I. Agudo

Multi-messenger Observations of a Binary Neutron Star

On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of

Flaring Behavior of the Quasar 3C 454.3 Across the Electromagnetic Spectrum

\sim 1.7\,{\rm{s}}

LOCATION OF γ-RAY FLARE EMISSION IN THE JET OF THE BL LACERTAE OBJECT OJ287 MORE THAN 14 pc FROM THE CENTRAL ENGINE

with respect to the merger time. From the gravitational-wave signal, the source was initially localized to a sky region of 31 deg2 at a luminosity distance of

Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71 III.Rapid and correlated flux density variability from radio to sub-mm bands

{40}_{-8}^{+8}

Jet Stability and the Generation of Superluminal and Stationary Components

Mpc and with component masses consistent with neutron stars. The component masses were later measured to be in the range 0.86 to 2.26

Results of WEBT, VLBA and RXTE monitoring of 3C 279 during 2006-2007 ⋆

\,{M}_{\odot }

SPECTRAL EVOLUTION OF SUPERLUMINAL COMPONENTS IN PARSEC-SCALE JETS

. An extensive observing campaign was launched across the electromagnetic spectrum leading to the discovery of a bright optical transient (SSS17a, now with the IAU identification of AT 2017gfo) in NGC 4993 (at

THE BRIGHTEST GAMMA-RAY FLARING BLAZAR IN THE SKY: AGILE AND MULTI-WAVELENGTH OBSERVATIONS OF 3C 454.3 DURING 2010 NOVEMBER

\sim 40\,{\rm{Mpc}}

Faraday Rotation and Polarization Gradients in the Jet of 3C?120: Interaction with the External Medium and a Helical Magnetic Field?

) less than 11 hours after the merger by the One-Meter, Two Hemisphere (1M2H) team using the 1 m Swope Telescope. The optical transient was independently detected by multiple teams within an hour. Subsequent observations targeted the object and its environment. Early ultraviolet observations revealed a blue transient that faded within 48 hours. Optical and infrared observations showed a redward evolution over ~10 days. Following early non-detections, X-ray and radio emission were discovered at the transients position

The high activity of 3C 454.3 in autumn 2007. Monitoring by the WEBT during the AGILE detection

\sim 9