Dr. Jan Budaj has published an alternative disk model (using your observations!) that explains the mid eclipse brightening without the need for a hole in the disk. He has written an explanation of the new model. Click here to read it in our forums.
I thought I would issue a plug for a talk I'm giving shortly. On this Thursday, July 28 at 8:00 PM I will be presenting a talk on epsilon Auriage and Citizen Science at Nebraska Nature and Visitor's Center during the Platte Valley Astronomical Observers's monthly meeting. Weather permitting, we'll also have an observing session afterward. So, if you happen to be somewhere nearby we'd be happy to have you attend.
The AAVSO and Citizen Sky will be hosting three online chat sessions for beginners to variable star observing during the week of July 25, 2011. Below are the list of the chat topics. However, feel free to bring up any topic at any chat.
The chat room can be accessed by pointing your browser here. Details about how to use dedicated chat clients are here.
Beginner Chat #1: Visual Observing
Monday, July 25 at 9pm eastern (-4UT)
(Brian Kloppenborg will be available for this chat.)
Beginner Chat #2: CCD Observing
Tuesday, July 26 at 7pm eastern (-4UT)
Beginner Chat #3: Science of variables
Wednesday, July 27 at 3pm eastern (-4UT)
About a month ago I wrote a post discussing what I'm doing with some astrometric data from the Sproul Observatory. This week I'm happy to report I have the paper almost entirely written and am working out the last few kinks in the analysis. It's been a serious uphill battle in both learning about astrometry and reducing the data, but I think it's been worth it.
In this post I'm going to talk a little more about the data and how it is reduced. In the prior post I mentioned that the data was taken on photographic plates starting in 1938 and ending in the early 1980s. I only have a small subset of the entire set from Sproul (about 40% actually) which is enough to show the effect I was looking for, but not much more.Read more
Photometric observer Richard Miles reported a V band magnitude of 3.02 for epsilon Aurigae this past week, which essentially matches the pre-eclipse average and signals the end of optical eclipse (4th contact). The long march through eclipse is over. However, we still need your observations for at least the balance of this year in order to more precisely define 4th contact after-the-fact, and to characterize the magnitude of out of eclipse variations (~0.1 mag in V). Information on the latter will be helpful in comparison with planned post-eclipse observations with both the CHARA Array MIRC imager (with exciting new 6 telescope mode) and the IRTF SpeX infrared instrument.
What do we learn from the fine light curves now collected?
Step one: timing of events in the light curves.
Step two: analysis of "fine structure" present in the light curves.
Step one: Read more