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Paving the way to simultaneous multi-wavelength astronomy
M. J. Middleton, P. Casella, P. Gandhi +49
Whilst astronomy as a science is historically founded on observations at optical wavelengths, studying the Universe in other bands has yielded remarkable discoveries, from pulsars…
Exploratory X-ray Monitoring of Luminous Radio-Quiet Quasars at High Redshift: No Evidence for Evolution in X-ray Variability
Ohad Shemmer, W. N. Brandt, Maurizio Paolillo +4
We report on the second installment of an X-ray monitoring project of seven luminous radio-quiet quasars (RQQs). New {\sl Chandra} observations of four of these, at $4.10\leq z\leq…
Revealing structure and evolution within the corona of the Seyfert galaxy I Zw 1
D. R. Wilkins, L. C. Gallo, C. V. Silva +3
X-ray spectral timing analysis is presented of XMM-Newton observations of the narrow line Seyfert 1 galaxy I Zwicky 1 (I Zw 1) taken in 2015 January. After exploring the effect of…
Tracing the accretion history of supermassive Black Holes through X-ray variability: results from the Chandra Deep Field-South
M. Paolillo, I. Papadakis, W. N. Brandt +15
We study the X-ray variability properties of distant AGNs in the Chandra Deep Field-South region over 17 years, up to , and compare them with those predicted by models bas…
The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the extended Baryon Oscillation Spectroscopic Survey and from the second phase of the Apache Point Observatory Galactic Evolution Experiment
Bela Abolfathi, D. S. Aguado, Gabriela Aguilar +344
The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since July 2014. This paper describes the second data release from this phase, and the fourtee…
The Time-Domain Spectroscopic Survey: Target Selection for Repeat Spectroscopy
Chelsea L. MacLeod, Paul J. Green, Scott F. Anderson +35
As astronomers increasingly exploit the information available in the time domain, spectroscopic variability in particular opens broad new channels of investigation. Here we describ…