Zet Crb possibly changes magnitude?
Posted: Mon Aug 09, 2004 6:42 pm
WOLF has just started to analyze magnitude changes in CI, and with the addition of the cosmic rays elimination the output seems to be effective. Checking the output might be a time-consuming task, but I hope that this application will turn to be cost-effective overall, since the probablity for discoveries might be higher than just picking random star.
Anyway, last night WOLF indicated 5 stars' magnitude changes, of which I have only examined one. The one that I checked appeared to be Zet Crb:
In the frame ci040808ut214428p.fits, Zet Crb (appears at coordinates 671,513) is about 15.5 sigmas brighter than its background. However, in the frame ci040803ut214458p.fits (taken approximately at the same sidereal time), it is only 10.6 sigmas brighter than the background. Both pictures seem clear, and the background level is approximately the same (sigma=25.5). Zet Crb neighbors do not seem to behave in the same manner.
I believe the Zet Crb is a double star, and each of the two stars has a different color. One is blue and the other is orange.
Anyway, last night WOLF indicated 5 stars' magnitude changes, of which I have only examined one. The one that I checked appeared to be Zet Crb:
In the frame ci040808ut214428p.fits, Zet Crb (appears at coordinates 671,513) is about 15.5 sigmas brighter than its background. However, in the frame ci040803ut214458p.fits (taken approximately at the same sidereal time), it is only 10.6 sigmas brighter than the background. Both pictures seem clear, and the background level is approximately the same (sigma=25.5). Zet Crb neighbors do not seem to behave in the same manner.
I believe the Zet Crb is a double star, and each of the two stars has a different color. One is blue and the other is orange.