First Publication: CBET #1885!
On July 27, 2009 the IAU's Central Bureau of Astronomical Telegrams (CBAT) issued a Central Bureau Electronic Telegram (CBET) announcing our most recent observations. CBAT is located at the Harvard-Smithsonian Center for Astrophysics and is charged by the IAU to distribute important announcements and discoveries to the scientific community. The discoveries are usually time sensitive so can't wait for a formal paper to be written and published in a journal. CBAT has two publications they can use for stellar discoveries: the IAU Circular and the CBET. The latter is issued more frequently, so is used when timing is critical. Both are publications of record in the astronomical community.
Thus, CBET #1885 is the first publication of the Citizen Sky project! Congrats to Robin and all the observers who submitted data for the publication. It is important to let the rest of the community to know that the eclipse may have begun (in some wavelengths). Many astronomers are interested in this star so they now begin scheduling observations and paying closer attention to the star.
As activity commenses, we may submit other reports to CBAT. We can't guarantee they will publish them - CBAT is a referee'd publication. But we will send reports of important events that our participants detect. Also, when an event is reported, CBAT also likes to report latest observations of the star. I believe this is intended to help astronomers plan their observations. You can see an example of such a list at the bottom of this CBET. So don't be surprised if one of your regular observations makes it into the publication.
Electronic Telegram No. 1885
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
E. O. Waagen, AAVSO, writes that R. Leadbeater, Wigton, U.K., reported
(via the AAVSO Discussion Group) the spectroscopic detection of the start of
a predicted eclipse for the long-period binary star epsilon Aur. The last
eclipse was in 1982-1984. A redshifted component in the K I 769.9-nm line
has appeared in LHIRES III observations obtained on July 20.081 UT, offset by
+15 km/s and with 62-mA equivalent width. This emerging feature is uniquely
associated with eclipse phases, wherein visual light declines by 0.75 mag
over 18 months. Information on the international epsilon Aur eclipse
campaign may be found at website URL http://www.citizensky.org. Selected
visual magnitude estimates submitted to the AAVSO International Database:
Apr. 28.818 UT, 2.9 (M. Rzepka, Krosno, Poland); May 23.233, 2.9 (P. Abbott,
Leduc, Alberta, Canada); June 21.924, 2.9 (V. Makela, Helsinki, Finland);
July 3.078, 2.9 (S. Baroni, Milan, Italy); 22.035, 3.0 (P. Maurer, Bad
Friedichshall, Germany). H and J magnitudes submitted to the AAVSO
International Database: Apr. 24.022, J = 1.77 (B. McCandless, Elkton, MD,
U.S.A.); 24.043, H = 1.50 (McCandless); May 13.053, J = 1.83 (T. Rutherford,
Blountville, TN, U.S.A.); 13.065, H = 1.53 (McCandless); 30.06, J = 1.85,
H = 1.61 (Rutherford). BVRI magnitudes submitted to the AAVSO International
Database: Apr. 24.07, V = 2.92, R = 2.51 (McCandless); 24.078, B = 3.45
(G. Samolyk, Greenfield, WI, U.S.A.); May 13.055, R = 2.38 (McCandless);
July 3.961, V = 2.87, I_c = 2.21 (R. Miles, Stourton Caundle, Dorset,
England); 20.026, I_c = 2.33 (Miles); 20.044, V = 3.03 (Miles).
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2009 CBAT
2009 July 27 (CBET 1885) Daniel W. E. Green