SSA Services
Simple Spectral Access Protocol (SSAP) is a HTTP-based query protocol on one-dimensional spectra. The query returns a list of candidate spectra with description and location of the actual spectral data. The actual spectral data can be retrieved at the URL given in the "Access Reference" field. For further information how to use the service, please look at our Help pages which can be accessed from the main service pages.
We also offer browser based service applications that can be reached via the button below.
SSA Services on Max-Planck-Institut für extraterrestrische Physik (MPE) Spectra
GAVO provides SSA services on the spectra from various projects in which MPE scientists participate. The following spectra are available via GAVO services:
CDFS Optical Spectra
A set of optical spectra that were the result of the spectroscopic follow-up of X-ray sources in the Chandra Deep Field South (R. Giacconi et. al.). The nominal aim point of the data set is RA = 3hr32m28s.0(53.1167 deg), and DEC = -27o48'30''(-27.8083 deg) (J2000) covering the 1Msec Chandra X-Ray observation. It was carried out with VLT/FORS in the time frame of October 2000 to December 2001. There are 296 spectra available.
zCOSMOS Bright Spectroscopic Observations Data Release DR2
The global COSMOS project is aimed at understanding the evolution of galaxies and active galactic nuclei, and in particular the role of the galactic environment in that evolution. It is built around observations of a single equatorial 1.7 deg2 field corresponding to transverse dimensions of 100 x 100 Mpc2. The zCOSMOS redshift survey is a major project (ESO Large Program 175.A-0839) that is using 600 hours of observing time with the VIMOS spectrograph on the VLT UT3, spread over five observing seasons (2005-2009). It consists of two parts (see Lilly et al., 2007, for details): the first, "zCOSMOS-bright", obtains spectra of about 20,000 galaxies selected to have IAB < 22.5 across the full 1.7 deg2 of the COSMOS field.
The zCOSMOS-bright sample was designed to yield a high and fairly uniform sampling rate (about 70%), with a high success rate in measuring redshifts (approaching 100% at 0.5 < z < 0.8), and with sufficient velocity accuracy (about 100 km/s) to efficiently map the environments of galaxies down to the scale of galaxy groups out to redshifts z ~ 1.
The second part, the "zCOSMOS-deep", will consist of about 10,000 spectra of higher redshift galaxies, colour-selected to have redshifts in the 1.4 < z < 3.0 range, and lying in the central 1 deg2 region of the COSMOS field.
After the first two zCOSMOS observing seasons in 2005 and 2006, about a half of the zCOSMOS-bright observations had been completed, yielding a total of over 10,500 spectra from which redshift measurements have been made. This sample, the so-called "10k-sample" (Lilly et al., 2008, The Messenger, vol. 134, p. 35-40 ), is the one released here (DR2).
The TheoSSA Service is another spectral service developed by GAVO. It is still supported and developed further. Follow this link to TheoSSA to get more information.