From owner-vsnet-alert@kusastro.kyoto-u.ac.jp Thu Jun 15 10:43 JST 2000 Date: Thu, 15 Jun 2000 10:32:44 +0900 (JST) From: Taichi Kato <tkato> To: vsnet-alert, vsnet-campaign X-Distribute: distribute [version 2.1 (Alpha) patchlevel=24] Subject: [vsnet-alert 4980] BL Lacertae campaign Content-Type: text Content-Length: 1212 Date: Wed, 14 Jun 2000 16:19:33 +0200 From: Massimo Villata <villata@to.astro.it> Subject: BL Lacertae campaign Dear WEBT (and other) observers, we are organizing an optical campaign on BL Lacertae contemporaneous with the high-energy campaign involving X-ray and TeV observatories such as BeppoSAX, RXTE, STACEE, CAT, HEGRA. Our purpose is to monitor BL Lac in the optical bands from one week before to one week after the high-energy campaign, that is from July 17 to August 11, with particularly dense coverage in the central period. We hope to get collaboration from observatories located at different longitudes, in order to obtain as continuos as possible light curves during all 24 hours of each day. In particular, our goal is high-density and high-precision coverage, possibly in two optical bands (B and R). Observers interested in participating to this optical campaign are invited to contact us replying to this message, and providing a few information on their instrumentation (telescope, detector, filters) and possible observing period. More detailed observing strategies will be discussed with the interested people. Thank you for your attention, Massimo Villata, Gino Tosti, Enrico Massaro