SIMBAD references

2011ApJ...735...33M - Astrophys. J., 735, 33 (2011/July-1)

Chandra observation of the TeV source HESS J1834-087.


Abstract (from CDS):

Chandra ACIS observed the field of the extended TeV source HESS J1834-087 for 47 ks. A previous XMM-Newton EPIC observation of the same field revealed a point-like source (XMMU J183435.3-084443) and an offset region of faint extended emission. In the low-resolution, binned EPIC images the two appear to be connected. However, the high-resolution Chandra ACIS images do not support the alleged connection. In these images, XMMU J183435.3-084443 is resolved into a point source, CXOU J183434.9-084443 (L_0.5-8 keV_≃ 2.3 x1033 erg/s, for a distance of 4 kpc; photon index Γ ≃ 1.1), and a compact ( ≲ 20'') nebula with an isotropic morphology and a softer spectrum (L_0.5-8 keV_≃ 4.1x1033 erg/s, Γ ≃ 2.7). The nature of the nebula is uncertain. We discuss a dust scattering halo and a pulsar-wind nebula as possible interpretations. Based on our analysis of the X-ray data, we re-evaluate the previously suggested interpretations of HESS J1834-087 and discuss a possible connection to the Fermi Large Area Telescope source 1FGL J1834.3-0842c. We also obtained an upper limit of 3x10–14 erg/cm2/s on the unabsorbed flux of the SGR J1833-0832 (in quiescence), which happened to be in the ACIS field of view.

Abstract Copyright:

Journal keyword(s): stars: neutron - X-rays: individual (CXOU J183434.9-084443, XMMU J183435.3-084443, HESS J1834-087, 1FGL J1834.3-0842c, W41=SNR G23.3-0.3)

Simbad objects: 13

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