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1422. RAVE 3rd data release
- ID:
- ivo://CDS.VizieR/III/265
- Title:
- RAVE 3rd data release
- Short Name:
- III/265
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the third data release of the RAdial Velocity Experiment (RAVE) which is the first milestone of the RAVE project, releasing the full pilot survey. The catalog contains 83,072 radial velocity measurements for 77,461 stars in the southern celestial hemisphere, as well as stellar parameters for 39,833 stars. This paper describes the content of the new release, the new processing pipeline, as well as an updated calibration for the metallicity based upon the observation of additional standard stars. Spectra will be made available in a future release. The data release can be accessed via the RAVE Web site http://www.rave-survey.org.
1423. RAVE second data release
- ID:
- ivo://CDS.VizieR/III/257
- Title:
- RAVE second data release
- Short Name:
- III/257
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the second data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities and stellar atmosphere parameters (temperature, metallicity, surface gravity, and rotational velocity) of up to one million stars using the 6dF multi-object spectrograph on the 1.2m UK Schmidt Telescope of the Anglo-Australian Observatory (AAO). The RAVE program started in 2003, obtaining medium resolution spectra (median R=7500) in the Ca-triplet region (8410-8795{AA}) for southern hemisphere stars drawn from the Tycho-2 and SuperCOSMOS catalogues, in the magnitude range 9<I<12. Following the first data release, the current release doubles the sample of published radial velocities, now containing 51829 radial velocities for 49327 individual stars observed on 141 nights between 2003 April 11 and 2005 March 31. Comparison with external data sets shows that the new data collected since 2004 April 3 show a standard deviation of 1.3km/s, about twice as good as for the first data release. For the first time, this data release contains values of stellar parameters from 22407 spectra of 21121 individual stars. They were derived by a penalized chi-square method using an extensive grid of synthetic spectra calculated from the latest version of Kurucz stellar atmosphere models. From comparison with external data sets, our conservative estimates of errors of the stellar parameters for a spectrum with an average signal-to-noise ratio (S/N) of ~40 are 400K in temperature, 0.5dex in gravity, and 0.2dex in metallicity. We note however that, for all three stellar parameters, the internal errors estimated from repeat RAVE observations of 855 stars are at least a factor 2 smaller. We demonstrate that the results show no systematic offsets if compared to values derived from photometry or complementary spectroscopic analyses. The data release includes proper motions from Starnet2, Tycho-2, and UCAC2 catalogs and photometric measurements from Tycho-2 USNO-B, DENIS, and 2MASS. The data release can be accessed via the RAVE Web site: http://www.rave-survey.org and through CDS.
1424. RAVE 6th data release
- ID:
- ivo://CDS.VizieR/III/283
- Title:
- RAVE 6th data release
- Short Name:
- III/283
- Date:
- 22 Feb 2022
- Publisher:
- CDS
- Description:
- The Radial Velocity Experiment (RAVE) is a magnitude-limited (9<I<12) spectroscopic survey of Galactic stars randomly selected in Earth's southern hemisphere. The RAVE medium-resolution spectra (R~7500) cover the Ca-triplet region (8410-8795{AA}). The sixth and final data release (DR6) is based on 518387 observations of 451783 unique stars. RAVE observations were taken between 2003 April 12 and 2013 April 4. Here we present the genesis, setup, and data reduction of RAVE as well as wavelength-calibrated and flux-normalized spectra and error spectra for all observations in RAVE DR6. Furthermore, we present derived spectral classification and radial velocities for the RAVE targets, complemented by cross-matches with Gaia DR2 and other relevant catalogs. A comparison between internal error estimates, variances derived from stars with more than one observing epoch, and a comparison with radial velocities of Gaia DR2 reveals consistently that 68% of the objects have a velocity accuracy better than 1.4km/s, while 95% of the objects have radial velocities better than 4.0km/s. We present part 2 of the sixth and final Data Release (DR6) of the Radial Velocity Experiment (RAVE), a magnitude-limited (9<I<12) spectroscopic survey of Galactic stars randomly selected in Earth's southern hemisphere. The RAVE medium-resolution spectra (R~7500) cover the Ca triplet region (8410-8795{AA}) and span the complete time frame from the start of RAVE observations on 2003 April 12 to their completion on 2013 April 4. In the second of two publications, we present the data products derived from 518,387 observations of 451,783 unique stars using a suite of advanced reduction pipelines focusing on stellar atmospheric parameters, in particular purely spectroscopically derived stellar atmospheric parameters (Teff, logg, and the overall metallicity), enhanced stellar atmospheric parameters inferred via a Bayesian pipeline using Gaia DR2 astrometric priors, and asteroseismically calibrated stellar atmospheric parameters for giant stars based on asteroseismic observations for 699 K2 stars. In addition, we provide abundances of the elements Fe, Al, and Ni, as well as an overall [alpha/Fe] ratio obtained using a new pipeline based on the GAUGUIN optimization method that is able to deal with variable signal-to-noise ratios. The RAVE DR6 catalogs are cross-matched with relevant astrometric and photometric catalogs, and are complemented by orbital parameters and effective temperatures based on the infrared flux method.
1425. RAVE 4th data release
- ID:
- ivo://CDS.VizieR/III/272
- Title:
- RAVE 4th data release
- Short Name:
- III/272
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the stellar atmospheric parameters (effective temperature, surface gravity, overall metallicity), radial velocities, individual abundances, and distances determined for 425,561 stars, which constitute the fourth public data release of the RAdial Velocity Experiment (RAVE). The stellar atmospheric parameters are computed using a new pipeline, based on the algorithms of MATISSE and DEGAS. The spectral degeneracies and the Two Micron All Sky Survey photometric information are now better taken into consideration, improving the parameter determination compared to the previous RAVE data releases. The individual abundances for six elements (magnesium, aluminium, silicon, titanium, iron, and nickel) are also given, based on a special-purpose pipeline that is also improved compared to that available for the RAVE DR3 and Chemical DR1 data releases. The data release can also be accessed via the RAVE Web site http://www.rave-survey.org.
1426. RAVE 5th data release
- ID:
- ivo://CDS.VizieR/III/279
- Title:
- RAVE 5th data release
- Short Name:
- III/279
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Data Release 5 (DR5) of the Radial Velocity Experiment (RAVE) is the fifth data release from a magnitude-limited (9<I<12) survey of stars randomly selected in the southern hemisphere. The RAVE medium-resolution spectra (R=7500) covering the Ca-triplet region (8410-8795A) span the complete time frame from the start of RAVE observations in 2003 to their completion in 2013. Radial velocities from 520,781 spectra of 457,588 unique stars are presented, of which 215,590 unique stars have parallaxes and proper motions from the Tycho-Gaia astrometric solution (TGAS) in Gaia DR1. For our main DR5 catalog, stellar parameters (effective temperature, surface gravity, overall metallicity) are computed using the RAVE DR4 stellar pipeline, but calibrated using recent K2 Campaign 1 seismic gravities and Gaia benchmark stars, as well as results obtained from high-resolution studies. Also included are temperatures from the Infrared Flux Method, and we provide a catalogue of red giant stars in the dereddened color (J-Ks)0 interval (0.50,0.85) for which the gravities were calibrated based only on seismology. Further data products for sub-samples of the RAVE stars include individual abundances for Mg, Al, Si, Ca, Ti, Fe, and Ni, and distances found using isochrones. Each RAVE spectrum is complemented by an error spectrum, which has been used to determine uncertainties on the parameters.
1427. RBSC-NVSS sample. I.
- ID:
- ivo://CDS.VizieR/J/ApJS/129/547
- Title:
- RBSC-NVSS sample. I.
- Short Name:
- J/ApJS/129/547
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We cross-identified the ROSAT Bright Source Catalog (RBSC, Cat. <IX/10>) and the NRAO VLA Sky Survey (NVSS, Cat. <VIII/65>) to construct the RBSC-NVSS sample of the brightest X-ray sources (>=0.1 counts/s~10^-12^erg/cm^2^/s in the 0.1-2.4keV band) that are also radio sources (S>=2.5mJy at 1.4GHz) in the 7.8sr of extragalactic sky with |b|>15{deg} and {delta}>-40{deg}. The sky density of NVSS sources is low enough that they can be reliably identified with RBSC sources having rms positional uncertainties >=10". We used the more accurate radio positions to make reliable X-ray/radio/optical identifications down to the POSS plate limits. We obtained optical spectra for many of the bright identifications lacking published redshifts. The resulting X-ray/radio sample is unique in its size (1557 objects), composition (a mixture of nearly normal galaxies, Seyfert galaxies, quasars, and clusters), and low average redshift [<z>~0.1]
- ID:
- ivo://CDS.VizieR/J/other/AstBu/65.42
- Title:
- RCR (RATAN COLD REFINED) catalogue
- Short Name:
- J/other/AstBu/65
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We use two independent methods to reduce the data of the surveys made with RATAN-600 radio telescope at 7.6cm in 1988-1999 at the declination of the SS433 source. We also reprocess the data of the "Cold" survey (1980-1981). The resulting RCR (RATAN COLD REFINED) catalogue contains the right ascensions and fluxes of objects identified with those of the NVSS catalogue in the right-ascension interval 7h<=RA<=17h. We obtain the spectra of the radio sources and determine their spectral indices at 3.94 and 0.5GHz. The spectra are based on the data from all known catalogues available from the CATS, Vizier, and NED databases, and the flux estimates inferred from the maps of the VLSS and GB6 surveys. For 245 of the 550 objects of the RCR catalogue the fluxes are known are known only at two frequencies: 3.94GHz (RCR) and 1.4GHz (NVSS). These are mostly sources with fluxes smaller than 30mJy. About 65% of these sources have flat or inverse spectra (alpha>-0.5). We analyse the reliability of the results obtained for the entire list of objects and construct the histograms of the spectral indices and fluxes of the sources. Our main conclusion is that all 10-15mJy objects found in the considered right-ascension interval were already included in the decimetre-wave catalogues.
- ID:
- ivo://CDS.VizieR/J/MNRAS/366/171
- Title:
- Red AGN in XMM/SDSS fields
- Short Name:
- J/MNRAS/366/171
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In this paper we combine archival and proprietary XMM-Newton observations (about 5deg^2^) that overlap with the Sloan Digital Sky Survey to explore the nature of the moderate-z X-ray population. We focus on X-ray sources with optically red colours (g-r>0.4), which we argue are important for understanding the origin of the X-ray background (XRB).
- ID:
- ivo://CDS.VizieR/J/AJ/135/631
- Title:
- Reddenings for the MACHO bulge RR0 Lyrae stars
- Short Name:
- J/AJ/135/631
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present mean reddenings toward 3525 RR0 Lyrae stars from the Galactic bulge fields of the MACHO Survey. These reddenings are determined using the color at minimum V-band light of the RR0 Lyrae stars themselves and are found to be in general agreement with extinction estimates at the same location obtained from other methods.
