The ordinary life of the gamma-ray emitting narrow-line Seyfert 1 galaxy PKS 1502+036

Abstract

We report on multifrequency observations of the gamma-ray emitting narrow-line Seyfert 1 galaxy PKS 1502+036 performed from radio to gamma-rays during 2008 August-2012 November by Fermi-LAT, Swift (XRT and UVOT), OVRO, VLBA, and VLA. No significant variability has been observed in gamma-rays, with 0.1-100 GeV flux that ranged between (3-7)x10^-8 ph/cm^2/s using 3-month time bins. The photon index of the LAT spectrum (Gamma=2.60+/-0.06) and the apparent isotropic gamma-ray luminosity, L(0.1-100 GeV)= 7.8x10^45 erg/s, over 51 months are typical of a flat spectrum radio quasar. The radio spectral variability and the one-sided structure, in addition to the observed gamma-ray luminosity, suggest a relativistic jet with a high Doppler factor. In contrast to SBS 0846+513, the VLBA at 15 GHz did not observe superluminal motion for PKS 1502+036. Despite having the optical characteristics typical of a narrow-line Seyfert 1 galaxy, radio and gamma-ray properties of PKS 1502+036 are found to be similar to those of a blazar at the low end of the black hole mass distribution for blazars. This is in agreement with what has been found in the case of the other gamma-ray emitting narrow-line Seyfert 1 SBS 0846+513.

11 pages, 9 figures, 6 tables. MNRAS in press - Minor editing changes

References in corpus (10)

• Doppler factors, Lorentz factors and viewing angles for quasars, BL Lacertae objects and radio galaxies
• The 105 month Swift-BAT all-sky hard X-ray survey
• MOJAVE: Monitoring of Jets in AGN with VLBA Experiments. V. Multi-epoch VLBA Images
• Radio-loud Narrow-Line Type 1 Quasars
• A Population of Radio-loud Narrow Line Seyfert 1 Galaxies with Blazar-like Properties?
• Paper II: Calibration of the Swift ultraviolet/optical telescope
• The Host Galaxies of Narrow-Line Seyfert 1s: Nuclear Dust Morphology and Starburst Rings
• VLBA images of High Frequency Peakers
• Constraining the nature of High Frequency Peakers. I. The spectral variability
• Constraining the nature of High Frequency Peakers. II. Polarization properties

Cited by in corpus (31)

• MOJAVE XIII. Parsec-Scale AGN Jet Kinematics Analysis Based on 19 years of VLBA Observations at 15 GHz
• Properties of flat-spectrum radio-loud Narrow-Line Seyfert 1 Galaxies
• Radio jet emission from GeV-emitting narrow-line Seyfert 1 galaxies
• The Radio Properties of Radio-Loud Narrow-Line Seyfert 1 Galaxies on Parsec Scales
• The first gamma-ray detection of the narrow-line Seyfert 1 FBQS J1644+2619
• The host-galaxy of the gamma-ray Narrow-line Seyfert 1 galaxy 1H~0323+342
• Multifrequency studies of the narrow-line Seyfert 1 galaxy SBS 0846+513
• 37 GHz observations of narrow-line Seyfert 1 galaxies
• Investigating powerful jets in radio-loud Narrow Line Seyfert 1s
• The Gamma-Ray Emitting Radio-Loud Narrow-Line Seyfert 1 Galaxy PKS 2004-447 II. The Radio View
• Short-Term Radio Variability and Parsec-Scale Structure in a Gamma-Ray Narrow-Line Seyfert 1 Galaxy 1H 0323+342
• A Fanaroff-Riley Type I Candidate in Narrow-Line Seyfert 1 Galaxy Mrk 1239
• Intra-night optical variability characteristics of different classes of narrow line Seyfert 1 galaxies
• The Gamma-Ray Emitting Radio-Loud Narrow-Line Seyfert 1 Galaxy PKS 2004-447 I. The X-Ray View
• Multiwavelength observations of the gamma-ray emitting narrow-line Seyfert 1 PMN J0948+0022 in 2011
• Extreme Gaseous Outflows in Radio-Loud Narrow-Line Seyfert 1 Galaxies
• The host galaxy of the gamma-ray-emitting narrow-line Seyfert 1 galaxy PKS 1502+036
• The awakening of the gamma-ray narrow-Line Seyfert 1 galaxy PKS 1502+036
• Fermi Monitoring of Radio-loud Narrow Line Seyfert 1 Galaxies
• Rare finding of a 100 kpc large double-lobed radio galaxy hosted in the Narrow Line Seyfert 1 galaxy SDSS J103024.95+551622.7
• Intra-Night Optical monitoring of three γ-ray detected Narrow-line Seyfert 1 galaxies
• SDSSJ143244.91+301435.3 at VLBI: a compact radio galaxy in a narrow-line Seyfert 1
• A Radio Detection Survey of Narrow-Line Seyfert 1 Galaxies using Very-Long-Baseline Interferometry at 22 GHz
• Gamma-ray-emitting narrow-line Seyfert 1 galaxies: the Swift view
• A γ-ray emitting NLS1 galaxy SDSS J095909.51+460014.3 identified by multiwavelength contemporaneous brightening
• The radio structure of the $\gamma$-ray narrow-line Seyfert 1 galaxy SDSS J211852.96$-$073227.5
• Relativistic jets in narrow-line Seyfert 1 galaxies. New discoveries and open questions
• On the Hadronic Origin of High Energy Emission of $\gamma$-ray Loud Narrow-Line Seyfert 1 PKS 1502+036
• Gamma-ray emitting narrow-line Seyfert 1 galaxies. New discoveries and open questions
• A Panchromatic View of Relativistic Jets in Narrow-Line Seyfert 1 Galaxies
• Relativistic Jets in Gamma-Ray-Emitting Narrow-Line Seyfert 1 Galaxies