Neil C nhmc
nhmc
/ mortgage_repayments.ipynb
Created
February 11, 2016 02:22
A mortgage repayment calculator written in Python using a Jupyter notebook
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nhmc
/ Curve of Growth calculation
Last active
December 15, 2015 04:39
An IPython notebook generating a curve of growth (rest equivalent width vs column density) for neutral hydrogen.
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| { | |
| "metadata": { | |
| "name": "Curve of growth" | |
| }, | |
| "nbformat": 3, | |
| "nbformat_minor": 0, | |
| "worksheets": [ | |
| { | |
| "cells": [ | |
| { |
nhmc
/ calc_bg.py
Created
November 16, 2012 10:43
Calculate the background and RMS of an astronomical image
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| import numpy as np | |
| def calc_bg(a): | |
| """ Estimate the background level and rms. """ | |
| good = ~np.isnan(a) | |
| assert good.sum(), 'no good pixels!' | |
| # poor man's source detection... | |
| vmax = np.percentile(a[good], 80) | |
| c0 = a[good] < vmax | |
| temp = a[good][c0] |