Astronomical publications

• NASA ADS Abstract Service
• Tiny version of ADS for some popular searches
• Astro-ph at arxiv.org .
• Knowledge base of articles and lectures and reviews on main astrophysical topics

Catalogs and Sky Surveys

• Sloan Digital Sky Survey
• Professional version of SkyServer of SDSS
• Database schema browser of SDSS DR5
• HST Search.
• La Palma Archive
• ESO and Space telescope Science Archive Facilities
• IRSA - NASA/IPAC Infrared Science Archive
• 2MASS Large Galaxy Atlas
• HyperLeda
• NED - NASA/IPAC extragalactic database
• Centre do données astronomiques de Strasbourg.
• Aladin, java applet of Interactive Sky Atlas.
• GOLDMine - Galaxy On Line Database Milano Network
• Atlas of peculiar galaxies (Halton Arp)
• Astronomical resources from NRAO
• The Rogues Gallery -- The galery of HI images in weird :) galaxies.

Astronomical meetings and conferences

• International Astronomy Meetings List

Recent astronomical events.

• Latest supernovae (with pretty images)
• List of supernovae
• GCN Circulars Archive.

Astronomy and programming

• IDL Libraries Browser by Eric Deutsch
• Netlib
• Astrophysics Source Code Library
• Astronomical software directory.
• Astronomy software servers.
• WCS tools
• CFITSIO -- library to deal with FITS files
• ESO-MIDAS
• IRAF -- Image Reduction and Analysis Facility
• PyRAF -- "pythonized" implementation of IRAF.
• PyMIDAS -- the python interface to ESO-MIDAS
• STSDAS -- The best software package for IRAF for reduction of HST data (and not only HST)

IDL programming

• Astrolib
• IDL Curve Fitting and Function Optimization (mpfit.pro and others based on algorithms of MINPACK-1

Stellar photometry techniques

• Lecture of Peter Stetson on stellar photometry
• Online version of Peter Stetson's paper on DAOPHOT - program of processing of images of crowded stellar fields.
• Online version of Peter Stetson's paper on grow curves
• Method of Edward Groth of matching star lists using the match of triangles

Surface photometry techniques

• GALFIT, a beautiful program by Chen Peng for surface photometry.

Stellar spectra and stellar populations

• STELIB - A stellar Library for stellar population synthesis models
• ELODIE: the new stellar library with high resolution spectra.
• The Indo-U.S. Library of Coud. Feed Stellar Spectra
• Kurucz models of stellar atmospheres.

Current work links