activity
19992026
most citedThe afterglow, the redshift, and the extreme energetics of the gamma-ray burst 990123

424 citations · 5.3k across the 68 of their papers we have counts for

collaborators

69 papers

astro-ph.IM2026

The Fast Transient Foreground Fog of LSST

G. Megias Homar, S. R. Kulkarni, C. S. Lage +3

Studies with 1-m class telescopes have now established that glints from satellites and space debris are the main obstacles to searches for sub-minute optical transients. Here, we r…

astro-ph.HE2024

A New Broadband Spectral State in the Ultraluminous X-ray Source Holmberg IX X-1

D. J. Walton, M. Bachetti, P. Kosec +12

We present a series of five new broadband X-ray observations of the ultraluminous X-ray source Holmberg IX X-1, performed by - and in coordination. The first…

astro-ph.HE2024

Next Generation Accretion Disk Reflection Model: High-Density Plasma Effects

Yuanze Ding, Javier A. García, Timothy R. Kallman +5

Luminous accretion disks around black holes are expected to have densities of cm, which are high enough such that plasma physics effects become important.…

astro-ph.HE2023★ 1 cited

BASS XLII: The relation between the covering factor of dusty gas and the Eddington ratio in nearby active galactic nuclei

C. Ricci, K. Ichikawa, M. Stalevski +25

Accreting supermassive black holes (SMBHs) located at the center of galaxies are typically surrounded by large quantities of gas and dust. The structure and evolution of this circu…

astro-ph.GA2023

BASS XXXIV: A Catalog of the Nuclear Mm-wave Continuum Emission Properties of AGNs Constrained on Scales 100--200 pc

Taiki Kawamuro, Claudio Ricci, Richard F. Mushotzky +25

We present a catalog of the millimeter-wave (mm-wave) continuum properties of 98 nearby ( 0.05) active galactic nuclei (AGNs) selected from the 70-month Swift/BAT hard X-ray c…

astro-ph.HE2023★ 14 cited

BASS-XL: X-ray variability properties of unobscured Active Galactic Nuclei

Alessia Tortosa, Claudio Ricci, Patricia Arévalo +15

We investigate the X-ray variability properties of Seyfert1 Galaxies belonging to the BAT AGN Spectroscopic Survey (BASS). The sample includes 151 unobscured (N c…