SIMBAD references

2005ApJ...630L.157M - Astrophys. J., 630, L157-L160 (2005/September-2)

The INTEGRAL/IBIS source AX J1838.0-0655: a soft X-Ray-to-TeV γ-ray broadband emitter.

MALIZIA A., BASSANI L., STEPHEN J.B., BAZZANO A., UBERTINI P., BIRD A.J., DEAN A.J., SGUERA V., RENAUD M., WALTER R. and GIANOTTI F.

Abstract (from CDS):

We report on INTEGRAL observations of AX J1838.0-0655, one of the unidentified objects listed in the first IBIS/ISGRI survey catalog and located in the Scutum arm region. This object, detected in the 20-300 keV band at a confidence level of 15.3 σ (9x10–11 ergs/cm2/s), is the likely counterpart of the still unidentified TeV source HESS J1837-069. It has been detected in the past by various X-ray telescopes, including ASCA, implying that it is a persistent rather than a transient source; the ASCA image is compatible with the source not being resolved. The broad 1-300 keV spectrum is characterized by an absorbed [NH= (6.7±1.3) x1022/cm2] and hard (Γ=1.5±0.2) power-law continuum. Possible counterparts (radio and infrared) present within the X-ray error box are discussed, even if no clear association can be identified. The broadband spectrum together with the TeV detection suggest that AX J1838.0-0655 may be a supernova remnant or a pulsar wind nebula, which has so far eluded detection in the radio band. This is the second unidentified HESS source that shows a substantial soft gamma-ray emission.

Abstract Copyright:

Journal keyword(s): Gamma Rays: Observations - X-rays: individual (AX J1838.0-0655) - X-rays: individual (HESS J1837-069)

Simbad objects: 17

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2021.02.25-09:57:40

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