Observing run: Radio observations of Gamma-Ray Burst host galaxies with the Australian ATCA radio telescope

伽玛射线暴是宇宙中最明亮的电磁现象，可能与遥远星系中恒星质量黑洞的形成有关。一个基本的方法来了解更多的伽玛暴祖先人口的研究是他们的宿主星系。这里特别感兴趣的是无线电波段，因为它可能提供这些星系中恒星形成活动的不灭观点。最近，我的团队接受了澳大利亚ATCA射电望远镜阵列的观测建议，以观测几个这样的星系。总共65小时的望远镜时间被授予（PI：安娜玛丽亚Nicuesa Guelbenzu，Thueringer Landessternwarte陶滕堡）。观察定于2013年7月底进行（提案ID：C2840）。不幸的是，我的DFG项目Kl 766/16-1的预算中已经没有差旅费了，Ana Maria Nicuesa Guelbenzu在3.5年前被雇用。DFG Kl 766/16-1（“Fortsetzungsantrag”Kl 16-2）之后的新DFG提案仍在DFG进行评估。 在此，我请求为Ana Maria Nicuesa Guelbenzu和我自己提供旅行补助，以便执行这些预定的观察。这次运行的直接目标是测量少数GRB宿主星系在21厘米波段的通量，这将提供清晰的恒星形成率。因此，我们第一次专注于恒星形成的宿主星系的短爆发。 我们想知道这些星系的恒星形成率范围。应该提到的是，这些观测在南半球基本上不能击败任何其他团体，因为ATCA是最好的可用射电望远镜的南部目标。Ana Maria Nicuesa Guelbenzu关于使用美国VLA射电望远镜观测北方目标的类似建议也已被接受，并将在下学期以服务模式进行。

Gamma-Ray Bursts are the most luminous electromagnetic phenomena in the universe, possibly related to the formation of stellar mass black holes in remote galaxies. A fundamental approach to learn more about the GRB progenitor population is the study of their host galaxies. A particularinterest here is the radio band since it might provide an unextinguished view on the star-formation activity in these galaxies. Recently, my group got accepted an observing proposal for the ATCA radio telescope array, Australia, to observe several such galaxies. Altogether 65 hours telescope time were granted (PI: Ana Maria Nicuesa Guelbenzu, Thueringer Landessternwarte Tautenburg). Observations are scheduled for the end of July 2013 (proposal ID: C2840). Unfortunately, I have no travel money any more in the budget of my DFG project Kl 766/16-1, based on which Ana Maria Nicuesa Guelbenzu was hired 3.5 years ago. A new DFG proposal following DFG Kl 766/16-1 ("Fortsetzungsantrag" Kl 16-2) is still under evaluation at the DFG. Herewith, I am asking for a travel grant for Ana Maria Nicuesa Guelbenzu as well as myself in order to perform these scheduled obervations. The immediate goal of this run is to measure the flux of a handful of GRB host galaxies in the 21cm band, which will provide the unobscured star-formationrate. Thereby, we focus for the first time on star-forming host galaxies of short bursts. We want to learn what range in star-formation rates these galaxies do cover.It should be mentioned that these observations at the southern hemisphere can basically not be beated by any other group since ATCA is the best available radio telescope for southern targets. A similar proposal by Ana Maria Nicuesa Guelbenzu for northern targets using the american VLA radiotelescope has been accepted, too, and will be performed in service mode in the coming semester.