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hypercat maintains catalogues of data collected in the literature or at the telescope , concerning the photometry , kinematics and spectrophotometry of galaxies . some catalogues contain `` global '' properties as total magnitude and other spatially resolved data . they give basic data to study the scaling relations of galaxies , as for instance the fundamental plane , and contain all the information needed to make the necessary corrections and normalizations in order to compare measurements of galaxies at different redshifts . the catalogues of global properties are :    * _ the catalogue of central velocity dispersions _ ( for galaxies and globular clusters ) has been presented in a preliminary form in prugniel & simien 1996 . the present version gives 5470 measurements published in 352 references for 2335 objects . hypercat allows one to retrieve the published measurements as well as homogenized ( ie . corrected for systematics effects between datasets ) and aperture corrected data . * _ the catalogue of magnitudes and colours _ ( published in prugniel & heraudeau , 1998 ) presents the photometry of 7463 galaxies in the u to i bands . the global parameters , asymptotic magnitude , surface brightness , photometric type ( ie . shape of the growth curve ) , colour and colour gradients were computed from circular aperture photometry . * _ the catalogue of mg2 index _ ( published in golev & prugniel , 1998 ) have 3712 measurements for 1416 galaxies . aperture corrections and homogenization are available . * _ the maximum velocity of rotation _ is available for the stellar rotation of 720 galaxies ( mostly early - type ) . they represents 1491 measurements taken in 224 dataset . a bibliographical catalogue of spatially resolved kinematics ( prugniel et al . 1998 ) indexes 6214 measurements for 2677 galaxies . in addition , other parameters , like the recession velocity , galactic absorption or environment parameters , are automatically extracted from other databases and hypercat provides procedures to compute derived parameters . however , the present understanding of the scaling relations becomes limited by the quality of the parameterization restricted to these `` global '' values . for instance , in prugniel et al . ( 1996 ) we have shown that a more detailed description , including rotation and non - homology of the structure , must be taken into account when studying the fundamental plane of early - type galaxies . for this reason , hypercat has also embarked in the gathering and distribution of spatially resolved data such as _ multi - aperture photometry _ for 20537 galaxies ( 222045 measurements ) , _ kinematic profiles _ `` rotation curve '' , velocity dispersion profiles ... ) for 1761 galaxies ( 73520 measurements ) and _ catalogue of line strength profiles _ ( currently under development ) . an original aspect in the development of hypercat is that the different catalogues are _ separately maintained in different sites_. the database is automatically updated by procedures running over the network at time of low - traffic . at present , observatories participating to the project are : capodimonte ( napoli ) , sternberg ( moscow ) , brera ( milano ) , university of sofia and lyon . the distribution , over several astronomers , of the work to maintain this database makes the individual charge affordable and we can foresee that we will be able to continue this part of the project . in addition , as hypercat becomes known in the community , people begin to send us their data in a form making them easy to implement . the usual approach when new measurements are needed is to make new observations . this is justified when the past observations do not have the required quality , but archived observations offer in many cases a serious alternative _ if _ the data can be accessed easily and have a good enough description . we started in 1998 the construction of a fits archive in hypercat ( hfa ) coupled to data - mining procedures aimed at distributing data at any desired stage of processing or even measurements . at present hfa contains 29366 fits files ( for 14631 galaxies ) mainly from the our medium resolution spectra of galaxies ( golev et al 1998 for details ) and eso - lv survey ( lauberts et al . 1989 ) .    in the near future , we will archive other datasets , and in particular we call for contributions from astronomers outside our group which may be interested to distribute their data through this channel . golev , v. , prugniel , ph . , 1998  132 , 255 lauberts , a. , valentijn , e. a. , 1989 , eso ( 1989 ) , 0 maubon , g. , prugniel , ph . , golev , v. , simien , f. , 1998 _ la lettre de lohp _ 18 prugniel , ph . , simien , f. , 1996  309 , 749 prugniel , ph . heraudeau , ph . , 1998  128 , 299
the hypercat database is developed at _ observatoire de lyon _ and is distributed on the web(www - obs.univ - lyon1.fr / hypercat ) through different mirrors in europe . 
 the goal of hypercat is to gather data necessary for studying the evolution of galaxies ( dynamics and stellar contains ) and particularly for providing a @xmath0 reference for these studies .