Optical afterglow observations of GRB 021004 and GRB 030226

被引：0
|
作者：
Pandey, SB [1 ]
Sagar, R [1 ]
Bhattacharya, D [1 ]
机构：
[1] Aryabhatta Res Inst Observ Sci, Naini Tal 263129, India
来源：
Astrophysical Sources of High Energy Particles and Radiation | 2005年 / 801卷
关键词：
optical; observations; afterglows;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present our multi-band optical afterglow observations of the long duration GRB 021004 and GRB 030226 in combination with other published data to study the nature of the bursts. Optical afterglow light-curves of both the GRBs exhibit signatures of collimated outflow. Observed superimposed variability in the case of GRB 021004, in the form of bumps and wiggles, suggest density fluctuations in the ambient medium. The derived temporal and spectral flux decay indices of GRB 030226 afterglow show an inconsistency with the theoretically predicted values.
引用
收藏
页码：137 / 138
页数：2
相关论文
共 50 条
  • [1] The optical afterglow of GRB 030226
    Klose, S
    Greiner, J
    Zeh, A
    Rau, A
    Henden, AA
    Hartmann, DH
    Masetti, N
    Castro-Tirado, AJ
    Hjorth, J
    Pian, E
    Tanvir, NR
    Wijers, RAMJ
    van den Heuvel, E
    GAMMA-RAY BURSTS: 30 YEARS OF DISCOVERY, 2004, 727 : 483 - 486
  • [2] Early optical and millimeter observations of GRB 030226 afterglow
    Pandey, SB
    Sagar, R
    Anupama, GC
    Bhattacharya, D
    Sahu, DK
    Castro-Tirado, AJ
    Bremer, A
    ASTRONOMY & ASTROPHYSICS, 2004, 417 (03) : 919 - 924
  • [3] Variable polarization in the optical afterglow of GRB 021004
    Rol, E. (evert@science.uva.nl), 1600, EDP Sciences (405):
  • [4] Variable polarization in the optical afterglow of GRB021004
    Rol, E
    Wijers, RAMJ
    Fynbo, JPU
    Hjorth, J
    Gorosabel, J
    Egholm, MP
    Cerón, JMC
    Castro-Tirado, AJ
    Kaper, L
    Masetti, N
    Palazzi, E
    Pian, E
    Tanvir, N
    Vreeswijk, P
    Kouveliotou, C
    Moller, P
    Pedersen, H
    Fruchter, AS
    Rhoads, J
    Burud, I
    Salamanca, I
    Van den Heuvel, EPJ
    ASTRONOMY & ASTROPHYSICS, 2003, 405 (03) : L23 - L27
  • [5] The afterglow of GRB 021004: Surfing on density waves
    Lazzati, D
    Rossi, E
    Covino, S
    Ghisellini, G
    Malesani, D
    ASTRONOMY & ASTROPHYSICS, 2002, 396 (02) : L5 - L9
  • [6] GRB optical afterglow observations in China
    Deng, Jinsong
    Zheng, Weikang
    Zhai, Meng
    Qiu, Yulei
    Wei, Jianyan
    Hu, Jingyao
    NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA B-BASIC TOPICS IN PHYSICS, 2006, 121 (12): : 1469 - 1470
  • [7] Structure in early afterglow light curves: GRB021004 and GRB030329
    Uemura, M
    Ishioka, R
    Kato, T
    Nogami, D
    Yamaoka, H
    GAMMA-RAY BURSTS: 30 YEARS OF DISCOVERY, 2004, 727 : 320 - 323
  • [8] Modelling the afterglow of GRB 021004 with multiple energy injections
    Postigo, ADU
    Gorosabel, J
    Castro-Tirado, AJ
    Jóhannesson, G
    Björnsson, G
    Gudmundsson, EH
    Bremer, M
    Cerón, JMC
    Guzyi, S
    Jelinek, M
    Pérez-Ramírez, D
    STELLAR END PRODUCTS, 2005, 76 (03): : 655 - 659
  • [9] BVRI observations of the optical afterglow of GRB 990510
    Stanek, KZ
    Garnavich, PM
    Kaluzny, J
    Pych, W
    Thompson, I
    ASTROPHYSICAL JOURNAL, 1999, 522 (01): : L39 - L42
  • [10] Optical and NIR observations of the afterglow of GRB 020813
    Covino, S.
    Malesani, D.
    Tavecchio, F.
    Antonelli, L.A.
    Arkharov, A.
    Di Paola, A.
    Fugazza, D.
    Ghisellini, G.
    Larionov, V.
    Lazzati, D.
    Mannucci, F.
    Masetti, N.
    Barrena, R.
    Benetti, S.
    Castro-Tirado, A.J.
    Di Serego Alighieri, S.
    Fiore, F.
    Frontera, F.
    Fruchter, A.
    Ghinassi, F.
    Gladders, M.
    Hall, P.B.
    Israel, G.L.
    Klose, S.
    Magazzù, A.
    Palazzi, E.
    Pedani, M.
    Pian, E.
    Romano, P.
    Stefanon, M.
    Stella, L.
    Astronomy and Astrophysics, 2003, 404 (01):
12345