GAMMA-RAY AND OPTICAL OSCILLATIONS IN PKS 0537-441

被引：40
|
作者：
Sandrinelli, A. [1 ,2 ]
Covino, S. [2 ]
Treves, A. [1 ,2 ,3 ]
机构：
[1] Univ Insubria, Via Valleggio 11, I-22100 Como, Italy
[2] INAF Inst Nazl Astrofis, Osservatorio Astron Brera, Via Emilio Bianchi 46, I-23807 Merate, Italy
[3] Ist Nazl Fis Nucl, Sez Trieste, Via Valerio 2, I-34127 Trieste, Italy
来源：
ASTROPHYSICAL JOURNAL | 2016年 / 820卷 / 01期
关键词：
BL Lacertae objects: general; BL Lacertae objects: individual (PKS 0537-441); galaxies: jets; gamma rays: galaxies; gamma rays: general; QUASI-PERIODIC OSCILLATION; TIME-SERIES; OJ; 287; BLAZARS; VARIABILITY; OBJECT; TELESCOPE; OUTBURST; BINARY; REM;
D O I：
10.3847/0004-637X/820/1/20
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have considered the Fermi gamma-ray light curve of the blazar PKS 0537-441 during a high state extending from 2008 August 10 to 2011 August 27. The periodogram exhibits a peak at T similar to 280 days, with a significance of similar to 99.7%. A peak of similar relevance at 1/2T is found in the optical light curves. Considering the entire duration of the Fermi light curve 2008-2015, no significant peak is revealed, while the optical one remains meaningful. Comparing with recent observations of PKS 2155-304 and PG 1553+113 it seems that month-year oscillations can characterize some blazars. Month-scale oscillations can also show up only during phases of enhanced or bursting emission, such as in the case of PKS 0537-441.
引用
收藏
页数：6
相关论文
共 50 条
  • [1] Microvariability in the southern gamma-ray blazar PKS 0537-441
    Romero, GE
    Combi, JA
    Cellone, SA
    [J]. FIFTH COMPTON SYMPOSIUM, 2000, 510 : 333 - 336
  • [2] GAMMA-RADIATION FROM BLAZAR PKS 0537-441
    THOMPSON, DJ
    BERTSCH, DL
    FICHTEL, CE
    HARTMAN, RC
    HUNTER, SD
    KANBACH, G
    KNIFFEN, DA
    KWOK, PW
    LIN, YC
    MATTOX, JR
    MAYERHASSELWANDER, HA
    MICHELSON, PF
    VONMONTIGNY, C
    NOLAN, PL
    PINKAU, K
    SCHNEID, EJ
    SREEKUMAR, P
    [J]. ASTROPHYSICAL JOURNAL, 1993, 410 (01): : 87 - 89
  • [3] The gravitational microlensing scenario for PKS 0537-441
    Surpi, GC
    Romero, GE
    Vucetich, H
    [J]. REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA, 1996, 32 (02) : 153 - 159
  • [4] ROSAT OBSERVATIONS OF THE BLAZAR PKS 0537-441
    TREVES, A
    BELLONI, T
    FALOMO, R
    FINK, H
    MARASCHI, L
    SAMBRUNA, RM
    TAGLIAFERRI, G
    ZIMMERMANN, HU
    [J]. ASTROPHYSICAL JOURNAL, 1993, 406 (02): : 447 - 450
  • [5] Multiband optical-IR variability of the blazar PKS 0537-441
    Li, Xiao-Pan
    Wang, Li-Sha
    Yang, Cheng
    Yang, Hai-Yan
    Zhou, Li
    Xu, Guang-Yang
    Shan, Yu-Qiong
    Liu, Jie
    Luo, Yu-Hui
    Zhang, Li
    [J]. JOURNAL OF ASTROPHYSICS AND ASTRONOMY, 2018, 39 (03)
  • [6] PHOTOMETRIC HISTORY OF OBJECT IDENTIFIED WITH PKS 0537-441
    LILLER, W
    [J]. ASTROPHYSICAL JOURNAL, 1974, 189 (03): : L101 - L102
  • [7] MULTIFREQUENCY OBSERVATIONS OF THE BL LACERTAE OBJECT PKS 0537-441
    MARASCHI, L
    SCHWARTZ, DA
    TANZI, EG
    TREVES, A
    [J]. ASTROPHYSICAL JOURNAL, 1985, 294 (02): : 615 - 618
  • [8] Broad-band continuum and line emission of the γ-ray blazar PKS 0537-441
    Pian, E
    Falomo, R
    Hartman, RC
    Maraschi, L
    Tavecchio, F
    Tornikoski, M
    Treves, A
    Urry, CM
    Ballo, L
    Mukherjee, R
    Scarpa, R
    Thompson, DJ
    Pesce, JE
    [J]. ASTRONOMY & ASTROPHYSICS, 2002, 392 (02) : 407 - 415
  • [9] Colour variation of the BL Lacertae object PKS 0537-441
    Li, Xiaopan
    Zhang, Li
    Luo, Yuhui
    Wang, Lisha
    Zhou, Li
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2015, 449 (03) : 2750 - 2758
  • [10] PKS 0537-441 - AN ELUSIVE CASE OF A GRAVITATIONALLY LENSED BLAZER
    FALOMO, R
    MELNICK, J
    TANZI, EG
    [J]. ASTRONOMY & ASTROPHYSICS, 1992, 255 (1-2) : L17 - L19
12345