Bob Carswell's Homepage

UNIVERSITY OF CAMBRIDGE

Institute of Astronomy

Bob Carswell's page

Bob Carswell
Institute of Astronomy
Madingley Road
Cambridge CB3 0HA
U.K.

Office: Hoyle 16

Phone: +44.1223.337514
FAX: +44.1223.337523
Email: rfc (at ast.cam.ac.uk)

There may be something vaguely worthwhile here sometime, but I wouldn't count on it. Not a lot has happened to this particular page for several years apart from occasional updates to the photo. This one is from February 2013.

Its main use is to provide links to other pages, including a vpfit program description which gives instructions on how to obtain and use it to fit Voigt profiles to absorption line spectra. This can change somewhat more often, though not very much in the past couple of years. The code is now fairly stable, though there are probably bugs in the more obscure corners of it. The downloadable gzipped tarfile also includes another program, rdgen, which may be used to set up files for vpfit, and generally looking at spectroscopic data.

There is a development version VPFIT10.2 (here as a gzipped tarfile) which is still very slowly evolving but has passed the standard tests so should be OK. The documentation also gets updated occasionally. Your probably won't see any notable differences, but the are some internal improvements and some added capabilities. This is the version which gets looked at if somebody reports a possible bug, or ambiguity in the documentation.

A somewhat dated collection of data showing the redshift evolution of the Lyman alpha forest, covering redshifts up to z=6.3.