Forwarded invitation to multiwavelength campaign from Ueda-san. Note: GRS 1915+105 is observable in infrared to radio due to the large extinction in optical wavelengths. From: ueda@astro.isas.ac.jp Date: Fri, 10 Mar 2000 21:04:50 +0900 GRS 1915+105 multiwavelength campaign in 2000 April Yoshihiro Ueda Institute of Space and Astronautical Science We are going to perform a big multiwavelentgh campaign of the microquaser (Galactic superluminal source) GRS 1915+105 from 2000 April 17.5 (UT) to April 25.5, with ASCA (X-ray), RXTE (X-ray), OSSE/CGRO (gamma-ray), and ground-based observations in radio and IR. We encourage whoever interested to make ground observations during this period. For details, please contact Yoshihiro Ueda (ueda@astro.isas.ac.jp).