CAJ | 학술논문

利用云南天文台1m光学望远镜2000～2001年对3个GeV和/或TeV γ噪Blazar天体的观测,发现γ噪类星体PKS 1510-089在R波段有一个光变时标为41min的星等变化为2.0mag的剧烈光变,这是迄今为止我们所观测到的变幅最大的一个γ噪Blazar天体短时标光变.对此光变,可估计限制光变辐射模型的一些参数,如辐射区半径R、多普勒因子δ以及吸积转化效率η等.η=59.6的值强烈预示着相对论聚束效应可较好解释γ噪Blazar天体的辐射机制.我们仔细考察了大气视宁度对光变的影响.发现对1ES 2344+514,观测到的光变与当地大气视宁度有一个弱相关,结果表明,对光变参数较小(C＜5)的光变,大气视宁度引起的假光变的贡献较大,需要选择较严格的光变判据.
이용운남천문태1m광학망원경2000～2001년대3개GeV화/혹TeV γ조Blazar천체적관측,발현γ조류성체PKS 1510-089재R파단유일개광변시표위41min적성등변화위2.0mag적극렬광변,저시흘금위지아문소관측도적변폭최대적일개γ조Blazar천체단시표광변.대차광변,가고계한제광변복사모형적일사삼수,여복사구반경R、다보륵인자δ이급흡적전화효솔η등.η=59.6적치강렬예시착상대론취속효응가교호해석γ조Blazar천체적복사궤제.아문자세고찰료대기시저도대광변적영향.발현대1ES 2344+514,관측도적광변여당지대기시저도유일개약상관,결과표명,대광변삼수교소(C＜5)적광변,대기시저도인기적가광변적공헌교대,수요선택교엄격적광변판거.
We present the optical (V and R) photometry for three GeV and/or TeV γ-ray blazars,which were observed from 2000 through 2001,with the 1-m telescope at Yunnan Observatory.Through the observational period,the GeV γ-ray-loud source,PKS 1510-089,was very active and,it showed a significant variability of 2.0 mag within 41 min in the R band.This is the most violently rapid variability in our optical monitoring program for blazars since 1982. For this source,some physical parameters,namely the emission size,Doppler factor δ,the efficiency (η) for conversion of accreted matter into energy and luminosity are calculated. A η=59.6 was obtained,strongly implying that the relativistic beaming is responsible for the rapid variability of the γ-ray loud source.The influence of variable seeing conditions on the observations was carefully investigated.There is weak correlation between the observed variability and the local seeing conditions for the object 1ES 2344+514.The results show that the seeing fluctuations would influence the spurious variation in microvariability when the variability parameter C＜5.