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arXiv · 2107.05586

Wide-field X-ray observations of the supernova remnant Puppis A with the SRG/ART-XC telescope

R. Krivonos·V. Arefiev·I. Lapshov·E. Filippova·R. Burenin·A. Semena·S. Grebenev·S. Sazonov·A. Shtykovsky·A. Tkachenko·A. Lutovinov
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Abstract

The Spectrum-Roentgen-Gamma (SRG) observatory is currently conducting its 4-year all-sky X-ray survey, started on December 12, 2019. The survey is periodically interrupted for technological operations with the spacecraft. These time intervals are usually used by the Mikhail Pavlinsky ART-XC telescope to perform calibrations. In this context, SRG carried out scanning observations of the Puppis A supernova remnant (SNR) with the aim to check the imaging performance of ART-XC and to optimize the technique of image reconstruction for extended objects. Using the unique imaging capabilities of ART-XC and its uniform coverage of the entire Puppis A region, we attempted to investigate the morphology of this SNR at energies >4 keV, and to search for previously unknown X-ray sources. Puppis A was observed in 2019-2020, conducting 1.5 x 1.5 degrees shallow surveys with an exposure of 36 hours. Additional deep pointed observations of the central part of Puppis A were carried out in 2021 lasted 31 hours to highlight the morphology of the extended emission. The X-ray emission of the Puppis A was significantly detected as an extended structure in the 4-6 keV energy band. The morphology of the emission is in general agreement with that observed in soft X-rays previously. The deep sky image of Puppis A obtained with the ART-XC telescope is characterized by a typical SNR shell rim morphology, an extended emission and a bright emission knot in the north-eastern part of the supernova shell. Also, four point X-ray sources have been detected, including three objects identified in catalogs, and one newly discovered X-ray emitter.

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R. Krivonos, V. Arefiev, I. Lapshov, E. Filippova, R. Burenin, A. Semena, S. Grebenev, S. Sazonov, A. Shtykovsky, A. Tkachenko, A. Lutovinov. 2022-01-13. Wide-field X-ray observations of the supernova remnant Puppis A with the SRG/ART-XC telescope. https://doi.org/10.1093/mnras%2Fstab3647

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