Revised and updated catalogue of the First Byurakan Survey of Late-Type Stars: second edition

Abstract

A total of 18 lists of the First Byurakan Survey of Late-Type Stars (FBS LTS) were published between 1990 and 2016. The stars were found on FBS low-dispersion spectroscopic plates. A systematic search and selection were carried out on a surface of ∼16 000 deg2 on almost the whole area of the FBS. As a result, the ‘Revised and Updated Catalogue of the First Byurakan Survey of Late-Type Stars’ was generated (FBS LTS v1; 1045 objects). We present the second version of the catalogue of FBS LTS with new data (FBS LTS v2), comprising 1471 objects. It is a homogeneous and complete data base for high-Galactic-latitude, late-type stars, including M and C types. Since 2007, all FBS low-resolution spectral plates have been digitized. All digitized FBS (DFBS) spectral plates have been analysed with FITSView and SAO Image ds9, and numerous relatively faint LTSs have been discovered. We have performed cross-correlations with DFBS, USNO-B1.0, 2MASS, AllWISE, IRAS PSC/FSC, AKARI, ROSAT BSC/FSC, GCVS, SDSS and added updated SIMBAD data. For numerous new detected objects, we present accurate DSS2 positions, approximate spectral subtypes refined from the DFBS low-dispersion spectra, luminosity classes estimated from 2MASS colours, and available proper motions for 1471 FBS LTSs. The Revised and Updated Catalogue v2 lists a large number of completely new objects, which promises to extend very significantly the census of M giants, faint N-type asymptotic giant branch carbon stars, CH-type carbon giants at high Galactic latitudes, and M dwarfs in the Solar vicinity up to 16.0–17.0 mag in the visual. Some important data from Gaia DR2 and supplementary spectra from the Byurakan Astrophysical Observatory 2.6-m and LAMOST telescopes are presented.

M giants found in the First Byurakan Spectral Sky data base. V. Gaia DR2 data

“…For FBS LTSs, medium-resolution CCD spectra were obtained at different epochs with the BAO (Armenia) 2.6-m telescope ( UAGS, ByuFOSC2 and SCORPIO spectrographs), moderate -and highresolution CCD spectroscopy obtained with the Observatory de Haute-Provence (OHP, France) 1.93m telescope (CARELEC spectrograph). For some FBS LTSs medium-resolution CCD spectra also were obtained with the Cima-Ekar 1.83-m telescope of the Padova Astronomical Observatory (Italy) equipped with the Asiago Faint Objects Spectrometer and Camera (AFOSC), and with the 1.52m Cassini telescope of the Bologna Astronomical Observatory at Loiano (Italy) equipped with the Bologna Faint Objects Spectrometer and Camera (BFOSC; Gigoyan et al, 2019).…”

“…All DFBS plates were analyzed with the help of standard image analysis softwares. The sec-ond version of the "Revised And Updated Catalogue of the First Byurakan Survey of Late-Type Stars", containing data for 1471 LTSs (130 C-type stars, 235 M dwarfs, and 1096 M-type giants, was generated (Gigoyan et al (2019), SIMBAD Vizier catalogue J/MNRAS/489/2030/catv2).…”

Investigation of faint galactic carbon stars from the First Byurakan Spectral Sky Survey. IV. GAIA DR2 data

“…We estimate the absolute magnitudes (in V -band) for 18 objects adopting that M V = +4.81 mag for Sun. Figure 1 show positions on colour -absolute MG magnitude (Gaia DR2 G -band absolute magnitude) and T ef f versus absolute magnitude (Hertzsprung -Russell) diagram for 127 FBS C stars, also for near 150 M dwarfs from the "FBS Late -Type Stars Catalogue" (Gigoyan et al, 2019). All N -type AGB stars are distributed in the brightest region, where Long -Period Variables (Miras, Semi -Regular variables, slow irregular variables, and small -amplitude red giant) are located and Figure 2…”

“…The advantages using these Softwares for selecting faint LTS on DFBS plates are described more detail in . "The Second Revised And Updated Version of the FBS LTS Catalogue", containing comprehensive data for 1471 new objects, is available at CDS, SIMBAD VizieR data base (Gigoyan et al, 2019). The goal of this paper is further exploitation of the Gaia Data Release 2 (DR2) (Gaia Collaboration et al, 2018) high accurate photometric and astrometric data, also the distance estimations, presented in catalogue of Bailer-Jones et al (2018b), to estimate important parameters, such as absolute magnitudes and distribution in our Galaxy for carbon stars, selected on the lr FBS survey plates, and presented in the "Second and Updated Version of the FBS Late-Type Stars Catalogue (Gigoyan et al, 2019).…”

Big Data in Astronomy: Surveys, Catalogs, Databases and Archives

“…It resulted in discovery of 1515 UV-excess (UVX) galaxies, including more than 200 AGN and more than 100 SB galaxies. Markarian survey led to the classification of Seyferts into Sy1 and Sy2 (Weedman & Khachikyan, 1968), the definition of Starburst galaxies (Weedman, 1977), and several other projects, such as FBS Blue Stellar Objects (BSOs, Mickaelian (2008)), late-type stars (Gigoyan et al, 2019), optical identifications of IRAS sources (Byurakan-IRAS Galaxies (Mickaelian & Sargsyan, 2004) and Byurakan-IRAS Stars (Mickaelian & Gigoyan, 2006), BIG and BIS objects, respectively). The Second Byurakan Survey (SBS) was also carried out with BAO 1m Schmidt and was the continuation of FBS to fainter magnitudes (Stepanian, 2005).…”