伽玛暴(Gamma-Ray Burst)笔记。记录有关伽玛暴的新文章,另外也包括看的老文章、自己的想法、以及跟天文相关的一些东西。 Feel free to leave me a message by comments or by email.

星期二, 十月 31, 2006

Liang2006 XRF060218的时间特性和谱时延

主要内容:


精彩摘抄:

Spectrum, with thermal component (Dotted line).

文章信息:

astro-ph/0610956 [abs, ps, pdf, other] :
Title: Temporal Profiles and Spectral Lags of XRF 060218
Authors: En-Wei Liang, Bin-Bin Zhang, Mike Stamatikos, Bing Zhang, Jay Norris, Neil Gehrels, Jin Zhang, Z. G. Dai
Comments: 9 pages in emulateapj format, including 4 figures and 1 table, accepted for publication in ApJ Letters

The spectral and temporal properties of the non-thermal emission ofthe nearby XRF 060218 in 0.3-150 keV band are studied. We show that both the spectral energy distribution and the light curve properties suggest the same origin of the non-thermal emission detected by {\em Swift} BAT and XRT. This event has the longest pulse duration and spectral lag observed to date among the known GRBs. The pulse structure and its energy dependence are analogous to typical GRBs. By extrapolating the observed spectral lag to the {\em CGRO/BATSE} bands we find that the hypothesis that this event complies with the same luminosity-lag relation with bright GRBs cannot be ruled out at $2\sigma$ significance level. These intriguing facts, along with its compliance with the Amati-relation, indicate that XRF 060218 shares the similar radiation physics as typical GRBs.

星期一, 十月 30, 2006

Starling2006 从余辉探测星系和尘埃吸收

主要内容:


精彩摘抄:


文章信息:
astro-ph/0610899 [abs, ps, pdf, other] :
Title: Gamma-Ray Burst afterglows as probes of environment and blastwave physics I: absorption by host galaxy gas and dustAuthors: R. L. C. Starling (1,2), R. A. M. J. Wijers (1), K. Wiersema (1), E. Rol (2), P. A. Curran (1), C. Kouveliotou (3), A. J. van der Horst (1), M. H. M. Heemskerk (1) ((1) Amsterdam, (2) Leicester, (3) NASA/MSFC)Comments: 24 pages, 5 figures, submitted to ApJ
We use a new approach to obtain limits on the absorbing columns towards an initial sample of 10 long Gamma-Ray Bursts observed with BeppoSAX and selected on the basis of their good optical and nIR coverage, from simultaneous fits to nIR, optical and X-ray afterglow data, in count space and including the effects of metallicity. In no cases is a MW-like extinction preferred, when testing MW, LMC and SMC extinction laws. The 2175A bump would in principle be detectable in all these afterglows, but is not present in the data. An SMC-like gas-to-dust ratio or lower value can be ruled out for 4 of the hosts analysed here (assuming SMC metallicity and extinction law) whilst the remainder of the sample have too large an error to discriminate. We provide a more accurate estimate of the line-of-sight extinction and improve upon the uncertainties for the majority of the extinction measurements made in previous studies of this sample. We discuss this method to determine extinction values in comparison with the most commonly employed existing methods.

Dwarkadas2006 伽玛暴的星风-review

主要内容:


精彩摘抄:


文章信息:
astro-ph/0610868 [abs, ps, pdf, other] :
Title: Winds From Massive Stars, And Implications for Supernovae and Gamma-Ray BurstsAuthors: Vikram V. Dwarkadas
Comments: 6 pages, 1 figure. To be published by AIP press, in proceedings of the conference, "The Multicoloured Landscape of Compact Objects and their Explosive Origins", held in Cefalu, Sicily (Italy), June 11 - 24, 2006
We review the effects of winds from massive O and B stars on the surrounding medium over the various stages of stellar evolution. Furthermore we discuss some of the implications for SNe and GRB evolution within this wind-blown medium.

Toma2006 GRB060218中心为磁星的模型

主要内容:


精彩摘抄:


文章信息:
astro-ph/0610867 [abs, ps, pdf, other] :
Title: Low-Luminosity GRB 060218: A Collapsar Jet from a Neutron Star, Leaving a Magnetar as a Remnant?Authors: Kenji Toma, Kunihito Ioka, Takanori Sakamoto, Takashi NakamuraComments: 12 pages, 3 figures; submitted to the Astrophysical Journal
The gamma-ray burst (GRB) 060218 has ~10^5 times lower luminosity than typical long GRBs, and is associated with a supernova (SN). The radio afterglow displays no jet break, so that this burst might arise from a mildly-relativistic spherical outflow produced by the SN shock sweeping the stellar surface. Since this model is energetically difficult, we propose that the radio afterglow is produced by a non-relativistic phase of an initially collimated outflow (jet). Our jet model is supported by the detection of optical linear polarization in the SN component. We also show analytically that the jet can penetrate a progenitor star. Furthermore, we analyzed the observational data of the prompt emission of this burst and obtained the implications that it may last longer than 10^6 s, which prefers a neutron star engine to a black hole engine. The collimation-corrected event rate of such low-luminosity GRBs is ~10 times higher than that of typical long GRBs, and they might form a different GRB population: low-luminosity GRBs are produced by mildly-relativistic jets from neutron stars at the collapses of massive stars, while typical long GRBs by highly-relativistic jets from black holes. We suggest that the central engine of GRB 060218 is a pulsar (or a magnetar) with the initial rotation period P_0 ~10 ms and the magnetic field B ~10^{16} G. A giant flare from the magnetar might be observed in future.

Capalbi2006 GRB050408的X射线余辉

主要内容:


精彩摘抄:


文章信息:
astro-ph/0610845 [abs, ps, pdf, other] :
Title: Long-term monitoring of the X-ray afterglow of GRB 050408 with Swift/XRTAuthors: M. Capalbi, D. Malesani, M. Perri, P. Giommi, S. Covino, G. Cusumano, V. Mangano, T. Mineo, S. Campana, G. Chincarini, V. La Parola, A. Moretti, P. Romano, G. Tagliaferri, L. Angelini, P. Boyd, D.N. Burrows, O. Godet, J.E. Hill, J.A. Kennea, F. Marshall, P.T. O'Brien, N. GehrelsComments: Accepted for publication in A&A; 7 pages, 3 figures
We present observations of the X-ray afterglow of GRB 050408, a gamma-ray burst discovered by HETE-II. Swift began observing the field 42 min after the burst, performing follow-up over a period of 38 d (thus spanning three decades in time).The X-ray light curve showed a steepening with time, similar to many other afterglows. However, the steepening was unusually smooth, over the duration of the XRT observation, with no clear break time. The early decay was too flat to be described in terms of standard models. We therefore explore alternative explanations, such as the presence of a structured afterglow or of long-lasting energy injection into the fireball from the central GRB engine. The lack of a sharp break puts constraints on these two models. In the former case, it may indicate that the angular energy profile of the jet was not a simple power law, while in the second model it implies that injection did not stop abruptly. The late decay may be due either to a standard afterglow (that is, with no energy injection), or to a jetted outflow still being refreshed. A significant amount of absorption was present in the X-ray spectrum, corresponding to a rest-frame Hydrogen column density NH = 1.2 (-0.3,+0.4)*10^22 cm^-2, indicative of a dense environment.

伽玛暴文献阅读笔记从现在简化

“没时间”啊:(
好像是真的没时间,好多事都压下来了。
当然也跟没有适应有关,导致事稍微多一点就混了头, 结果做出来的事更少!
不过先从看GRB文献入手,砍掉看文献的时间。其实我还是比较喜欢看文献的,因为看astro-ph有一种新鲜感,会有一点点兴奋。
再加上现在GFW又莫名其妙地封了blogspot,使我不能看我写的blog。

现在准备看到的文献只翻译一个标题,归一下分类。如果确实感兴趣,就仔细看一下全文,再记下来。

星期四, 十月 26, 2006

Herman2006 GRB的哈勃图 2

主要内容:
在哈勃图上显示宇宙确实有一个从减速到加速的过程,但于Ia型超新星认为的在z~0。5-1不同,转换的地点在2。5-3。5。

精彩摘抄:


文章信息:

astro-ph/0610796 [abs, ps, pdf, other] :
Title: Hubble diagram of gamma-ray bursts: Robust evidence for a Chaplygin gas expansion-driven universe with phase transition at $z \simeq 3$
Authors: Herman J. Mosquera Cuesta, Habib Dumet M., Rodrigo Turcati, Carlos A. Bonilla Quintero, Cristina Furlanetto, Jefferson Morais

Kalemci2006 GRB041219a的偏振观测 2

主要内容:
用integral的SPI对该暴本身作了偏振的观测的处理,得到偏振度达到98 ± 33%(+33%是怎么得到的?). 不过也说可能存在系统误差,也就是对这个结果信心不足。

精彩摘抄:


文章信息:

astro-ph/0610771 [abs, ps, pdf, other] :
Title: Search for polarization from the prompt gamma-ray emission of GRB 041219a with SPI on INTEGRAL
Authors: E. Kalemci, S. E. Boggs, C. Kouveliotou, M. Finger, M. G. Baring
Comments: 8 pages, 11 figures, accepted to be published in ApJS

Beloborodov 2006 正反激波的动力学 3

主要内容:
以能动张量为出发点, 推导了RFS-NRS情形的正反激波。

精彩摘抄:


文章信息:
Mechanical Model for Relativistic Blast Waves Andrei M. Beloborodov 1 and Zuhngwhi Lucas Uhm
The Astrophysical Journal, 651:L1-L4, 2006 November 1

Gehrels2006 GRB060614的观测 3

主要内容:
给出了GRB060614的观测。此暴duration长,104s;但没有超新星成分,spectral time lag与短暴一样很短。意味着这是一类新的暴。

精彩摘抄:
暴的光变。(看起来和短暴GRB050724很像啊,前面一个大的,后面跟一些XRFs)

spectral time lag, 这个暴和短暴在一块儿。

文章信息:

astro-ph/0610635 [abs, pdf] :
Title: Swift detects a remarkable gamma-ray burst, GRB 060614, that introduces a new classification scheme
Authors: N. Gehrels, et al
Comments: 13 pages, 2 figures, accepted in Nature

Vol 444,1044| 21/28 December 2006| doi:10.1038/nature05376

Salmonson2006 SGR1806-20的射电遗迹的数值模拟 2

主要内容:
通过数值模拟,程序:Cosmos++,一个中等相对论性的喷流(0.5-0.7c)可以对观测作比较好的拟合。不过认为喷流可能是非均匀的。

此软伽玛重复暴的光变有一个突起。

精彩摘抄:
射电余辉光变。

文章信息:

astro-ph/0610706 [abs, ps, pdf, other] :
Title: Numerical Modeling of the Radio Nebula from the 2004 December 27 Giant Flare of SGR 1806-20
Authors: Jay D. Salmonson (LLNL), P. Chris Fragile (College of Charleston), Peter Anninos (LLNL)
Comments: Accepted to ApJ. 36 pages, 19 color figs. Please see this http URL for movies of simulations

Lazzati2006 X射线耀发的中心能源活动 3

主要内容:
从时标上认为外激波至少对一部分XRFs不成立。鉴于有一些XRFs的时标非常短,认为他们就是耀发在辐射前很短时间从中心能源喷出的内激波。这样意味着引起XRFs的中心能源可能活动长达1天。

精彩摘抄:


文章信息:

astro-ph/0610730 [abs, ps, pdf, other] :
Title: X-ray flares and the duration of engine activity in gamma-ray bursts
Authors: Davide Lazzati, Rosalba Perna (JILA, University of Colorado)
Comments: 5 pages, submitted to MNRAS pink pages

星期五, 十月 20, 2006

Rottgering2006 低频射电望远镜LOFAR 2

主要内容:
将来用于观测低频的射电望远镜, 15 to 240 MHz。 由北欧建造。

其科学目标之一是巡天观测射电暂现源, 可能就和伽玛暴成协。 极限流量可以达到1mJy, 甚至更少。

精彩摘抄:

LOFAR的频率范围, 以及在这个范围的极限观测流量(虚线)。
分别是低频和高频的仪器。

文章信息:

astro-ph/0610596 [abs, ps, pdf, other] :
Title: LOFAR - Opening up a new window on the Universe
Authors: H.J.A. Rottgering, R. Braun, P. D. Barthel, M. P. van Haarlem, G. K. Miley, R. Morganti, I. Snellen
Comments: 10 pages, 5 figures, to appear in the proceedings of the conference "Cosmology, galaxy formation and astroparticle physics on the pathway to the SKA", Oxford, April 10-12 2006

Scargle 2006 用伽玛暴限定量子引力模型 3

主要内容:
总结了一下伽玛暴限定量子引力模型, 还是Norris他们。 认为短暴和能量高的比较容易做, 所以GLAST的观测可能更有用。

精彩摘抄:


文章信息:

astro-ph/0610571 [abs, pdf] :
Title: On the Problem of Detecting Quantum-Gravity Based Photon Dispersion in Gamma-Ray Bursts
Authors: Jeffrey D. Scargle, Jay P. Norris, Jerry T. Bonnell
Comments: 63 pages, 19 figures, to be submitted to the Astrophysical Journal

Cusumano 2006 Swift对GRB050904的观测 3

主要内容:
给出了Swift对GRB 050904的所有观测数据。 认为此暴的X射线和伽玛射线都是诞生于宇宙早期的超长暴的不同部分(和我们文章的观点一样哦)。(这篇文章只是比Nature上他们的文章内容更全了。)

精彩摘抄:

GRB050904的X射线辐射的Swift观测。
几个高红移暴的X射线辐射。

文章信息:

astro-ph/0610570 [abs, ps, pdf, other] :
Title: Swift observations of GRB050904: the most distant cosmic explosion ever observed
Authors: G. Cusumano, et al
Comments: 9 pages, 2 table, 6 figures, accepted for publication on A&A

GCN的 Reports Archive 3

不知道GCN什么时候做的, 反正现在才注意到, 网址是http://gcn.gsfc.nasa.gov/report_archive.html
是就某一个暴整理出当时的原始观测结果, 以pdf文件放出, 方便对单个暴的实时了解.

下面就是10月20号对GRB061019(即19号的暴)的总结, 应该是一直处于更新中.

星期二, 十月 17, 2006

Guetta 2006 Swift暴的X射线耀发 2

主要内容:
分析了一些耀发(X-ray falres), 认为refreshed 外激波比晚期内激波更可能。 refreshed的外激波是指形成余辉的外激波之后, 外激波物质被中心晚期喷流撞上, 晚期内激波是指晚期再一个跟伽玛暴类似的内激波。

精彩摘抄:


文章信息:

astro-ph/0610512 [abs, ps, pdf, other] :
Title: Analysis of X-ray flares in GRBs
Authors: D. Guetta, V. D'Elia, F. Fiore, M.L. Conciatore, A. Antonelli, L. Stella
Comments: 9 pages, 3 figures. Invited talk at the Swift-Venice 2006 meeting to be published by "Il Nuovo Cimento"

King 2006 中子星-白矮星并合模型 2

主要内容:
题出了一种新模型: 中子星白矮星并合。 这种类型的暴可以在任何形态星系形成, 可以指示恒星诞生率。

精彩摘抄:


文章信息:

astro-ph/0610452 [abs, ps, pdf, other] :
Title: A new type of long gamma--ray burst
Authors: Andrew King, Emma Olsson, Melvyn B. Davies
Comments: MNRAS, in press

Yüksel2006 伽玛暴和中微子背景辐射的关系 2

主要内容:
伽玛暴和中微子背景辐射的关系以及与UHECR的关系。

精彩摘抄:
observations have revealed that GRBs generally originate from metal-poor galaxies and do not directly trace cosmic star formation,

the mean redshift of the Swift GRB sample, ∼ 3.


文章信息:

astro-ph/0610481 [abs, ps, pdf, other] :
Title: Implications of a GRB-Metallicity Anti-Correlation for Cosmogenic Neutrinos
Authors: Hasan Yuksel, Matthew D. Kistler (Ohio State University)
Comments: 8 pages, 5 figures

Levinson2006 中微子主导的喷流 2

主要内容:
给出了中微子主导喷流的GRMHD模型, 认为极端相对论性的喷流是可能的, 而且伽玛暴的能量也是可以达到的。

精彩摘抄:


文章信息:

astro-ph/0610447 [abs, ps, pdf, other] :
Title: Neutrino-Driven Mass Loading of GRMHD Outflows
Authors: Amir Levinson
Comments: 6 pages, 2 figures

in the Forward Relativistic Jets of AGNs and GRBs Zhou 2006 洛仑兹Deboosting的重要性 0

主要内容:
伽玛暴中可能可以用Deboosting解释X射线快速的部分。

精彩摘抄:


文章信息:

astro-ph/0610444 [abs, ps, pdf, other] :
Title: Doppler Boosting and Deboosting Effects in the Forward Relativistic Jets of AGNs and GRBs
Authors: Jianfeng Zhou, Yan Su
Journal-ref: "Black Holes: from Stars to Galaxies across the Range of Masses" Proceedings IAU Symposium No. 238, 2006

星期日, 十月 15, 2006

Eldridge 2006 GRB 060218的光学观测和宿主星系 1

主要内容:
给出了GRB 060218的光学和宿主星系的观测.

精彩摘抄:


文章信息:

astro-ph/0610413 [abs, ps, pdf, other] :
Title: The circumstellar environment of rotating Wolf-Rayet Stars and the implications for GRB afterglows
Authors: J.J. Eldridge
Comments: 2 pages, 1 figure. To appear in the proceedings of the RS GRB discussion meeting

Eldridge 2006 WR星旋转对周围环境的影响 3

主要内容:
如果WR是长暴的前身星, 就一定有旋转, 旋转可能用于解释为什么这么多暴周环境是均匀介质!

精彩摘抄:


文章信息:

astro-ph/0610408 [abs, ps, pdf, other] :
Title: Short GRBs: Rates and luminosity function implications
Authors: Dafne Guetta
Comments: 6 pages, 2figures. Submitted to the proceedings of the Swift-Venice 2006 meeting to be published by "Il Nuovo Cimento"

Guetta 2006 短暴诞生率 2

主要内容:
通过BATSE数据得到的短暴诞生率比以前估计的高, 和脉冲双星(binary pulsars是两个都是脉冲星, 还是其中一个是?)的并合率相当. 为 \sim 8 to \sim 30h_(70)^3 Gpc^(-3)yr^(-1).

精彩摘抄:


文章信息:

astro-ph/0610408 [abs, ps, pdf, other] :
Title: Short GRBs: Rates and luminosity function implications
Authors: Dafne Guetta
Comments: 6 pages, 2figures. Submitted to the proceedings of the Swift-Venice 2006 meeting to be published by "Il Nuovo Cimento"

Granot 2006 伽玛暴的喷流 3

主要内容:
对伽玛暴相对论喷流的结构和动力学做了综述. 有关喷流的基本都在这篇文章上了.

精彩摘抄:


文章信息:

astro-ph/0610379 [abs, ps, pdf, other] :
Title: The Structure and Dynamics of GRB Jets
Authors: Jonathan Granot (KIPAC, Stanford)
Comments: 27 pages, 26 figures; invited review for the proceedings of the conference "Triggering Relativistic Jets", held in Cozumel, Mexico, on March 28 to April 1, 2005; accepted for publication in Rev. Mex. A&A

星期六, 十月 14, 2006

ApJ要换主编了

Robert C. Kennicutt, Jr.(1998-2006)换为Prof. Ethan T. Vishniac。 他曾经是ApJ的科学编辑。

The Astrophysical Journal, 650:i-, 2006 October 10

de Ugarte Postigo2006 高红移的短暴060121 2

主要内容:
给出了高红移的短暴(也可能是中等持续时间的暴)GRB060121的观测, 红移为4.6或者1.7。 这么远还能看到, 说明暴本身能量很高, 与一般的短暴不一样。 这也是定出红移的短暴中最远的一个。

精彩摘抄:
在暴的硬度-时间图上的位置。

文章信息:

GRB 060121: Implications of a Short-/Intermediate-Duration γ-Ray Burst at High Redshift

A. de Ugarte et al
The Astrophysical Journal, 648:L83-L87, 2006 September 10


星期四, 十月 12, 2006

Gendre2005 XMM-Newton和Chandra对X射线余辉的观测 2

主要内容:
给出了16个它们观测的X射线余辉。 统计发现早期和晚期的观测对参数的限制不同; 张角修正后的能量并不集中;不同仪器所观测的暴的光变都相似。

精彩摘抄:


文章信息:

Title:
X-ray continuum properties of GRB afterglows observed by XMM-Newton and Chandra
Authors:
Gendre, B.; Corsi, A.; Piro, L.
Publication:
Astronomy and Astrophysics, Volume 455, Issue 3, September I 2006, pp.803-812;(arXiv:astro-ph/0507710)

Crowther WR星综述 3

主要内容:
Wolf-Rayet的综述。 25, 40, 75 Msun for hydrogen-depleted (He-burning) WN, WC, and H-rich (H-burning) WN stars。

精彩摘抄:


文章信息:

astro-ph/0610356 [abs, ps, pdf, other] :
Title: Physical Properties of Wolf-Rayet Stars
Authors: Paul A Crowther
Comments: 75 pages, 8 figures. Manuscript submitted to "Annual Review of Astronomy & Astrophysics", for publication in Volume 45 (2007). Version with full resolution figures is available from this ftp URL

星期三, 十月 11, 2006

De Pasquale 2006 BepposSAX暴的X射线余辉 3

主要内容:
给出了BeppoSAX观测的有X射线余辉的33个暴. 发现与现在主流不一致: 没有喷流拐折, 说明张角有个下限; 周围是致密的ISM, 而不是wind; 有些暗暴是本征的.

精彩摘抄:
部分X射线余辉光变.

文章信息:

The BeppoSAX catalog of GRB X-ray afterglow observations

Authors: M. De Pasquale (1), L. Piro (1), B. Gendre (1), L. Amati (2), L.A. Antonelli (3), E. Costa (1), M. Feroci (1), F. Frontera (4), L. Nicastro (6), P. Soffitta (1), J. in't Zand
Comments: 24 pages, 12 figures.
arXiv:astro-ph/0507708; Astronomy and Astrophysics, Volume 455, Issue 3, September I 2006, pp.813-824

星期二, 十月 10, 2006

Levan2006 GRB030115的光学余辉和宿主星系的观测 2

主要内容:
光学余辉非常弱, 如果不知观测的早和极限星等大, 可能被定义为暗暴. 宿主星系很红.

精彩摘抄:
红外余辉.

文章信息:

Infrared and Optical Observations of GRB 030115 and its Extremely Red Host Galaxy: Implications for Dark Bursts
Andrew Levan
The Astrophysical Journal, 647:471-482, 2006 August 10

意大利的 AGILE 伽马射线卫星 2

AGILE是意大利的the Italian Space Agency (ASI)支持的. 能段 gamma-ray energy range (30 MeV - 30 GeV) and hard X-ray range (15 - 45 keV).
主页: http://agile.rm.iasf.cnr.it/index.html
科学目标:
The major scientific objects of study will be:

- Active Galactic Nuclei
- Gamma Ray Bursts
- Pulsars
- Unidentified Sources
- Supernova Remnants
- Binary System
- Gamma-ray Galactic Diffuse Emission
- TeV Sources
- Fundamental Physics

快要上天了, 用印度的火箭.

Chen2006 伽玛暴宿主星系的两类 2

主要内容:
通过伽玛暴宿主星系的尘埃的吸收曲线, 可以大致把宿主星系分为两类.

精彩摘抄:


文章信息:

Dust Extinction of Gamma-Ray Burst Host Galaxies: Identification of Two Classes?

S. L. Chen ,1 Aigen Li ,1,2 and D. M. Wei 1,3

The Astrophysical Journal, 647:L13-L16, 2006 August 10

Hirschi2006 前身星的模拟 0

主要内容:
模拟给出了低金属丰度的大质量恒星的演化。

精彩摘抄:


文章信息:

astro-ph/0610276 [abs, ps, pdf, other] :
Title: GRB progenitors at low metallicities
Authors: R. Hirschi, G. Meynet, A. Maeder
Comments: 5 pages, 1 figure, to appear in the proceedings of "Swift and GRBs: Unveiling the Relativistic Universe", San Servolo, Venice, 5-9 June 2006

Genet2006 电磁模型下的余辉计算 2

主要内容:
在Lyutikov and Blandford (2003)的伽玛暴电磁模型的基础上, 计算余辉.

精彩摘抄:


文章信息:

Title:
Afterglow calculation in the electromagnetic model for gamma-ray bursts
Authors:
Genet, F.; Daigne, F.; Mochkovitch, R.
Publication:
Astronomy and Astrophysics, Volume 457, Issue 3, October III 2006, pp.737-740

星期一, 十月 09, 2006

Deng2006 本地星系与伽玛暴的关系 1

主要内容:
对BATSE数据, 暴2度以内星系的统计, 发现它们的密度分布与暴并没有什么相关性. 说明暴不是来自于近处星系的.

精彩摘抄:


文章信息:

The correlation between the local density of galaxies and the presence of Gamma-Ray Bursts
Deng Xin-fa *, Chen Yi-qing 2, Jiang Peng 1, Song Jun 1, He Con-gen 1, He Ji-Zhoul 1
1School of Science, Nanchang University, Jiangxi, China, 330047
2Management College, Nanchang University, Jiangxi, China, 330047
Publication:
Astronomische Nachrichten, Vol.327, Issue 7, p.719 (AN Homepage)

Taylor2005 长暴的理论和观测 0

主要内容:
会议上的小综述, 没有新内容.

精彩摘抄:


文章信息:

Title:
Long gamma-ray bursts: (current) theory and observation
Authors:
Taylor, Paul A.
Publication:
In Proceedings of RAGtime 6/7: Workshops on black holes and neutron stars, Opava, 16-18/18-20 September, 2004/2005; S. Hledík and Z. Stuchlík, editors, Silesian University in Opava, Czech Republic, 12/2005, ISBN 80-7248-334-X, pp. 301-313

Ferrero2006 没有看到GRB050813的光学余辉 1

主要内容:
GRB050813是一个短暴(有比较多的X-ray flares), 对其光学余辉的观测确定没有超新星成分. 是一个"好的"短暴.

精彩摘抄:
把其他一些暴移动到此暴的红移处, 其光变比较.

文章信息:

astro-ph/0610255 [abs, ps, pdf, other] :
Title: Constraints on an optical afterglow and on supernova light following the short burst GRB 050813
Authors: P. Ferrero, et al
Comments: Submitted to AJ

Ghirlanda 2006 伽玛暴宇宙学 3





主要内容:
系统地讲了用伽玛暴的各种统计关系定宇宙学参数的过程和方法. 包括了很多统计关系.

精彩摘抄:
E_p-E_iso和E_p-L_iso

另一个关系, 更加致密, 不过多一个参数.

文章信息:

astro-ph/0610248 [abs, ps, pdf, other] :
Title: Gamma Ray Bursts as standard candles to constrain the cosmological parameters
Authors: G. Ghirlanda (1), G. Ghisellini (1), C. Firmani
Journal-ref: New Journal of Physics, 8 (2006) 123

Castro-Tirado2006 BOOTES-IR观测伽玛暴的红外余辉 1

主要内容:
BOOTES-IR是BOOTES的扩展, 后者观测光学, 前者企图观测伽玛暴的红外余辉.

精彩摘抄:


文章信息:

Title:
BOOTES-IR: a robotic nIR astronomical observatory devoted to follow-up of transient phenomena
Authors:
Castro-Tirado, A. J.;et al
Publication:
Ground-based and Airborne Telescopes. Edited by Stepp, Larry M.. Proceedings of the SPIE, Volume 6267, pp. (2006).

Krimm2006 Swift第一年的观测 1

主要内容:
大致总结了Swift在第一年里的主要观测, 包括非伽玛暴的.

精彩摘抄:


文章信息:

Title:
Swift: results from the first year of the mission
Authors:
Krimm, Hans A.
Publication:
Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray. Edited by Turner, Martin J. L.; Hasinger, Günther. Proceedings of the SPIE, Volume 6266, pp. (2006).

York 2006 准备在南极的光学巡天 3

主要内容:
准备在南极做光学巡天, 代号X, 找光学暂现源, 包括孤儿余辉, 超新星, 行星, AGN等. 其中预计每天观测0.3个伽玛暴余辉, >100个孤儿余辉!

精彩摘抄:

一些暂现源的诞生率(在一定极限星等上).
与其他巡天仪器的比较.

印象图.

文章信息:

Title:
A large array of telescopes in Antarctica with all-sky imaging every five seconds
Authors:
York, Donald G.; et al
Publication:
Ground-based and Airborne Telescopes. Edited by Stepp, Larry M.. Proceedings of the SPIE, Volume 6267, pp. (2006)

Toshio 2006 ISAS的红外望远镜 1

主要内容:
重新设计了at ISAS in Japan的红外望远镜, 使得可以自动观测.

精彩摘抄:


文章信息:

Title:
Automated 1.3m near-infrared telescope system triggered by gamma-ray burst
Authors:
Murakami, Toshio; Yonetoku, Daisuke; Kinoshita, Shin; Masui, Hiroki; Okuno, Shinya; Yoshinari, Satoru; Kidamura, Takashi; Tanabe, Sachiko; Yokota, Satoshi; Kobayashi, Yukiyasu; Nakagawa, Takao; Nakamura, Takashi
Publication:
Ground-based and Airborne Telescopes. Edited by Stepp, Larry M.. Proceedings of the SPIE, Volume 6267, pp. (2006). (SPIE Homepage)

星期日, 十月 08, 2006

Butler2006 GRB051111的全面观测 3

主要内容:
给出暴GRB051111的全方面的观测结果, 包括各波段光变, 谱.

精彩摘抄:

X和光学的光变.

t=100s时的谱, 很全面了.

光学光变

光学多波段光变
文章信息:
When Do Internal Shocks End and External Shocks Begin? Early-Time Broadband Modelling of GRB 051111

Authors: N. R. Butler, W. Li, D. Perley, K. Y. Huang, Y. Urata, J. X. Prochaska, J. S. Bloom, A. V. Filippenko, R. J. Foley, D. Kocevski, H.-W. Chen, Y. Qiu, P. H. Kuo, F. Y. Huang, W. H. Ip, T. Tamagawa, K. Onda, M. Tashiro, K. Makishima, S. Nishihara, Y. Sarugaku
Comments: 31 pages, 6 figures, Submitted to ApJ
astro-ph/0606763

Zhang 2006 Swift暴的辐射效率 3

主要内容:
详细研究了Swift暴, 包括X射线闪的辐射效率。 由于余辉中有一段变平使得估计的辐射效率偏低, 作者分别以减速时标和拐折时标估算了伽玛暴的辐射效率, 前者弥散较大, 并可达到90%以上, 后者都在10%以下.

精彩摘抄:

辐射效率和Hardness Ratio之间的统计. 黑色是t_b, 红色t_dec.


一些暴的数据和导出数据.

文章信息:

astro-ph/0610177 [abs, ps, pdf, other] :
Title: GRB Radiative Efficiencies Derived from the Swift Data: GRBs vs. XRFs, Long vs. Short
Authors: Bing Zhang, Enwei Liang, et al
Comments: 43 pages, 10 figures, ApJ, in press

Donaghy 2006

主要内容:
统计上有比较好E_peak \propto E_iso ^ {1/2}和E_p \propto E_gamma^\beta. 但是一般认为的偏轴观测并不能很好解释这一统计. 除非洛仑兹因子非常大, 或者\gamma和\Omega_j的反相关特别强.

(PDF文件太大, 30多兆)

精彩摘抄:
观测到的统计关系.

模拟结果, 蓝色是正轴, 绿色是偏轴, 红色是看不到的.

文章信息:

Title:
The Importance of Off-Jet Relativistic Kinematics in Gamma-Ray Burst Jet Models
Authors:
Donaghy, T. Q.
Publication:
The Astrophysical Journal, Volume 645, Issue 1, pp. 436-449.
arXiv:astro-ph/0512577

Nakamura 2006 相对论激波的自相似解 3

主要内容:
给出了相对论激波在power-law(指数只需小于4+n/2)的外部环境下的自相似解, 是BM76自相似解的扩充.

精彩摘抄:


文章信息:

Self-similar Solutions for the Interaction of Relativistic Ejecta with an Ambient Medium

Ko Nakamura and Toshikazu Shigeyama

The Astrophysical Journal, 645:431-435, 2006 July 1

Kann 2006 GRB050904的光学辐射 2

主要内容:
在光学波段也有flares。 给出了光学和红外的观测。

精彩摘抄:


文章信息:

Title:
The prompt optical/near-infrared flare of GRB 050904: the most luminous transient ever detected
Authors:
Kann, D. A.; Masetti, N.; Klose, S.
Publication:
eprint arXiv:astro-ph/0606567

Dessauges-Zavadsky 2006 伽玛暴附近的铁线 2

主要内容:
由于伽玛暴余辉对周围ISM影响, Fe+激发而导致的吸收线。 给出了GRB020813余辉的谱, 其中包含铁+的吸收线。

精彩摘抄:


文章信息:

Title:
Temporal Variation in the Abundance of Excited Fe+ Near a Gamma-Ray Burst Afterglow
Authors:
Dessauges-Zavadsky, Miroslava; Chen, Hsiao-Wen; Prochaska, Jason X.; Bloom, Joshua S.; Barth, Aaron J.
Publication:
The Astrophysical Journal, Volume 648, Issue 2, pp. L89-L92
arXiv:astro-ph/0606462

Lynden-Bell2006 盘旋盘的喷流 2

主要内容:
模拟了在磁场主导下, 当盘在盘旋时, 喷流的出射。

精彩摘抄:


文章信息:

Title:
Magnetic jets from swirling discs
Authors:
Lynden-Bell, D.
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 369, Issue 3, pp. 1167-1188
arXiv:astro-ph/0604424

Zheng 2006 GRB041219a光学辐射的康普顿模型 2

主要内容:
认为GRB041219A的早期光学辐射来自于伽玛射线被电子云康普顿散射的结果, 由于散射会使光学比暴本身的伽玛光子晚到, 也根据这个时间估算出该暴的红移约为0。073

精彩摘抄:


文章信息:

Title:
A Comptonization Model for the Prompt Optical and Infrared Emission of GRB 041219A
Authors:
Zheng, Zheng; Lu, Ye; Zhao, Yong-Heng
Publication:
The Astrophysical Journal, Volume 646, Issue 1, pp. L25-L28.
arXiv:astro-ph/0606312

Di Girolamo 2006 用伽玛暴定quintessence模型 1

主要内容:
以伽玛暴作为标准烛光, 定quintessence的模型。 1page。

精彩摘抄:


文章信息:

Testing quintessence models with GRBs

T Di Girolamo et al 2006
J. Phys.: Conf. Ser.
39 486

Di Girolamo 2006 羊八井对伽玛暴的观测 1


主要内容:
西藏羊八井ARGO-YBJ是一个GeV的高能探测器, 可以探测到单个高能粒子。 不过对伽玛暴的观测只有上限数据。

精彩摘抄:
对几个暴的观测的上限。

文章信息:

Searching for emission from gamma-ray bursts with the ARGO-YBJ detector

T Di Girolamo et al 2006
J. Phys.: Conf. Ser.
39 460-462

Rees2006 大尺度磁场的产生 2

主要内容:
讨论宇宙大尺度磁场的产生, 主要是指种子磁场的产生。 可能有原初恒星、AGN、GRB jet等。 文章还没涉及磁场的放大, 这也是另外一个棘手的问题。

精彩摘抄:
种子磁场产生的可能机制。

文章信息:

Origin of cosmic magnetic fields
M. J. Rees
Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
email: M. J. Rees (mjr36@cam.ac.uk)
Publication:
Astronomische Nachrichten, Vol.327, Issue 5/6, p.395 (AN Homepage)

Polcar2006 寻找BATSE暴和坍缩型超新星之间的关系 3

主要内容:
通过历史数据分析BATSE伽玛暴和超新星在时间和空间上的联系。 结果并不十分令人振奋。(no 全文)

精彩摘抄:


文章信息:

Title:
Search for correlations between BATSE gamma-ray bursts and supernovae
Authors:
Polcar, J.;
Publication:
Astronomy and Astrophysics, Volume 452, Issue 2, June III 2006, pp.439-449

Godet2006 GRB050421的早期观测 2

主要内容:
给出了GRB050421的早期X射线观测, 有两个flares, 认为是晚期内激波, 并认为早期X射线只有内激波的高纬辐射或者外激波贡献。 第一个swift观测的暗暴(naked burst)。
(无对应astro-ph)

精彩摘抄:


文章信息:

Title:
X-ray flares in the early Swift observations of the possible naked gamma-ray burst 050421
Authors:
Godet, O. et al
Publication:
Astronomy and Astrophysics, Volume 452, Issue 3, June IV 2006, pp.819-825

Surman 2006 喷流中的核合成 2

主要内容:
伽玛暴喷流中也可以发生核合成, 根据吸积率不同, 产物及丰度也不一样。 (高的10M_sun s^-1也是可能的)

精彩摘抄:


文章信息:

Nucleosynthesis in the Outflow from Gamma-Ray Burst Accretion Disks

R. Surman ,1 G. C. McLaughlin ,2 and W. R. Hix 3

The Astrophysical Journal, 643:1057-1064, 2006 June 1

星期五, 十月 06, 2006

Gu2006 伽玛暴的中微子主导吸积 3

主要内容:
提出伽玛暴中的吸积不能用牛顿近似, 而必须用广义相对论来做。 显示了中微子主导吸积流可以作为能源机制.

精彩摘抄:


文章信息:

Neutrino-dominated Accretion Models for Gamma-Ray Bursts: Effects of General Relativity and Neutrino Opacity

Wei-Min Gu , Tong Liu , and Ju-Fu Lu
The Astrophysical Journal, 643:L87-L90, 2006 June 1

Price 2006 双中子星并合产生超强磁场 3

主要内容:
数值模拟双中子星的并合, 可以产生超强的磁场, 达10^15高斯.

精彩摘抄:
磁场在并合过程中的演化过程, 毫秒量级, 非常快.

文章信息:
D. J. Price and S. Rosswog
Science 5 May 2006 312: 719-722

星期四, 十月 05, 2006

Produit2006 POLAR卫星 2

主要内容:
建造这个仪器的目的就是回答伽玛暴是否有偏振.

精彩摘抄:


文章信息:

Title:
POLAR, a compact detector for gamma-ray bursts photon polarization measurements
Authors:
Produit, N.; Barao, F.; Deluit, S.; Hajdas, W.; Leluc, C.; Pohl, M.; Rapin, D.; Vialle, J.-P.; Walter, R.; Wigger, C.
Publication:
Nuclear Instruments and Methods in Physics Research Section A, Volume 550, Issue 3, p. 616-625. (arXiv:astro-ph/0504605)
Publication Date:
09/2005

Bertone2006 银河系bulge中的正负电子湮灭线 2

主要内容:
认为bulge中的正电子来自于以前的伽玛暴, 并分析了诞生率, 发现是吻合的.

精彩摘抄:


文章信息:

Title:
Gamma-ray bursts and the origin of galactic positrons
Authors:
Bertone, G.; Kusenko, A.; Palomares-Ruiz, S.; Pascoli, S.; Semikoz, D.
Publication:
Physics Letters B, Volume 636, Issue 1 , 27 April 2006, Pages 20-24
Publication Date:
04/2006

Lewis2006 CMB的微引力透镜效应 3

主要内容:
CMB的微引力透镜效应包括: 改变CMB的功率谱, 导致非高斯性, 产生B模偏振. Physics Report综述文章. 65页.

精彩摘抄:


文章信息:
Weak gravitational lensing of the CMB
Antony Lewis, Anthony Challinor
Physics Reports 429 (2006) 1 – 65

Stratta2006 XRF 040912的观测 2

主要内容:
给出了XRF040912的观测. 没有光学余辉(>25星等), 没有超新星成份, z=1.56, 谱软.

精彩摘抄:


文章信息:

astro-ph/0610157 [abs, ps, pdf, other] :
Title: X-ray Flashes or soft Gamma-ray Bursts? The case of the likely distant XRF 040912
Authors: G. Stratta,et al
Comments: 10 pages, 7 figures, accepted for publication in Astronomy & Astrophysics

Schaefer 2006 大部分短暴并没有中等亮的宿主星系 3

主要内容:
虽然swift观测的短暴都能看到比较亮的宿主星系, 但是把以前的数据拿出来, 有大部分短暴, 比swift暴亮, 但并没有宿主星系.

这是作者总结出来的一个问题, 但并没有给出决定性的答案.

(comment: 可能是swift的选择效应, swift并不能真正看到"硬"的暴, 可能所观测到的是相对比较软的吧.)

精彩摘抄:
一些短暴的数据. swift之前的暴比较亮, 可是并没有宿主星系的观测.


文章信息:
The Astrophysical Journal, 642:L25-L28, 2006 May 1
Most Short-Hard Gamma-Ray Bursts Are Not in Moderately Bright Nearby Host Galaxies
Bradley E. Schaefer

Shibata2006 双中子星并合的模拟 3

主要内容:
三维模拟双中子星的并合. 根据不同的模型和状态方程看是否能产生短暴.

29页的PRD, 比较重量级.

精彩摘抄:

双中子星并合的其中一种情形.
并合之后的不同命运.

文章信息:

Title:
Merger of binary neutron stars to a black hole: Disk mass, short gamma-ray bursts, and quasinormal mode ringing
Authors:
Shibata, Masaru; Taniguchi, Keisuke
Publication:
Physical Review D, vol. 73, Issue 6, id. 064027 (PhRvD Homepage)
Publication Date:
03/2006

Bhattacharyya2006 中子星相变产生伽玛暴 2

主要内容:
考虑旋转的混合星(中子星含有夸克物质)的相变, 产生中微子湮灭从而产生伽玛暴.

精彩摘抄:


文章信息:

Title:
QCD phase transition in rotating neutron star, neutrino beaming and gamma-ray bursters
Authors:
Bhattacharyya, Abhijit; Ghosh, Sanjay K.; Raha, Sibaji
Publication:
Physics Letters B, Volume 635, Issue 4, p. 195-199. arXiv:astro-ph/0508372
Publication Date:
04/2006

Yamazaki2006 SGR1806-20 相对论性的喷流 2

主要内容:
说明SGR1806-20的幅射可以用极端相对论性的喷流解释, 与伽玛暴类似.

精彩摘抄:


文章信息:
Giant Flare of SGR 1806−20 from a Relativistic Jet
Author: Ryo Yamazaki1,2, Kunihito Ioka3, Fumio Takahara2, Noriaki Shibazaki4
Journal of Physics: Conference Series 31 (2006) 99–102

de Araujo 2006 引力波背景的(1+z)效应 1

主要内容:
反驳别人关于引力波随机背景中(1+z)这一项的影响. 并用伽玛暴做一估计.

精彩摘抄:


文章信息:

The star formation rate density and the stochastic background of gravitational waves

José C N de Araujo et al 2006 J. Phys.: Conf. Ser. 32

Berdermann2006 伽玛暴奇异星冷却模型 1

主要内容:
认为强磁场下的奇异星的冷却可以产生长暴或短暴. (模型还很粗糙.)

精彩摘抄:


文章信息:

Asymmetric neutrino propagation in newly born magnetized strange stars; GRB and kicks

J. Berdermanna, D. Blaschkeb, c, , , H. Grigoriana, d and D.N. Voskresenskyb, e
Progress in Particle and Nuclear Physics Volume 57, Issue 1 , July 2006, Pages 334-342 ; arXiv:astro-ph/0512655