201 citations · 565 across the 11 of their papers we have counts for
11 papers
The extreme HBL behaviour of Markarian 501 during 2012
M. L. Ahnen, S. Ansoldi, L. A. Antonelli +276
A multiwavelength campaign was organized to take place between March and July of 2012. Excellent temporal coverage was obtained with more than 25 instruments, including the MAGIC,…
Accurate Sky Continuum Subtraction with Fibre-fed Spectrographs
Yanbin Yang, Myriam Rodrigues, Mathieu Puech +10
Fibre-fed spectrographs now have throughputs equivalent to slit spectrographs. However, the sky subtraction accuracy that can be reached has often been pinpointed as one of the maj…
Interpreting the Transmission Windows of Distant Quasars
A. Maselli, A. Ferrara, S. Gallerani
We propose the Apparent Shrinking Criterion (ASC) to interpret the spatial extent, R_w, of transmitted flux windows in the absorption spectra of high-z quasars. The ASC can discrim…
A Null Test of the Metric Nature of the Cosmic Acceleration
A. Buzzi, C. Marinoni, S. Colafrancesco
We discuss the testable predictions of a phenomenological model in which the accelerated expansion of the universe is the result of the action of a non-gravitational force field, r…
21-cm synthesis observations of VIRGOHI 21 - a possible dark galaxy in the Virgo Cluster
Robert Minchin, Jonathan Davies, Michael Disney +10
Many observations indicate that dark matter dominates the extra-galactic Universe, yet no totally dark structure of galactic proportions has ever been convincingly identified. Prev…
Protoclusters associated with z > 2 radio galaxies. I. Characteristics of high redshift protoclusters
B. P. Venemans, H. J. A. Rottgering, G. K. Miley +8
[Abridged] We present the results of a large program conducted with the Very Large Telescope and Keck telescope to search for forming clusters of galaxies near powerful radio galax…