Abstract
| Original language | English |
|---|---|
| Article number | A142 |
| Journal | Astronomy and Astrophysics |
| Volume | 624 |
| Number of pages | 6 |
| ISSN | 0004-6361 |
| DOIs | |
| Publication status | Published - 2019 |
Keywords
- x-rays: binaries
- X-rays: individuals: IGR J17503-2636
Cite this
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IGR J17503-2636: a candidate supergiant fast X-ray transient. / Ferrigno, C.; Bozzo, E.; Sanna, A.; Jaisawal, G. K.; M. Girard, J.; Di Salvo, T.; Burderi, L.
In: Astronomy and Astrophysics, Vol. 624, A142, 2019.Research output: Contribution to journal › Journal article › Research › peer-review
TY - JOUR
T1 - IGR J17503-2636: a candidate supergiant fast X-ray transient
AU - Ferrigno, C.
AU - Bozzo, E.
AU - Sanna, A.
AU - Jaisawal, G. K.
AU - M. Girard, J.
AU - Di Salvo, T.
AU - Burderi, L.
PY - 2019
Y1 - 2019
N2 - The object IGR J17503–2636 is a hard X-ray transient discovered by INTEGRAL on 2018 August 11. This was the first ever reported X-ray emission from this source. Following the discovery, follow-up observations were carried out with Swift, Chandra, NICER, and NuSTAR. Here we report on the analysis of all of these X-ray data and the results obtained. Based on the fast variability in the X-ray domain, the spectral energy distribution in the 0.5–80 keV energy range, and the reported association with a highly reddened OB supergiant at ∼10 kpc, we conclude that IGR J17503–2636 is most likely a relatively faint new member of the supergiant fast X-ray transients. Spectral analysis of the NuSTAR data revealed a broad feature in addition to the typical power-law with exponential roll-over at high energy. This can be modeled either in emission or as a cyclotron scattering feature in absorption. If confirmed by future observations, this feature would indicate that IGR J17503–2636 hosts a strongly magnetized neutron star with B ∼ 2 × 1012 G.
AB - The object IGR J17503–2636 is a hard X-ray transient discovered by INTEGRAL on 2018 August 11. This was the first ever reported X-ray emission from this source. Following the discovery, follow-up observations were carried out with Swift, Chandra, NICER, and NuSTAR. Here we report on the analysis of all of these X-ray data and the results obtained. Based on the fast variability in the X-ray domain, the spectral energy distribution in the 0.5–80 keV energy range, and the reported association with a highly reddened OB supergiant at ∼10 kpc, we conclude that IGR J17503–2636 is most likely a relatively faint new member of the supergiant fast X-ray transients. Spectral analysis of the NuSTAR data revealed a broad feature in addition to the typical power-law with exponential roll-over at high energy. This can be modeled either in emission or as a cyclotron scattering feature in absorption. If confirmed by future observations, this feature would indicate that IGR J17503–2636 hosts a strongly magnetized neutron star with B ∼ 2 × 1012 G.
KW - x-rays: binaries
KW - X-rays: individuals: IGR J17503-2636
U2 - 10.1051/0004-6361/201935185
DO - 10.1051/0004-6361/201935185
M3 - Journal article
VL - 624
JO - Astronomy & Astrophysics
JF - Astronomy & Astrophysics
SN - 0004-6361
M1 - A142
ER -