpf/pimms/
                $CALDB/data/chandra/tel/grating/hetg/cpf/pimms/
                $CALDB/data/chandra/tel/grating/letg/cpf/pimms/
(These are all new directories added with CALDB 2.10.)
The effective areas for the Chandra instrument and grating
configurations currently supported in the proposal tool "PIMMS"
are being added (and released) with the Chandra CALDB. The ONLINE
version of PIMMS at CXC for AO-4 will use the active CXC CALDB to access
effective area data, rather than using imported ASCII files for this
purpose.

C. Repaired LSFPARM files for LETG/HRC-S and LETG/ACIS-S
configurations (version 2)
FILENAMES: $CALDB/data/chandra/tel/grating/letg/cpf/lsf/acissleg1D1999-07-22lsfparmN0002.fits
           $CALDB/data/chandra/tel/grating/letg/cpf/lsf/hrcsleg1D1999-07-22lsfparmN0002.fits
These are, again, input data for "mkgrmf" for two LETG configurations.
Both these files contain identical data blocks in the principal HDU,
a binary table. The HRC-S file is a correction to version 1,
distributed with CALDB 2.9, but subsequently found to be a broken
file. The ACIS-S file will be called automatically by "mkgrmf" for
LETG/ACIS-S configuration observations. The previous file,
hrcsleg1D1999-07-22lsfparmN0001.fits, is broken and can be deleted.
It had been released with CALDB 2.9.

D. Canned grating effective area files (GARFs) for LETG/HRC-S orders
-1, 0, and 1.
FILENAMES:
$CALDB/data/chandra/tel/grating/letg/cpf/arf/hrcsletg0D1999-07-22arfN0003.fits
$CALDB/data/chandra/tel/grating/letg/cpf/arf/hrcsleg1D1999-07-22arfN0003.fits
$CALDB/data/chandra/tel/grating/letg/cpf/arf/hrcsleg-1D1999-07-22arfN0003.fits
These are effective areas for their corresponding orders as released
directly by the LETG calibration group for LETG/HRC-S configurations.
These have been downloadable (with other filenames) from the CIAO
threads page, but will hereafter be available from your local Chandra CALDB.

II. Technical Details
A. HRC-I QE version 4:
The input data for this file are located at the following URL's:
For the raw MCP QE:
http://asc.harvard.edu/cal/Links/Hrc/CIP/Flight/mcp_qe_i.v1.mdl (data)
http://asc.harvard.edu/cal/Links/Hrc/CIP/Flight/mcp_qe_i.v1.gif (plot)
These are the same data as in HRC-I QE version 3.

For the HRC-I UVIS transmission:
http://asc.harvard.edu/cal/Links/Hrc/CIP/SACpre/uvis_i.v3.mdl (data)
http://asc.harvard.edu/cal/Links/Hrc/CIP/SACpre/uvis_i.v3.gif (plot)
These have new data around the Carbon K absorption edge.

B. PIMMS Effective Areas
The details about the PIMMS files will be posted on the CALDB
proposal planning files page, at
http://cxc.harvard.edu/caldb/proposal_planning.html (not yet released).

C. LSFPARM files
These files contain Lorentzian and Gaussian commponent parameters for
the line-spread function of LETG mainly with HRC-S. A web page is
forthcoming describing these data in more detail.

D. LETG/HRC-S -1, 0, and 1st order GARFs
We refer you to the LETG Calibrations page for effective areas. 
http://asc.harvard.edu/cal/Links/Letg/User/Hrc_QE/ea_index.html
The files now in the CALDB are identical to those corresponding
fits files available from this web page, except that the have
been renamed in CALDB standard naming convention, and have had
CALDB indexing keywords and boundary conditions added.