[vsnet-alert 13508] Re: (fwd) V503 Cyg superoutburst & nearby variable stars

[Brian Skiff]

     Somewhat more accurate coordinates for the red star:

star 1:  20 28 14.55 +43 39 25.7  (J2000, 2MASS)
         southeastern of 9" pair, which perhaps can cause some
         problems with photometry at small image-scales

---  this contributes to IRAS Z20264+4329, but this is a composite
     source with another faint, very red star ~1' north; they were
     resolved by AKARI, which indicates the emission-line star 
     dominates in its 9-micron passband (similar to the IRAS 12mu
     passband).  the emission star is also present in the MSX6C
     'A' band, again like the IRAS 12mu/AKARI 9mu filters, all of
     which cover the 10-micron emission feature in cool stars

source   flux (Jy)
IRAS      1.5
MSX6C     0.35
AKARI     0.53

...which suggests variability as well.


> Star 1
> RA: 20:28:14.435
> DEC: +43:39:26.80 (J2000)
> 
> Star 2  (identified as 137 on the AAVSO finder chart)
> RA: 20:27:41.959
> DEC: +43:44:55.35 (J2000)
> 
> The first star is a very red star with both short- and long-term =
> variation, while the second star is an asymmetric eclipsing binary. The =
> coverage of my own observations is limited.

> Colin Littlefield