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Start Over Subject redshift-surveys Publisher The GAVO DC team Capability Type VOSI Capabilities
1. Photometric redshifts in Stripe 82
ID:
ivo://org.gavo.dc/cs82morphoz/q/cone
Title:
Photometric redshifts in Stripe 82
Short Name:
CS82 cone
Date:
27 Dec 2024 08:31:06
Publisher:
The GAVO DC team
Description:
This is a catalogue of photometric redshifts of galaxies in the Stripe 82 obtained when morphology (galaxy size, ellipticity, Sérsic index, and surface brightness) are included in training on galaxy samples from the SDSS and the CFHT Stripe-82 Survey (CS82). Our redshifts yield a 68th percentile error of 0.058(1 + z), and a outlier fraction of 5.2 per cent.
2. SDSS DR16 Selection
ID:
ivo://org.gavo.dc/sdssdr16/q/cone
Title:
SDSS DR16 Selection
Short Name:
sdssdr16 cone
Date:
27 Dec 2024 08:31:13
Publisher:
The GAVO DC team
Description:
This is a redacted version of the SDSS DR16 table prepared for VizieR (V/154/sdss16). It is mainly here to facilitate local matches; for original SDSS-related research, it is probably better to somewhere else. Over VizieR and SDSS, we are keeping most of the per-band values in arrays to keep the column list manageable. Note that in ADQL, array indexes are 1-based. We are trying to orient our column names on SDSS but use underscores instead of camel-casing (e.g. spec_obj_id instead of SpecObjID), since mixed-case identifiers in SQL is asking for trouble. To save space, we do not keep psf-based classifications, per-band offsets, spectrum metadata, and USNO-related information in this table. Let the operators know if you need any of that.
3. Stripe 82 Photometric Redshifts from SDSS Coadditions
ID:
ivo://org.gavo.dc/annisred/q/cone
Title:
Stripe 82 Photometric Redshifts from SDSS Coadditions
Short Name:
s82 coadd cone
Date:
27 Dec 2024 08:31:03
Publisher:
The GAVO DC team
Description:
This survey gives photometric redshifts of objects within 275 deg² (−50◦ < α < 60◦ and −1.◦25 < δ < +1.◦25) centered on the Celestial Equator. Each piece of sky has ∼20 runs of repeated scanning by the SDSS camera contributing and thus reaches ∼2 mag fainter than the SDSS single pass data, i.e., to r ∼ 23.5 for galaxies.
4. zCosmos Bright Spectroscopic Observations DR2
ID:
ivo://org.gavo.dc/zcosmos/q/ssa
Title:
zCosmos Bright Spectroscopic Observations DR2
Short Name:
zCosmos SSAP
Date:
27 Dec 2024 08:31:03
Publisher:
The GAVO DC team
Description:
The zCOSMOS redshift survey used 600h on the VIMOS spectrograph spread over five observing seasons (2005-2009) to obtain spectra of about 20,000 galaxies selected to have Iab < 22.5 across the full 1.7 deg2 of the COSMOS field. This part, "zCOSMOS-bright", 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.