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48 papers · 2 filters
Observatory science with eXTP
Jean J. M. in 't Zand, Enrico Bozzo, Jinlu Qu +181
In this White Paper we present the potential of the enhanced X-ray Timing and Polarimetry (eXTP) mission for studies related to Observatory Science targets. These include flaring s…
Accretion in Strong Field Gravity with eXTP
Alessandra De Rosa, Phil Uttley, Lijun Gou +99
In this paper we describe the potential of the enhanced X-ray Timing and Polarimetry (eXTP) mission for studies related to accretion flows in the strong field gravity regime around…
Dense matter with eXTP
Anna L. Watts, Wenfei Yu, Juri Poutanen +73
In this White Paper we present the potential of the Enhanced X-ray Timing and Polarimetry (eXTP) mission for determining the nature of dense matter; neutron star cores host an extr…
Searches for Continuous Gravitational Waves from Fifteen Supernova Remnants and Fomalhaut b with Advanced LIGO
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1129
We describe directed searches for continuous gravitational waves from sixteen well localized candidate neutron stars assuming none of the stars has a binary companion. The searches…
Thermonuclear X-ray bursts in rapid succession in 4U 1636-536 with AstroSat-LAXPC
Aru Beri, Biswajit Paul, J S Yadav +12
We present results from an observation of the Low Mass X-ray Binary 4U 1636-536 obtained with the LAXPC instrument aboard AstroSat. The observations of 4U 1636-536 made during the…
The Powerful Jet and Gamma-Ray Flare of the Quasar PKS 0438436
Brian Punsly, Andrea Tramacere, Preeti Kharb +1
PKS 0438436 at a redshift of has been previously recognized as possessing perhaps the most luminous known synchrotron jet. Little is known about this source since the…
Post-Newtonian Dynamics in Dense Star Clusters: Formation, Masses, and Merger Rates of Highly-Eccentric Black Hole Binaries
Carl L. Rodriguez, Pau Amaro-Seoane, Sourav Chatterjee +5
Using state-of-the-art dynamical simulations of globular clusters, including radiation reaction during black hole encounters and a cosmological model of star cluster formation, we…
Study of timing evolution from non-variable to structured large-amplitude variability transition in GRS 1915+105 using AstroSat
Divya Rawat, Mayukh Pahari, J S Yadav +6
In this work, we present a 90 ks continuous monitoring of the Galactic micro-quasar GRS 1915+105 with AstroSat when the source undergoes a major transition from a non-variabl…
Follow-up Timing of Three GMRT Pulsars
Mayuresh P. Surnis, Bhal Chandra Joshi, Maura A. McLaughlin +3
We report on the results of multi-frequency follow-up observations of three pulsars (PSRs J0026+6320, J2208+5500 and J2217+5733) discovered with the Giant Metrewave Radio Telescope…
Binary Black Hole Population Properties Inferred from the First and Second Observing Runs of Advanced LIGO and Advanced Virgo
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1138
We present results on the mass, spin, and redshift distributions with phenomenological population models using the ten binary black hole mergers detected in the first and second ob…
GWTC-1: A Gravitational-Wave Transient Catalog of Compact Binary Mergers Observed by LIGO and Virgo during the First and Second Observing Runs
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1148
We present the results from three gravitational-wave searches for coalescing compact binaries with component masses above 1 during the first and second observing…
Post-Newtonian Dynamics in Dense Star Clusters: Binary Black Holes in the LISA Band
Kyle Kremer, Carl L. Rodriguez, Pau Amaro-Seoane +8
The dynamical processing of black holes in the dense cores of globular clusters (GCs), makes them efficient factories for producing binary black holes (BBHs). Here we explore the p…
A study of a tilted thin inner accretion disk around a spinning black hole
Srimanta Banerjee, Chandrachur Chakraborty, Sudip Bhattacharyya
The inner part of a thin accretion disk around a Kerr black hole can serve as an important tool to study the physics of the strong gravity regime. A tilt in such a disk with respec…
A Strong Jet Signature in the Late-Time Lightcurve of GW170817
K. P. Mooley, D. A. Frail, D. Dobie +19
We present new 0.6-10 GHz observations of the binary neutron star merger GW170817 covering the period up to 300 days post-merger, taken with the Karl G. Jansky Very Large Array, th…
Possible phase-dependent absorption feature in the x-ray spectrum of the middle-aged PSR J0659+1414
Prakash Arumugasamy, Oleg Kargaltsev, Bettina Posselt +2
We report on the energy-resolved timing and phase-resolved spectral analysis of X-ray emission from PSR J0659+1414 observed with XMM-Newton and NuSTAR. We find that the new data ru…
Classification of Subpulse Drifting in Pulsars
Rahul Basu, Dipanjan Mitra, George I. Melikidze +1
In this study we propose a classification scheme for the phenomenon of subpulse drifting in pulsars. We have assembled an exhaustive list of pulsars which exhibit subpulse drifting…
AstroSat and Chandra view of the high soft state of 4U 1630-47 (4U 1630-472): evidence of the disk wind and a rapidly spinning black hole
Mayukh Pahari, Sudip Bhattacharyya, A R Rao +8
We present the X-ray spectral and timing analysis of the transient black hole X-ray binary 4U 1630-47, observed with the AstroSat, Chandra and MAXI space missions during its soft X…
Constraining Compact Object Formation with 2M0521
Katelyn Breivik, Sourav Chatterjee, Jeff J. Andrews
We show that the recently discovered binary 2M05215658+4359220 (2M0521), comprised of a giant star (GS) orbiting a suspected black hole (BH) in a ~80 day orbit, may be instrumental…
A Fermi Gamma-ray Burst Monitor Search for Electromagnetic Signals Coincident with Gravitational-Wave Candidates in Advanced LIGO's First Observing Run
ray Burst Monitor Team, The LIGO Scientific Collaboration, the Virgo Collaboration +1160
We present a search for prompt gamma-ray counterparts to compact binary coalescence gravitational wave (GW) candidates from Advanced LIGO's first observing run (O1). As demonstrate…
Constraining the p-mode--g-mode tidal instability with GW170817
The LIGO Scientific Collaboration, The Virgo Collaboration, B. P. Abbott +1136
We analyze the impact of a proposed tidal instability coupling -modes and -modes within neutron stars on GW170817. This non-resonant instability transfers energy from the orb…
Temporal variability and estimation of jet parameters for Ton 599
S. R. Patel, V. R. Chitnis, A. Shukla +2
The TeV blazar Ton 599 has exhibited a peculiar flare in 2017 November. The temporal variation of the source is studied using simultaneous -ray data from Large…
Constraining the relativistic mean-field model equations of state with gravitational wave observations
Rana Nandi, Prasanta Char, Subrata Pal
The first detection of gravitational waves from the binary neutron star merger event GW170817 has started to provide important new constraints on the nuclear equation of state at h…
Authenticating the Presence of a Relativistic Massive Black Hole Binary in OJ 287 Using its General Relativity Centenary Flare: Improved Orbital Parameters
Lankeswar Dey, M. J. Valtonen, A. Gopakumar +5
Results from regular monitoring of relativistic compact binaries like PSR 1913+16 are consistent with the dominant (quadrupole) order emission of gravitational waves (GWs). We show…
Black hole demographics from TDE modeling
T. Mageshwaran, A. Mangalam
The occurrence rate of tidal disruption events (TDEs) by survey missions depend on the black hole mass function of the galaxies, properties of the stellar cusp and mass of the cent…