Search

Start Over Capability Type Simple Cone Search
2421. CdC2000 Bordeaux Carte du Ciel catalogue
ID:
ivo://CDS.VizieR/I/303
Title:
CdC2000 Bordeaux Carte du Ciel catalogue
Short Name:
I/303
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the CdC2000 catalogue issued from the reduction of the complete Bordeaux Carte du Ciel zone observed at the beginning of last century with the Bordeaux astrograph. This catalogue is a positional catalogue of 344780 stars covering the declination zone +11{deg}<delta<+18{deg}. The average epoch of positions is 1914.7. The data are from the 512 Carte du Ciel plates archived at the Bordeaux Observatory and scanned with the APM Cambridge automatic measuring machine. Plates have been individually reduced using the TYCHO-2 Catalogue as astrometric reference. Astrometric standard errors are about 0.10" to 0.12" on positions and 0.6 magnitudes on photographic magnitudes. A detailed study of errors and a comparison of various reduction methods are presented in order to take into account the significant propagated errors from the reference catalogue. The CdC2000 provides positions at the epoch of the plates for 50 682 TYCHO-2 stars. The associated positions are proved to be 0.11" more precise than the positions given by the Tycho-2 catalogue at the epoch of the plates. This work is part of a program of proper motion measurements in the Bordeaux Carte du Ciel zone (PM2000, Cat. <I/300>).
2422. cD clusters of galaxies. I.
ID:
ivo://CDS.VizieR/J/AJ/106/831
Title:
cD clusters of galaxies. I.
Short Name:
J/AJ/106/831
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the initial results of a spectroscopic study of a sample of cD galaxy clusters. The goal of this program is to study the dynamics of the clusters, with emphasis on determining the nature and frequency of peculiar velocity cD galaxies. In this paper we present redshifts for 611 galaxies in the fields of the rich Abell clusters A193, A399, A401, A1795, A1809, A2063, and A2124. We discuss our data reduction techniques, and compare our derived velocities with previously published values. We find a frequency of emission line galaxies of ~6% in clusters, a factor of 2-3 less than the field.
2423. cD clusters of galaxies. III.
ID:
ivo://CDS.VizieR/J/AJ/116/1529
Title:
cD clusters of galaxies. III.
Short Name:
J/AJ/116/1529
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the final observational data for a spectroscopic study of a sample of cD galaxy clusters. The goal of this program has been to study the dynamics of the clusters, with emphasis on determining the nature and frequency of peculiar-velocity cD galaxies. In this paper we present redshifts for 762 galaxies in the fields of the rich Abell clusters A779, A1691, A1749, A1767, A1837, A1927, A2067, A2079, A2089, A2199, and A2666. We also present preliminary dynamical properties for these clusters using our measured redshifts.
2424. CDD V photometry of B2 radio galaxies
ID:
ivo://CDS.VizieR/J/A+AS/142/353
Title:
CDD V photometry of B2 radio galaxies
Short Name:
J/A+AS/142/353
Date:
21 Oct 2021
Publisher:
CDS
Description:
The results of V-band CCD photometry for 72 low-luminosity radio galaxies from the B2 sample is presented. Most of these galaxies are of early type and their photometric and morphological properties are studied in the paper. We present the resulting surface brightness profiles and isophote parameters' profiles, including ellipticity, position angle, and B4, for 59 galaxies.
2425. CDFs AGNs X-ray power-law photon index
ID:
ivo://CDS.VizieR/J/AJ/135/1505
Title:
CDFs AGNs X-ray power-law photon index
Short Name:
J/AJ/135/1505
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present results from a statistical analysis of 173 bright radio-quiet active galactic nuclei (AGNs) selected from the Chandra Deep Field-North and Chandra Deep Field-South surveys (hereafter, CDFs) in the redshift range of 0.1<~<~4. We find that the X-ray power-law photon index ({Gamma}) of radio-quiet AGNs is correlated with their 2-10keV rest-frame X-ray luminosity (LX) at the >99.5% confidence level in two redshift bins: 0.3~<z~<0.96, and 1.5~<z~<3.3 and is slightly less significant in the redshift bin 0.96~<z~<1.5.
2426. CDFS survey: 2 Ms source catalogs
ID:
ivo://CDS.VizieR/J/ApJS/179/19
Title:
CDFS survey: 2 Ms source catalogs
Short Name:
J/ApJS/179/19
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present point-source catalogs for the ~2Ms exposure of the Chandra Deep Field-South (CDF-S) this is one of the two most sensitive X-ray surveys ever performed. The survey covers an area of ~436arcmin^2^ and reaches on-axis sensitivity limits of ~1.9x10^-17^ and ~1.3x10^-16^ergs/cm^2^/s for the 0.5-2.0 and 2-8keV bands, respectively. Four hundred and sixty-two X-ray point sources are detected in at least one of three X-ray bands that were searched; 135 of these sources are new compared to the previous ~1Ms CDF-S detections. Source positions are determined using centroid and matched-filter techniques; the median positional uncertainty is ~0.36". The X-ray-to-optical flux ratios of the newly detected sources indicate a variety of source types; ~55% of them appear to be active galactic nuclei, while ~45% appear to be starburst and normal galaxies. In addition to the main Chandra catalog, we provide a supplementary catalog of 86 X-ray sources in the ~2Ms CDF-S footprint that was created by merging the ~250ks Extended Chandra Deep Field-South with the CDF-S this approach provides additional sensitivity in the outer portions of the CDF-S. A second supplementary catalog that contains 30 X-ray sources was constructed by matching lower significance X-ray sources to bright optical counterparts (R<23.8) the majority of these sources appear to be starburst and normal galaxies. The total number of sources in the main and supplementary catalogs is 578. Optical R-band counterparts and basic optical and infrared photometry are provided for the X-ray sources in the main and supplementary catalogs. We also include existing spectroscopic redshifts for 224 of the X-ray sources.
2427. C2D Full CLOUDS Catalog
ID:
ivo://irsa.ipac/Spitzer/Catalog/C2D/C2D-FCLOUDS
Title:
C2D Full CLOUDS Catalog
Short Name:
C2D-FCLOUDS
Date:
01 Oct 2018 20:27:16
Publisher:
NASA/IPAC Infrared Science Archive
Description:
The Cores to Disks (C2D) Spitzer Legacy Program used all three Spitzer instruments (IRAC, MIPS, and IRS) to observe sources that span the evolutionary sequence from molecular cores to protoplanetary disks, encompassing a wide range of cloud masses, stellar masses, and star-forming environments. In addition to targeting about 150 known compact cores, it surveyed with IRAC and MIPS (3.6-70 mum) the entire areas of five of the nearest large molecular clouds for new candidate protostars and substellar objects as faint as 0.001 solar luminosities. C2D observed with IRAC and MIPS about 190 systems likely to be in the early stages of planetary system formation (ages up to about 10 Myr), probing the evolution of the circumstellar dust, the raw material for planetary cores. The Full CLOUDS Catalog provides the most complete but least reliable list of sources in the C2D CLOUDS fields (ChamaeleonII (CHA_II), Lupus (LUP), Ophiuchus (OPH), Perseus (PER) and Serpens (SER)).
2428. C2D Full CORES Catalog
ID:
ivo://irsa.ipac/Spitzer/Catalog/C2D/C2D-FCORES
Title:
C2D Full CORES Catalog
Short Name:
C2D-FCORES
Date:
01 Oct 2018 20:27:17
Publisher:
NASA/IPAC Infrared Science Archive
Description:
The Cores to Disks (C2D) Spitzer Legacy Program used all three Spitzer instruments (IRAC, MIPS, and IRS) to observe sources that span the evolutionary sequence from molecular cores to protoplanetary disks, encompassing a wide range of cloud masses, stellar masses, and star-forming environments. In addition to targeting about 150 known compact cores, it surveyed with IRAC and MIPS (3.6-70 mum) the entire areas of five of the nearest large molecular clouds for new candidate protostars and substellar objects as faint as 0.001 solar luminosities. C2D observed with IRAC and MIPS about 190 systems likely to be in the early stages of planetary system formation (ages up to about 10 Myr), probing the evolution of the circumstellar dust, the raw material for planetary cores. The Full CORES Catalog provides the most complete but least reliable list of sources in the C2D CORES fields (82 small cloud cores).
2429. C2D Full OFF-CLOUD Catalog
ID:
ivo://irsa.ipac/Spitzer/Catalog/C2D/C2D-FOFFCLOUDS
Title:
C2D Full OFF-CLOUD Catalog
Short Name:
C2D-FOFFCLOUDS
Date:
01 Oct 2018 20:27:17
Publisher:
NASA/IPAC Infrared Science Archive
Description:
The Cores to Disks (C2D) Spitzer Legacy Program used all three Spitzer instruments (IRAC, MIPS, and IRS) to observe sources that span the evolutionary sequence from molecular cores to protoplanetary disks, encompassing a wide range of cloud masses, stellar masses, and star-forming environments. In addition to targeting about 150 known compact cores, it surveyed with IRAC and MIPS (3.6-70 mum) the entire areas of five of the nearest large molecular clouds for new candidate protostars and substellar objects as faint as 0.001 solar luminosities. C2D observed with IRAC and MIPS about 190 systems likely to be in the early stages of planetary system formation (ages up to about 10 Myr), probing the evolution of the circumstellar dust, the raw material for planetary cores. The Full OFF-CLOUD Catalog provides the most complete but least reliable list of sources in the C2D OFF-CLOUDS fields (ChamaeleonII (CHA_II), Lupus (LUP), Ophiuchus (OPH), Perseus (PER) and Serpens (SER)).
2430. C2D Full STARS Catalog
ID:
ivo://irsa.ipac/Spitzer/Catalog/C2D/C2D-FSTARS
Title:
C2D Full STARS Catalog
Short Name:
C2D-FSTARS
Date:
01 Oct 2018 20:27:17
Publisher:
NASA/IPAC Infrared Science Archive
Description:
The Cores to Disks (C2D) Spitzer Legacy Program used all three Spitzer instruments (IRAC, MIPS, and IRS) to observe sources that span the evolutionary sequence from molecular cores to protoplanetary disks, encompassing a wide range of cloud masses, stellar masses, and star-forming environments. In addition to targeting about 150 known compact cores, it surveyed with IRAC and MIPS (3.6-70 mum) the entire areas of five of the nearest large molecular clouds for new candidate protostars and substellar objects as faint as 0.001 solar luminosities. C2D observed with IRAC and MIPS about 190 systems likely to be in the early stages of planetary system formation (ages up to about 10 Myr), probing the evolution of the circumstellar dust, the raw material for planetary cores. The Full STARS Catalog provides the most complete but least reliable list of sources in the C2D STARS fields (160 targeted stars).

Limit your search

more »

more »

more »

more »

more »

more »