Search Publications
A Search for the O'Connell Effect in Contact Binaries in the Era of Big Sky Surveys. I.
Christopoulou, Panagiota-Eleftheria; Papageorgiou, Athanasios; Kleftogiannis, Georgios D.
Asymmetries between the two maxima of the light curves of contact binaries, known as the O'Connell effect, have been identified using the All Sky Automated Survey, All-Sky Automated Survey for Supernovae, Northern Sky Variability Survey, Optical Gravitational Lensing Experiment, and Optical Monitoring Camera sky surveys. The morphology of the mean…
A New X-Ray and Radio Burst Activity from the Magnetar SGR 1935+2154
Ibrahim, Alaa I.; Rehan, Noor S.
SGR 1935+2154 has emerged as the most active magnetar in recent years, exhibiting X-ray burst activity nearly annually and emitting a fast radio burst (FRB 200428 (FRB1)) in its 2020 April activity, for the first time from a Milky Way source, accompanied by an X-ray burst (XFRB1). The source was active again in 2021 September and 2022 J…
GECAM Localization of High-energy Transients and the Systematic Error
Gao, Min; Gong, Ke; Qiao, Rui +63 more
The Gravitational Wave High-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is a pair of microsatellites (i.e., GECAM-A and GECAM-B) dedicated to monitoring gamma-ray transients including the high-energy electromagnetic counterparts of gravitational waves, such as gamma-ray bursts, soft gamma-ray repeaters, solar flares, and terrestrial…
Catalog of the Galactic Population of X-Ray Pulsars in High-mass X-Ray Binary Systems
Kim, Vitaliy; Izmailova, Ildana; Aimuratov, Yerlan
A catalog of the Galactic population of X-ray pulsars in high-mass X-ray binary (HMXB) systems is presented. It contains information about 82 confirmed sources: 18 persistent and 64 transient pulsars. Their basic parameters include spin period, spin evolution with global and local spin-up/spin-down and duration, orbital period, X-ray luminosity, m…
The Long-term Monitoring Results of Insight-HXMT in the First 4 yr Galactic Plane Scanning Survey
Zhang, Shuang-Nan; Liu, Yuan; Wang, Chen +7 more
The first X-ray source catalog of the Insight-HXMT Galactic Plane (∣b∣ < 10°) Scanning Survey (GPSS) is presented based on the data accumulated from 2017 June to 2021 August. The 4 yr limit sensitivities at main energy bands can reach 8.2 × 10-12 erg s-1 cm2 (2-6 keV), 4.21 × 10-11 erg s-1 …
The First Insight-HXMT Gamma-Ray Burst Catalog: The First Four Years
Li, Gang; Ge, Ming-Yu; Ma, Xiang +40 more
The Hard X-ray Modulation Telescope (Insight-HXMT) is China's first X-ray astronomy satellite. It was launched on 2017 June 15. The anticoincidence CsI detectors of the High Energy X-ray telescope (HE) on board Insight-HXMT could serve as an all-sky gamma-ray monitor in about 0.2-3 MeV. In its first four years of operation, Insight-HXMT has detect…
In-orbit Timing Calibration of the Insight-Hard X-Ray Modulation Telescope
Zhang, Shu; Li, Xiaobo; Zhang, Shuang-Nan +24 more
We describe the timing system and the timing calibration results of the three payloads on board the Insight-Hard X-ray Modulation Telescope (Insight-HXMT). These three payloads are the High Energy X-ray telescope (HE; 20-250 keV), the Medium Energy X-ray telescope (ME; 5-30 keV), and the Low Energy X-ray telescope (LE; 1-10 keV). We present a meth…
Linking Extragalactic Transients and Their Host Galaxy Properties: Transient Sample, Multiwavelength Host Identification, and Database Construction
French, K. Decker; Zabludoff, Ann; Behroozi, Peter +7 more
Understanding the preferences of transient types for host galaxies with certain characteristics is key to studies of transient physics and galaxy evolution, as well as to transient identification and classification in the LSST era. Here we describe a value-added database of extragalactic transients-supernovae, tidal disruption events, gamma-ray bu…
Robust Inference of Neutron-star Parameters from Thermonuclear Burst Observations
Galloway, Duncan K.; Goodwin, Adelle; Johnston, Zac +1 more
Thermonuclear (type-I) bursts arise from unstable ignition of accumulated fuel on the surface of neutron stars in low-mass X-ray binaries. Measurements of burst properties in principle enable observers to infer the properties of the host neutron star and mass donors, but a number of confounding astrophysical effects contribute to systematic uncert…
The Second Catalog of Interplanetary Network Localizations of Konus Short-duration Gamma-Ray Bursts
Mitrofanov, I.; Hurley, K.; Yamaoka, K. +72 more
We present the catalog of InterPlanetary Network (IPN) localizations for 199 short-duration gamma-ray bursts (sGRBs) detected by the Konus-Wind (KW) experiment between 2011 January 1 and 2021 August 31, which extends the initial sample of IPN-localized KW sGRBs to 495 events. We present the most comprehensive IPN localization data on these events,…