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3361. COSMOSFieldX-Ray&FIRDetectedAGNMultiwavelengthPropertiesCatalog
ID:
ivo://nasa.heasarc/cosxfirmwc
Title:
COSMOSFieldX-Ray&FIRDetectedAGNMultiwavelengthPropertiesCatalog
Short Name:
COSXFIRMWC
Date:
07 Mar 2025
Publisher:
NASA/GSFC HEASARC
Description:
The coeval AGN and galaxy evolution and the observed local relations between super-massive black holes (SMBHs) and galaxy properties suggest some connection or feedback between SMBH growth and galaxy build-up. The authors looked for correlations between properties of X-ray detected AGN and their far-infrared (FIR) detected host galaxies, to find quantitative evidences for this connection, highly debated in recent years. They exploit the rich multi-wavelength data set (from X-ray to FIR) that is available in the COSMOS field for a large sample (692 sources) of AGN and their hosts, in the redshift range 0.1 < z < 4, and use X-ray data to select AGN and determine their properties (intrinsic luminosity and nuclear obscuration), and broad-band (from UV to FIR) spectral energy distribution (SED) fitting to derive host galaxy properties, viz., the stellar mass (M<sub>*</sub>) and the star formation rate (SFR). The authors find that the AGN 2-10 keV luminosity (L<sub>X</sub>) and the host galaxy 8-1000 um star formation luminosity (L<sup>SF</sup><sub>IR</sub>) are significantly correlated. However, the average host L<sup>SF</sup><sub>IR</sub> has a flat distribution in bins of AGN L<sub>X</sub>, while the average AGN L<sub>X</sub> increases in bins of host L<sup>SF</sup><sub>IR</sub>, with a logarithmic slope of ~ 0.7, in the redshifts range 0.4 < z < 1.2. In the reference paper, the authors also discuss the comparison between the distribution of these two quantities and the predictions from hydrodynamical simulations. Finally, they find that the average column density (N<sub>H</sub>) shows a positive correlation with the host M<sub>*</sub>, at all redshifts, but not with the SFR (or L<sup>SF</sup><sub>IR</sub>). This translates into a negative correlation with specific SFR. These results are in agreement with the idea that BH accretion and SFRs are correlated, but occur with different variability time scales. The presence of a positive correlation between N<sub>H</sub> and host M<sub>*</sub> suggests that the X-ray N<sub>H</sub> is not entirely due to the circumnuclear obscuring torus, but may also include a contribution from the host galaxy. This table summarizes the multiwavelength properties of the 692 AGN-host systems detected in the COSMOS field both in the X-ray and in the FIR (the X-FIR sample). This table was created by the HEASARC in July 2017, based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/A+A/602/A123">CDS Catalog J/A+A/602/A123</a> file table1.dat, which contains the multiwavelength properties of the 692 sources in the X-FIR sample. This is a service provided by NASA HEASARC .
3362. COSMOS GMRT 610 MHz Catalog
ID:
ivo://irsa.ipac/COSMOS/Catalog/COSMOSGMRT610
Title:
COSMOS GMRT 610 MHz Catalog
Short Name:
COSMOSGMRT610
Date:
24 Sep 2020 00:42:42
Publisher:
NASA/IPAC Infrared Science Archive
Description:
The GMRT observations of the 2 sq. deg. COSMOS field were conducted using 30 antennas, their longest baseline being 25 km. The channel width of observations was 125 kHz, with a total bandwidth of 32 MHz.
3363. COSMOS GMRT 325 MHz Catalog
ID:
ivo://irsa.ipac/COSMOS/Catalog/COSMOSGMRT325
Title:
COSMOS GMRT 325 MHz Catalog
Short Name:
COSMOSGMRT325
Date:
24 Sep 2020 00:42:42
Publisher:
NASA/IPAC Infrared Science Archive
Description:
The GMRT observations of the 2 sq. deg. COSMOS field were conducted using 30 antennas, their longest baseline being 25 km. The channel width of observations was 125 kHz, with a total bandwidth of 32 MHz.
3364. COSMOS Intermediate and Broad Band Photometry Catalog
ID:
ivo://irsa.ipac/COSMOS/Catalog/COSMOS-ibphot
Title:
COSMOS Intermediate and Broad Band Photometry Catalog
Short Name:
COSMOS-ibphot
Date:
01 Oct 2018 20:27:21
Publisher:
NASA/IPAC Infrared Science Archive
Description:
COSMOS is an astronomical survey designed to probe the formation and evolution of galaxies as a function of cosmic time (redshift) and large scale structural environment. The survey covers a 2 square degree equatorial field with imaging by most of the major space-based telescopes (Hubble, Spitzer, GALEX, XMM, Chandra) and a number of large ground based telescopes (Subaru, VLA, ESO-VLT, UKIRT, NOAO, CFHT, and others). Over 2 million galaxies are detected, spanning 75% of the age of the universe.
3365. COSMOS lens candidates with LensFlow
ID:
ivo://CDS.VizieR/J/ApJ/856/68
Title:
COSMOS lens candidates with LensFlow
Short Name:
J/ApJ/856/68
Date:
08 Mar 2022 14:20:03
Publisher:
CDS
Description:
In this work, we present our machine learning classification algorithm for identifying strong gravitational lenses from wide-area surveys using convolutional neural networks; LensFlow. We train and test the algorithm using a wide variety of strong gravitational lens configurations from simulations of lensing events. Images are processed through multiple convolutional layers that extract feature maps necessary to assign a lens probability to each image. LensFlow provides a ranking scheme for all sources that could be used to identify potential gravitational lens candidates by significantly reducing the number of images that have to be visually inspected. We apply our algorithm to the HST/ACS i-band observations of the COSMOS field and present our sample of identified lensing candidates. The developed machine learning algorithm is more computationally efficient and complimentary to classical lens identification algorithms and is ideal for discovering such events across wide areas from current and future surveys such as LSST and WFIRST.
3366. COSMOS Morphological Catalog (V1.1)
ID:
ivo://CDS.VizieR/VII/265
Title:
COSMOS Morphological Catalog (V1.1)
Short Name:
VII/265
Date:
21 Oct 2021
Publisher:
CDS
Description:
The zCOSMOS field benefits of high-resolution imaging in the F814W filter from the HST-ACS (Advanced Camera for Survey). We use standard morphology classifiers, optimised for being robust against band-shifting and surface brightness dimming, and a new, objective, and automated method to convert morphological parameters into early, spiral, and irregular types. We use about 10000 galaxies down to I(AB)=22.5mag with a spectroscopic sampling rate of 33% to characterise the environment of galaxies up to z~1 from the 100kpc scales of galaxy groups up to the 100Mpc scales of the cosmic web.
3367. COSMOS Multi-Wavelength Photometry Catalog
ID:
ivo://CDS.VizieR/II/284
Title:
COSMOS Multi-Wavelength Photometry Catalog
Short Name:
II/284
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present imaging data and photometry for the COSMOS survey in 15 photometric bands between 0.3 and 2.4m. These include data taken on the Subaru 8.3m telescope, the KPNO and CTIO 4m telescopes, and the CFHT 3.6m telescope. Special techniques are used to ensure that the relative photometric calibration is better than 1% across the field of view. The absolute photometric accuracy from standard-star measurements is found to be 6%. The absolute calibration is corrected using galaxy spectra, providing colors accurate to 2% or better. Stellar and galaxy colors and counts agree well with the expected values. Finally, as the first step in the scientific analysis of these data we construct panchromatic number counts which confirm that both the geometry of the universe and the galaxy population are evolving.
3368. COSMOS photometric redshift catalog
ID:
ivo://CDS.VizieR/J/ApJ/690/1236
Title:
COSMOS photometric redshift catalog
Short Name:
J/ApJ/690/1236
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present accurate photometric redshifts (photo-z) in the 2-deg^2^ COSMOS field. The redshifts are computed with 30 broad, intermediate, and narrowbands covering the UV (Galaxy Evolution Explorer), visible near-IR (NIR; Subaru, Canada-France-Hawaii Telescope (CFHT), United Kingdom Infrared Telescope, and National Optical Astronomy Observatory), and mid-IR (Spitzer/IRAC). A {chi}^2^ template-fitting method (Le Phare) was used and calibrated with large spectroscopic samples from the Very Large Telescope Visible Multi-Object Spectrograph and the Keck Deep Extragalactic Imaging Multi-Object Spectrograph. We develop and implement a new method which accounts for the contributions from emission lines ([OII], H{beta}, H{alpha}, and Ly{alpha}) to the spectral energy distributions (SEDs). The treatment of emission lines improves the photo-z accuracy by a factor of 2.5. Comparison of the derived photo-z with 4148 spectroscopic redshifts (i.e., {Delta}z=zs-zp) indicates a dispersion of {sigma}_{Delta}z/(1+zs)_=0.007 at i^+^_AB_<22.5, a factor of 2-6 times more accurate than earlier photo-z in the COSMOS, CFHT Legacy Survey, and the Classifying Object by Medium-Band Observations-17 survey fields. At fainter magnitudes i^+^_AB_<24 and z<1.25, the accuracy is {sigma}_{Delta}z/(1+zs)_=0.012. The deep NIR and Infrared Array Camera coverage enables the photo-z to be extended to z~2, albeit with a lower accuracy ({sigma}_{Delta}z/(1+zs)_=0.006 at i^+^_AB_~24). The redshift distribution of large magnitude-selected samples is derived and the median redshift is found to range from z_m_= 0.66 at 22 <i^+^_AB_<22.5 to z_m_=1.06 at 24.5<i^+^_AB_<25. At i ^+^_AB_<26.0, the multiwavelength COSMOS catalog includes approximately 607,617 objects. The COSMOS-30 photo-z enables the full exploitation of this survey for studies of galaxy and large-scale structure evolution at high redshift.
3369. COSMOS Photometric Redshift Catalog
ID:
ivo://irsa.ipac/COSMOS/Catalog/COSMOS-zphot
Title:
COSMOS Photometric Redshift Catalog
Short Name:
COSMOS-zphot
Date:
01 Oct 2018 20:27:21
Publisher:
NASA/IPAC Infrared Science Archive
Description:
COSMOS is an astronomical survey designed to probe the formation and evolution of galaxies as a function of cosmic time (redshift) and large scale structural environment. The survey covers a 2 square degree equatorial field with imaging by most of the major space-based telescopes (Hubble, Spitzer, GALEX, XMM, Chandra) and a number of large ground based telescopes (Subaru, VLA, ESO-VLT, UKIRT, NOAO, CFHT, and others). Over 2 million galaxies are detected, spanning 75% of the age of the universe.
3370. COSMOS Photometry Catalog January 2006
ID:
ivo://irsa.ipac/COSMOS/Catalog/COSMOS-Phot06
Title:
COSMOS Photometry Catalog January 2006
Short Name:
COSMOS-Phot06
Date:
01 Oct 2018 20:27:21
Publisher:
NASA/IPAC Infrared Science Archive
Description:
COSMOS is an astronomical survey designed to probe the formation and evolution of galaxies as a function of cosmic time (redshift) and large scale structural environment. The survey covers a 2 square degree equatorial field with imaging by most of the major space-based telescopes (Hubble, Spitzer, GALEX, XMM, Chandra) and a number of large ground based telescopes (Subaru, VLA, ESO-VLT, UKIRT, NOAO, CFHT, and others). Over 2 million galaxies are detected, spanning 75% of the age of the universe. This is an I band selected multi-color catalog for 2 square degrees centered on the COSMOS field at 10:00:28.6, +02:12:21. A detailed description of the catalog is given in Capak et. al. (2007) and it is recomended that you read this paper before using the catalog.

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