2006年多波段观测期间MAGIC望远镜对马卡良421的TeV伽马射线观测
宇宙学与河外天体物理
2014-11-20 v2
摘要
大气伽马成像切伦科夫望远镜（MAGIC）参与了三次多波段（MWL）观测活动，在2006年4月28日、29日和2006年6月14日夜间观测了耀变体马卡良（Mkn）421。我们分析了2006年4月22日至30日共9个夜晚以及2006年6月14日相应的MAGIC甚高能观测数据。我们推断出了亚日分辨率的光变曲线和逐夜能谱。在所有观测夜晚，都从Mkn 421探测到了强烈的伽马射线信号。在2006年4月，通量（E > 250 GeV）在逐夜基础上介于(0.92±0.11)×10^-10 cm^-2 s^-1（0.57蟹状星云单位）和(3.21±0.15)×10^-10 cm^-2 s^-1（2.0蟹状星云单位）之间。有明确迹象表明，在2006年4月29日夜间存在夜内光变，倍增时间为36±10（统计）分钟，再次证实了该天体的快速通量变化。所有单个夜晚的伽马射线能谱均可推断得出，幂律指数范围从1.66到2.47。我们没有发现单个夜晚的谱指数与通量状态之间存在统计上显著的相关性。在2006年6月的观测活动中，发现通量远低于四天后Whipple 10米望远镜测量的值。使用对数抛物线幂律拟合，我们推断出某些数据集的能谱峰值位于甚高能波段。我们的结果证实了峰值能量随通量增加而升高的迹象，这与轻子加速模型的预期一致。
引用
@article{arxiv.1001.1291,
title = {MAGIC TeV Gamma-Ray Observations of Markarian 421 during Multiwavelength Campaigns in 2006},
author = {MAGIC Collaboration and J. Aleksić and L. A. Antonelli and P. Antoranz and M. Backes and C. Baixeras and S. Balestra and J. A. Barrio and D. Bastieri and J. Becerra González and W. Bednarek and A. Berdyugin and K. Berger and E. Bernardini and A. Biland and R. K. Bock and G. Bonnoli and P. Bordas and D. Borla Tridon and V. Bosch-Ramon and D. Bose and I. Braun and T. Bretz and D. Britzger and M. Camara and E. Carmona and A. Carosi and P. Colin and S. Commichau and J. L. Contreras and J. Cortina and M. T. Costado and S. Covino and F. Dazzi and A. De Angelis and E. De Cea del Pozo and C. Delgado Mendez and R. De los Reyes and B. De Lotto and M. De Maria and F. De Sabata and M. Doert and A. Domínguez and D. Dominis Prester and D. Dorner and M. Doro and D. Elsaesser and M. Errando and D. Ferenc and M. V. Fonseca and L. Font and R. J. García López and M. Garczarczyk and M. Gaug and N. Godinovic and D. Hadasch and A. Herrero and D. Hildebrand and D. Höhne-Mönch and J. Hose and D. Hrupec and C. C. Hsu and T. Jogler and S. Klepser and T. Krähenbühl and D. Kranich and A. La Barbera and A. Laille and E. Leonardo and E. Lindfors and S. Lombardi and F. Longo and M. López and E. Lorenz and P. Majumdar and G. Maneva and N. Mankuzhiyil and K. Mannheim and L. Maraschi and M. Mariotti and M. Martínez and D. Mazin and M. Meucci and J. M. Miranda and R. Mirzoyan and H. Miyamoto and J. Moldón and M. Moles and A. Moralejo and D. Nieto and K. Nilsson and J. Ninkovic and R. Orito and I. Oya and S. Paiano and R. Paoletti and J. M. Paredes and S. Partini and M. Pasanen and D. Pascoli and F. Pauss and R. G. Pegna and M. A. Perez-Torres and M. Persic and L. Peruzzo and F. Prada and E. Prandini and N. Puchades and I. Puljak and I. Reichardt and W. Rhode and M. Ribó and J. Rico and M. Rissi and S. Rügamer and A. Saggion and T. Y. Saito and M. Salvati and M. Sánchez-Conde and K. Satalecka and V. Scalzotto and V. Scapin and C. Schultz and T. Schweizer and M. Shayduk and S. N. Shore and A. Sierpowska-Bartosik and A. Sillanpää and J. Sitarek and D. Sobczynska and F. Spanier and S. Spiro and A. Stamerra and B. Steinke and J. C. Struebig and T. Suric and L. Takalo and F. Tavecchio and P. Temnikov and T. Terzic and D. Tescaro and M. Teshima and D. F. Torres and H. Vankov and R. M. Wagner and V. Zabalza and F. Zandanel and R. Zanin},
journal= {arXiv preprint arXiv:1001.1291},
year = {2014}
}
备注
11 pages, 7 figures, accepted for publication by Astron. Astrophys