Multiwave Length Observations of Gamma Ray Burst Afterglows

AST 98-03157 Shrinivas Kulkarni 伽马射线暴（GRB）在近三十年前被发现，但其起源仍然是个谜。 Kulkarni博士正在寻找这些物体的无线电和/或光学对应物。 他在编号为GRB 970508的GRB的光学余辉中探测到星系际云的红移吸收线。 他还测量了无线电余辉的大小，并显示了超光速（似乎比光速更快）膨胀。 在这项工作的基础上，他现在正在研究火球的物理学以及伽马射线暴宿主系统的性质。 他随时可以迅速利用世界各地的大型光学和射电望远镜，并正在利用这些望远镜跟踪BeppoSAX（意大利卫星）、XTE/ASM（美国航天局卫星）和HETE-2（美国航天局定于1999年秋季发射的卫星）报告的所有定位良好的爆发。 一旦爆发被定位，他进行光学成像观测，然后对潜在的候选者进行光谱学和无线电观测。 一旦确定了余辉候选者，他将进行宽带光学和红外观测，寻找无线电瞬变，源的光谱。 *** ***

AST 98-03157 Shrinivas Kulkarni Gamma Ray Bursts (GRBs) were discovered nearly three decades ago, but their origin remained mysterious. Dr. Kulkarni is searching to find radio and/or optical counterparts to these objects. He has detected red shifted absorption lines of intergalactic clouds in the optical afterglow of the GRB designated GRB 970508. He also measured the size of the radio afterglow and shown the superluminal (appears to move faster than the speed of light) expansion. Based on this work, he now is studying the physics of fireballs and also the nature of the host systems for GRBs. He has ready and rapid access to large optical and radio telescopes around the world, and is using these to follow up on all well localized bursts reported by BeppoSAX (Italian satellite), XTE/ASM (NASA satellite), and HETE-2 (NASA satellite due for launch in fall, 1999). Once a burst is localized, he conducts optical imaging observations followed by spectroscopy and radio observations of potential candidates. Once an afterglow candidate is identified, he is conducting broadband optical and infrared observations, searching for radio transients, spectroscopy of the source. *** ***