Multiband photometry of the Blazar PKS 0537-441:: a major active state in December 2004-March 2005

被引：16

作者：

Dolcini, A

Covino, S

Treves, A

Palazzi, E

Pian, E

Molinari, E

Chincarini, G

Zerbi, FM

Rodonó, M

Testa, V

Tosti, G

Vitali, F

Antonelli, LA

Conconi, P

Cutispoto, G

Monfardini, A

Stefanon, M

D'Avanzo, P

Danziger, J

Fernandez-Soto, A

Meurs, E

机构：

[1] Univ Insubria, Dipartimento Matemat & Fis, I-22100 Como, Italy

[2] INAF, Osservatorio Astron Brera, I-23807 Merate, LC, Italy

[3] CNR, IASF, Sez Bologna, I-40129 Bologna, Italy

[4] INAF, Osservatorio Astron Trieste, I-34131 Trieste, Italy

[5] Univ Milan, Dipartimento Fis, I-20126 Milan, Italy

[6] INAF, Osservatorio Astrofis Catania, I-95123 Catania, Italy

[7] Univ Catania, Dipartimento Fis & Astron, I-95123 Catania, Italy

[8] INAF, Osservatorio Astron Roma, I-00040 Monte Porzio Catone, Italy

[9] Univ Perugia, Dipartimento Fis & Osservatorio Astron, I-06100 Perugia, Italy

[10] Liverpool John Moores Univ, Astrophys Res Inst, Liverpool L3 5UX, Merseyside, England

[11] Ist Nazl Fis Nucl, I-38050 Trento, Italy

[12] IRST, ITC, I-38050 Trento, Italy

[13] European So Observ, D-85748 Garching, Germany

[14] Univ Valencia, Observ Astron, Valencia 46071, Spain

[15] Dunsink Observ, Dublin 15, Ireland

来源：

ASTRONOMY & ASTROPHYSICS | 2005年 / 443卷 / 03期

关键词：

galaxies : active; galaxies : BL lacertae objects : PKS 0537-441;

D O I：

10.1051/0004-6361:200500198

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Multiband VRIJHK photometry of the Blazar PKS 0537-441 obtained with the REM telescope from December 2004 to March 2005 is presented. A major period of activity is found with more than four magnitudes variability in the V filter in 50 days and of 2.5 in 10 days. In intensity and duration the activity is similar to that of 1972 reported by Eggen (1973, ApJ, 186, 1), but it is much better documented. No clear evidence of variability on time-scale of minutes is found. The spectral energy distribution is roughly described by a power-law, with the weaker roughly state being the softer.

引用

页码：L33 / L36

页数：4

共 25 条

[11] The 1997 outburst of BL lacertae and detection of a 0.6-mag rapid variation [J].