Supernova 1999bv in MCG +10-25-14
Abstract
G. J. Hill, McDonald Observatory, University of Texas, reports on behalf of the Hobby-Eberly Telescope (HET) Low Resolution Spectrograph (LRS) commissioning team (which also includes M. P. Bergmann, D. A. Howell, J. C. Wheeler, P. J. MacQueen, J. A. Booth, M. T. Adams, M. Eracleus, C. Tejada, F. Cobos, F. Garfias, J. Cuervo, H. Nicklas, W. Mitsch, G. W. Wesley, P. S. Odoms, G. Barczac, L. W. Ramsey, T. G. Barnes III, B. Roman, C. Nance, G. Hill, T. Worthington): "A low-resolution spectrogram (range 400- 1000 nm) of SN 1999bv was obtained on Apr. 21.37 UT with the Marcario LRS, during first light commissioning of the instrument. The broad emission features seen by Jha et al. (IAUC 7150) at 667, 600, 475, and 402 nm are confirmed, and we note that the broad emission (FWHM 10 000 km/s) at 667 nm is consistent with slightly blueshifted H-alpha emission in the rest frame of the supernova. Such emission was also seen in SN 1993J, and is suspected to be an indication of transition, or hybrid type-II/type-Ib/c events, sometimes referred to as type IIb."
- Publication:
-
International Astronomical Union Circular
- Pub Date:
- June 1999
- Bibcode:
- 1999IAUC.7186....2H