نتایج جستجو برای: break through curve

تعداد نتایج: 1500322  

2005
I. A. Smith R. P. J. Tilanus N. Tanvir R. A. M. J. Wijers P. Vreeswijk E. Rol C. Kouveliotou

We discuss our ongoing program of Target of Opportunity (ToO) sub-millimeter observations of gamma-ray bursts (GRBs) using the Sub-millimetre Common-User Bolometer Array (SCUBA) on the James Clerk Maxwell Telescope (JCMT). In this paper, we present all the ToO observations of GRB 030329. This was by far the brightest sub-millimeter afterglow seen to date. The flux density at 850 µm was approxim...

2006
David N. Burrows Dirk Grupe Milvia Capalbi Alin Panaitescu Sandeep K. Patel Chryssa Kouveliotou Bing Zhang Peter Mészáros Guido Chincarini Neil Gehrels Ralph A. M. Wijers

We report the best evidence to date of a jet break in a short gamma-ray burst (GRB) afterglow, using Chandra and Swift XRT observations of the X-ray afterglow of GRB 051221A. The combined X-ray light curve, which has three breaks, is similar to those commonly observed in Swift observations of long GRBs. A flat segment of the light curve at 0.1 days after the burst represents the first clear cas...

2007
G. Ghirlanda L. Nava G. Ghisellini C. Firmani

We test the spectral–energy correlation including the new bursts detected (mostly) by Swift with firm measurements of their redshifts and peak energy. The problem of identifying the jet breaks is discussed in the complex and multibreak/flaring X–ray light curves observed by Swift. We use the optical data as the most reliable source for the identification of the jet break, since the X–ray flux m...

2000
James E. Rhoads Andrew S. Fruchter

We present near-infrared observations of the proposed counterpart of GRB 000301c. The K’ filter (2.1μm) light curve shows a well-sampled break in the decay slope at t ≈ 3.5 days post-burst. The early time slope is very shallow (∼ −0.1), while the late time slope is steep (−2.2). Comparison with the optical (R band) light curve shows significant differences, especially in the early time decay sl...

2005
S. Vaughan M. R. Goad A. P. Beardmore P. T. O’Brien J. P. Osborne K. L. Page S. D. Barthelmy D. N. Burrows S. Campana J. K. Cannizzo M. Capalbi G. Chincarini J. R. Cummings G. Cusumano P. Giommi O. Godet J. E. Hill S. Kobayashi P. Kumar V. La Parola A. Levan V. Mangano P. Mészáros A. Moretti D. C. Morris J. A. Nousek C. Pagani D. M. Palmer J. L. Racusin P. Romano G. Tagliaferri B. Zhang N. Gehrels

This paper discusses Swift observations of the -ray burst GRB 050315 (z 1⁄4 1:949) from 80 s to 10 days after the onset of the burst. The X-ray light curve displayed a steep early decay (t ) for 200 s and several breaks. However, both the prompt hard X-ray/ -ray emission (observed by the BAT) and the first 300 s of X-ray emission (observed by the XRT) can be explained by exponential decays, wit...

Journal: :Lecture Notes in Computer Science 2023

We show that we can break SIDH in (classical) polynomial time, even with a random starting curve $$E_0$$ .

2004
Pedro N. Rodriguez Arnulfo Rodriguez

This paper examines the extent to which the daily movements of three large emerging markets stock indices are predictable. Lagged technical indicators are used as explanatory variables. In the analysis we employed seven classification techniques and assessed the discriminatory power of the classifiers through the area under the receiver operating characteristic (ROC) curve. The results show tha...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده علوم پایه 1391

تاقدیس پاسان درازای حدود 48 کیلومتر و پهنای حدود 7-5 کیلومتردارد و با روند شمال غرب- جنوب شرق در کمربند چین خورده- رانده زاگرس قرار دارد. در این تحقیق ما به تحلیل هندسی و جنبشی تاقدیس پاسان پرداخته و هندسه سطحی و زیرسطحی آن، سبک چین خوردگی و گسل خوردگی و ارتباط آنها با سطوح جدایش میانی را نشان داده ایم. در مطالعه این تاقدیس 3 پیمایش تقریباً عمود بر محور تاقدیس صورت گرفته است. بر اساس تحلیل های...

Journal: :CoRR 2013
Kun Jiang Xionghui Zhou Min Li Qiang Niu

Ruled surface is widely used in engineering design such as parting surface design of injection mold and checking surface design of checking fixture, which are usually generated by offsetting 3D curves. However, in 3D curve offset, there often exist break/interaction/overlapping problems which can't be solved by current CAD software automatically. This paper is targeted at developing a 3D curve ...

2003
D. M. Wei

GRB021211 was first detected by HETE II and its early afterglow has been observed. There is a break in its afterglow light curve at about 12 minutes after the bursts, before the break the optical flux decays with a power-law index of about −1.6, while at late time the power-law slope is about −1 (Chornock et al. 2002). Here we will show that the afterglow light curve of GRB021211 can be explain...

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