Archive for October, 2011

Installing matplotlib-1.1.0 in Ubuntu 10.10 (64bit)

Posted October 26, 2011 By grigoris

Ubuntu 10.10 includes matplotlib-0.99 in their repositories, which is not the latest one, so you don’t get the latest cool features (like gridspec)! But as I need some of its features I decided to go on and install the latest version matplotlib-1.1.0, only 20 days after its launch ! First of all it cannot be […]

IRAF’s reject parameter: crreject or avsigclip ?

Posted October 17, 2011 By grigoris

From “A User’s Guide to CCD Reductions with IRAF” by Philip Massey (iraf’s photometry docs) we read at page 19 §3.8 that there are two useful options to set the reject parameter: > reject parameter = crreject when we know the gain and read noise of our camera > reject parameter = avsigclip where the […]