- ID:
- ivo://CDS.VizieR/J/MNRAS/329/877
- Title:
- The CLASS blazar survey. II.
- Short Name:
- J/MNRAS/329/877
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This paper presents the optical properties of the objects selected in the CLASS blazar survey. Because an optical spectrum is now available for 70 per cent of the 325 sources present in the sample, a spectral classification, based on the appearance of the emission/absorption lines, is possible. A wide variety of optical spectral types is found. Besides `classical' BL Lacs (42), BL Lac candidates (5) and high-power (P_5GHz_>10^26^W/Hz) flat spectrum radio quasars (67), a significant number of `passive' elliptical galaxies (41) is also found. Moreover, 33 broad emission line objects with a low radio power (P(5GHz)>10^26^W/Hz) are discovered, suggesting that at least a fraction (~24-30 per cent) of low-power blazars have a broad line region. Finally, 34 objects showing only narrow emission lines, either as a result of some starburst activity in the host galaxy or as a result of the presence of an active galactic nucleus, appear in the sample.
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Search Results
- ID:
- ivo://CDS.VizieR/J/ApJ/714/1305
- Title:
- The Deep SWIRE Field (DSF) IV.
- Short Name:
- J/ApJ/714/1305
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a study of a 20cm selected sample in the Deep Spitzer Wide-area InfraRed Extragalactic Legacy Survey Very Large Array Field, reaching a 5{sigma} limiting flux density at the image center of S_1.4GHz_~13.5uJy. In a 0.6x0.6deg^2^ field, we are able to assign an optical/IR counterpart to 97% of the radio sources. Up to 11 passbands from the NUV to 4.5um are then used to sample the spectral energy distribution (SED) of these counterparts in order to investigate the nature of the host galaxies. By means of an SED template library and stellar population synthesis models, we estimate photometric redshifts, stellar masses, and stellar population properties, dividing the sample into three sub-classes of quiescent, intermediate, and star-forming galaxies. We focus on the radio sample in the redshift range 0.3<z<1.3 where we estimate to have a redshift completeness higher than 90% and study the properties and redshift evolution of these sub-populations.
- ID:
- ivo://CDS.VizieR/J/A+AS/129/399
- Title:
- The ENACS Catalogue. V.
- Short Name:
- J/A+AS/129/399
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the catalogue resulting from the ESO Nearby Abell Cluster Survey (the ENACS), which contains redshifts and magnitudes for 5634 galaxies in the directions of 107 rich, nearby southern Abell cluster candidates. We describe the contents of the catalogue and discuss the results of a comparison between the ENACS catalogue and the COSMOS Galaxy Catalogue. When cross-correlating the two catalogues we find that, at least in the areas of the ENACS clusters, the completeness of the COSMOS catalogue is somewhat lower than was estimated previously for the carefully analyzed and well-calibrated part of the COSMOS catalogue known as the Edinburgh-Durham Southern Galaxy Survey (EDSGC). The galaxy positions in the COSMOS and ENACS catalogues are found to be on the same system to within about one arcsecond. For the clusters for which the photometry in the ENACS and COSMOS catalogues is based on the same survey plates, the two magnitude scales agree very well. We confirm that the photometric calibration in the EDSGC subset of the COSMOS catalogue is of higher quality than in the EDSGC complement. The ENACS galaxy samples are unbiased subsets of the COSMOS catalogue as far as the projected galaxy distribution is concerned, except in only a few cases. We summarize how the ENACS galaxy samples are subsets of the COSMOS catalogues in the ENACS apertures, with respect to magnitude. For the ENACS catalogue as a whole, we describe the apparent incompleteness at faint magnitudes and towards higher redshifts. Finally, we provide some detailed information about the ENACS catalogue that is essential for its proper statistical use and we summarize some facts that must be remembered when selecting subsets of galaxies from it. Objects:
- ID:
- ivo://CDS.VizieR/J/ApJS/135/227
- Title:
- The FIRST bright quasar survey. III.
- Short Name:
- J/ApJS/135/227
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the results of an extension of the FIRST Bright Quasar Survey (FBQS) to the South Galactic cap, and to a fainter optical magnitude limit. Radio source counterparts with SERC R magnitudes brighter than 18.9 which meet the other FBQS criteria are included. We supplement this list with a modest number of additional objects to test our completeness for quasars with extended radio morphologies. The survey covers 589deg^2^ in two equatorial strips in the southern cap. We have obtained spectra for 86% of the 522 candidates and find 321 radio-selected quasars of which 264 are reported here for the first time. A comparison of this fainter sample with the FBQS sample shows the two to be generally similar. Fourteen new broad absorption line (BAL) quasars are included in this sample. When combined with the previously identified BAL quasars in our earlier papers, we can discern a break in the frequency of BAL quasars with radio loudness, namely that the relative number of high-ionization BAL quasars drops by a factor of 4 for quasars with a radio-loudness parameter R*>100.
- ID:
- ivo://CDS.VizieR/J/ApJS/199/24
- Title:
- The first three quarters of Kepler mission
- Short Name:
- J/ApJS/199/24
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the results of a search for potential transit signals in the first three quarters of photometry data acquired by the Kepler mission. The targets of the search include 151722 stars which were observed over the full interval and an additional 19132 stars which were observed for only one or two quarters. From this set of targets we find a total of 5392 detections which meet the Kepler detection criteria: those criteria are periodicity of signal, an acceptable signal-to-noise ratio, and a composition test which rejects spurious detections which contain non-physical combinations of events. The detected signals are dominated by events with relatively low signal-to-noise ratio and by events with relatively short periods. The distribution of estimated transit depths appears to peak in the range between 40 and 100 parts per million, with a few detections down to fewer than 10 parts per million. The detections exhibit signal-to-noise ratios from 7.1{sigma}, which is the lower cutoff for detections, to over 10000{sigma}, and periods ranging from 0.5 days, which is the lower cutoff used in the procedure, to 109 days, which is the upper limit of achievable periods given the length of the data set and the criteria used for detections. The detected signals are compared to a set of known transit events in the Kepler field of view which were derived by a different method using a longer data interval; the comparison shows that the current search correctly identified 88.1% of the known events.
- ID:
- ivo://CDS.VizieR/I/353
- Title:
- The Guide Star Catalog, Version 2.4.2 (GSC2.4.2)
- Short Name:
- I/353
- Date:
- 01 Mar 2022
- Publisher:
- CDS
- Description:
- The GSC II is an all-sky catalog based on 1" resolution scans of the photographic Sky Survey plates, at two epochs and three bandpasses, from the Palomar and UK Schmidt telescopes (DSS). Positions, magnitudes, and classifications are produced for all objects on each plate. The objects are then loaded into the COMPASS database, where multiple observations of the same object are matched and assigned a unique name. GSC 2.4.1 is the first release of the augmented GSC by adding object parameters (and new objects) from deeper surveys. - GSC 2.4.0 - UCAC5 (proper motions for GAIA sources - no new objects) - APASS dr9 (optical photometry - no new objects added) - 2MASS+6x (IR photometry, classifications + positions of new objects) - SDSS dr13 (optical photometry, classifications + positions of new objects) - VISTA - VHS dr4 (IR photometry, classifications + positions of new objects) - VISTA - VIKING dr2 (IR photometry, classifications + positions of new objects) - VST - ATLAS dr3 (optical photometry, classifications + positions of new objects) - VST - KIDS dr3 (optical photometry, classifications + positions of new objects) GSC 2.4.1.2 Added the following catalogs - PanSTARRS dr1/2 - SMSS dr1 - WISE - GALEX - ultraVISTA GSC 2.4.2 has the astrometric information updated to GAIAdr2 and became the default operational catalog mid-December 2020.
- ID:
- ivo://CDS.VizieR/I/305
- Title:
- The Guide Star Catalog, Version 2.3.2 (GSC2.3)
- Short Name:
- I/305
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The GSC II is an all-sky catalog based on 1" resolution scans of the photographic Sky Survey plates, at two epochs and three bandpasses, from the Palomar and UK Schmidt telescopes (DSS). Positions, magnitudes, and classifications are produced for all objects on each plate. The objects are then loaded into the COMPASS database, where multiple observations of the same object are matched and assigned a unique name. The GSC2.3 has no magnitude limit. The parameters of the bright objects, overexposed on the Schmidt plates, are taken from the Tycho-2 (I/259) catalog. The computed proper motions are not yet publically available because of 10mas/year systematic errors discovered for the southern hemisphere that are still under investigation.
- ID:
- ivo://CDS.VizieR/I/271
- Title:
- The Guide Star Catalog, Version 2.2 (GSC2.2)
- Short Name:
- I/271
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The GSC II is an all-sky catalog based on 1" resolution scans of the photographic Sky Survey plates, at two epochs and three bandpasses, from the Palomar and UK Schmidt telescopes (DSS). Positions, magnitudes, and classifications are produced for all objects on each plate. The objects are then loaded into the COMPASS database, where multiple observations of the same object are matched and assigned a unique name. The GSC2.2 is a preliminary version of GSC II generated to support telescope operations at the GEMINI and VLT telescopes. The magnitude limits are 18.5 in photographic F (red) or 19.5 in photographic J (blue) or V. The parameters of the bright objects, overexposed on the Schmidt plates, are taken from the Tycho-2 (I/259) catalog. The final version (GSC 2.3), expected to be released in 2002, will also contain proper motions.
- ID:
- ivo://CDS.VizieR/VII/273
- Title:
- The Half Million Quasars (HMQ) catalogue
- Short Name:
- VII/273
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A quasar catalogue is presented with a total of 510764 objects including 424748 type 1 QSOs and 26623 type 1 AGN complete from the literature to 25 January 2015. Also included are 25015 high-confidence SDSS-based photometric quasars with radio/X-ray associations, 1595 BL Lac objects, and 32783 type 2 objects. Each object is displayed with arcsecond-accurate astrometry, red and blue photometry, redshift, citations, and radio and X-ray associations where present. Also, 114 new spectroscopically confirmed quasars are presented.
- ID:
- ivo://CDS.VizieR/J/A+AS/134/483
- Title:
- The Hamburg Quasar Survey. III.
- Short Name:
- J/A+AS/134/483
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Table 3 lists for all new QSOs the position for equinox 2000.0 with an accuracy ~2", the B magnitude obtained from the Schmidt plates with an accuracy ~<0.5 (see Paper I, Hagen et al., 1995A&AS..111..195H), the redshift, and the number of the campaign of Table 2 in which the data were obtained.
