MULTIWAVELENGTH OBSERVATIONS OF MARKARIAN-421 DURING A TEV X-RAY FLARE

被引：152

作者：

MACOMB, DJ

AKERLOF, CW

ALLER, HD

ALLER, MF

BERTSCH, DL

BRUHWEILER, F

BUCKLEY, JH

CARTERLEWIS, DA

CAWLEY, MF

CHENG, KP

DERMER, C

FEGAN, DJ

GAIDOS, JA

GEAR, WK

HALL, CR

HARTMAN, RC

HILLAS, AM

KAFATOS, M

KERRICK, AD

KNIFFEN, DA

KONDO, Y

KUBO, H

LAMB, RC

MAKINO, F

MAKISHIMA, K

MARSCHER, A

MCENERY, J

MCHARDY, IM

MEYER, DI

MOORE, EM

RAMOS, E

ROBSON, EI

ROSE, HJ

SCHUBNELL, MS

SEMBROSKI, G

STEVENS, JA

TAKAHASHI, T

TASHIRO, M

WEEKES, TC

WILSON, C

ZWEERINK, J

机构：

[1] UNIV MICHIGAN,DEPT PHYS,ANN ARBOR,MI 48109

[2] UNIV MICHIGAN,DEPT ASTRON,ANN ARBOR,MI 48109

[3] CATHOLIC UNIV AMER,WASHINGTON,DC 20064

[4] NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771

[5] IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011

[6] ST PATRICKS COLL,DEPT PHYS,MAYNOOTH,KILDARE,IRELAND

[7] USN,RES LAB,DIV SPACE SCI,WASHINGTON,DC 20375

[8] PURDUE UNIV,DEPT PHYS,W LAFAYETTE,IN 47907

[9] ROYAL OBSERV,EDINBURGH EH9 3HJ,MIDLOTHIAN,SCOTLAND

[10] UNIV LEEDS,DEPT PHYS,LEEDS LS2 9JT,W YORKSHIRE,ENGLAND

[11] GEORGE MASON UNIV,CSI,INST SCI & TECHNOL,SPACE SCI PROGRAM,FAIRFAX,VA 22030

[12] HAMPDEN SYDNEY COLL,DEPT PHYS & ASTRON,HAMPDEN SYDNEY,VA 23943

[13] UNIV TOKYO,DEPT PHYS,BUNKYO KU,TOKYO 113,JAPAN

[14] INST SPACE & ASTRONAUT SCI,SAGAMIHARA,KANAGAWA 229,JAPAN

[15] BOSTON UNIV,DEPT ASTRON,BOSTON,MA 02215

[16] UNIV SOUTHAMPTON,DEPT PHYS,SOUTHAMPTON SO9 5NH,HANTS,ENGLAND

[17] JOINT ASTRON CTR,HILO,HI 96720

[18] UNIV CENT LANCASHIRE,CTR ASTROPHYS,PRESTON PR1 2HE,LANCS,ENGLAND

[19] UNIV COLL DUBLIN,DEPT PHYS,DUBLIN 4,IRELAND

[20] HARVARD SMITHSONIAN CTR ASTROPHYS,WHIPPLE OBSERV,AMADO,AZ 85645

来源：

ASTROPHYSICAL JOURNAL | 1995年 / 449卷 / 02期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

BL LACERTAE OBJECTS; GENERAL; INDIVIDUAL; (MARKARIAN; 421);

D O I：

10.1086/309646

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A TeV flare from the BL Lac object Mrk 421 was detected in May of 1994 by the Whipple Observatory air Cherenkov experiment during which the flux above 250 GeV increased by nearly an order of magnitude over a 2-day period. Contemporaneous observations by ASCA showed the X-ray flux to be in a very high state. We present these results, combined with the first ever simultaneous or nearly simultaneous observations at GeV gamma-ray, UV, IR, mm, and radio energies for this nearest BL Lac object. While the GeV gamma-ray flux increased slightly, there is little evidence for variability comparable to that seen at TeV and X-ray energies. Other wavelengths show even less variability. This provides important constraints on the emission mechanisms at work. We present the multiwavelength spectrum of this gamma-ray blazar for both quiescent and flaring states and discuss the data in terms of current models of blazar emission.

引用

页码：L99 / L103

页数：5

共 27 条

[1] SPECTRA AND LINEAR POLARIZATIONS OF EXTRAGALACTIC VARIABLE SOURCES AT CENTIMETER WAVELENGTHS [J].