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16 papers · 2 filters
What brakes the Crab pulsar?
A. Čadež, L. Zampieri, C. Barbieri +4
Optical observations provide convincing evidence that the optical phase of the Crab pulsar follows the radio one closely. Since optical data do not depend on dispersion measure var…
Supernova 2013fc in a circumnuclear ring of a luminous infrared galaxy: the big brother of SN 1998S
T. Kangas, S. Mattila, E. Kankare +30
We present photometric and spectroscopic observations of SN 2013fc, a bright type II supernova (SN) in a circumnuclear star-forming ring in the luminous infrared galaxy ESO 154-G01…
LSQ13fn: A type II-Plateau supernova with a possibly low metallicity progenitor that breaks the standardised candle relation
J. Polshaw, R. Kotak, L. Dessart +20
We present optical imaging and spectroscopy of supernova (SN) LSQ13fn, a type II supernova with several hitherto-unseen properties. Although it initially showed strong symmetric sp…
The WEBT campaign on the BL Lac object PG 1553+113 in 2013. An analysis of the enigmatic synchrotron emission
C. M. Raiteri, A. Stamerra, M. Villata +2
A multifrequency campaign on the BL Lac object PG 1553+113 was organized by the Whole Earth Blazar Telescope (WEBT) in 2013 April-August, involving 19 optical, two near-IR, and thr…
Supernova 1987A: a Template to Link Supernovae to their Remnants
S. Orlando, M. Miceli, M. L. Pumo +1
The emission of supernova remnants reflects the properties of both the progenitor supernovae and the surrounding environment. The complex morphology of the remnants, however, hampe…
Measuring nickel masses in Type Ia supernovae using cobalt emission in nebular phase spectra
Michael J. Childress, D. John Hillier, Ivo Seitenzahl +34
The light curves of Type Ia supernovae (SNe Ia) are powered by the radioactive decay of Ni to Co at early times, and the decay of Co to Fe from ~60 days…