[vsnet-alert 6627] V4740 Sgr rapid oscillations?

[Fraser Farrell <fraser@trilobytes.com.au>]

Following a suggestion from Alfredo Pereira I attempted multiple 
observations of V4740 Sgr (Nova Sgr 2001 #3) earlier tonight. Although I 
was often impeded by cloud, there is clear evidence of magnitude changes 
on a short timescale:

star      YYYYMMDD.(UT)  mag
SGRV4740  20010914.436   74
SGRV4740  20010914.440   70
SGRV4740  20010914.446   71
SGRV4740  20010914.479   73
SGRV4740  20010914.482   75
SGRV4740  20010914.532   72

7x50 binoculars, AAVSO sequence. The nova and its comparisons are readily 
encompassed in a single 7x50 starfield, so it's easy to know when clouds 
obscure the view. I conclude that these variations are real.

It's not possible to say (yet) if these variations are periodic, but high 
speed photometry may prove interesting either way.


cheers,
Fraser Farrell

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