کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1765260 | 1020092 | 2011 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Goddard Robotic Telescope - Optical follow-up of GRBs and coordinated observations of AGNs
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
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چکیده انگلیسی
Since it is not possible to predict when a Gamma-Ray Burst (GRB) will occur or when Active Galactic Nucleus (AGN) flaring activity starts, follow-up/monitoring ground telescopes must be located as uniformly as possible all over the world in order to collect data simultaneously with Fermi and Swift detections. However, there is a distinct gap in follow-up coverage of telescopes in the eastern U.S. region based on the operations of Swift. Motivated by this fact, we have constructed a 14â³ fully automated optical robotic telescope, Goddard Robotic Telescope (GRT), at the Goddard Geophysical and Astronomical Observatory. The aims of our robotic telescope are (1) to follow-up Swift/Fermi GRBs and (2) to perform the coordinated optical observations of Fermi Large Area Telescope (LAT) AGN. Our telescope system consists of off-the-shelf hardware. With the focal reducer, we are able to match the field of view of Swift narrow instruments (20â²Â à20â²). We started scientific observations in mid-November 2008 and GRT has been fully remotely operated since August 2009. The 3Ï upper limit in a 30 s exposure in the R filter is â¼15.4 mag; however, we can reach to â¼18 mag in a 600 s exposures. Due to the weather condition at the telescope site, our observing efficiency is 30-40% on average.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 47, Issue 8, 15 April 2011, Pages 1444-1450
Journal: Advances in Space Research - Volume 47, Issue 8, 15 April 2011, Pages 1444-1450
نویسندگان
T. Sakamoto, C.A. Wallace, D. Donato, N. Gehrels, T. Okajima, T.N. Ukwatta,