Access to Astronomical Catalogues

← Click to display the menu
J/A+A/603/A100      37 GHz observations of NLS1 galaxies   (Lahteenmaki+, 2017)

37 GHz observations of narrow-line Seyfert 1 galaxies. Lahteenmaki A., Jarvela E., Hovatta T., Tornikoski M., Harrison D.L., Lopez-Caniego M., Max-Moerbeck W., Mingaliev M., Pearson T.J., Ramakrishnan V., Readhead A.C.S., Reeves R.A., Richards J.L., Sotnikova Y., Tammi J. <Astron. Astrophys. 603, A100 (2017)> =2017A&A...603A.100L (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Galaxies, radio ; Galaxies, Seyfert Keywords: galaxies: active - galaxies: Seyfert Abstract: Observations performed at Metsahovi Radio Observatory at 37GHz are presented for a sample of 78 radio-loud and radio-quiet narrow-line Seyfert 1 (NLS1) galaxies, together with additional lower and higher frequency radio data from RATAN-600, Owens Valley Radio Observatory, and the Planck satellite. Most of the data have been gathered between February 2012 and April 2015 but for some sources even longer light curves exist. The detection rate at 37GHz is around 19%, which is comparable to other populations of active galactic nuclei presumed to be faint at radio frequencies, such as BL Lac objects. Variability and spectral indices are determined for sources with enough detections. Based on the radio data, many NLS1 galaxies show a blazar-like radio spectra exhibiting significant variability. The spectra at a given time are often inverted or convex. The source of the high-frequency radio emission in NLS1 galaxies, detected at 37GHz, is most probably a relativistic jet rather than star formation. Jets in NLS1 galaxies are therefore expected to be a much more common phenomenon than earlier assumed. Description: Multifrequency data of a sample of narrow-line Seyfert 1 galaxies. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 94 50 Metsahovi NLS1 sample 1: Basic data and statistics of the 37 GHz observations plus 5 studied sources table7.dat 55 567 Multifrequency data of our sample
See also: J/AJ/124/3042 : Narrow-line Seyfert 1 galaxies from SDSS EDR (Williams+, 2002) J/A+A/459/55 : Narrow-band imaging of 5 Seyfert-1 galaxies (Bennert+, 2006) J/AJ/131/1948 : Narrow line Seyfert 1 galaxies in the FBQS (Whalen+, 2006) J/AJ/132/321 : Morphology of narrow-line Seyfert 1 galaxies (Deo+, 2006) J/ApJS/166/128 : Narrow line Seyfert 1 galaxies from SDSS-DR3 (Zhou+, 2006) J/AJ/143/83 : Properties of a sample of Seyfert 1 galaxies (Xu+, 2012) J/A+A/573/A76 : Multifrequency study of NL Seyfert 1 galaxies (Jarvela+, 2015) J/A+A/575/A55 : Radio jet emission from GeV-emitting NLSy1 (Angelakis+, 2015) J/A+A/588/A146 : The gNLS1 galaxy PKS 2004-447. VLBI images (Schulz+, 2016) J/A+A/591/A88 : [OIII] of radio-emitting narrow-line Seyfert 1 (Berton+, 2016) J/A+A/596/A95 : Spectral nuclear properties of NLS1 galaxies (Schmidt+, 2016) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 23 A23 --- Source Source name 25- 29 F5.3 --- z Redshift 31- 32 I2 h RAh Right ascension (J2000) 34- 35 I2 min RAm Right ascension (J2000) 37- 41 F5.2 s RAs Right ascension (J2000) 43 A1 --- DE- Declination sign (J2000) 44- 45 I2 deg DEd Declination (J2000) 47- 48 I2 arcmin DEm Declination (J2000) 50- 54 F5.2 arcsec DEs Declination (J2000) 56- 57 I2 --- NDet ? Number of detections 58 A1 --- --- [/] 59- 61 I3 --- NObs ? Number of observations 64- 65 I2 % Det ? Detection percentage 67- 70 F4.2 Jy S37GHz ? Maximum 35GHz flux density 72- 76 F5.1 mJy S1.4GHz ? 1.4GHz flux density 78- 82 I5 --- RL ? Radio loudness from Jarvela et al. (2015, Cat. J/A+A/573/A76) 84 A1 --- r_RL Reference for RL if not Jarvela et al. (2015, Cat. J/A+A/573/A76) (1) 86- 88 F3.1 [Msun] logMBH ? Black hole mass from Foschini et al. (2015A&A...575A..13F) 90 A1 --- r_logMBH Reference for logMBH if not Foschini et al. (2015A&A...575A..13F) (1) 92- 94 I3 --- Nmeas ? Number of measurements in table7
Note (1): References as follows: 1 = Foschini (2011, in Narrow-Line Seyfert 1 Galaxies and their Place in the Universe, 24) 2 = Berton et al. (2015A&A...578A..28B) 3 = Jarvela et al. (2015, Cat. J/A+A/573/A76)
Byte-by-byte Description of file: table7.dat
Bytes Format Units Label Explanations
1- 23 A23 --- Source Source name 24 A1 --- Note [*] Note (1) 26- 30 F5.1 GHz Freq Frequency 32- 42 F11.6 yr Time Time of the observation 44- 47 F4.2 Jy Flux ?=- Flux density 49- 52 F4.2 Jy e_Flux ? Flux density error 54- 55 A2 --- n_Flux [nd] nd for non-detection
Note (1): * means that the time of the observation, the flux density and its error are averages of multiple observations.
Acknowledgements: Emilia Jarvela, emilia.jarvela(at)aalto.fi Aalto University Metsahovi Radio Observatory
(End) Emilia Jarvela [Aalto Univ.], Patricia Vannier [CDS] 25-Apr-2017
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

catalogue service

© UDS/CNRS

Contact