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1661. The BAaDE SiO maser survey at 86GHz with ALMA
ID:
ivo://CDS.VizieR/J/ApJS/244/25
Title:
The BAaDE SiO maser survey at 86GHz with ALMA
Short Name:
J/ApJS/244/25
Date:
21 Oct 2021
Publisher:
CDS
Description:
We report on the first 1432 sources observed using the Atacama Large Millimeter/submillimeter Array, from the Bulge Asymmetries and Dynamical Evolution survey, which aims to obtain tens of thousands of line-of-sight velocities from SiO masers in Asymptotic Giant Branch (AGB) stars in the Milky Way. A 71% detection rate of 86GHz SiO masers is obtained from the infrared color-selected sample and increases to 80% when considering the likely oxygen-rich stars using Midcourse Space Experiment colors isolated in a region where [D]-[E]<=1.38. Based on Galactic distributions, the presence of extended CS emission, and likely kinematic associations, the population of sources with [D]-[E]>1.38 probably consists of young stellar objects, or alternatively, of planetary nebulae. For the SiO detections, we examined whether individual SiO transitions provide comparable stellar line-of-sight velocities and found that any SiO transition is suitable for determining a stellar AGB line-of-sight velocity. Finally, we discuss the relative SiO detection rates and line strengths in the context of current pumping models.
1662. The BGPS. X. Dense molecular gas
ID:
ivo://CDS.VizieR/J/ApJS/209/2
Title:
The BGPS. X. Dense molecular gas
Short Name:
J/ApJS/209/2
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Bolocam Galactic Plane Survey (BGPS) is a 1.1 mm continuum survey of dense clumps of dust throughout the Galaxy covering 170deg^2^. We present spectroscopic observations using the Heinrich Hertz Submillimeter Telescope of the dense gas tracers, HCO^+^ and N_2_H^+^3-2, for all 6194 sources in the BGPS v1.0.1 catalog between 7.5{deg}<=l<=194{deg}. This is the largest targeted spectroscopic survey of dense molecular gas in the Milky Way to date. We find unique velocities for 3126 (50.5%) of the BGPS v1.0.1 sources observed. Strong N_2_H^+^ 3-2 emission (T_mb_>0.5K) without HCO^+^ 3-2 emission does not occur in this catalog. We characterize the properties of the dense molecular gas emission toward the entire sample. HCO^+^ is very sub-thermally populated and the 3-2 transitions are optically thick toward most BGPS clumps. The median observed line width is 3.3 km/s consistent with supersonic turbulence within BGPS clumps. We find strong correlations between dense molecular gas integrated intensities and 1.1 mm peak flux and the gas kinetic temperature derived from previously published NH_3_observations. These intensity correlations are driven by the sensitivity of the 3-2 transitions to excitation conditions rather than by variations in molecular column density or abundance. We identify a subset of 113 sources with stronger N_2_H^+^ than HCO^+^ integrated intensity, but we find no correlations between the N_2_H^+^/HCO^+^ ratio and 1.1 mm continuum flux density, gas kinetic temperature, or line width. Self-absorbed profiles are rare (1.3%).
1663. The Bolocam Galactic Plane Survey. II.
ID:
ivo://CDS.VizieR/J/ApJS/188/123
Title:
The Bolocam Galactic Plane Survey. II.
Short Name:
J/ApJS/188/123
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a catalog of 8358 sources extracted from images produced by the Bolocam Galactic Plane Survey (BGPS). The BGPS is a survey of the millimeter dust continuum emission from the northern Galactic plane. The catalog sources are extracted using a custom algorithm, Bolocat, which was designed specifically to identify and characterize objects in the large-area maps generated from the Bolocam instrument. The catalog products are designed to facilitate follow-up observations of these relatively unstudied objects. The catalog is 98% complete from 0.4Jy to 60Jy over all object sizes for which the survey is sensitive (<3.5'). We find that the sources extracted can best be described as molecular clumps-large dense regions in molecular clouds linked to cluster formation. We find that the flux density distribution of sources follows a power law with dN/dS{prop.to}S^-2.4+/-0.1^ and that the mean Galactic latitude for sources is significantly below the midplane: <b>=(-0.095+/-0.001{deg}).
1664. The 3C and 3CR Catalogues
ID:
ivo://CDS.VizieR/VIII/1A
Title:
The 3C and 3CR Catalogues
Short Name:
VIII/1A
Date:
21 Oct 2021
Publisher:
CDS
Description:
The 3C Catalog is the result of observations with the Cambridge four-element interferometer at a frequency of 159MHz, and contains 471 sources between declinations -22 and +71degrees, with a flux density larger than 8Jy. The Revised version of the 3C (3CR) is based on new observations at a frequency of 178MHz, and represents a survey of all sources North of -05degrees with a flux density brighter than 9Jy, except in the areas near the ridge of galactic emission. The original numbering system has been preserved.
1665. The 5C6 and 5C7 surveys of radio sources.
ID:
ivo://CDS.VizieR/J/MNRAS/182/273
Title:
The 5C6 and 5C7 surveys of radio sources.
Short Name:
J/MNRAS/182/273
Date:
21 Oct 2021
Publisher:
CDS
Description:
This catalog contains the 5C6 and 5C7 radio surveys at 408 and 1407 MHz done with the with the One-Mile telescope at Cambridge (UK). The 5C6 survey of radio sources, made at 408 MHz (HPBW 80"x151") and 1407 MHz (HPBW 23"x44") was centered on 02:14 +32:00' (B1950) and contains 297 sources stronger than 10 mJy at 408 MHz and 1.5 mJy at 1407 MHz. The flux densities are on the KPW scale (Kellermann et al. 1969ApJ...157....1K) and were based on 3C147 and 3C380. Positions, positional errors, flux density information, and descriptions of optical objects visible on the Palomar Sky Survey within about 20" of the radio sources are given. The 5C7 survey of radio sources, made at 408 MHz (HPBW 80"x176") and 1407 MHz (HPBW 23"x51") was centered at 08:17 +27:00 (B1950) and contains 281 sources stronger than 10 mJy at 408 MHz and 1.5 mJy at 1407 MHz. The flux densities are on the KPW scale (Kellermann et al. 1969ApJ...157....1K), and were based on 3C147 and 3C380. Positions, positional errors, flux density information, and descriptions of optical objects visible on the Palomar Sky Survey within about 20" of the radio sources are given.
1666. The 5C13 deep radio survey
ID:
ivo://CDS.VizieR/J/MNRAS/272/699
Title:
The 5C13 deep radio survey
Short Name:
J/MNRAS/272/699
Date:
21 Oct 2021
Publisher:
CDS
Description:
A deep 0.4-GHz survey of a 4deg-diameter region in Hercules is reported. 232 sources brighter than 9.5 mJy were detected. In a simultaneous 1.4-GHz survey of the concentric area 1deg in diameter, 45 sources brighter than 1.7 mJy were detected. The differential 0.4-GHz radio source count is presented; it is in good agreement with that from other 5C surveys. This survey brings to 3220 the number of 0.4-GHz sources catalogued by the published 5C surveys.
1667. The CGPS 1420 MHz catalog of compact sources
ID:
ivo://CDS.VizieR/J/AJ/153/113
Title:
The CGPS 1420 MHz catalog of compact sources
Short Name:
J/AJ/153/113
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a catalog of compact sources of radio emission at 1420MHz in the northern Galactic plane from the Canadian Galactic Plane Survey. The catalog contains 72758 compact sources with an angular size less than 3' within the Galactic longitude range 52{deg}<l<192{deg} down to a 5{sigma} detection level of ~1.2mJy. Linear polarization properties are included for 12368 sources with signals greater than 4{sigma}_QU_ in the Canadian Galactic Plane Survey (CGPS) Stokes Q and U images at the position of the total intensity peak. We compare CGPS flux densities with cataloged flux densities in the Northern VLA Sky Survey catalog for 10897 isolated unresolved sources with CGPS flux density greater than 4mJy to search for sources that show variable flux density on timescales of several years. We identify 146 candidate variables that exhibit high fractional variations between the two surveys. In addition, we identify 13 candidate transient sources that have CGPS flux density above 10mJy but are not detected in the Northern VLA Sky Survey.
1668. The CLASS blazar survey. I.
ID:
ivo://CDS.VizieR/J/MNRAS/326/1455
Title:
The CLASS blazar survey. I.
Short Name:
J/MNRAS/326/1455
Date:
21 Oct 2021
Publisher:
CDS
Description:
This paper presents a new complete and well-defined sample of flat-spectrum radio sources (FSRS) selected from the Cosmic Lens All-Sky Survey (CLASS), with the further constraint of a bright (mag<=17.5) optical counterpart. The sample has been designed to produce a large number of low-luminosity blazars in order to test the current unifying models in the low-luminosity regime. In this first paper the new sample is presented and the radio properties of the 325 sources contained therein are discussed.
1669. The CLASS blazar survey. III.
ID:
ivo://CDS.VizieR/J/MNRAS/348/937
Title:
The CLASS blazar survey. III.
Short Name:
J/MNRAS/348/937
Date:
21 Oct 2021
Publisher:
CDS
Description:
We discuss the properties of the sources in the CLASS blazar survey, which aims at the selection of low radio power (P_5GHz_<10^25^W/Hz) blazars. We use Very Large Array (VLA) data from available catalogues and from our own observations to constrain the radio core-dominance of the sample which, together with the flat radio spectral index, is a signature of the blazar activity. X-ray data from the ROSAT All Sky Survey were also collected in order to constrain the radio-to-X-ray luminosity ratio of the sources.
1670. The CLASS BL Lac sample
ID:
ivo://CDS.VizieR/J/MNRAS/430/2464
Title:
The CLASS BL Lac sample
Short Name:
J/MNRAS/430/2464
Date:
21 Oct 2021
Publisher:
CDS
Description:
This paper presents a new sample of BL Lac objects selected from a deep (30mJy) radio survey of flat spectrum radio sources (the CLASS blazar survey). The sample is one of the largest well-defined samples in the low-power regime with a total of 130 sources of which 55 satisfy the 'classical' optical BL Lac selection criteria, and the rest have indistinguishable radio properties. The primary goal of this study is to establish the radio luminosity function (RLF) on firm statistical ground at low radio luminosities where previous samples have not been able to investigate. The gain of taking a peek at lower powers is the possibility to search for the flattening of the luminosity function which is a feature predicted by the beaming model but which has remained elusive to observational confirmation. In this study, we extend for the first time the BL Lac RLF down to very low radio powers ~10^22^W/Hz, i.e. two orders of magnitude below the RLF currently available in the literature. In the process, we confirm the importance of adopting a broader, and more physically meaningful set of classification criteria to avoid the systematic missing of low-luminosity BL Lacs. Thanks to the good statistics we confirm the existence of weak but significant positive cosmological evolution for the BL Lac population, and we detect, for the first time the flattening of the RLF at L~10^25^W/Hz in agreement with the predictions of the beaming model.