Multicolor photometry of supernova SN 2012aw in M95

Author: Norbert Reichmann

Article 

published in:

in  BAV Rundbrief Volume 62 (2013)  No.1, page 31 - 39

Mehrfarbenphotometrie der Supernova SN 2012aw in M95

Dieser Bericht handelt vom Nachweis der Entstheung zweier Isotope (Nickel unfd Kobalt) in der Supernova SN 2012aw in M95. Mit Hilfe zweier mathematischer Methoden kann gezeigt werden, wie die Entstehung dieser Isotope in der Supernovaexplosion  in den Lichtkurven zu sehen ist. Alle CCD Beobachtungen wurden durch einen TMB Apo 130/1200, f/9.2 mit einer Apogee Alta U16M CCD Kamera, Chip KAF 16803, in den Ossiacher Tauern, Kärnten, Österreich, auf 890m Seehöhe gewonnen. Durch die photometrischen Filter Johnson/Cousins RcVB konnte ich in 13  Nächten über einen Zeitraum von 88Tagen 96 Daten zum Helligkeitsverlauf der Supernova gewinnen.

Multicolor photometry of supernova SN 2012aw in M95

Abstract - CDS bibliographic service

Abstract: This report informs about radioactive decay of 56-Ni and 56-Co Isotope  and  how  it can be seen in the multicolour photometric lightcurves. Using two methods  it’s possible to show  in sections of linear decline of V and B lightcurves the radioactive decay of 56-Ni and 56-Co Isotope. First method is the surface flux – colour index correlation, second method is the logarithmic ralationship of the magnitude scale.

Three lightcurves for B, V, Rc and two colour index curves for (B-V) and (V-R) of the Supernova SN2012aw are presented. All measurements  are based on CCD observations made with CCD camera Apogee Alta U16M  and TMB Apo 130/1200. This multicolour photometry, during a timespan over 88days between 22.03.2012 and 17.06.2012, started at 6th days after discovery,  were taken from my backyard astronomy site in Köstenberg, mountain Ossiacher Tauern, at an altitude of 890m. 94 observations were collected. The lightcurves in Johnson/Cousins filter B, V and Rc shows very different behavior.