8 papers · 1 filter
Supernova Statistics
Enrico Cappellaro, Roberto Barbon, Massimo Turatto
The statistics of SN discoveries is used to reveal selection biases of past and current SN searches and to gain insight on the progenitor scenarios for the different SN types. We a…
The tetra-lobed planetary nebula NGC 1501
Franco Sabbadin, Stefano Benetti, Enrico Cappellaro +1
Direct imagery and long-slit, spatially resolved echellograms of the high excitation planetary nebula NGC 1501 allowed us to study in detail the expansion velocity field, the physi…
Tomography of the low excitation planetary nebula NGC 40
F. Sabbadin, E. Cappellaro, S. Benetti +2
Spatially resolved, long-slit echellograms at different position angles of the bright, low excitation planetary nebula NGC 40 indicate that, the higher is the gas excitation, the f…
SNIa light curves and radioactive decay
E. Cappellaro, P. A. Mazzali, S. Benetti +4
The absolute V light curves of 5 SNe Ia, selected to represent the known range of absolute luminosities at maximum for this class of objects, are presented. Comparison of the long…
The rate of Supernovae from the combined sample of five searches
E. Cappellaro, M. Turatto, D. Yu. Tsvetkov +4
With the purpose to obtain new estimates of the rate of supernovae we joined the logs of five SN searches, namely the Asiago, Crimea, Cal{á}n-Tololo and OCA photographic surveys an…
The rate of supernovae: biases and uncertainties
Enrico Cappellaro, Massimo Turatto
Using an updated SN list and galaxy parameters from the RC3 catalog, we have revisited two well know biases affecting SN searches. We show that the bias in the central region of ga…