Ureka – one package to install them all!

Among the simplest installation methods to install IRAF are SciSoft (for RedHat/Fedora based distributions) and Fernando Avila Castro iso files (for Ubuntu/Debian based distributions). However, both require root privileges. What can you do when you do not have these permissions? Ureka [1] comes in rescue! It is easy to install …

THELI and Python – when you don’t think enough…

THELI is package for the automated reduction of astronomical imaging data. One of the prerequisite is Python 2.5 or higher (as THELI uses numerous shell and Python scripts). As I had already installed Scisoft 7.5 (with Python 2.5) I though that everything was ok. I started using THELI and indeed …

matplotlib: missed errorbars in logarithmic plot

While manipulating some data I came across to, what looked, a strange behavior with the errorbar of matplotlib, when plotting the results from linear to logarithmic scale. Suppose these data: import matplotlib.pyplot as plt import numpy as np s=[19.0, 20.0, 21.0, 22.0, 24.0] v=[36.5, 66.814250000000001, 130.17750000000001, 498.57466666666664, 19.41] verr=[0.28999999999999998, 80.075044597909169, …