18 citations · 20 across the 2 of their papers we have counts for
3 papers
The Changing-Look Quasar Mrk 590 is Awakening
S. Mathur, K. D. Denney, A. Gupta +9
Mrk 590 was originally classified as a Seyfert 1 galaxy, but then it underwent dramatic changes: the nuclear luminosity dropped by over two orders of magnitude and the broad emissi…
The broad band SEDs of four 'hypervariable' AGN
James S. Collinson, Martin J. Ward, Andy Lawrence +6
We present an optical to X-ray spectral analysis of four 'hypervariable' AGN (HVAs) discovered by comparing Pan-STARRS data to that from SDSS over a 10 year baseline (Lawrence et a…
Reaching the Peak of the Quasar Spectral Energy Distribution I: Observations and Models
James S. Collinson, Martin J. Ward, Chris Done +3
We perform a spectral analysis of a sample of 11 medium redshift (1.5 < z < 2.2) quasars. Our sample all have optical spectra from the SDSS, infrared spectra from GNIRS and TSPEC,…