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----- Original Message ----- From: "JG" <jg@jgjs.freeserve.co.uk> To: "Sebastian Otero" <varsao@fullzero.com.ar> Sent: Saturday, October 11, 2003 6:26 AM Subject: Re: New chart for Nova Cir 2003 - urgent > On 11 Oct 2003 Sebastian Otero wrote: > > > Dear colleagues, > > > > The nova is very much fainter than expected so a new chart was made to > > observe it. > > Last night it was fainter than the whole sequence in the previous chart, > > shining at visual magnitude 10.0. > > Sicne the discovery was made with a red filter and the variable looks orange to > > the eye, this probably explains the difference between the visual magnitude and > > the discovery data. John Greaves noted that there was a 10th magnitude > > observation in ASAS-3 so the observations indicate it never got much brighter > > than 9-10th mag. in the visual. What seems to be a possible bright nova was > > actually one of the dimmest recently. > > > > CIRnova2003 20031009.986 9.81V ASA > > > > Charts: > > > > The new chart is available at: > > http://ar.geocities.com/varsao/Carta_DE_Cir_tel.htm > > > > The binocular chart was updated with a more accurate position and a possible > > problematic comparison star (binary) (928) was removed. > > http://ar.geocities.com/varsao/Carta_DE_Cir.htm > errrm, I did actually note that the ASAS3 observation was ~1.0 days after the Liller discovery observation, so it being brighter even at V at that earlier time is not precluded, especially dependent on where the ASAS3 upper cut off threshold is (ie were data gets rejected as saturated). ;-) Incidentally, now it's fainter the improved astrometry will be of interest. The current(?) Nelson best value is about an arcsec or two south of an orange star (2MASS undereddened colours) that has meagre evidence of low amplitude variability [differing brigthness on comparison of two red plates in (CDS) aladin, though admittedly the same plates sourced via NOFS don't seem to show the same... ...a matter of digitization I suppose. Also, 0.8 difference between J magnitudes from DENIS 2nd and 2MASS allsky, being absent in USNO B1.0 but in GSC2.2 at 'V' ~ 17]. Cheers John --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://vsnet.grisoft.com). Version: 6.0.525 / Virus Database: 322 - Release Date: 09/10/03
Return to the Powerful Daisaku Nogami
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