4 papers
The History and Environment of a Faded Quasar: Hubble Space Telescope observations of Hanny's Voorwerp and IC 2497
William C. Keel, Chris J. Lintott, Kevin Schawinski +6
We present Hubble Space Telescope imaging and spectroscopy for the extended high-ionization cloud known as Hanny's Voorwerp, near the spiral galaxy IC 2497. WFC3 images show comple…
Hanny's Voorwerp: Evidence of AGN activity and a nuclear starburst in the central regions of IC 2497
H. Rampadarath, M. A. Garrett, G. I. G. Józsa +7
We present high- and intermediate resolution radio observations of the central region in the spiral galaxy IC 2497, performed using the European VLBI Network (EVN) at 18 cm, and th…
Galaxy Zoo : 'Hanny's Voorwerp', a quasar light echo?
Chris Lintott, Kevin Schawinski, William Keel +17
We report the discovery of an unusual object near the spiral galaxy IC 2497, discovered by visual inspection of the Sloan Digital Sky Survey (SDSS) as part of the Galaxy Zoo projec…
Revealing Hanny's Voorwerp: radio observations of IC 2497
G. I. G. Jozsa, M. A. Garrett, T. A. Oosterloo +7
We present multi-wavelength radio observations in the direction of the spiral galaxy IC 2497 and the neighbouring emission nebula known as "Hanny's Voorwerp". Our WSRT continuum ob…