- Proceedings News
Susan reports that the WET/DARC proceedings '07 is in
the fine tuning stage. Please take a moment to look over your document and make sure that everything
is okay. For some, Susan added captions to tables, resized figures, edited references, shortened
the running title, or changed a few grammatical errors. Please check over your document and make
sure it looks okay. If you have any questions, contact Susan at
sthomp@udel.edu. The current version of the document at
here.
- April 2008 XCOV 26
XCOV26 is winding down. The run has a much longer timebase that a "traditional" WET run.
In fact, LNA in Brazil finished May 1, and Konkoly has acquired some additional time and will continue to observe
PG1159+035. We did have some trouble with clouds in Europe and Hawaii, but our observers were tenacious and we demonstrated the
importance of multiple telescopes at the same longitude. Our preliminary estimate (we are still waiting for a bit more data to come in) is over 260 hours of observations on EC14012, over 270 hours on PG1159, and over 160 hours on R808. This is the first run I can remember where we got such good coverage on three targets.
For EC14012 , we have a preliminary identification of 7 main
frequencies, and a vast amount of combination frequencies.
Each mode is dominated by a single component. We have only begun to look at the overall multiplet structure.
Mike has done a preliminary linear fit of the main frequencies, and this can be found on the
webpage.
We also have a good selection of beautiful high signal to noise lightcurves from SOAR and SALT, so Mike is very confident
that he will be able to derive information about EC14012's convection zone.
For PG1159, we have preliminary linear fits to the main frequencies
(webpage).
We are in the process of getting the data to Kepler so he can begin his analysis. We also have SALT data on this star, which could prove to be very interesting:)
For R808, a star that was just supposed to be a target to fill in a few hours here and there turned out to get quite a bit
of coverage. R808's FT looks an awful lot like the FT
of G38-29, the Nov 2007 target star.
Both of these stars have complicated regions of power around 1000 microHz. We are not sure if either of these stars are
good candidates for Mike's convection/light curve fitting techniques, but they are interesting in their own rights.
We are working on asteroseimology fits to both of these stars.
I want to say thank you again to everyone for their efforts, both at the telescope and at Headquarters. This run was an
enormous success, and it could not have happened without the support of everyone in the network. I can't thank everyone
personally in this email, but here are just a few examples during the run that spring to my mind....Jiang at BAO, who had to
manually press the "start" button for each exposure on his first night (he had 1224 object exposures that night). Barbara at
McDonald who went to the dome despite wind gusts of 80 mph. Aleksandr at Peak Terskol who braved 3-4m of snow to get to his dome,
Denis at Mt. John who went to great efforts to get his instrument working, Atsuko at the 88inch in Hawaii who never gave up
despite the fog, Willie at PJMO who observed R808 so diligently, Staszek at Mt. Suhora who had a few heartbreaking clear days
that clouded over by nightfall, all of our observers everywhere who patiently waited for the clouds/rain to clear to get even
a few hours of observations:) We are planning on presenting preliminary results in Barcelona, so I'm hoping to see
everyone there:)
- November Run News
Our November run on G38-29 was a great success. We obtained
over 225 hours of observations from ~40 runs. Europe had some trouble with snow during the run, but Mt. Suhora
cleared on Nov 20 and obtained
an additional three nights of observations. The preliminary FT and the light curve is on the web site at
November 2007 G38-29 Run. We are just starting to digest this FT (there are over 30 frequencies present), and it is clear
that this is not a star that could be done well from a single site. So we are looking forward to asteroseismology and convective light curve
fitting of G38-29. Susan presented a poster on the preliminary FT, light curves, and frequencies at the January 2008 AAS meeting in Austin TX. If you would like a copy, please contact Susan at sthomp@udel.edu
- GD358 News
Analysis of GD358 is continuing. The paper is now in the hands of Mike Montgomery, and we will
be working on it this week.
|