IPCLXLBOL - Einstein LX & LBL Values for IPC O Stars

Overview

Soft X-ray (0.2 - 3.5 keV) measurements for all normal, massive, o-type stars surveyed with the Einstein Observatory are presented as a catalog containing 89 detections and 176 upper bounds, together with a detailed discussion of the reduction process. Values of L[x]/L[bol] listed for most stars, range from 10e-5.44 to 10e-7.35; l[x] spans more than 3 orders of magnitude, ranging from 1.5 x 10e31 to 2 x 10e34 ergs se-1. It is noted that at least 30% of o-type stars are variable in X-rays, but that there is little evidence for new objects whose X-ray emission might be significantly enhanced by accretion processes onto a neutron star. For further information, please contact the HEASARC.

Catalog Bibcode

1989ApJ...341..427C

References

The EINSTEIN X-RAY OBSERVATORY Catalog of O-Type Stars, T. Chlebowski and F.R. Harnden, Jr, and S. Sciortino, ApJ 341:427-455, 1989 June 1

Parameters

Name
Number assigned to the LXLBOL catalog entry.

Vmag
BV Photometery except where VMAG Flag is 'p'. Then, data in VMAG is the Photographic magnitude.

RA
The Right Ascension of the object.

Dec
The Declination of the object.

LII
The galactic longitude of the object.

BII
The galactic latitude of the object.

Note
An `*` denotes additional information, available through the HEASARC.

Alt_Name
Contains the HD/HDE number of, if non-existent, the BD/CoD/CPD number in accordance with the HD convention (i.e. CoD numbers of [???] = -52 degrees, and CPD numbers south of that limit).

Alt_Name_2
Other Identifiers

Pos_Ref
Indicates the reference source for the stellar position: 5 or 6 digit numbers are from the SAO catalog; 3 or 4 digit numbers, from Southern LS; and numbers starting with roman numerals, from Northern LS catalogs. Single digit numbers indicate references available through the HEASARC, and `HR` indicates Bright Star Catalogue numbers.

Spect_Type
Gives spectral types. Spectral types assumed from other references are in square brackets. Additional information available from the HEASARC.

Type_Flag
References for the spectral classifications, if other than from Walborn. Additional information available from the HEASARC.

BV_Color
BV photometry, except where the VMAG Flag is `p`, denoting a photographic magnitude.

Bolmag
Contains m[bol], obtained from the formula m[bol] = VMAG + BC - RE[BV_Color]. Additional information available from the HEASARC.

NH
Gives N[H].

NH_Ref
Cites references for directly measure N[H] values. Additional information available from the HEASARC.

Distance
Contains the stellar distances. Additional information available from the HEASARC.

Distance_Flag
References for distance measurement.

Lxlb_Flag
Information regarding the LXLB values. Upper bounds are inticated by the `less than` symbol. Additional information available from the HEASARC.

Lxlb
The Logarithm of the ratio of the 0.2-3.5 keV X-ray to the bolometric luminosity. For detections, log(L[x]/L[bol]) is given.

Lxlb_Error
The probable 1-sigma uncertainty. Additional information available from the HEASARC.

Lx_Flag
Flag for LX. Upper bounds denoted by `less than` symbol.

Lx
The 0.2-3.5 keV X-ray luminosity. Additional information available from the HEASARC.

Lx_Error
Probable uncertainty. Additional information available from the HEASARC.

Class
BROWSE classification type. The classification is based on the `Type` parameter, if one is available.

Contact Person

Questions regarding the IPCLXLBOL database table can be addressed to the HEASARC Help Desk.

Page Author: Browse Software Development Team
Last Modified: Monday, 16-Sep-2024 17:29:25 EDT