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MAXI J1803-298 is a transient black hole candidate discovered in May of 2021 during an outburst that lasted several months. Multiple X-ray observations reveal recurring "dipping" intervals in several of its light curves, particularly during…

MAXI J1803-298, a newly-discovered Galactic transient and black hole candidate, was first detected by \emph{MAXI}/GSC on May 1st, 2021. In this paper, we present a detailed spectral analysis of MAXI J1803-298. Utilizing the X-ray reflection…

High Energy Astrophysical Phenomena · Physics 2022-08-31 Ye Feng , Xueshan Zhao , Yufeng Li , Lijun Gou , Nan Jia , Zhenxuan Liao , Yuan Wang

We present a broadband spectral and timing study of the black hole candidate MAXI J1803-298 during its 2021 outburst using simultaneous observations from NICER, NuSTAR, and Insight-HXMT. The combined multi-instrument coverage allows us to…

High Energy Astrophysical Phenomena · Physics 2026-05-14 Kaushik Chatterjee , Sujoy K. Nath

We perform comprehensive temporal and spectral analysis of the newly discovered X-ray transient MAXI~J1803--298 using an AstroSat target of opportunity observation on May 11, 2021 during its outburst. The source was found to be in the hard…

High Energy Astrophysical Phenomena · Physics 2022-07-20 Swadesh Chand , G. C. Dewangan , Parijat Thakur , Prakash Tripathi , V. K. Agrawal

We report the results from the broad-band X-ray monitoring of the new Galactic black hole candidate MAXI J1803$-$298 with the MAXI/GSC and Swift/BAT during its outburst. After the discovery on 2021 May 1, the soft X-ray flux below 10 keV…

We present the timing analysis results of MAXI J1803$-$298, a black hole candidate, during its 2021 outburst using data obtained from the \textit{Insight-}HXMT and \textit{NICER} telescopes. Our analysis reveals that the source undergoes a…

High Energy Astrophysical Phenomena · Physics 2023-07-05 Haifan Zhu , Xiao Chen , Wei Wang

We present the results obtained from broadband X-ray timing and spectral analysis of black hole candidate MAXI J1803-298 using an AstroSat observation on May 11-12, 2021. Four periodic absorption dips with a periodicity of $7.02 \pm 0.18$…

High Energy Astrophysical Phenomena · Physics 2022-02-16 Arghajit Jana , Sachindra Naik , Gaurava K. Jaisawal , Birendra Chhotaray , Neeraj Kumari , Shivangi Gupta

We present the broadband spectral analysis of all the six hard, intermediate and soft state NuSTAR observations of the recently discovered transient black hole X-ray binary MAXI J1348-630 during its first outburst in 2019. We first model…

High Energy Astrophysical Phenomena · Physics 2021-09-14 Sudip Chakraborty , Ajay Ratheesh , Sudip Bhattacharyya , John A. Tomsick , Francesco Tombesi , Keigo Fukumura , Gaurava K. Jaisawal

We report the first half-year monitoring of the new Galactic black hole candidate MAXI J1348-630, discovered on 2019 January 26 with the Gas Slit Camera (GSC) on-board MAXI. During the monitoring period, the source exhibited two outburst…

The transient X-ray source MAXI J1810-222 was discovered in 2018 and has been active ever since. A long combined radio and X-ray monitoring campaign was performed with ATCA and Swift respectively. It has been proposed that MAXI J1810-222 is…

High Energy Astrophysical Phenomena · Physics 2023-05-03 M. Del Santo , C. Pinto , A. Marino , A. D'Aì , P. -O. Petrucci , J. Malzac , J. Ferreira , F. Pintore , S. E. Motta , T. D. Russell , A. Segreto , A. Sanna

We present results for the first observed outburst from the transient X-ray binary source MAXI J0637-430. This study is based on eight observations from the Nuclear Spectroscopic Telescope Array (NuSTAR) and six observations from the Neil…

We studied the outburst evolution and timing properties of the recently discovered X-ray transient MAXI J1348-630 as observed with NICER. We produced the fundamental diagrams commonly used to trace the spectral evolution, and power density…

We present results from the Nuclear Spectroscopic Telescope Array (NuSTAR) observations of the new black hole X-ray binary candidate MAXI J1631-479 at two epochs during its 2018-2019 outburst, which caught the source in a disk dominant…

High Energy Astrophysical Phenomena · Physics 2020-04-22 Yanjun Xu , Fiona A. Harrison , John A. Tomsick , Dominic J. Walton , Didier Barret , Javier A. Garcia , Jeremy Hare , Michael L. Parker

MAXI J1807+132 is an X-ray transient discovered during the decay of an outburst in 2017. We present optical and X-ray monitoring of the source over more than 125 days, from outburst to quiescence. The outburst decay is characterized by the…

High Energy Astrophysical Phenomena · Physics 2018-12-26 F. Jiménez-Ibarra , T. Muñoz-Darias , M. Armas Padilla , D. M. Russell , J. Casares , M. A. P. Torres , D. Mata Sánchez , P. G. Jonker , F. Lewis

We report on a NuSTAR observation of the recently discovered bright black hole candidate MAXI J1535-571. NuSTAR observed the source on MJD 58003 (five days after the outburst was reported). The spectrum is characteristic of a black hole…

MAXI J1813-095 is an X-ray transient discovered during an outburst in 2018. We report on X-ray and optical observations obtained during this event, which indicate that the source is a new low-mass X-ray binary. The outburst lasted ~70 d and…

We report on a spectral-timing analysis of the black hole X-ray binary candidate MAXI J1543- 564 during its 2011 outburst. All 99 pointed observations of this outburst obtained with the Rossi X-ray Timing Explorer (RXTE) were included in…

High Energy Astrophysical Phenomena · Physics 2015-06-03 H. Stiele , T. Muñoz-Darias , S. Motta , T. M. Belloni

MAXI J1834-021 is a new X-ray transient that was discovered in February 2023. We analysed the spectral and timing properties of MAXI J1834-021 using NICER, NuStar and Swift data collected between March and October 2023. The light curve…

The black hole candidate MAXI J1348-630 was discovered on January 26th, 2019, with the Gas Slit Camera (GSC) on-board \textit{MAXI}. We report a detailed spectral analysis of this source by using the archived data of \textit{NuSTAR}. A…

High Energy Astrophysical Phenomena · Physics 2022-02-16 Nan Jia , Xueshan Zhao , Lijun Gou , Javier A. Garcia , Zhenxuan Liao , Ye Feng , Yufeng Li , Yuan Wang , Huixian Li , Jianfeng Wu

We analyzed two observations of the low-mass black hole X-ray binary MAXI J1348-630 from Nuclear Spectroscopic Telescope Array (NuSTAR) during low hard state and hard intermediate state in the 2019 outburst. The reflection components are…

High Energy Astrophysical Phenomena · Physics 2023-04-27 Hanji Wu , Wei Wang , Na Sai
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