OBSERVATION OF 7-TEV GAMMA-RAYS FROM THE CRAB USING THE LARGE ZENITH ANGLE AIR CERENKOV IMAGING TECHNIQUE

被引:46
作者
TANIMORI, T
TSUKAGOSHI, T
KIFUNE, T
EDWARDS, PG
FUJIMOTO, M
HARA, T
HAYASHIDA, N
MATSUBARA, Y
MIZUMOTO, Y
MURAKI, Y
OGIO, S
PATTERSON, JR
ROBERTS, MD
ROWELL, G
SUDA, T
TAMURA, T
TESHIMA, M
THORNTON, GJ
WATASE, Y
YOSHIKOSHI, T
机构
[1] UNIV TOKYO,INST COSMIC RAY RES,TOKYO 188,JAPAN
[2] UNIV ADELAIDE,DEPT PHYS & MATH PHYS,ADELAIDE,SA 5005,AUSTRALIA
[3] NATL ASTRON OBSERV,TOKYO 181,JAPAN
[4] YUGE NATL COLL MARITIME TECHNOL,DEPT INFORMAT TECHNOL,EHIME 79425,JAPAN
[5] KOBE UNIV,DEPT PHYS,HYOGO 637,JAPAN
[6] NAGOYA UNIV,SOLAR TERR ENVIRONM LAB,NAGOYA,AICHI 464,JAPAN
[7] NATL LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN
关键词
GAMMA RAYS; OBSERVATIONS; PULSARS; INDIVIDUAL (CRAB NEBULA; CRAB PULSAR); SUPERNOVA REMNANTS;
D O I
10.1086/187413
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have observed the Crab pulsar/nebula from 1992 December to 1993 January to search for very high energy gamma rays, using an imaging air Cerenkov telescope of 3.8 m diameter, located at Woomera, Australia. Since the observation was carried out in the southern hemisphere, the zenith angle of the object is large, which results in a maximum sensitivity of approximately 10(-13) cm-2 s-1 with approximately 7 TeV threshold energy for detected gamma rays. With high angular resolution, the Cerenkov imaging technique is found to be useful at zenith angles 53-degrees-56-degrees. We report here possible evidence of detection with 4 sigma significance of very high energy gamma-rays above approximately 7 TeV from the Crab pulsar/nebula. The integral flux is estimated to be (7.6 +/- 1.9) x 10(-13) cm-2 s-1. The result is consistent with the revised spectrum of the Crab recently reported by the Whipple group (Lewis et al. 1993).
引用
收藏
页码:L61 / L64
页数:4
相关论文
共 20 条
[1]  
ALEXANDREAS DE, 1991, APJ, V383, P653
[2]   SEARCH FOR STEADY EMISSION OF 10-TEV GAMMA-RAYS FROM THE CRAB-NEBULA, CYGNUS-X-3, AND HERCULES-X-1 USING THE TIBET AIR SHOWER ARRAY [J].
AMENOMORI, M ;
CAO, Z ;
DING, LK ;
FENG, ZY ;
HIBINO, K ;
HOTTA, N ;
HUANG, Q ;
HUO, AX ;
JIA, HY ;
JIANG, GZ ;
JIAO, SQ ;
KAJINO, F ;
KASAHARA, K ;
LABACIREN ;
MEI, DM ;
MENG, L ;
MENG, XR ;
MIMACIREN ;
MIZUTANI, K ;
MU, J ;
NANJO, H ;
NISHIZAWA, M ;
NUSANG ;
OGURO, A ;
OHNISHI, M ;
OHTA, I ;
REN, JR ;
SAITO, T ;
SAKATA, M ;
SHI, ZZ ;
SHIBATA, M ;
SHIRAI, T ;
SUGIMOTO, H ;
SUN, XX ;
TAI, A ;
TAIRA, K ;
TAN, YH ;
TATEYAMA, N ;
TORII, S ;
WANG, H ;
WEN, CZ ;
YAMAMOTO, Y ;
YAO, XY ;
YU, GC ;
YUAN, P ;
YUDA, T ;
ZENG, JG ;
ZHANG, CS ;
ZHANG, HM ;
ZHANG, L .
PHYSICAL REVIEW LETTERS, 1992, 69 (17) :2468-2471
[3]  
BAILLON P, 1993, 23RD P ICRC CALG CAN, V1, P271
[4]   PULSED HIGH-ENERGY GAMMA-RADIATION FROM GEMINGA (1E0630+178) [J].
BERTSCH, DL ;
BRAZIER, KTS ;
FICHTEL, CE ;
HARTMAN, RC ;
HUNTER, SD ;
KANBACH, G ;
KNIFFEN, DA ;
KWOK, PW ;
LIN, YC ;
MATTOX, JR ;
MAYERHASSELWANDER, HA ;
VONMONTIGNY, C ;
MICHELSON, PF ;
NOLAN, PL ;
PINKAU, K ;
ROTHERMEL, H ;
SCHNEID, EJ ;
SOMMER, M ;
SREEKUMAR, P ;
THOMPSON, DJ .
NATURE, 1992, 357 (6376) :306-307
[5]  
Brun R., 1987, CERNDDEE841
[6]   SEARCH FOR DISCRETE SOURCES OF 100 TEV GAMMA-RADIATION [J].
CRONIN, JW ;
FICK, BE ;
GIBBS, KG ;
KRIMM, HA ;
MASCARENHAS, NC ;
MCKAY, TA ;
MULLER, D ;
NEWPORT, BJ ;
ONG, RA ;
ROSENBERG, LJ ;
GREEN, KD ;
MATTHEWS, J ;
NITZ, D ;
SINCLAIR, D ;
VANDERVELDE, JC .
PHYSICAL REVIEW D, 1992, 45 (12) :4385-4391
[7]   THE EXPECTED HIGH-ENERGY TO ULTRA HIGH-ENERGY GAMMA-RAY SPECTRUM OF THE CRAB-NEBULA [J].
DEJAGER, OC ;
HARDING, AK .
ASTROPHYSICAL JOURNAL, 1992, 396 (01) :161-172
[8]  
DEJAGER OC, 1993, IAU5887 CIRC
[9]  
FESEFELDT H, 1985, PITHA8502 PREPR
[10]   PULSED HIGH-ENERGY GAMMA-RAYS FROM PSR-1055-52 [J].
FIERRO, JM ;
BERTSCH, DL ;
BRAZIER, KT ;
CHIANG, J ;
DAMICO, N ;
FICHTEL, CE ;
HARTMAN, RC ;
HUNTER, SD ;
JOHNSTON, S ;
KANBACH, G ;
KASPI, VM ;
KNIFFEN, DA ;
LIN, YC ;
LYNE, AG ;
MANCHESTER, RN ;
MATTOX, JR ;
MAYERHASSELWANDER, HA ;
MICHELSON, PF ;
VONMONTIGNY, C ;
NOLAN, PL ;
SCHNEID, E ;
THOMPSON, DJ .
ASTROPHYSICAL JOURNAL, 1993, 413 (01) :L27-L30