Multiwavelength monitoring of the enigmatic narrow-line seyfert 1 PMN J0948+0022 in 2009 march-july

A. A. Abdo, M. Ackermann, M. Ajello, M. Axelsson, L. Baldini, J. Ballet, G. Barbiellini, D. Bastieri, B. M. Baughman, K. Bechtol, R. Bellazzini, B. Berenji, E. D. Bloom, E. Bonamente, A. W. Borgland, J. Bregeon, A. Brez, M. Brigida, P. Bruel, T. H. BurnettG. A. Caliandro, R. A. Cameron, P. A. Caraveo, J. M. Casandjian, E. Cavazzuti, C. Cecchi, Ö Çelik, A. Celotti, A. Chekhtman, J. Chiang, S. Ciprini, R. Claus, J. Cohen-Tanugi, W. Collmar, J. Conrad, L. Costamante, S. Cutini, A. De Angelis, F. De Palma, E. Do Couto E Silva, P. S. Drell, D. Dumora, C. Farnier, C. Favuzzi, S. J. Fegan, W. B. Focke, P. Fortin, L. Foschini, M. Frailis, L. Fuhrmann, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, N. Gehrels, S. Germani, N. Giglietto, F. Giordano, M. Giroletti, T. Glanzman, G. Godfrey, I. A. Grenier, J. E. Grove, L. Guillemot, S. Guiriec, Y. Hanabata, E. Hays, R. E. Hughes, M. S. Jackson, G. Jóhannesson, A. S. Johnson, W. N. Johnson, M. Kadler, T. Kamae, H. Katagiri, J. Kataoka, N. Kawai, M. Kerr, J. Knödlseder, M. L. Kocian, M. Kuss, J. Lande, L. Latronico, F. Longo, F. Loparco, B. Lott, M. N. Lovellette, P. Lubrano, G. M. Madejski, A. Makeev, W. Max-Moerbeck, M. N. Mazziotta, W. McConville, J. E. McEnery, S. McGlynn, C. Meurer, P. F. Michelson, W. Mitthumsiri, T. Mizuno, A. A. Moiseev, C. Monte, M. E. Monzani, A. Morselli, I. V. Moskalenko, I. Nestoras, P. L. Nolan, J. P. Norris, E. Nuss, T. Ohsugi, N. Omodei, E. Orlando, J. F. Ormes, D. Paneque, D. Parent, V. Pavlidou, V. Pelassa, M. Pepe, M. Pesce-Rollins, F. Piron, T. A. Porter, S. Rainò, R. Rando, M. Razzano, A. Readhead, O. Reimer, T. Reposeur, J. L. Richards, A. Y. Rodriguez, M. Roth, F. Ryde, H. F.W. Sadrozinski, D. Sanchez, A. Sander, P. M. Saz Parkinson, J. D. Scargle, C. Sgrò, M. S. Shaw, P. D. Smith, G. Spandre, P. Spinelli, M. S. Strickman, D. J. Suson, G. Tagliaferri, H. Tajima, H. Takahashi, T. Tanaka, J. B. Thayer, J. G. Thayer, D. J. Thompson, L. Tibaldo, O. Tibolla, D. F. Torres, G. Tosti, A. Tramacere, Y. Uchiyama, T. L. Usher, V. Vasileiou, N. Vilchez, V. Vitale, A. P. Waite, P. Wang, A. E. Wehrle, B. L. Winer, K. S. Wood, T. Ylinen, J. A. Zensus, M. Ziegler, E. Angelakis, C. Bailyn, H. Bignall, J. Blanchard, E. W. Bonning, M. Buxton, R. Canterna, A. Carramĩana, L. Carrasco, F. Colomer, A. Doi, G. Ghisellini, M. Hauser, X. Hong, J. Isler, M. Kino, Y. Y. Kovalev, Yu A. Kovalev, T. P. Krichbaum, A. Kutyrev, A. Lahteenmaki, H. J. Van Langevelde, M. L. Lister, D. MacOmb, L. Maraschi, N. Marchili, H. Nagai, Z. Paragi, C. Phillips, A. B. Pushkarev, E. Recillas, P. Roming, M. Sekido, M. A. Stark, A. Szomoru, J. Tammi, F. Tavecchio, M. Tornikoski, A. K. Tzioumis, C. M. Urry, S. Wagner

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

Following the recent discovery of γ rays from the radio-loud narrow-line Seyfert 1 galaxy PMN J0948+0022 (z = 0.5846), we started a multiwavelength campaign from radio to γ rays, which was carried out between the end of 2009 March and the beginning of July. The source displayed activity at all the observed wavelengths: a general decreasing trend from optical to γ-ray frequencies was followed by an increase of radio emission after less than two months from the peak of the γ-ray emission. The largest flux change, about a factor of about 4, occurred in the X-ray band. The smallest was at ultraviolet and near-infrared frequencies, where the rate of the detected photons dropped by a factor 1.6-1.9. At optical wavelengths, where the sampling rate was the highest, it was possible to observe day scale variability, with flux variations up to a factor of about 3. The behavior of PMN J0948+0022 observed in this campaign and the calculated power carried out by its jet in the form of protons, electrons, radiation, and magnetic field are quite similar to that of blazars, specifically of flat-spectrum radio quasars. These results confirm the idea that radio-loud narrow-line Seyfert 1 galaxies host relativistic jets with power similar to that of average blazars.

Original languageEnglish
Pages (from-to)727-737
Number of pages11
JournalAstrophysical Journal
Volume707
Issue number1
DOIs
Publication statusPublished - 2009 Jan 1

    Fingerprint

Keywords

  • Gamma rays: observations

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Abdo, A. A., Ackermann, M., Ajello, M., Axelsson, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Baughman, B. M., Bechtol, K., Bellazzini, R., Berenji, B., Bloom, E. D., Bonamente, E., Borgland, A. W., Bregeon, J., Brez, A., Brigida, M., Bruel, P., ... Wagner, S. (2009). Multiwavelength monitoring of the enigmatic narrow-line seyfert 1 PMN J0948+0022 in 2009 march-july. Astrophysical Journal, 707(1), 727-737. https://doi.org/10.1088/0004-637X/707/1/727