- ID:
- ivo://CDS.VizieR/VII/290
- Title:
- The Million Quasars (Milliquas) catalogue, version 7.2
- Short Name:
- VII/290
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This is a compendium of 829666 type-I QSOs and AGN, largely complete from the literature to 30 April 2021 including SDSS-DR16 quasars and VLASS radio. Also included are 703348 candidates which are calculated as 60%-100% likely to be quasars, including 225051 which are radio/X-ray associated. Type-II and Bl Lac objects are also included, bringing the total count to 1573824. Gaia-DR2 astrometry is used where available, amounting to ~66% of all objects. Changes from version 7.1 are: (1) Quasars added from publications to 30 April 2021. (2) The VLASS Quick Look radio catalog is included, which adds 34189 new radio core associations and 6793 probable double radio lobe associations. (3) Ongoing audits of SDSS & LAMOST quasars have led to a few additions & drops. Some WISEA-supported SDSS/LAMOST pipeline quasars are now accepted which were otherwise marginal. Also some likely galaxies removed. Low-confidence/quality or questionable objects (so deemed by their researchers) are not included in Milliquas. Additional quality cuts can apply as detailed in the HMQ paper (Flesch, 2015PASA...32...10F). Full QSO/AGN classification is via spectral lines, thus hidden / occluded objects may be absent from Milliquas. Two NIQs offset <2-arcsecs can be reported as a single object if within the same host. The aim here is to present one unique reliable object per each data row. The catalog format is simple, each object is shown as one line bearing the J2000 coordinates, its original name, object class, red and blue optical magnitudes, PSF class, redshift, the citations for the name and redshift, plus up to four radio/X-ray identifiers where applicable. Please cite as Milliquas v7.2, Flesch, E.W. 2021, arXiv:2105.12985 or as Milliquas v7.2 (2021) update, Flesch, E.W. 2015PASA...32...10F. Questions/comments/praise/complaints may be directed to me at eric(at)flesch.org.
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- ID:
- ivo://CDS.VizieR/VII/280
- Title:
- The Million Quasars (Milliquas) catalog (V5.2)
- Short Name:
- VII/280
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This is a compendium of 607,208 type-I QSOs and AGN, largely complete from the literature to 5-August-2017, including the release of SDSS-DR14. Also included are ~1.35M high-confidence (80%+ likelihood) quasar candidates from the NBCKDE, NBCKDE-v3, XDQSO, AllWISE and Peters photometric quasar catalogs (citations in Note 7 below) and from all-sky radio/X-ray associated objects which are calculated here. Type-II and Bl Lac objects are also included, bringing the total count to 1,998,464. Changes from version 5.1 are: (1) SDSS-DR14 and SDSS-DR14Q have been added, using the processing rules from the Half Million Quasars catalog (HMQ: Flesch 2015PASA...32...10F). (2) WISE quasar candidates have been added from Secrest et al, 2015, Cat. J/ApJS/221/12; these are ~430K candidates over the whole sky for which 2-color optical objects were found within a 2-arcsec radius. They have been processed into pQSOs from calibration against the SDSS-DR12Q multi-class superset, and photometric redshifts obtained using the four-color based method from the HMQ appendix 2. The four colors used were B-R, R-W1, W1-W2 & W2-W3. (3) Type-II narrow emission-line galaxies, (NELGs, class='N') are added as the luminosity class corresponding to the type-I AGN galaxies. High-luminosity type-II NLAGN (class='K') correspond to the type-I quasars. The NLAGN/NELG divider is the same luminosity/psf function which separates QSOs from AGNs. Type-II NELGs include unquantified contamination by LINERs and probably a few starbursts which eluded removal, so it serves as a catch-all category presented for completeness, rather than as a strict type-II class. (4) Small publications to 5 August 2017 have been added. (5) Positional fixes (of about 2 arcsec) have been applied to ~150 objects. Low-confidence or questionable objects (so deemed by their researchers) are not included in Milliquas. Additional quality cuts can be applied as detailed in Flesch 2015PASA...32...10F). Multiple lensed images are excluded and only the brightest one kept. The aim here is to present one unique reliable object per each data row. The catalog format is simple, each object is shown as one line bearing the J2000 coordinates, its original name, object class, red and blue optical magnitudes, PSF class, redshift, the citations for the name and redshift, plus up to four radio/X-ray identifiers where applicable. This catalog can be cited as Milliquas, Flesch E., 2015PASA...32...10F which was the published version of this catalog as at 2015 after the release of SDSS-DR12. Questions/comments/praise/complaints may be directed to me at eric(at)flesch.org.
21873. Themis Family
- ID:
- ivo://CDS.VizieR/J/A+AS/134/463
- Title:
- Themis Family
- Short Name:
- J/A+AS/134/463
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Observational circumstances of 36 members of the Themis family observed at the 1.52m telescope of ESO (La Silla) under the agreement with the CNPq-Observatorio Nacional (Brazil). File Summary:
- ID:
- ivo://CDS.VizieR/VIII/52B
- Title:
- The MIT-Green Bank 5GHz Survey
- Short Name:
- VIII/52B
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The MIT-Green Bank 5GHz survey catalog was produced from four separate surveys with the National Radio Astronomy Observatory (NRAO) 91m transit telescope (Bennett et al., 1986ApJS...61....1B (MG1); Langston et al., 1990ApJS...72..621L (MG2); Griffith et al., 1990ApJS...74..129G (MG3); Griffith et al. 1991ApJS...75..801G (MG4)). The sky coverage of the various surveys is: 00h < RAB < 24h, -00d30'13" < DECB < +19d29'47" for MG1; 04h < RAJ < 21h, +17.0d < DECJ < +39d09' for MG2; 16h30m < RAB < 05h, +17d < DECB < +39d09' for MG3; and 15h30m < RAB < 02h30m, +37.00d < DECB < +50d58'48" for MG4; where RAB and DECB refer to B1950 coordinates, and RAJ and DECJ refer to J2000 coordinates. The catalog contains 20344 sources detected with a signal-to-noise ratio greater than 5 and 3836 possible detections (MG1) with a signal-to-noise ratio less than 5. Spectral indices are computed for MG1 sources also identified in the Texas 365MHz survey (Douglas et al. 1980), and for MG1-MG4 sources also identified in the NRAO 1400MHz Survey (Condon and Broderick 1985).
21875. The Miyun 232 MHz survey. I
- ID:
- ivo://CDS.VizieR/J/A+AS/99/545
- Title:
- The Miyun 232 MHz survey. I
- Short Name:
- J/A+AS/99/545
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This catalogue contains a new meter-wave survey of the sky region north of declination 30{deg}, carried out with the Miyun 232 MHz SSSynthesis Radio Telescope (MSRT) at HPBW 3.8' x 3.8' cosec(dec). Results from two fields are presented here; the fields are 8 degrees on a side, centered at 0041+41.2 and 0700+35.0. The accuracy of flux determination is limited by background fluctuation which is about 30 mJy. The catalogue is complete for sources with flux greater than 0.25 Jy. The total number of sources listed in the catalogue is 687.
21876. The mJIVE-20 catalog
- ID:
- ivo://CDS.VizieR/J/AJ/147/14
- Title:
- The mJIVE-20 catalog
- Short Name:
- J/AJ/147/14
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the description and early results of the mJy Imaging VLBA Exploration at 20cm (mJIVE-20). mJIVE-20 is a large project on the Very Long Baseline Array which is systematically inspecting a large sample of mJy radio sources, pre-selected from the Faint Images of the Radio Sky at Twenty cm (FIRST) survey made with the Very Large Array, to identify any compact emission that may be present. The survey is being undertaken using filler time on the VLBA, which utilizes short segments scheduled in bad weather and/or with a reduced number of antennas, during which no highly rated science projects can be scheduled. The newly available multifield capability of the VLBA makes it possible for us to inspect of the order of 100 sources per hour of observing time with a 6.75{sigma} detection sensitivity of approximately 1mJy/beam. The results of the mJIVE-20 survey are made publicly available as soon as the data are calibrated. After 18 months of observing, over 20000 FIRST sources have been inspected, with 4336 very long baseline interferometry detections. These initial results suggest that within the range 1-200mJy, fainter sources are somewhat more likely to be dominated by a very compact component than brighter sources. Over half of all arcsecond-scale mJy radio sources contain a compact component, although the fraction of sources that are dominated by milliarcsecond scale structure (where the majority of the arcsecond scale flux is recovered in the mJIVE-20 image) is smaller at around 30%-35%, increasing toward lower flux densities. Significant differences are seen depending on the optical classification of the source. Radio sources with a stellar/point-like counterpart in the Sloan Digital Sky Survey (SDSS) are more likely to be detected overall, but this detection likelihood appears to be independent of the arcsecond-scale radio flux density. The trend toward higher radio compactness for fainter sources is confined to sources that are not detected in SDSS or that have counterparts classified as galaxies. These results are consistent with a unification model of active galactic nuclei in which less luminous sources have on average slower radio jets, with lower Doppler suppression of compact core emission over a wider range of viewing angles.
- ID:
- ivo://CDS.VizieR/J/A+A/549/A96
- Title:
- The mm and sub-mm spectra of 13C-glycolaldehydes
- Short Name:
- J/A+A/549/A96
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Glycolaldehyde (CH_2_OHCHO) is the simplest sugar and an important intermediate in the path toward forming more complex biologically relevant molecules. Astronomical surveys of interstellar molecules, such as those that are being available with the very sensitive ALMA telescope, require preliminary laboratory investigations of the microwave and submillimeter-wave spectra of molecular species, including new isotopologues, to identify these in the interstellar media.
- ID:
- ivo://CDS.VizieR/J/MNRAS/470/539
- Title:
- The MOA-II eclipsing binary catalogue
- Short Name:
- J/MNRAS/470/539
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the first catalogue of eclipsing binaries in two MOA (Microlensing Observations in Astrophysics) fields towards the Galactic bulge, GB9 and GB10, in which over 8000 candidates, mostly contact and semidetached binaries of periods <1d, were identified. In this paper, the light curves of a small number of interesting candidates, including eccentric binaries, binaries with noteworthy phase modulations and eclipsing RS Canum Venaticorum type stars, are shown as examples. In addition, we identified three triple object candidates by detecting the light-travel-time effect in their eclipse time variation curves.
- ID:
- ivo://CDS.VizieR/J/AJ/131/100
- Title:
- The Molonglo Southern 4Jy sample. I
- Short Name:
- J/AJ/131/100
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have defined a complete sample of 228 southern radio sources at 408MHz with integrated flux densities S(408)>4.0Jy, Galactic latitude |b|>10{deg}, and declination -85{deg}<{delta}<-30{deg}. The main finding survey used was the Molonglo Reference Catalogue (Cat. <VIII/16>). Sources in the sample were imaged at 843MHz with the Molonglo Observatory Synthesis Telescope to obtain positions accurate to about 1", as well as flux densities and angular sizes.
- ID:
- ivo://CDS.VizieR/J/AJ/131/114
- Title:
- The Molonglo Southern 4Jy sample. II
- Short Name:
- J/AJ/131/114
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Of the 228 sources in the Molonglo Southern 4Jy sample (MS4, Cat. J/AJ/131/100), the 133 with angular sizes <35" have been imaged at 5GHz at 2"-4" resolution with the Australia Telescope Compact Array. More than 90% of the sample has been reliably optically identified, either on the plates of the UK Schmidt Southern Sky Survey or on R-band CCD images made with the Anglo-Australian Telescope.
