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Special Notice #104: Photometric Sequence for V2491 Cyg now Available [Nova Cyg 2008 No. 2]

April 17, 2008

V2491 Cyg (Nova Cyg 2008 #2) now has a two-night BVRI photometric calibration from Sonoita Research Observatory.  A sequence based on that calibration has been uploaded to VSP/VSD and is now available when you download a chart.  This sequence should be adequate until the nova fades below V=13.5, at which time we will update the sequence.  A .dat calibration file will be available shortly.  Last reports to the AAVSO show the nova at V=9.6, but relatively constant since the rapid fade from its peak at V=7.4.

Lynch, et al. (IAUC 8935) indicate that this nova has a highly unusual spectrum.  Ibarra and Kuulkers (ATEL 1473, 1480) point out that this nova has been an X-ray source for several years and is being followed currently with Swift.

Continue observing this peculiar nova!

Arne Henden

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