- Swift observations confirm renewed activity of the transient neutron star X-ray binary Aql X-1
- The astronomer's telegram
- Document type
- Faculty of Science (FNWI)
- Anton Pannekoek Institute for Astronomy (API)
Following reports of the brightening of the optical counterpart of the transient neutron star X-ray binary Aql X-1 between June 3 and 5 (ATel #5114), we observed the source with Swift on June 8. The XRT was on target for ~0.8 ks in the photon counting mode and for ~0.1 ks in the windowed timing mode. Aql X-1 is clearly detected in these observations. The X-ray spectrum can be described by an absorbed power-law model with a hydrogen column density of N_H = (6.1 +/- 1.2)E21 cm-2 and a photon index of 2.0 +/-0.2.
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