SDSS J102146.44+234926.3: New WZ Sge-type dwarf nova

Details SDSS J102146.44+234926.3: New WZ Sge-type dwarf nova SDSS J102146.44+234926.3: New WZ Sge-type dwarf nova

2007-04-10

arxiv.org/abs/0704.1276v2

2007IBVS.5763....1G

Astronomy and Astrophysics

Astrophysics

Published in IAU IBVS 5763

Scientific paper

We report CCD photometry and spectroscopy during 2006 outburst of the dwarf nova SDSS J102146.44+234926.3 (SDSS J1021). The photographic plates from the MAO, SAI and CrAO plate archives, which cover the position of the SDSS J1021, were inspected for the presence of previous outbursts. We also present the BVRcIc photometric calibration of 52 stars in SDSS J1021 vicinity, which have V-magnitude in the range of 11.21-17.23m and can serve as comparison stars. The large amplitude of the SDSS J1021 outburst of 7m, superhumps with a period below the ''period gap'', rebrightening during the declining stage of superoutburst, rarity of outbursts and obtained spectrum allow to classify this object as a WZ Sge type dwarf nova.

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