We report on the results of two coordinated multiwavelength campaigns that focused on the blazar Markarian 421 during its 2006 and 2008 outbursts. These campaigns obtained UV and X-ray data using the XMM-Newton satellite, while the gamma-ray data were obtained utilizing three imaging atmospheric Cerenkov telescopes, the Whipple 10 m telescope and

Based on MAGIC observations from 2007 June to July, we have obtained an integral upper limit to the VHE energy emission of the globular cluster M13 of F(E>200 GeV) 5.1 × 10-12 cm-2 s-1, and differential upper limits for E > 140 GeV. Those limits allow us to constrain the population of millisecond pulsars within M13 and to test models for

RXTE PCA Bulge scans detected activity of what appeared to be a known source. However, based on the results presented below, and the report of a new INTEGRAL source IGR J17511-305 (Baldovin et al. ATEL #2196), the activity detected by RXTE is due to a new 245 Hz X-ray pulsar. The source was initially detected on 2009-09-11 at 17:50 UT as a rising

We present rotationally resolved spectra of asteroid 490 Veritas in the near-infrared (NIR) that show interesting differences. Dynamical arguments indicate that 490 Veritas is the main fragment of a recent (8.3 My) asteroidal break-up. We obtained NIR spectra (0.8-2.4 microns) on UT May 11, 2008, using the SpeX instrument on NASA's Infrared

The table contains the relative radial velocity measurements of 30 Ari B with the 2-m Alfred-Jensch telescope at the Thueringer Landessternwarte Tautenburg. (1 data file).

Aims: Proper motion measurements of the cool and ultracool populations in the Upper Scorpius OB association are crucial to confirm membership and to identify possible run-away objects. Methods: We cross-match samples of photometrically selected and spectroscopically confirmed cool and ultracool (K5 SpT M8.5) candidate members in the Upper