* Version 2.0.1 Released To Address Error
* New version of AtomDB WebGUIDE available
For questions or suggestions about AtomDB, use the online contact form:
http://www.atomdb.org/contact.php
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* Version 2.0.1 Released
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We have discovered, thanks to Michael Loewenstein, a mistake in the
AtomDB v2.0.0 release which has necessitated the release of v2.0.1. The
error was in the iron radiative recombination continuum, which was
overestimated for certain iron ions (specifically Fe XVIII and Fe XXI)
by up to a factor of ~8 due to incorrect data in the database for the
recombination to the ground state. In addition, we have identified other
ions where the ground state recombination was mistakenly omitted. In
both equilibrium and ionizing plasmas, the recombination continua from
iron ions is a minor term relative to the bremsstrahluing continuum, so
this omission did not create any noticeable impact. Nonetheless, it has
been fixed in the new release.
Since the error was limited to recombination to the ground state, there
is no impact to any line emission.
We recommend all users of AtomDB update to the new version immediately,
and not use the Version 2.0.0 files (for example, the files
apec_v2.0_line.fits and apec_v2.0_coco.fits). We apologize for any
confusion or mistakes caused by the error. The new files are available
on the AtomDB site at http://www.atomdb.org/download.php.
Instructions for using these files with XSPEC, Sherpa, and ISIS are
available at
http://www.atomdb.org/faq.php#UsingAtomdb200
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* New version of AtomDB WebGUIDE available
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A new version of the AtomDB WebGUIDE tool is now available at :
http://www.atomdb.org/Webguide/webguide.php
The new version includes more information about individual transitions.
After specifying a specific transition, or clicking on a specific line
after selecting a line list, the website now lists all the relevant
information about the transition (including the electronic
configuration, the quantum state, oscillator strengths, etc) as well as
the source of the electronic collisional excitation data and any other
relevant data in AtomDB.
Thanks to Eugene Churazov for suggesting these enhancements. Please do
not hesitate to suggest improvements to either the AtomDB database or
web pages!
This archive was generated by hypermail 2b29 : Wed May 15 2013 - 01:00:13 EDT