Access to Astronomical Catalogues

← Click to display the menu
B/bax               The BAX Database                 (Blanchard+, 2004)

X-Rays Galaxy Clusters Database. Sadat R., Blanchard A., Kneib J.-P., Mathez G., Madore B., Mazzarella J.M. <Astron. Astrophys. 424, 1097 (2004)> =2004A&A...424.1097S (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; X-ray sources Keywords: galaxies: clusters: general - X-rays: galaxies - astronomical databases: miscellaneous Abstract: We present BAX, Base de Donnees Amas de Galaxies X (, a multi-wavelength database dedicated to X-ray clusters and groups of galaxies allowing detailed information retrieval. BAX is designed to support astronomical research by providing access to published measurements of the main physical quantities and to the related bibliographic references: basic data stored in the database are cluster/group identifiers, equatorial coordinates, redshift, flux, X-ray luminosity (in the ROSAT band) and temperature, and links to additional linked parameters (in X-rays, such as spatial profile parameters, as well as SZ parameters of the hot gas, lensing measurements, and data at other wavelengths, such as optical and radio). The clusters and groups in BAX can be queried by the basic parameters as well as the linked parameters or combinations of these. We expect BAX to become an important tool for the astronomical community. BAX will optimize various aspects of the scientific analysis of X-ray clusters and groups of galaxies, from proposal planning to data collection, interpretation and publication, from both ground based facilities like MEGACAM (CFHT), VIRMOS (VLT) and space missions like XMM-Newton, Chandra and Planck. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file bax.dat 155 1713 Main parameters of the BAX database
See also: : The BAX database Byte-by-byte Description of file: bax.dat
Bytes Format Units Label Explanations
1- 23 A23 --- Name Name of cluster 25- 32 F8.4 deg RAdeg ?=-99.99 Right ascension (J2000) 34- 41 F8.4 deg DEdeg ?=-99.99 Declination (J2000) 43- 49 F7.3 --- z ?=-99.99 Redshift 51- 61 F11.6 10-15W/m2 Fx ?=-99.99 Flux in the 0.1-2.4keV band 63- 81 A19 --- r_Fx Reference (bibcode) of Fx 83- 92 F10.6 10+37W Lx ?=-99.99 Luminosity in the 0.1-2.4keV band (in 1044erg/s) 94-112 A19 --- r_Lx Reference (bibcode) of Lx 114-119 F6.2 keV Tx ?=-99.99 Temperature of the intracluster gas 121 A1 --- --- [-] 122-127 F6.4 keV e_Tx ? Mean error (lower) on Tx 129 A1 --- --- [+] 130-135 F6.4 keV E_Tx ? Mean error (upper) on Tx 137-155 A19 --- r_Tx Reference (bibcode) of Tx
Acknowledgements: Alain Blanchard, ablancha(at)
(End) Francois Ochsenbein [CDS] 07-Aug-2004
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service