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The Extreme Behavior of the Radio-loud Narrow-line Seyfert 1 Galaxy J0849+5108

Maune, Jeremy D. and Eggen, Joseph R. and Miller, H. Richard and Marshall, Kevin and Readhead, Anthony C. S. and Hovatta, Talvikki and King, Oliver (2014) The Extreme Behavior of the Radio-loud Narrow-line Seyfert 1 Galaxy J0849+5108. Astrophysical Journal, 794 (1). Art. No. 93. ISSN 0004-637X. doi:10.1088/0004-637X/794/1/93.

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Simultaneous radio, optical (both photometry and polarimetry), X-ray, and γ-ray observations of the radio-loud narrow-line Seyfert 1 (RL-NLSy1) galaxy J0849+5108 are presented. A massive three-magnitude optical flare across five nights in 2013 April is detected, along with associated flux increases in the γ-ray, infrared, and radio regimes; no comparable event was detected in the X-rays, though this may be due to poor coverage. A spectral energy distribution (SED) for the object using quasi-simultaneous data centered on the optical flare is compared to the previously published SEDs for the object by D'Ammando et al. The flare event coincided with a high degree of optical polarization. High amplitude optical microvariability is clearly detected, and is found to be of comparable amplitude when the object is observed in both faint and bright states. The object is also seen to undergo rapid shifts in polarization in both degree and electric vector position angle within a single night. J0849+5108 appears to show even more extreme variability than that previously reported for the similar object J0948+0022. These observations appear to support the growing claim that some RL-NLSy1 galaxies constitute a sub-class of blazar-like active galactic nuclei.

Item Type:Article
Related URLs:
URLURL TypeDescription
Readhead, Anthony C. S.0000-0001-9152-961X
Hovatta, Talvikki0000-0002-2024-8199
Additional Information:© 2014 The American Astronomical Society. Received 2013 September 18; accepted 2014 August 18; published 2014 September 25. The authors acknowledge the staff at Lowell Observatory for the hard work and support that made this research possible. We also thank Svetlana Jorstad of the Institute for Astrophysical Research at Boston University for her helpful commentary and observations. This work was funded by the PEGA RPE grant at Georgia State University.
Funding AgencyGrant Number
Georgia State UniversityUNSPECIFIED
Subject Keywords:galaxies: active; galaxies: individual (J0849+5108); galaxies: photometry; gamma rays: galaxies; polarization; radio continuum: galaxies
Issue or Number:1
Record Number:CaltechAUTHORS:20141110-094015927
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Official Citation:The Extreme Behavior of the Radio-loud Narrow-line Seyfert 1 Galaxy J0849+5108 Jeremy D. Maune et al. 2014 ApJ 794 93
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51490
Deposited By: Tony Diaz
Deposited On:10 Nov 2014 17:51
Last Modified:10 Nov 2021 19:11

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