最新消息(02/23) NASA探测到近邻处的神秘爆炸

http://www.space.com/scienceastronomy/060223_explosion.html

...
The event, detected Feb. 18, looks something like a gamma-ray burst (GRB), scientists said. But it is much closer—about 440 million light-years away—than others. And it lasted about 33 minutes. Most GRBs are billions of light-years away and last less than a second or just a few seconds.
...

这一事件２月１８日被探测到，和伽马射线爆（GRB)非常类似。但它发生得比其它事件近得多，只有４亿４千万光年远。而且它持续了３３分钟。绝大部分GRB都发生在几十亿光年远，持续只有１秒或几秒钟.

关于这个RGB 060218 最新情况可以看
http://grad40.as.utexas.edu/grblog.php

最新跟踪观测表明似乎这是一个type-Ib/c超新星爆发

:roll:

:shock:

[quote:6bb707605b="benlinliu"][quote:6bb707605b="nngs"]http://www.space.com/scienceastronomy/060223_explosion.html

...
The event, detected Feb. 18, looks something like a gamma-ray burst (GRB), scientists said. But it is much closer—about 440 million light-years away—than others. And it lasted about 33 minutes. Most GRBs are billions of light-years away and last less than a second or just a few seconds.
...

这一事件２月１８日被探测到，和伽马射线爆（GRB)非常类似。但它发生得比其它事件近得多，只有４亿４千万光年远。而且它持续了３３分钟。绝大部分GRB都发生在几十亿光年远，持续只有１秒或几秒钟.

关于这个RGB 060218 最新情况可以看
http://grad40.as.utexas.edu/grblog.php

最新跟踪观测表明似乎这是一个type-Ib/c超新星爆发[/quote]

只有４亿４千万光年远

如何定出距离？[/quote]

"We have obtained optical spectroscopy of the GRB 060218 optical counterpart (Cusumano et al. GCN 4775) with the 6.0m BTA telescope of SAO-RAS in Zelenchuk, equipped with SCORPIO. First epoch spectroscopy in the 3500-7500 A range was obtained on Feb 20.65 UT, confirming z = 0.033 (Mirabal and Halpern GCN 4792)...."
http://grad40.as.utexas.edu/grblog.php?get=GCN4809