Gamma-ray variability of BL LACS at E>300 GeV

被引：6

作者：

Buckley, JH

Akerlof, CW

Biller, S

Boyle, PJ

Breslin, AC

Carter-Lewis, DA

Cantanese, M

Cawley, MF

Connaughton, V

Fegan, DJ

Finley, JP

Gaidos, J

Gordo, JB

Hillas, AM

Krennrich, F

Lambs, RC

Lessard, R

Masterson, C

McEnery, JE

Mohanty, G

Moriarty, P

Quinn, J

Rodgers, AJ

Rose, HJ

Samuelson, F

Schubnell, MS

Sembroski, G

Srinivasan, R

Weekes, TC

Wilson, C

Zweerink, J

机构：

[1] Harvard Smithsonian CfA, Whipple Observ, Amado, AZ 85645 USA

[2] Univ Michigan, Randall Lab Phys, Ann Arbor, MI 48109 USA

[3] Univ Leeds, Dept Phys, Leeds LS2 9JT, W Yorkshire, England

[4] Natl Univ Ireland Univ Coll Dublin, Dept Phys, Dublin 4, Ireland

[5] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[6] St Patricks Coll, Dept Phys, Maynooth, Kildare, Ireland

[7] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA

[8] Reg Tech Coll, Dept Phys, Galway, Ireland

来源：

SPACE BASED ASTRONOMY: ISO, AGN, RADIOPULSARS AND THE SUN | 1998年 / 21卷 / 1-2期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1016/S0273-1177(97)00620-0

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

We report on observations of Mrk 421 and Mrk 501 at E-gamma >300 GeV during the 1995 and 1996 seasons. A multiwavelength observing campaign on Mrk 421 in the period 1995 April 20 to May 5 indicates correlations in the gamma-ray, X-ray, extreme ultraviolet, and optical wavelengths. Dramatic outbursts of TeV gamma-rays were detected on two occasions in May of 1996 where the gamma-ray flux reached the highest levels ever recorded (a factor of similar to 20 greater than typical levels) with variability timescales less than or similar to 1hr. Together with the multiwavelength correlations these provide serious constraints on the Doppler factor (delta greater than or similar to 9.9), the size and location of the emission region (R less than or similar to 10(-4)pc) and the mechanism responsible for the gamma-ray emission. Published by Elsevier Science Ltd on behalf of COSPAR.

引用

页码：101 / 107

页数：7

共 25 条

[1] SYNCHROTRON EMISSION FROM SHOCK-WAVES IN ACTIVE GALACTIC NUCLEI [J].