{"type":"journal_article","oa":1,"article_number":"120","doi":"10.3847/1538-4357/ac15f9","status":"public","year":"2021","date_updated":"2024-04-02T07:28:22Z","article_processing_charge":"No","day":"21","date_published":"2021-10-21T00:00:00Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","abstract":[{"lang":"eng","text":"AT2019wey (SRGA J043520.9+552226, SRGE J043523.3+552234) is a transient first reported by the ATLAS optical survey in 2019 December. It rose to prominence upon detection, three months later, by the Spektrum-Roentgen-Gamma (SRG) mission in its first all-sky survey. X-ray observations reported in Yao et al. suggest that AT2019wey is a Galactic low-mass X-ray binary (LMXB) with a black hole (BH) or neutron star (NS) accretor. Here we present ultraviolet, optical, near-infrared, and radio observations of this object. We show that the companion is a short-period (P ≲ 16 hr) low-mass (<1 M⊙) star. We consider AT2019wey to be a candidate BH system since its locations on the Lradio–LX and Lopt–LX diagrams are closer to BH binaries than NS binaries. We demonstrate that from 2020 June to August, despite the more than 10 times brightening at radio and X-ray wavelengths, the optical luminosity of AT2019wey only increased by 1.3–1.4 times. We interpret the UV/optical emission before the brightening as thermal emission from a truncated disk in a hot accretion flow and the UV/optical emission after the brightening as reprocessing of the X-ray emission in the outer accretion disk. AT2019wey demonstrates that combining current wide-field optical surveys and SRG provides a way to discover the emerging population of short-period BH LMXB systems with faint X-ray outbursts."}],"date_created":"2024-03-26T10:32:06Z","issue":"2","external_id":{"arxiv":["2012.00169"]},"extern":"1","publication":"The Astrophysical Journal","oa_version":"Preprint","month":"10","publication_identifier":{"issn":["0004-637X"],"eissn":["1538-4357"]},"quality_controlled":"1","article_type":"original","language":[{"iso":"eng"}],"publication_status":"published","citation":{"short":"Y. Yao, S.R. Kulkarni, K.B. Burdge, I. Caiazzo, K. De, D. Dong, C. Fremling, M.M. Kasliwal, T. Kupfer, J. van Roestel, J. Sollerman, A. Bagdasaryan, E.C. Bellm, S.B. Cenko, A.J. Drake, D.A. Duev, M.J. Graham, S. Kaye, F.J. Masci, N. Miranda, T.A. Prince, R. Riddle, B. Rusholme, M.T. Soumagnac, The Astrophysical Journal 920 (2021).","chicago":"Yao, Yuhan, S. R. Kulkarni, Kevin B. Burdge, Ilaria Caiazzo, Kishalay De, Dillon Dong, C. Fremling, et al. “Multi-Wavelength Observations of AT2019wey: A New Candidate Black Hole Low-Mass X-Ray Binary.” <i>The Astrophysical Journal</i>. American Astronomical Society, 2021. <a href=\"https://doi.org/10.3847/1538-4357/ac15f9\">https://doi.org/10.3847/1538-4357/ac15f9</a>.","ista":"Yao Y, Kulkarni SR, Burdge KB, Caiazzo I, De K, Dong D, Fremling C, Kasliwal MM, Kupfer T, van Roestel J, Sollerman J, Bagdasaryan A, Bellm EC, Cenko SB, Drake AJ, Duev DA, Graham MJ, Kaye S, Masci FJ, Miranda N, Prince TA, Riddle R, Rusholme B, Soumagnac MT. 2021. Multi-wavelength observations of AT2019wey: A new candidate black hole low-mass X-ray binary. The Astrophysical Journal. 920(2), 120.","ama":"Yao Y, Kulkarni SR, Burdge KB, et al. Multi-wavelength observations of AT2019wey: A new candidate black hole low-mass X-ray binary. <i>The Astrophysical Journal</i>. 2021;920(2). doi:<a href=\"https://doi.org/10.3847/1538-4357/ac15f9\">10.3847/1538-4357/ac15f9</a>","apa":"Yao, Y., Kulkarni, S. R., Burdge, K. B., Caiazzo, I., De, K., Dong, D., … Soumagnac, M. T. (2021). Multi-wavelength observations of AT2019wey: A new candidate black hole low-mass X-ray binary. <i>The Astrophysical Journal</i>. American Astronomical Society. <a href=\"https://doi.org/10.3847/1538-4357/ac15f9\">https://doi.org/10.3847/1538-4357/ac15f9</a>","mla":"Yao, Yuhan, et al. “Multi-Wavelength Observations of AT2019wey: A New Candidate Black Hole Low-Mass X-Ray Binary.” <i>The Astrophysical Journal</i>, vol. 920, no. 2, 120, American Astronomical Society, 2021, doi:<a href=\"https://doi.org/10.3847/1538-4357/ac15f9\">10.3847/1538-4357/ac15f9</a>.","ieee":"Y. Yao <i>et al.</i>, “Multi-wavelength observations of AT2019wey: A new candidate black hole low-mass X-ray binary,” <i>The Astrophysical Journal</i>, vol. 920, no. 2. American Astronomical Society, 2021."},"scopus_import":"1","_id":"15215","title":"Multi-wavelength observations of AT2019wey: A new candidate black hole low-mass X-ray binary","intvolume":"       920","main_file_link":[{"url":"https://arxiv.org/abs/2012.00169","open_access":"1"}],"volume":920,"keyword":["Space and Planetary Science","Astronomy and Astrophysics"],"author":[{"first_name":"Yuhan","full_name":"Yao, Yuhan","last_name":"Yao"},{"last_name":"Kulkarni","first_name":"S. R.","full_name":"Kulkarni, S. R."},{"last_name":"Burdge","first_name":"Kevin B.","full_name":"Burdge, Kevin B."},{"first_name":"Ilaria","full_name":"Caiazzo, Ilaria","last_name":"Caiazzo","orcid":"0000-0002-4770-5388","id":"8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d"},{"first_name":"Kishalay","full_name":"De, Kishalay","last_name":"De"},{"last_name":"Dong","first_name":"Dillon","full_name":"Dong, Dillon"},{"last_name":"Fremling","full_name":"Fremling, C.","first_name":"C."},{"full_name":"Kasliwal, Mansi M.","first_name":"Mansi M.","last_name":"Kasliwal"},{"first_name":"Thomas","full_name":"Kupfer, Thomas","last_name":"Kupfer"},{"full_name":"van Roestel, Jan","first_name":"Jan","last_name":"van Roestel"},{"last_name":"Sollerman","full_name":"Sollerman, Jesper","first_name":"Jesper"},{"full_name":"Bagdasaryan, Ashot","first_name":"Ashot","last_name":"Bagdasaryan"},{"first_name":"Eric C.","full_name":"Bellm, Eric C.","last_name":"Bellm"},{"last_name":"Cenko","first_name":"S. Bradley","full_name":"Cenko, S. Bradley"},{"last_name":"Drake","first_name":"Andrew J.","full_name":"Drake, Andrew J."},{"full_name":"Duev, Dmitry A.","first_name":"Dmitry A.","last_name":"Duev"},{"last_name":"Graham","full_name":"Graham, Matthew J.","first_name":"Matthew J."},{"full_name":"Kaye, Stephen","first_name":"Stephen","last_name":"Kaye"},{"last_name":"Masci","first_name":"Frank J.","full_name":"Masci, Frank J."},{"last_name":"Miranda","first_name":"Nicolas","full_name":"Miranda, Nicolas"},{"first_name":"Thomas A.","full_name":"Prince, Thomas A.","last_name":"Prince"},{"first_name":"Reed","full_name":"Riddle, Reed","last_name":"Riddle"},{"last_name":"Rusholme","full_name":"Rusholme, Ben","first_name":"Ben"},{"first_name":"Maayane T.","full_name":"Soumagnac, Maayane T.","last_name":"Soumagnac"}],"publisher":"American Astronomical Society"}