Initial results from the LIGO Newtonian calibrator

VLBA Calibrator Survey: Astrometric and Image Results

Positions and maps of 1608 new compact sources were obtained in twelve sessions observed during 1994–2002 at the VLBA network at 8.4/2.3 GHz. These sources are recommended for use as calibrators for phase reference imaging and as geodetic sources for astrometric/geodetic VLBI applications.

Seismic isolation enhancements for initial and Advanced LIGO

A seismic isolation system for the proposed 'Advanced LIGO' detector upgrade is under development. It consists of a two-stage in-vacuum active isolation platform that is supported by an external hydraulic actuation stage. A full-scale preliminary-design technology demonstrator of the in-vacuum platform has been assembled and is being tested at Stanford's engineering test facility. Unanticipated...

A directed search for gravitational waves from Scorpius X-1 with initial LIGO

GW150914: First results from the search for binary black hole coalescence with Advanced LIGO

B. P. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration) (Received 9 March 2016; published 7 June 2016) On September 14, 2015, at 09∶50:45 UTC the two detectors of the Laser Interferometer GravitationalWave Observatory (LIGO) simultaneously observed the binary black hole merger GW150914. We report the results of a matched-filter search using relativistic models of compact-obj...

Towards a first design of a Newtonian-noise cancellation system for Advanced LIGO

M Coughlin, N Mukund, J Harms, 4 J Driggers, R Adhikari, and S Mitra Department of Physics, Harvard University, Cambridge, MA 02138, USA Inter-University Centre for Astronomy and Astrophysics , Ganeshkhind, Pune University Campus Pune 411 007, India Università degli Studi di Urbino “Carlo Bo”, I-61029 Urbino, Italy INFN, Sezione di Firenze, Firenze 50019, Italy LIGO Hanford Observatory, Richlan...