First results from TOO observations of the Aql X-1 field with INTEGRAL

Abstract

We present results of observations of the Aql X-1 field performed in March-April 2003 with the INTEGRAL observatory. This TOO (Target Of Opportunity) INTEGRAL observations was initiated upon receiving an indication from the ASM/RXTE that the source started an outburst. Thirteen X-ray sources were detected by the INTEGRAL imagers, JEM-X and IBIS, during these observations. We present a preliminary spectral and timing analysis for several bright sources in the field, Aql X-1, X1901+03, 4U1907+097, XTE J1908+094 and X1908+075. We also detected two X-ray bursts from Aql X-1 near the end of the general outburst episode.

5 pages, 7 figures, accepted for publication in the A&A

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• The Milky Way in X-rays for an outside observer: Log(N)-Log(S) and Luminosity Function of X-ray binaries from RXTE/ASM data
• Broad-band X-ray measurements of the black hole candidate XTE J1908+094
• First results from TOO observations of the Aql X-1 field with INTEGRAL
• First results of observations of transient pulsar SAXJ2103.5+4545 with the INTEGRAL observatory
• The X-ray Source SLX 1732-304 in the Globular Cluster Terzan 1: The Spectral States and an X-ray Burst

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• Hard Spectra of X-Ray Pulsars from INTEGRAL Data
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• Discovery of pulsations in the X-ray transient 4U 1901+03
• Accretion regimes in the X-ray pulsar 4U 1901+03
• Hard X-ray Bursts Detected by the IBIS Telescope Onboard the INTEGRAL Observatory in 2003-2004
• Integral/Ibis Census of the Sky Beyond 100 kev
• INTEGRAL observations of SS433, a supercritically accreting microquasar with hard spectrum
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• Evolution of timing and spectral characteristics of 4U 1901+03 during its 2019 outburst using the Swift and NuSTAR observatories
• Flares, Broadening of the Pulse frequency peak, and Quasi Periodic Oscillations in the Transient X-ray Pulsar 4U 1901+03
• Spectral and temporal properties of the supergiant fast X-ray transient IGR J18483-0311 observed by INTEGRAL