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Generate random points within SDSS DR8 to DR16 footprint.

Project description

RandomSDSS

PyPI version RandomSDSS Coverage Status Documentation Status License: MIT

Generate random points in the Sloan Digital Sky Survey (SDSS) DR8 to DR16 footprints.

This is a small wrapper around the package pymangle that facilitates the creation of random points in the SDSS fields. I included SDSS polygons for its diferent data releases (DR8 to DR16).

Basic Usage

import matplotlib.pyplot as plt
import randomsdss

dr12 = randomsdss.DR12(catalog="BOSS")
ra, dec = dr12.sky_random(size=10_000)

plt.figure()
plt.scatter(ra, dec, s=1)
plt.xlabel('RA [deg]')
plt.ylabel('DEC [deg]')

DR12 example

Alternatively you can get the same result without the need to instantiate an object using:

ra, dec = randomsdss.sky_random(dr="DR12", catalog="BOSS", size=10_000)

If you also need a random redshift distribution you can provide a sample of redshifts and a random set will be generated from the underlying Probability Density Function (PDF):

z = randomsdss.z_random(z_array, size=10_000)

The z_random is a complementary function since it doesn't use any information from the SDSS catalogs, only the provided redshift array.

Author

Martin Chalela - email: tinchochalela@gmail.com

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