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[vsnet-chat 6548] Re:Position of V449 Lyr (was [AAVSO-DIS] V449 Lyr - does AAVSO want my data?)



I have checked, and tass does not have any data on this star.  We will get 
there in about 3 months and then it will depend on how bright it is in I 
and how good the nights are when it transits.  Looks like it is just at the 
edge of what we will see.

Tom Droege

At 03:08 PM 6/11/03 +1000, Mati Morel wrote:
>    Before Tom K. starts submitting data on V449 Lyr, I respectfully suggest
>he specify exactly which star he has observed. There is some developing
>confusion about the position of V449 Lyr.
>Firstly, the coordinates published by Romano (and used by Guide 8) are bad.
>Please disregard.
>Secondly, Romano's finder chart is quite clear. His variable, no. 249, is
>the middle star in a line of three running SW-NE.
>See IBVS 645.  This is my understanding of the identity of V449 Lyr, unless
>he has published a later correction, somewhere ...
>Coordinates for these stars are as follows (from B1.0), and mb from A2.0.
>    #           (2000)                               mb
>   1      19:07:35.66   +43:59:53.9      14.9   (GCVS id)
>   2      19:07:37.07   +44:00:20.1      15.0   (Romano)
>   3      19:07:38.63   +44:00:43.3      12.4
>
>Star 1 is listed in the GCVS, but appears to be in error.
>Star 2 is Romano's variable 249 = V449 Lyr, on his finder chart.
>The rough position published in IBVS 3701 is consistent with star 2.
>Perhaps the published maximum mag. for this star is a typo, or the result of
>confusion with star 3.
>The B1.0 magnitudes for star 2 are as follows :  B1 = 15.94, B2 = 18.20, R1
>= 14.43, R2 = 15.58, I =14.04.
>
>Regards,
>Mati
>
>----- Original Message -----
>From: "Brian Skiff" <Brian.Skiff@lowell.edu>
>To: <dhkaiser@sprynet.com>
>Cc: <aavso-discussion@informer2.cis.McMaster.CA>
>Sent: Wednesday, June 11, 2003 7:25 AM
>Subject: Re: [AAVSO-DIS] V449 Lyr - does AAVSO want my data?
>
>
> >      It is worth noting that there is indeed _no_ published study of
> > this star, and only recently have the GCVS group given a precise
> > position for the star.  The current 'best' position is from 2MASS:
> >
> > V449 Lyr   19 07 35.68  +43 59 53.0 (J2000)
> >
> > SIMBAD shows only the discovery paper, which has no lightcurve
>information,
> > and Mati Morel's IBVS flyer with a somewhat improved position (the on-line
> > GCVS is better still, and the 2MASS position more-or-less definitive).
> > The star is fairly faint on all Schmidt plate scans, so (as Mati
>suggested)
> > the nominal maximum magnitude could be too bright.
> >      I note that the 2MASS J-K color is about 0.6, which is the color of
> > an unreddened K0 giant.  Thus instead of an Algol- or W UMa-type eclipser,
> > it could be an RS CVn type---assuming the classification as an ecliper
> > is correct at all.
> >
> > \Brian
> > _______________________________________________
> > aavso-discussion mailing list
> > aavso-discussion@mailman.McMaster.CA
> > http://mailman.McMaster.CA/mailman/listinfo/aavso-discussion
>
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