196 citations · 1.3k across the 49 of their papers we have counts for
49 papers
The 2020 Superburst of 4U 1608-522 and its impact on the accretion disk
Tugba Boztepe, Tolga Guver, Elif Ece Devecioglu +9
Superbursts are rare events observed from bursting neutron star low mass X-ray binaries. They are thought to originate from unstable burning of the thick layer of Carbon on the sur…
Thermonuclear superburst of MAXI J1752457 observed with NinjaSat and MAXI
Amira Aoyama, Teruaki Enoto, Takuya Takahashi +17
An uncatalogued bright X-ray transient was detected with MAXI on November 9, 2024, named MAXI J1752457. The NinjaSat X-ray observatory promptly observed the source from November…
Extremely luminous optical afterglow of an energetic gamma-ray burst GRB 230204B
Rahul Gupta, Judith Racusin, Vladimir Lipunov +47
Robotic telescope networks play an important role in capturing early and bright optical afterglows, providing critical insights into the energetics and emission mechanisms of GRBs.…
Searching for the Signature of Fast Radio Burst by Swift/XRT X-ray Afterglow Light Curve
Hsien-chieh Shen, Takanori Sakamoto, Motoko Serino +1
A new type of cosmological transient, dubbed fast radio bursts (FRBs), was recently discovered. The source of FRBs is still unknown. One possible scenario of an FRB is the collapse…
Possible X-ray Cocoon Emission from GRB 050709
Naoki Ogino, Makoto Arimoto, Hamid Hamidani +6
The detection of the short gamma-ray burst (SGRB) 050709 by the HETE-2 satellite opened a new window into understanding the nature of SGRBs, offering clues about their emission mec…
A catalogue of unusually long thermonuclear bursts on neutron stars
Khaled Alizai, Jérôme Chenevez, Andrew Cumming +10
Rare, energetic (long) thermonuclear (Type I) X-ray bursts are classified either as intermediate-duration or superbursts, based on their duration. Intermediate-duration bursts last…
GRB 221009A: Discovery of an Exceptionally Rare Nearby and Energetic Gamma-Ray Burst
Maia A. Williams, Jamie A. Kennea, S. Dichiara +53
We report the discovery of the unusually bright long-duration gamma-ray burst (GRB), GRB 221009A, as observed by the Neil Gehrels Swift Observatory (Swift), Monitor of All-sky X-ra…
Discovery of a new supergiant fast X-ray transient MAXI J0709-159 associated with the Be star LY CMa
Mutsumi Sugizaki, Tatehiro Mihara, Kohei Kobayashi +10
We report on the discovery of a new supergiant fast X-ray transient (SFXT), MAXI J0709159, and its identification with LY CMa (also known as HD 54786). On 2022 January 25, a new…
Discovery of a strong 6.6 keV emission feature from EXO 1745248 after the superburst in 2011 October
Wataru B. Iwakiri, Motoko Serino, Tatehiro Mihara +4
We discover an unidentified strong emission feature in the X-ray spectrum of EXO 1745248 obtained by RXTE at 40 hr after the peak of a superburst. The structure was centered at…
Gravitational Wave Physics and Astronomy in the nascent era
Makoto Arimoto, Hideki Asada, Michael L. Cherry +50
The detections of gravitational waves (GW) by LIGO/Virgo collaborations provide various possibilities to physics and astronomy. We are quite sure that GW observations will develop…
The RS CVn type star GT Mus shows most energetic X-ray flares throughout the 2010s
Ryo Sasaki, Yohko Tsuboi, Wataru Iwakiri +14
We report that the RS CVn-type star GT Mus (HR 4492, HD 101379 + HD 101380) was the most active star in the X-ray sky in the last decade in terms of the scale of recurrent energeti…
Less noticeable shallow decay phase in early X-ray afterglows of GeV/TeV-detected gamma-ray bursts
Ryo Yamazaki, Yuri Sato, Takanori Sakamoto +1
The nature of the shallow decay phase in the X-ray afterglow of the gamma-ray burst (GRB) is not yet clarified. We analyze the data of early X-ray afterglows of 26 GRBs triggered b…
The 7-year MAXI/GSC X-ray Source Catalog in the High Galactic-Latitude Sky (3MAXI)
Taiki Kawamuro, Yoshihiro Ueda, Megumi Shidatsu +28
We present the third MAXI/GSC catalog in the high Galactic-latitude sky () based on the 7-year data from 2009 August 13 to 2016 July 31, complementary to that in th…
MAXI upper limits of the electromagnetic counterpart of GW170817
Satoshi Sugita, Nobuyuki Kawai, Satoshi Nakahira +5
We report the MAXI observation of the gravitational-wave (GW) event GW170817 and the electromagnetic counterpart of GW170817. GW170817 is a binary neutron star coalescence candidat…
Detection of the thermal component in GRB 160107A
Yuta Kawakubo, Takanori Sakamoto, Satoshi Nakahira +14
We present the detection of a blackbody component in GRB 160107A emission by using the combined spectral data of the CALET Gamma-ray Burst Monitor (CGBM) and the MAXI Gas Slit Came…
Development of a 32-channel ASIC for an X-ray APD Detector onboard the ISS
M. Arimoto, S. Harita, S. Sugita +15
We report on the design and performance of a mixed-signal application specific integrated circuit (ASIC) dedicated to avalanche photodiodes (APDs) in order to detect hard X-ray emi…
Discovery of the new X-ray transient MAXI J1807+132: a Candidate of a Neutron Star Low-mass X-ray binary
Megumi Shidatsu, Yutaro Tachibana, Taketoshi Yoshii +9
We report on the detection and follow-up multi-wavelength observations of the new X-ray transient MAXI J1807+132 with the MAXI/GSC, Swift, and ground-based optical telescopes. The…
X-ray upper limits of GW150914 with MAXI
Nobuyuki Kawai, Hitoshi Negoro, Motoko Serino +4
We searched for X-ray candidates of the gravitational wave (GW) event GW150914 with Monitor of All-sky X-ray Image (MAXI). MAXI observed the error region of the GW event GW150914 f…
X-ray upper limits of GW151226 with MAXI
Motoko Serino, Nobuyuki Kawai, Hitoshi Negoro +3
The error region of the the gravitational-wave (GW) event GW151226 was observed with Monitor of All-sky X-ray Image (MAXI). MAXI was operated at the time of GW151226, and continuou…
X-ray Reflection and An Exceptionally Long Thermonuclear Helium Burst from IGR J17062-6143
L. Keek, W. Iwakiri, M. Serino +3
Thermonuclear X-ray bursts from accreting neutron stars power brief but strong irradiation of their surroundings, providing a unique way to study accretion physics. We analyze MAXI…
Large X-ray Flares on Stars Detected with MAXI/GSC: A Universal Correlation between the Duration of a Flare and its X-ray Luminosity
Yohko Tsuboi, Kyohei Yamazaki, Yasuharu Sugawara +39
23 giant flares from 13 active stars (eight RS CVn systems, one Algol system, three dMe stars and one YSO) were detected during the first two years of our all-sky X-ray monitoring…
Maxi observations of long X-ray bursts
Motoko Serino, Wataru Iwakiri, Toru Tamagawa +5
We report nine long X-ray bursts from neutron stars, detected with Monitor of All-sky X-ray Image (MAXI). Some of these bursts lasted for hours, and hence are qualified as superbur…
Swift/BAT and MAXI/GSC Broadband Transient Monitor
Takanori Sakamoto, Ryoma Oda, Tatehiro Mihara +7
We present the newly developed broadband transient monitor using the Swift Burst Alert Telescope (BAT) and the MAXI Gas Slit Camera (GSC) data. Our broadband transient monitor moni…
Wide-Field MAXI: soft X-ray transient monitor
Makoto Arimoto, Nobuyuki Kawai, Yoichi Yatsu +14
Wide-Field MAXI (WF-MAXI: Wide-Field Monitor of All-sky X-ray Image) is a proposed mission to detect and localize X-ray transients including electro-magnetic counterparts of gravit…