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J/A+A/614/L1             NLS1 at 37GHz                      (Lahteenmaki+, 2018)

Radio jets and gamma-ray emission in radio-silent narrow-line Seyfert 1 galaxies. Lahteenmaki A., Jarvela E., Ramakrishnan V., Tornikoski M., Tammi J., Vera R.J.C., Chamani W. <Astron. Astrophys. 614, L1 (2018)> =2018A&A...614L...1L (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Galaxies, radio ; Galaxies, Seyfert Keywords: galaxies: active - galaxies: Seyfert - gamma rays: galaxies Abstract: We have detected six narrow-line Seyfert 1 (NLS1) galaxies at 37GHz that were previously classified as radio silent and two that were classified as radio quiet. These detections reveal the presumption that NLS1 galaxies labelled radio quiet or radio silent and hosted by spiral galaxies are unable to launch jets to be incorrect. The detections are a plausible indicator of the presence of a powerful, most likely relativistic jet because this intensity of emission at 37GHz cannot be explained by, for example, radiation from supernova remnants. Additionally, one of the detected NLS1 galaxies is a newly discovered source of gamma rays and three others are candidates for future detections. Description: 37GHz data of a sample of narrow-line Seyfert 1 galaxies. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 72 8 Basic data and statistics of 37GHz and gamma-ray observations nls1-37.dat 58 326 37 GHz data of our sample
See also: J/A+A/573/A76 : Multifrequency study of NL Seyfert 1 galaxies (Jarvela+, 2015) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 24 A24 --- Name Source name (SDSS JHHMMSS.ss+DDMMSS.s) 26- 30 F5.3 --- z Redshift 32- 35 F4.2 Jy S37GHzave Average 37GHz flux 37 A1 --- l_Sgamma Upper limit flag on Sgamma 38- 42 F5.2 10-9ph/cm2/s Sgamma gamma-ray flux 44- 47 F4.2 10-9ph/cm2/s e_Sgamma ? rms uncertainty on Sgamma 49- 50 I2 --- TS ?=- Maximum-likelihood test statistic on the gamma-ray emission detection 51 A1 --- n_TS [b] b for detection and candidates 53- 64 A12 --- LSE Large-scale environment 66- 69 F4.2 [Msun] logMBH Black hale mass (1) 71- 72 I2 --- RL ?=- Radio source loudness (2)
Note (1): Black hole mass from Jarvela et al. (2015, Cat. J/A+A/573/A76) for the radio-quiet sources or estimated as described in appendix C for the radio-silent sources. Note (2): Radio source loudness from Jarvela et al. (2015, Cat. J/A+A/573/A76).
Byte-by-byte Description of file: nls1-37.dat
Bytes Format Units Label Explanations
1- 24 A24 --- Name Source name (SDSS JHHMMSS.ss+DDMMSS.s) 26- 29 F4.1 GHz Freq Frequency 31- 41 F11.6 yr Time Time of the observation in decimal years 43- 46 F4.2 Jy Flux ? Flux density (1) 48- 51 F4.2 Jy e_Flux ? Flux density error 52- 53 A2 --- n_Flux [nd] nd for non-detection 55- 58 F4.2 Jy lFlux ? Flux upper limit
Note (1): no value means a non-detection.
Acknowledgements: Emilia Jarvela, emilia.jarvela(at)aalto.fi Aalto University Metsahovi Radio Observatory
(End) Emilia Jarvela [AUMRO], Patricia Vannier [CDS] 28-May-2018
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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