کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1771406 | 1020761 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Very high energy gamma-ray observations of the Galactic Plane with the CANGAROO-III telescopes
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In 2004, we searched for very high energy (VHE) gamma-ray emission from the Galactic Plane using the CANGAROO-III stereoscopic observation system. Two different longitude regions (â = â19°.5 and â = +13°.0) on the Galactic Plane were observed during July and August 2004. We analyzed events that triggered three telescopes aiming to measure the diffuse emission component. No significant signal associated with the Galactic Plane was found from either of the regions. Assuming that the gamma-ray spectrum is described by a single power-law for energies ranging between a few GeV and TeV, lower limits of the power-law spectral indices were found to be 2.2 for both of the regions with a 99.9% confidence level. This result is consistent with the other VHE measurements and constrains a hypothesis in which a very hard (â¼2.0) cosmic ray electron spectrum was introduced to explain the EGRET GeV anomaly.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Astroparticle Physics - Volume 30, Issue 2, September 2008, Pages 47-53
Journal: Astroparticle Physics - Volume 30, Issue 2, September 2008, Pages 47-53
نویسندگان
M. Ohishi, M. Mori, Y. Adachi, A. Asahara, G.V. Bicknell, R.W. Clay, Y. Doi, P.G. Edwards, R. Enomoto, S. Gunji, S. Hara, T. Hara, T. Hattori, Sei. Hayashi, Y. Higashi, Y. Hirai, K. Inoue, C. Itoh, Y. Yukawa,