SIMBAD references

2013AJ....145...31K - Astron. J., 145, 31 (2013/February-0)

Catalog and statistical study of X-ray selected BL Lacertae objects.


Abstract (from CDS):

This paper presents a catalog of 312 X-ray selected BL Lacerate objects (XBLs), optically identified through the end of 2011. It contains the names from different surveys, equatorial coordinates, redshifts, multifrequency flux values, and luminosities for each source. In addition, the different characteristics of XBLs are statistically investigated (redshift, radio/optical/X-ray luminosities, central black hole (BH) mass, synchrotron peak frequency, broadband spectral indices, optical flux variability). Their values are collected through an extensive bibliographic and database search or calculated by us. The redshifts range from 0.031 to 0.702 with a maximum of the distribution at z = 0.223. The 1.4 GHz luminosities of XBLs log νLν∼ 39-42 erg.s–1 while optical V and X-ray 0.1-2.4 keV bands show log νLν∼ 43-46 erg.s–1. The XBL hosts are elliptical galaxies with effective radii reff= 3.2625.40 kpc and ellipticities, ∈ = 0.040.52. Their R-band absolute magnitudes MR range from -21.11 mag to -24.86 mag with a mean value of -22.83 mag. The V - R indices of the hosts span from 0.61 to 1.52 and reveal a fourth-degree polynomial relationship with z that enables us to evaluate the redshifts of five sources whose V - R indices were determined from the observations but whose irredshifts values are either not found or not confirmed. The XBL nuclei show a wider range of 7.31 mag for MR with the highest luminosity corresponding to MR= -27.24 mag. The masses of central BHs are found in the interval log MBH= 7.39-9.30 solar masses (with distribution maximum at log MBH/M= 8.30). The synchrotron peak frequencies are spread over the range log νpeak= 14.56-19.18 Hz with a peak of the distribution at log νpeak= 16.60 Hz. The broadband radio-to-optical (αro), optical-to-X-ray (αox), and radio-to-X-ray (α_ rx_) spectral indices are distributed in the intervals (0.17,0.59), (0.56,1.48), and (0.41,0.75), respectively. In the optical energy range, the overall flux variability increases, on average, towards shorter wavelengths: < Δm > = 1.22, 1.50, and 1.82 mag through the R, V, B bands of Johnson-Cousins system, respectively. XBLs seem be optically less variable at the intranight timescales compared to the radio-selected BL Lacs (RBLs).

Abstract Copyright:

Journal keyword(s): BL Lacertae objects: general - galaxies: active

VizieR on-line data: <Available at CDS (J/AJ/145/31): table2.dat table6.dat table7.dat table9.dat table12.dat refs.dat>

Errata: erratum vol. 145, art. 86 (2013)

CDS comments: H 0548-325 is a misprint for 1H 0548-322. MS 022.9+7459 is a misprint for MS 0922.9+7459. SHBL J032350.7-071737 is a misprint for SHBL J032350.7+071737. H 1517+650 is H 1517+656 in Simbad. MS 0737.9+744 is 1E 0737.9+7441 in Simbad. RX J2304.6+3705 is 1RXS J230437.1+370506 in Simbad. EXO 1146+2456 and EXO 1149.9+2455 are EXO 1146.9+2455 in Simbad. Reference: Kapanadze 2009 (K09) is 2009, MNRAS, 398, 832 (= 2009MNRAS.398..832K) not 2009, MNRAS, 798, 832.

Simbad objects: 432

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