SN1993J at 15.2 GHz

D.A. Green and G.G. Pooley

The figure and data below give the radio flux density of SN1993J at 15.2 GHz, as observed by the Ryle Telescope.

• The observations for the first 115 days after the SN explosion have been published previously by Pooley G.G. & Green D.A. (1993, MNRAS, 264, L17), whereas the data presented here extend to about 500 days after the SN explosion.
• These extended results are also displayed in Ho L.C., Van Dyk S.D., Pooley G.G., Sramek R.A. & Weiler K.W. (1999, AJ, 118, 843), together with Ryle observations of the variation of the core of M81 at 15.2 GHz (and VLA observations at other frequencies).
• The data below are for Stokes parameter I+Q, and have been recalibrated, based on a flux density of 1.70 Jy for 3C48 and a smooth variation in the flux density of the nearby calibrator source B0954+658. Therefore there are small differences in flux densities for the first 115 days compared with those previously published.
• The MJD is given for the centre of each observation, which vary in duration, but are typically 1 to 2 hours long. The uncertainty in flux densities are thought to be better than 5 per cent, due to uncertainties in the flux density calibration.

The data are available as an ascii file. If you wish to use these data, please cite both the published Pooley G.G. & Green D.A. (1993) paper, and also a private communication from Green D.A. & Pooley G.G. for these extended data.