XRISM/Xtend Transient Search (XTS) detected an X-ray flare from an eclipsing binary

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dc.contributor.authorIshihara, Y.
dc.contributor.authorFukushima, K.
dc.contributor.authorKanemaru, Y.
dc.contributor.authorPottschmidt, Katja
dc.contributor.authoret al
dc.date.accessioned2025-10-03T19:33:43Z
dc.date.issued2025-04-14
dc.descriptionAuthors: Y. Ishihara (Chuo U.), K. Fukushima, Y. Kanemaru, S. Ogawa (JAXA), M. Audard (U. de Geneve), E. Behar (Technion), S. Inoue (Kyoto U.), T. Kohmura (TUS), Y. Maeda (JAXA), M. Mizumoto (UTEF), N. Nagashima (Chuo U.), M. Nobukawa (NUE), K. Pottschmidt (UMBC, NASA GSFC, CRESST), M. Shidatsu (Ehime U.), H. Sugai (Chuo U.), Y. Terada (Saitama U.), Y. Terashima (Ehime U.), Y. Tsuboi (Chuo U.), H. Uchida (Kyoto U.), T. Yoneyama (Chuo U.), M. Yoshimoto (Ehime U.)
dc.description.abstractXRISM/Xtend Transient Search (XTS) detected an X-ray flare from an X-ray source XRISM J1746-2940 on 2025-04-12 TT. The source position is determined to be (R.A., Dec.) = (266.528, -29.671), with a systematic error of ~ 40 arcsec. A plausible counterpart is an eclipsing binary V734 Sgr located ~ 10 arcsec apart from the position of XRISM J1746-2940. The flare started at 2025-04-12 at ~ 12:38 TT. The flare reached its peak on 2025-04-12 at ~ 13:12. The flare exponentially decayed in 10⁴ sec. The peak flux is estimated to be 2 × 10⁻¹¹ erg s⁻¹ cm⁻² (0.4 – 10.0 keV). A systematic error of roughly 20% should be added to the statistical error. Corresponding luminosity is 2 × D₉₇₈ₚ꜀ × 10³³ erg s⁻¹ by assuming the distance to XRISM J1746-2940 of D₉₇₈ₚ꜀. We derived the above systematic error for the flux by comparing our derived values for the sources detected with XTS in several observations with those for the corresponding X-ray counterparts. We estimated the systematic error for the source position from the separations between the detected sources with the corresponding counterparts in the same field of view.
dc.description.urihttps://www.astronomerstelegram.org/?read=17144
dc.format.extent2 pages
dc.genrearticles
dc.identifierdoi:10.13016/m28aft-j3rm
dc.identifier.citationIshihara, Y., K. Fukushima, Y. Kanemaru, K. Pottschmidt, et al. “XRISM/Xtend Transient Search (XTS) Detected an X-Ray Flare from an Eclipsing Binary.” The Astronomer’s Telegram, April 14, 2025. https://www.astronomerstelegram.org/?read=17144.
dc.identifier.urihttp://hdl.handle.net/11603/40313
dc.language.isoen
dc.publisherThe Astronomer's Telegram
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
dc.relation.ispartofUMBC Faculty Collection
dc.relation.ispartofUMBC Physics Department
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.titleXRISM/Xtend Transient Search (XTS) detected an X-ray flare from an eclipsing binary
dc.typeText
dcterms.creatorhttps://orcid.org/0000-0002-4656-6881

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