RT Journal Article T1 The first confirmed superoutburst of the SU UMa type dwarf nova SDSS J083931.35+282824.0 A1 Shears, Jeremy A1 Miguel Agustino, Enrique de A1 Roberts, George A1 Collins, Donald F. A1 Myers, Gordon A1 Campbell, Tut AB We report unfiltered CCD photometry of the first confirmed superoutburst of the recently discovered dwarf nova, SDSS J083931.35+282824.0 in April 2010. From a quiescence magnitude of ~19.8 it rose to 14.0, an outburst amplitude of at least 5.8 magnitudes. Only the plateau phase of the outburst was observed during which superhumps with peak-to-peak amplitude of up to 0.28 magnitudes were present, confirming this to be an SU UMa type dwarf nova. The mean superhump period was Psh = 0.07836(2) during the first 3 days and this subsequently decreased to 0.07800(3) d. Analysis of the data revealed tentative evidence for an orbital period Porb = 0.07531(25) d. The fractional superhump period excess was ε = 0.039(6), which is consistent with other dwarf novae of similar orbital period. PB Cornell University YR 2010 FD 2010 LK https://hdl.handle.net/10272/21761 UL https://hdl.handle.net/10272/21761 LA eng NO Shears, J., de Miguel, E., Roberts, G., Collins, D. F., Myers, G., & Campbell, T. (2010). The first confirmed superoutburst of the SU UMa type dwarf nova SDSS J083931.35+282824.0 (Version 1). arXiv. https://doi.org/10.48550/ARXIV.1011.5321 DS Repositorio Institucional de la Universidad de Huelva RD 31 may 2026