November 5, 2010: We have been informed by Tim Puckett and by the Central Bureau for Astronomical Telegrams (CBET 2532, Daniel W. E. Green, Ed.) of the discovery of a bright possible supernova in UGC 5189A by J. Newton and Puckett, Portal, AZ, on November 3.52 UT at unfiltered magnitude 13.5. Confirming images (limiting magnitude 19.1) by Puckett on Nov. 4.50 UT showed the object at magnitude 12.9./p>
Spectroscopic observations (CBET 2536, Daniel W. E. Green, Ed.) by S. Benetti and F. Bufano, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova, on behalf of a larger collaboration, and by J. Vinko, University of Szeged, G. H. Marion, Harvard-Smithsonian Center for Astrophysics and University of Texas, T. Pritchard, Pennsylvania State University, and J. C. Wheeler and E. Chatzopoulos, University of Texas, show that SN 2010jl is a type-IIn supernova. Vinko et al. also report that simultaneous measurements with Swift/UVOT in the ultraviolet bands confirm that the transient is ultraviolet-bright, as expected for young, interacting supernovae.
Coordinates: 09 42 53.33 +09 29 41.8 (J2000.0)
This position is 2.4" east and 7.7" north of the center of UGC 5189A.
Puckett has posted a finding chart at website URL
Charts for SN 2010jl (AUID 000-BJX-206) may be plotted by entering the object name into the Variable Star Plotter (VSP):
Please use the name SN 2010jl when submitting data to the AAVSO International Database.
This AAVSO Special Notice was prepared by Elizabeth O. Waagen.
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