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X-ray monitoring of classical novae in the central region of M31. III. Autumn and winter 2009/10, 2010/11 and 2011/12
M. Henze, W. Pietsch, F. Haberl +7
[Abridged] Classical novae (CNe) represent the major class of supersoft X-ray sources (SSSs) in the central region of our neighbouring galaxy M31. We performed a dedicated monitori…
Measuring cosmological parameters with Gamma-Ray Bursts
Lorenzo Amati, Massimo Della Valle
In a few dozen seconds gamma ray bursts (GRBs) emit up to 10^54 erg in terms of an equivalent isotropically radiated energy Eiso, so they can be observed up to z ~10. Thus, these p…
SN 2012ca: a stripped envelope core-collapse SN interacting with dense circumstellar medium
C. Inserra, S. J. Smartt, R. Scalzo +16
We report optical and near-infrared observations of SN 2012ca with the Public ESO Spectroscopy Survey of Transient Objects (PESSTO), spread over one year since discovery. The super…
GRB 081007 and GRB 090424: the surrounding medium, outflows and supernovae
Zhi-Ping Jin, Stefano Covino, Massimo Della Valle +34
We discuss the results of the analysis of multi-wavelength data for the afterglows of GRB 081007 and GRB 090424, two bursts detected by Swift. One of them, GRB 081007, also shows a…
X-ray source variability study of the M 31 central field using Chandra HRC-I
F. Hofmann, W. Pietsch, M. Henze +5
[Abridged] The central field of the Andromeda galaxy (M 31) has been monitored, using the Chandra HRC-I detector (about 0.1-10 keV energy range) from 2006 to 2012 with the main aim…
The distance to NGC1316 (Fornax A): yet another curious case
Michele Cantiello, Aniello Grado, John P. Blakeslee +6
The distance of NGC1316, the brightest galaxy in Fornax, is an interesting test for the cosmological distance scale. First, because Fornax is the 2nd largest cluster of galaxies at…