Bob Carswell
Institute of Astronomy
Madingley Road
Cambridge   CB3 0HA
U.K.
 
Office: Hoyle 16

Phone:            +44.1223.337514
Switchboard: +44.1223.337548
FAX:               +44.1223.337523
Email:  rfc (at ast.cam.ac.uk)

The main use for this page is to provide links various versions of a Voigt profile fitting program. 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.

A fairly stable version VPFIT11.1 (here as a gzipped tarfile) has passed the standard tests so should generally be OK. This is now the version which gets looked at if somebody reports a possible bug, or ambiguity in the documentation. The documentation is included in the tarfile but is also available separately. For those using Overleaf the most up-to-date version may be found at https://www.overleaf.com/read/qjnqkqthzkkx.

An earlier version is VPFIT11.0. This version was posted here 9 Nov 2017.

If you want older versions (vpfit10.4, 9.5) then these still exist. Please ask, or, for now, look at vpfit.html.

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

Other links

Last update: 6 August 2018
by rfc