2014A&A...565A..38C


C.D.S. - SIMBAD4 rel 1.7 - 2019.07.24CEST03:53:08

2014A&A...565A..38C - Astronomy and Astrophysics, volume 565A, 38-38 (2014/5-1)

LS 5039 - the counterpart of the unidentified MeV source GRO J1823-12.

COLLMAR W. and ZHANG S.

Abstract (from CDS):

The COMPTEL experiment on CGRO observed the γ-ray sky at energies from 0.75 MeV to 30 MeV between April 1991 and June 2000. COMPTEL detected many γ-ray sources, among them an unidentified one labeled GRO J1823-12. It is located near l/b=17.5°/-0.5° and positionally consistent with the prominent γ-ray binary LS 5039. LS 5039 was established as a γ-ray source at TeV energies by HESS and at GeV energies by Fermi/LAT during recent years, whose γ-ray radiation is modulated along its binary orbit. Given this new information we reanalyzed the COMPTEL data of GRO J1823-12 including an orbital-resolved analysis. We applied the standard methods, proper event selections and data binning with subsequent maximum-likelihood deconvolution, to analyze the COMPTEL data. In addition we developed a tool for selecting and binning the COMPTEL data in a phase-resolved manner. We present the orbit-averaged, as well as orbit-resolved MeV analyses, light curves, and spectra, and put them into a multifrequency context. The COMPTEL data show a significant MeV source, which is positionally consistent with LS 5039, but also with other closeby Fermi/LAT sources. The orbit-resolved analysis provides strong evidence, at about the 3σ level, that the MeV flux of GRO J1823-12 is modulated along the binary orbit of about 3.9 days of LS 5039. We show that at MeV energies, the source is brighter at the orbital part around the inferior conjunction than at the part of the superior conjunction, so it is in phase with X-rays and TeV γ-rays, but in anti-phase with GeV γ-rays. The high-energy spectral energy distribution (X-rays to TeV γ-rays) shows the high-energy emission maximum of LS 5039 at MeV energies. We conclude that the COMPTEL source GRO J1823-12 is the counterpart of the microquasar LS 5039, at least for the majority of its MeV emission. The COMPTEL fluxes, put into multifrequency perspective, provide new constraints on the modeling of the high-energy emission pattern of the γ-ray binary LS 5039.

Abstract Copyright:

Journal keyword(s): X-rays: binaries - X-rays: individuals: LS 5039/GRO J1823-12 - gamma rays: stars

Simbad objects: 22

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Number of rows : 22

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 QSO J0530+13 QSO 05 30 56.41672 +13 31 55.1495     20.0 19.35   ~ 867 1
2 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5218 1
3 V* V818 Sco LXB 16 19 55.0688745859 -15 38 25.019920749 11.60 12.40 11.1     Oev 1510 0
4 QSO B1622-297 QSO 16 26 06.02083867 -29 51 26.9710860   18.41 20.5 17.6   ~ 348 0
5 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1658 1
6 V* V821 Ara HXB 17 02 49.3810714542 -48 47 23.163091737 16.20 16.30 15.5     ~ 1686 0
7 V* V2116 Oph Sy* 17 32 02.1544831482 -24 44 44.125962969   20.78 18.4     M6IIIe 641 1
8 NAME Great Annihilator LXB 17 43 54.83 -29 44 42.6           ~ 634 1
9 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 10863 0
10 2XMM J180112.4-254436 LXB 18 01 12.40 -25 44 36.1           ~ 357 1
11 1FGL J1819.4-1518c gam 18 19 25.50 -15 27 36.5           ~ 11 0
12 1FGL J1823.2-1336c gam 18 23 05.97 -13 40 00.7           ~ 18 0
13 PSR J1826-1256 Psr 18 26 08.570 -12 56 33.53           ~ 92 1
14 PSR B1823-13 Psr 18 26 13.06 -13 34 48.1           ~ 341 1
15 V* V479 Sct HXB 18 26 15.0561532140 -14 50 54.249464136 12.02 12.23 11.27 11.04   ON6V((f))z 481 2
16 2FGL J1827.4-1445c gam 18 27 20.2 -14 46 01           ~ 9 0
17 HD 170061 Be* 18 28 00.7384916673 -14 42 24.620334247 9.17 9.85 9.53 9.74   OBe 33 0
18 QSO B1830-211 QSO 18 33 39.92 -21 03 39.9     18.70 21   ~ 534 6
19 SS 433 HXB 19 11 49.5645897701 +04 58 57.824087535   16.3 13.0     A7Ib: 1892 3
20 Granat 1915+105 LXB 19 15 11.54938 +10 56 44.7585           ~ 2215 0
21 NGC 6814 Sy1 19 42 40.5857305428 -10 19 25.102133898   15.33 14.21 11.7 11.3 ~ 690 0
22 Mrk 509 Sy1 20 44 09.7504131334 -10 43 24.724854084   13.35 13.12 10.7   ~ 1088 0

    Equat.    Gal    SGal    Ecl

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2019.07.24-03:53:08

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