On the nature of the hard X-ray source IGR J2018+4043
| Autor: | A. M. Bykov, A. M. Krassilchtchikov, Yu. A. Uvarov, J. A. Kennea, G. G. Pavlov, G. M. Dubner, E. B. Giacani, H. Bloemen, W. Hermsen, J. Kaastra, F. Lebrun, M. Renaud, R. Terrier, M. DeBecker, G. Rauw, J.-P. Swings |
|---|---|
| Přispěvatelé: | Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Photon
010504 meteorology & atmospheric sciences Field (physics) Infrared Ciencias Físicas Flux FOS: Physical sciences Astrophysics 01 natural sciences Source field Spectral line purl.org/becyt/ford/1 [https] [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] 0103 physical sciences ISM: individual (γ Cygni) X-Rays: ISM 010303 astronomy & astrophysics 0105 earth and related environmental sciences Physics [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] Astrophysics (astro-ph) X-ray Astronomy and Astrophysics purl.org/becyt/ford/1.3 [https] Astronomía x-ray Space and Planetary Science ISM: Supernova Remnants CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | The Astrophysical Journal The Astrophysical Journal, American Astronomical Society, 2006, 649, pp.L21-L24. ⟨10.1086/508327⟩ The Astrophysical Journal, 2006, 649, pp.L21-L24. ⟨10.1086/508327⟩ CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| ISSN: | 0004-637X 1538-4357 |
| DOI: | 10.1086/508327 |
| Popis: | We found a very likely counterpart to the recently discovered hard X-ray source IGR J2018+4043 in the multi-wavelength observations of the source field. The source, originally discovered in the 20-40 keV band, is now confidently detected also in the 40-80 keV band, with a flux of (1.4 +/- 0.4) x 10(-11) erg cm(-2) s(-1). A 5 ks Swift observation of the IGR J2018+4043 field revealed a hard point-like source with the observed 0.5-10 keV flux of 3.4(+0.7)(-0.8) x 10(-12) erg cm(-2) s(-1) (90% confidence level) at alpha = 20h18m38.55s, delta = +40d41m00.4s (with a 4.2" uncertainty). The combined Swift-INTEGRAL spectrum can be described by an absorbed power-law model with photon index gamma = 1.3 +/- 0.2 and N_H = 6.1(+3.2)(-2.2) x 10(22) cm(-2). In archival optical and infrared data we found a slightly extended and highly absorbed object at the Swift source position. There is also an extended VLA 1.4 GHz source peaked at a beam-width distance from the optical and X-ray positions. The observed morphology and multiwavelength spectra of IGR J2018+4043 are consistent with those expected for an obscured accreting object, i.e. an AGN or a Galactic X-ray binary. The identification suggests possible connection of IGR J2018+4043 to the bright gamma-ray source GEV J2020+4023 (3EG J2020+4017) detected by COS B and CGRO EGRET in the gamma-Cygni SNR field. 5 pages, 3 figures, uses emulateapj style |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|