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Date and Time of the Query: 2019-08-22 T04:18:57 PDT
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For refcode 2007MNRAS.381..280M:
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Copyright by Royal Astronomical Society. 2007MNRAS.381..280M Type IIP supernova SN 2004et: a multiwavelength study in X-ray, optical and radio Kuntal Misra, Dave Pooley, Poonam Chandra, D. Bhattacharya, Alak K. Ray, Ram Sagar and Walter H. G. Lewin Abstract. We present X-ray, broad-band optical and low-frequency radio observations of the bright type IIP supernova SN 2004et. The Chandra X-ray Observatory observed the supernova at three epochs, and the optical coverage spans a period of ~470 d since explosion. The X-ray emission softens with time, and we characterize the X-ray luminosity evolution as L_X_ is proportional to t^-0.4^. We use the observed X-ray luminosity to estimate a mass-loss rate for the progenitor star of ~2 x 10^-6^ M_sun_ yr^-1^. The optical light curve shows a pronounced plateau lasting for about 110 d. Temporal evolution of photospheric radius and colour temperature during the plateau phase is determined by making blackbody fits. We estimate the ejected mass of ^56^Ni to be 0.06 +/- 0.03 M_sun_. Using the expressions of Litvinova & Nadeezhin we estimate an explosion energy of (0.98 +/- 0.25) x 10^51^ erg. We also present a single epoch radio observation of SN 2004et. We compare this with the predictions of the model proposed by Chevalier, Fransson & Nymark. These multiwavelength studies suggest a main-sequence progenitor mass of ~20 M_sun_ for SN 2004et. Key words: techniques: photometric, supernovae: general, supernovae: individual: SN 2004et
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