检索结果-南通市图书馆

Updating the orbital ephemeris of the dipping source XB 1254–690 and the distance to the source

Research in Astronomy and Astrophysics 2017年第10期17卷 97-108页

作者： Angelo F.Gambino Rosario Iaria Tiziana Di Salvo Marco Matranga Luciano Burderi Fabio Pintore Alessandro Riggio Andrea Sanna Universita degli Studi di Palermo Dipartimento di Fisica e Chimica Universita degli Studi di Cagliari Dipartimento di Fisica INAF-istituto di astrofisica spaziale e Fisica Cosmica - Milano

XB 1254-690 is a dipping low mass X-ray binary system hosting a neutron star and showing type I X-ray bursts. We aim at obtaining a more accurate orbital ephemeris and at constraining the orbital period derivative of the system for the first time. In addition, we want to better constrain the distance to the source in order to locate the system in a well defined evolutive scenario. We apply, for the first time, an orbital timing technique to XB 1254-690, using the arrival times of the dips present in the light curves that have been collected during 26 yr of X-ray pointed observations acquired from different space missions. We estimate the dip arrival times using a statistical method that weights the count-rate inside the dip with respect to the level of persistent emission outside the dip. We fit the obtained delays as a function of the orbital cycles both with a linear and a quadratic function. We infer the orbital ephemeris of XB 1254-690, improving the accuracy of the orbital period with respect to previous estimates. We infer a mass of M2 = 0.42 ± 0.04 M for the donor star, in agreement with estimations already present in literature, assuming that the star is in thermal equilibrium while it transfers part of its mass via the inner Lagrangian point, and assuming a neutron star mass of 1.4 Mo. Using these assumptions, we also constrain the distance to the source, finding a value of 7.6±0.8 kpc. Finally, we discuss the evolution of the system, suggesting that it is compatible with a conservative mass transfer driven by magnetic braking.

关键词： stars: neutron -- stars: individual (XB 1254-690) -- X-rays: binaries -- X-rays: stars --Astrometry and celestial mechanics: ephemerides

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Lamb-dip saturated-absorption cavity ring-down rovibrational molecular spectroscopy in the near-infrared

引用

Photonics Research 2022年第8期10卷 1803-1809页

作者： ROBERTO AIELLO VALENTINA DI SARNO MARIA GIULIA DELLI SANTI MAURIZIO DE ROSA IOLANDA RICCIARDI GIOVANNI GIUSFREDI PAOLO DE NATALE LUIGI SANTAMARIA PASQUALE MADDALONI Consiglio Nazionale delle Ricerche-istituto Nazionale di Ottica Via Campi Flegrei 3480078 PozzuoliItaly istituto Nazionale di Fisica Nucleare Sez.di NapoliComplesso Universitario di M.S.AngeloVia Cintia80126 NapoliItaly ppqSense S.r.l. Via Gattinella 2050013 Campi BisenzioItaly Consiglio Nazionale delle Ricerche-istituto Nazionale di Ottica Largo E.Fermi 650125 FirenzeItaly Agenzia spaziale Italiana Contrada Terlecchia75100 MateraItaly

The high-detection-sensitivity saturated-absorption cavity ring-down(SCAR)technique is extended to Lambdip spectroscopy of rovibrational molecular transitions in the near-infrared ***-comb-referenced sub-Doppler saturation measurements,performed on the acetylene(ν_(1)+ν_(3)+ν_(4)←ν_(4))R(14)e line at6562 cm^(-1),are analyzed by a SCAR global line profile fitting routine,based on a specially developed theoretical *** to a conventional cavity ring-down evaluation,our approach yields dip profiles with a linewidth freed from saturation broadening effects,reduced by 40%,and a signal-to-noise ratio increased by 90%.Ultimately,an overall(statistical and systematic)fractional uncertainty as low as 7×10^(-12)is achieved for the absolute line-center *** the same time,our method is also able to accurately infer the linear(nonsaturated)behavior of the gas absorption,providing Lamb-dip-based line strength measurements with a relative uncertainty of 0.5%.

关键词： saturated cavity absorption

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Imprints on CMB Angular Power Spectrum Modes from Cosmological Reionization

引用

Journal of Modern Physics 2012年第12期3卷 1918-1944页

作者： Tiziana Trombetti Carlo Burigana istituto di astrofisica spaziale e Fisica Cosmica di Bologna Bologna Italy

The accurate understanding of the ionization history of the Universe plays a fundamental role in modern cosmology. It includes a phase of cosmological reionization after the standard recombination epoch, possibly associated to the early stages of structure and star formation. While the simple “τ-parametrization” of the reionization process and, in particular, of its imprints on the Cosmic Microwave Background (CMB) anisotropy likely represents a sufficiently accurate modelling for the interpretation of current CMB data, a great attention has been recently posed on the accurate computation of the reionization signatures in the CMB for a large variety of astrophysical scenarios and physical processes. The amplitude and shape of the B-mode Angular Power Spectrum (APS) depends, in particular, on the tensortoscalar ratio, r, related to the energy scale of inflation, and on the reionization history, thus an accurate modeling of the reionization process will have implications for the precise determination of r or to set more precise constraints on it through the joint analysis of E and B-mode polarization data available in the next future and from a mission of next generation. In this work we review some classes of astrophysical and phenomenological reionization histories, beyond the simpleτ-parametrization, a present a careful characterization of the imprints introduced in all the CMB APS modes. We have implemented a modified version of CAMB, the Cosmological Boltzmann code for computing the CMB anisotropy APS, to introduce the predicted hydrogen and helium ionization fractions. We compared the results obtained for these models for all the non-vanishing (in the assumed scenarios) modes of the CMB APS. Considering also the limitation from potential residuals of astrophysical foregrounds, we discussed the capability of next data to disentangle between different reionization scenarios in a wide range of tensor-to-scalar ratios.

关键词： Cosmic Microwave Background Radiation: CMBR Polarization Reionization Gravitational Waves CMBR Polarization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Gmode Classification of Martian IR data

Gmode Classification of Martian IR data

引用

International Symposium on Computer Applications in Geoscience

作者： A.Coradini A.I.Gavrishin P.Cerroni O.Forni istituto di astrofisica spaziale del CNR-Italy Politechnical Institute of Novocherkassk-USSR istituto di astrofisica spaziale del CNR-Italy Institut d’ Astrophisique Spatial CNRS-France

＜正＞We will present here the result obtained applying a powerfull statistical method to IR spectra obtained by the spectrometer ISM during the Phobos mission to Mars. These data are typically multivariate:in fact for each mapped area,in each‘space pixel’a spectrum in 128 channels it is *** wavelength range is between 0.76 and

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Physics and astrophysics of strong magnetic field systems with eXTP

引用

Science China(Physics,Mechanics & Astronomy) 2019年第2期62卷 74-96页

作者： Andrea Santangelo Silvia Zane Hua Feng RenXin Xu Victor Doroshenko Enrico Bozzo Ilaria Caiazzo Francesco Coti Zelati Paolo Esposito Denis González-Caniulef Jeremy Heyl Daniela Huppenkothen Gianluca Israel ZhaoSheng Li Lin Lin Roberto Mignani Nanda Rea Mauro Orlandini Roberto Taverna Hao Tong Roberto Turolla Cristina Baglio Federico Bernardini Niccolo'Bucciantini Marco Feroci Felix Fürst Ersin G??ü? Can Güngör Long Ji FangJun Lu Antonios Manousakis Sandro Mereghetti Romana Mikusincova Biswajit Paul Chanda Prescod-Weinstein George Younes Andrea Tiengo YuPeng Xu Anna Watts Shu Zhang Shuang-Nan Zhang Institut für Astronomie und Astrophysik Eberhard Karls Universität Key Laboratory for Particle Astrophysics Institute of High Energy Physics Mullard Space Science Laboratory University College LondonHolmbury St Mary Department of Engineering Physics and Center for Astrophysics Tsinghua University School of Physics Peking University Department of Astronomy University of Geneva Department of Physics and Astronomy University of British Columbia Universitädell’Insubria Anton Pannekoek Institute for Astronomy University of Amsterdam INAF-Osservatorio Astronomico di Brera Center for Data Science New York University INAF-Osservatorio Astronomico di Roma Department of Physics Xiangtan University Department of Astronomy Beijing Normal University INAF-istituto di astrofisica spaziale e Fisica Cosmica Milano Janusz Gil Institute of Astronomy University of Zielona Góra Instituto de Ciencias del Espacio(ICE) CSIC-IEEC INAF-istituto di astrofisica spaziale e Fisica Cosmica Bologna Department of Physics and Astronomy University of Padova School of Physics and Electronic Engineering Guangzhou University NYU Abu Dhabi Saadiyat Campus P.O. NAF Osservatorio di Arcetri Largo Enrico Fermi 5 INAF-istituto di astrofisica e Planetologia Spaziali INFN-Roma Tor Vergata European Space Astronomy Centre(ESA/ESAC) Science Operations Department Sabanci University Faculty of Engineering and Natural Sciences Centrum Astronomiczne im.M.Kopernika Department of Physics Sultan Qaboos University Institute of Theoretical Physics Faculty of Mathematics and PhysicsCharles University in Prague Raman Research Institute Sadashivanagar Department of Astronomy University of Washington The George Washington University Physics department 725 21st St NW Scuola Universitaria Superiore IUSS Pavia Palazzo del Broletto

In this paper we present the science potential of the enhanced X-ray Timing and Polarimetry(eXTP) mission for studies of strongly magnetized objects. We will focus on the physics and astrophysics of strongly magnetized objects, namely magnetars, accreting X-ray pulsars, and rotation powered pulsars. We also discuss the science potential of eXTP for QED studies. Developed by an international Consortium led by the Institute of High Energy Physics of the Chinese Academy of Sciences, the eXTP mission is expected to be launched in the mid 2020s.

关键词： neutron stars QED magnetars accreting pulsars eXTP

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The HEPD particle detector of the CSES satellite mission for investigating seismo-associated perturbations of the Van Allen belts

引用

Science China(Technological Sciences) 2018年第5期61卷 643-652页

作者： AMBROSI Giovanni BARTOCCI Simona BASARA Laurent BATTISTON Roberto BURGER William J. CARFORA Luca CASTELLINI Guido CIPOLLONE Piero CONTI Livio CONTIN Andrea DE DONATO Cinzia DE SANTIS Cristian FOLLEGA Francesco M. GUANDALINI Cristina IONICA Maria IUPPA Roberto LAURENTI Giuliano LAZZIZZERA Ignazio LOLLI Mauro MANEA Christian MARCELLI Laura MASCIANTONIO Giuseppe MERGE Matteo OSTERIA Giuseppe PACINI Lorenzo PALMA Francesco PALMONARI Federico PANICO Beatrice PATRIZII Laura PERFETTO Francesco PICOZZA Piergiorgio POZZATO Michele PUEL Matteo RASHEVSKAYA Irina RICCI Ester RICCI Marco RICCIARINI Sergio Bruno SCOTTI Valentina SOTGIU Alessando SPARVOLI Roberta SPATARO Bruno VITALE Vincenzo istituto Nazionale di Fisica Nucleare (INFN) Sezione di Perugia Perugia 06123 Italy Uninettuno University Rome 00186 Italy istituto Nazionale di Fisica Nucleare (INFN) Sezione di Roma Tor Vergata Rome 00133 Italy istituto Nazionale di Fisica Nucleare (INFN) TIFPA Povo (TN) 38123 Italy Dipartimento di Fisica Universita di Trento Povo (TN) 38123 Italy Dipartimento di Fisica Universita di Roma Tor Vergata Rome 00133 Italy IFAC-CNR Sesto Fiorentino (FI) 50019 Italy Dipartimento di Fisica e Astronomia Universita di Bologna Bologna 40127 Italy istituto Nazionale di Fisica Nucleare (INFN) Sezione di Bologna Bologna 40127 Italy istituto Nazionale di Fisica Nucleare (INFN) Sezione di Napoli Naples 80126 Italy istituto Nazionale di Fisica Nucleare (INFN) LNE Frascati (RM) 00044 Italy Agenzia spaziale Italiana (ASI) SSDC Rome 00133 Italy

CSES(China Seismo-Electromagnetic Satellite) is a mission developed by CNSA(Chinese National Space Administration) and ASI(Italian Space Agency), to investigate the near-Earth electromagnetic, plasma and particle environment, for studying the seismo-associated disturbances in the ionosphere-magnetosphere transition zone. The anthropogenic and electromagnetic noise,as well as the natural non-seismic electromagnetic emissions is mainly due to tropospheric activity. In particular, the mission aims to confirming the existence of possible temporal correlations between the occurrence of earthquakes for medium and strong magnitude and the observation in space of electromagnetic perturbations, plasma variations and precipitation of bursts with highenergy charged particles from the inner Van Allen belt. In this framework, the high energy particle detector(HEPD) of the CSES mission has been developed by the Italian LIMADOU Collaboration. HEPD is an advanced detector based on a tower of scintillators and a silicon tracker that provides good energy and angular resolution and a wide angular acceptance, for electrons of 3–100 Me V, protons of 30–200 Me V and light nuclei up to the oxygen. CSES satellite has been launched on February 2^(nd), 2018 from the Jiuquan Satellite Launch Center(China).

关键词：卫星发射中心粒子带子空间管理合作开发空间机构轻原子核意大利

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Advanced Laser Retroreflectors for Astrophysics and Space Science

引用

Journal of Applied Mathematics and Physics 2015年第2期3卷 218-227页

作者： S. Dell’ Agnello G. Delle Monache R. Vittori A. Boni C. Cantone E. Ciocci M. Martini G. Patrizi M. Tibuzzi G. Bianco D. Currie N. Intaglietta L. Salvatori C. Lops S. Contessa L. Porcelli C. Mondaini P. Tuscano M. Maiello istituto Nazionale di Fisica Nucleare—Laboratori Nazionali di Frascati (INFN-LNF) Frascati Italy Agenzia spaziale Italiana—Centro di Geodesia spaziale (ASI-CGS) Matera Italy University of Maryland at College Park MD USA

We developed advances laser retroreflectors for solar system exploration, geodesy and for precision test of General Relativity (GR) and new gravitational physics: a micro-reflector array (INRRI, Instrument for landing-Roving laser Retroreflectors Investigations), a midsize reflector array for the European Earth Observation (EO) program, Copernicus (CORA, COpernicus laser Retroreflector Array), a large, single-retroreflector (MoonLIGHT, Moon Laser Instrumentation for General relativity High accuracy Tests). These laser retroreflectors will be fully characterized at the SCF_Lab (Satellite/lunar/GNSS laser ranging/altimetry Cube/microsat Characterization Facilities Laboratory), a unique and dedicated infrastructure of INFN-LNF (***/esperimenti/etrusco/). Our research program foresees several activities: 1) Developing and characterizing the mentioned laser retroreflector devices to determine landing accuracy, rover positioning during exploration and planetary/Moon’s surface georeferencing. These devices will be passive, laser wavelength- independent, long-lived reference point. INRRI will enable the performance of full-column measurement of trace species in the Mars atmosphere by future space-borne lidars. These measurements will be complementary to highly localized measurements made by gas sampling techniques on the Rover or by laser back-scattering lidar techniques on future orbiters and/or from the surface. INRRI will also support laser and quantum communications, carried out among future Mars Orbiters and Mars Rovers. This will be possible also because the INRRI laser retroreflectors will be metal back-coated and, therefore, will not change the photon polarization. The added value of INRRI is its low mass, compact size, zero maintenance and its usefulness for any future laser altimetry, ranging, communications, atmospheric lidar capable Mars orbiter, for virtually decades after the end of the Mars surface mission, like the Apollo and Lunokhod lunar laser

关键词： General Relativity Satellite Laser Ranging (SLR) Lunar Laser Ranging (LLR) Cube Corner Retroreflectors (CCR)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Accretion in strong field gravity with eXTP

引用

Science China(Physics,Mechanics & Astronomy) 2019年第2期62卷 45-73页

作者： Alessandra De Rosa Phil Uttley LiJun Gou Yuan Liu Cosimo Bambi Didier Barret Tomaso Belloni Emanuele Berti Stefano Bianchi Ilaria Caiazzo Piergiorgio Casella Marco Feroci Valeria Ferrari Leonardo Gualtieri Jeremy Heyl Adam Ingram Vladimir Karas FangJun Lu Bin Luo Giorgio Matt Sara Motta Joseph Neilsen Paolo Pani Andrea Santangelo XinWen Shu JunFeng Wang Jian-Min Wang YongQuan Xue YuPeng Xu WeiMin Yuan YeFei Yuan Shuang-Nan Zhang Shu Zhang Ivan Agudo Lorenzo Amati Nils Andersson Cristina Baglio Pavel Bakala Altan Baykal Sudip Bhattacharyya Ignazio Bombaci NiccolóBucciantini Fiamma Capitanio Riccardo Ciolfi Wei K.Cui Filippo D'Ammando Thomas Dauser Melania Del Santo Barbara De Marco Tiziana Di Salvo Chris Done Michal Dovciak Andrew C.Fabian Maurizio Falanga Angelo Francesco Gambino Bruce Gendre Victoria Grinberg Alexander Heger Jeroen Homan Rosario Iaria JiaChen Jiang ChiChuan Jin Elmar Koerding Manu Linares Zhu Liu Thomas J.Maccarone Julien Malzac Antonios Manousakis Frédéric Marin Andea Marinucci Missagh Mehdipour Mariano Méndez Simone Migliari Cole Miller Giovanni Miniutti Emanuele Nardini Paul T.O'Brien Julian P.Osborne Pierre Olivier Petrucci Andrea Possenti Alessandro Riggio Jerome Rodriguez Andrea Sanna LiJing Shao Malgosia Sobolewska Eva Sramkova Abigail L.Stevens Holger Stiele Giulia Stratta Zdenek Stuchlik Jiri Svoboda Fabrizio Tamburini Thomas M.Tauris Francesco Tombesi Gabriel Torok Martin Urbanec Frederic Vincent QingWen Wu Feng Yuan Jean J.M.in't Zand Andrzej A.Zdziarski XinLin Zhou INAF-istituto di astrofisica e Planetologie Spaziali Via Fosso del Cavaliere Anton Pannekoek Institute for Astronomy University of Amsterdam National Astronomical Observatories Chinese Academy of Science Institute of High Energy Physics Chinese Academy of Science Center for Field Theory and Particle Physics and Department of Physics Fudan University IRAP Universitéde ToulouseCNRSUPSCNES INAF-Osservatorio Astronomico di Brera Department of Physics and Astronomy The University of MississippiUniversity Dipartimento di Matematica e Fisica Universitàdegli studi Roma Tre University of British Columbia INAF-Osservatorio Astronomico di Roma INFN-Roma 2 c/o Dipartimento di Fisica II Universit?di Roma"Tor Vergata" Dipartimento di Fisica Universitàdegli Studi di Roma"La Sapienza"&Sezione INFN Roma1 Department of Physics University of OxfordClarendon Laboratory Astronomical Institute Academy of Sciences School of Astronomy and Space Science Nanjing University MIT Kavli Institute for Astrophysics and Space Research Institut für Astronomie und Astrophysik Eberhard Karls Universität Department of Physics Anhui Normal University Department of Astronomy and Institute of Theoretical Physics and Astrophysics Xiamen University CAS Key Laboratory for Research in Galaxies and Cosmology Department of AstronomyUniversity of Science and Technology of China Instituto de Astrofísica de Andalucia(CSIC) Glorieta de la Astronomía s/n INAF-istituto di astrofisica spaziale e Fisica cosmica di Bologna Mathematical Sciences and STAG Research Centre University of Southampton New York University Abu Dhabi Institute of Physics and Research Centre for Computational Physics and Data Processing Faculty of Philosophy&ScienceSilesian University in OpavaíBezru?ovo nám. Department of Physics Middle East Technical University Department of Astronomy and Astrophysics Tata Institute of Fundamental Research Dipartimento di Fisica Universit?di Pisa&INFN INAF-Osservatorio Astrofisico di Arcetri INAF-Osservatorio Astronomico di Padova INFN-TIFPA Trento Ins

In this paper we describe the potential of the enhanced X-ray Timing and Polarimetry(eXTP) mission for studies related to accretion flows in the strong field gravity regime around both stellar-mass and supermassive black-holes. eXTP has the unique capability of using advanced "spectral-timing-polarimetry" techniques to analyze the rapid variations with three orthogonal diagnostics of the flow and its geometry, yielding unprecedented insight into the inner accreting regions, the effects of strong field gravity on the material within them and the powerful outflows which are driven by the accretion process.

关键词： X-ray black holes physics accretion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

THE X-RAY AFTERGLOW OF THE GAMMA-RAY BURST OF 1997 MAY 8:SPECTRAL VARIABILITY AND POSSIBLE EVIDENCE OF AN IRON LINE

THE X-RAY AFTERGLOW OF THE GAMMA-RAY BURST OF 1997 MAY 8:SPE...

引用

中国天文学会高能分会2004年学术年会

作者： L.Piro E.Costa M.Feroci F.Frontera L.Amati D.Dal Fiume L.A.Antonelli J.Heise J.in’t Zand A.Owens A.N.Parmar G.Cusumano M.Vietri G.C.Perola istituto Astrofi sica spaziale Consiglio Nazionale delle Ricerche Via Fosso del Cavaliere 100 00133 Rome Italy istituto Astrofi sica spaziale Consiglio Nazionale delle Ricerche Via Fosso del Cavaliere 100 00133 Rome Italy istituto Astrofi sica spaziale Consiglio Nazionale delle Ricerche Via Fosso del Cavaliere 100 00133 Rome Italy istituto Tecnologie e Studio delle Radiazioni Extraterrestri Consiglio Nazionale delle Ricerche Via Gobetti 101 40129 Bologna Italy.Dipartimento di Fisica Universita` Ferrara Via Paradiso 12 Ferrara Italy istituto Tecnologie e Studio delle Radiazioni Extraterrestri Consiglio Nazionale delle Ricerche Via Gobetti 101 40129 Bologna Italy istituto Tecnologie e Studio delle Radiazioni Extraterrestri Consiglio Nazionale delle Ricerche Via Gobetti 101 40129 Bologna Italy BeppoSAX Scienti?c Data Center present address: Osservatorio Astron-omico di Roma Space Research Organization in the Netherlands Sorbonnelaan 2 3584 CA Utrecht Netherlands Space Research Organization in the Netherlands Sorbonnelaan 2 3584 CA Utrecht Netherlands Space Science Department of ESA European Space Research and Tech- nology Centre 2200 AG Noordwijk Netherlands Space Science Department of ESA European Space Research and Tech- nology Centre 2200 AG Noordwijk Netherlands istituto Fisica Cosmica e Applicazioni Calcolo Informatico Consiglio Nazionale delle Ricerche Via La Malfa 153 90138 Palermo Italy Dipartimento di Fisica Universit Roma Tre Via della Vasca Navale 84 00146 Roma Italy Dipartimento di Fisica Universit Roma Tre Via della Vasca Navale 84 00146 Roma Italy

We report the possible detection (99.3% of statistical signi?cance) of redshifted iron line emission in the X-ray afterglow of gamma-ray burst GRB 970508 observed by BeppoSAX. Its energy is consisten

关键词： gamma rays: bursts — line: formation — X-rays: general

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Observation of X-ray Lines from a Gamma-Ray Burst （GRB991216）:Evidence of Moving Ejecta from the Progenitor

Observation of X-ray Lines from a Gamma-Ray Burst （GRB99121...

引用

中国天文学会高能分会2004年学术年会

作者： L.Piro G.Garmire M.Garcia G.Stratta E.Costa M.Feroci P.Mszros M.Vietri H.Bradt D.Frail F.Frontera J.Halpern J.Heise K.Hurley N.Kawai R.M.Kippen F.Marshall T.Murakami V.V.Sokolov T.Takeshima A.Yoshida istituto astrofisica spaziale Consiglio Nazionale delle Ricerche （CNR） Via Fosso del Cavaliere 00133 Roma Italy Department of Astronomy and Astro-physics 525 Davey Lab Pennsylvania State Universi-ty University Park PA 16802 USA Harvard–Smith- sonian Center for Astrophysics 60 Garden Street Cambridge MA 02138 USA istituto Astro?sica spaziale Consiglio Nazionale delle Ricerche （CNR） Via Fosso del Cavaliere 00133 Roma Italy istituto Astro?sica spaziale Consiglio Nazionale delle Ricerche （CNR） Via Fosso del Cavaliere 00133 Roma Italy istituto Astro?sica spaziale Consiglio Nazionale delle Ricerche （CNR） Via Fosso del Cavaliere 00133 Roma Italy Department of Astronomy and Astro-physics 525 Davey Lab Pennsylvania State Universi-ty University Park PA 16802 USA Department of Physics Universita’Roma Tre Via della Vasca Navale 84 00146 Roma Italy Massachusetts Institute of Tech-nology 77 Massachusetts Avenue Cambridge MA02139 USA National Radio Astronomy Observato-ry 1003 Lopezville Road Socorro NM 87801 USA istituto Tecnologie e Studio Radiazioni Extraterrestri/CNR Via Gobetti 101 40129 Bologna Italy Depart-ment of Astrophysics Columbia University New York NY 10027 USA Space Research Organization in the Netherlands Sorbonnelaan 2 3584 CA Utrecht Netherlands University of California Space Science Laboratory Berkeley CA 94720 USA Institute of Physical and Chemical Research （RIKEN） 2-1 Hiro- sawa Wako-Shi Saitama 351-0198 Japan. Univer-sity of Alabama NASA/Marshall Space Flight Center Huntsville AL 35899 USA NASA/Goddard Space Flight Center Code 661 Greenbelt MD 20771 USA Institute of Space and Astronautical Science 3-1-1 Yoshinodai Sagamihara Kanagawa 229-8510 Japan Russian Academy of Sciences Special Astrophysical Observatory Nizhnij Arkhyz Zelenchukskaya Karachaevo-Cherkesia 369167Russia NASDA Na-tional Space Development Agency of Japan WTC Building 2-4-1 Hamamatsu-cho Minato-ku Tokyo 105-60 Japan. Institute of Physical and Chemi

We report on the discovery of two emission features observed in the x-ray spectrum of the afterglow of the gamma-ray burst (GRB) of 16 December 1999 by the Chandra X-ray Observatory. These features

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：