A Caltech Library Service

Multiwavelength Monitoring of the Enigmatic Narrow-Line Seyfert 1 PMN J0948+0022 in 2009 March-July

Abdo, A. A. and Ackermann, M. and Ajello, M. and Axelsson, M. and Baldini, L. and Ballet, J. and Barbiellini, G. and Bastieri, D. and Baughman, B. M. and Bechtol, K. and Bellazzini, R. and Berenji, B. and Bloom, E. D. and Bonamente, E. and Borgland, A. W. and Bregeon, J. and Brez, A. and Brigida, M. and Bruel, P. and Burnett, T. H. and Caliandro, G. A. and Cameron, R. A. and Caraveo, P. A. and Casandjian, J. M. and Cavazzuti, E. and Cecchi, C. and Çelik, Ö. and Celotti, A. and Chekhtman, A. and Chiang, J. and Ciprini, S. and Claus, R. and Cohen-Tanugi, J. and Collmar, W. and Conrad, J and Costamante, L. and Cutini, S. and De Angels, A. and De Palma, F. and Do Couto e Silva, E. and Drell, P. S. and Dumora, D. and Farnier, C. and Favuzzi, C. and Fegan, S. J. and Focke, W. B. and Fortini, P. and Foschini, L. and Frailis, M. and Fuhrmann, L. and Fukazawa, Y. and Funk, S. and Fusco, P. and Gargano, F. and Gehrels, N. and Germani, S. and Giglietto, N. and Giordano, F. and Giroletti, M. and Glanzman, T. and Godfrey, G. and Grenier, I. A. and Grove, J. E. and Guillemot, L. and Guiriec, S. and Hanabata, Y. and Hays, E. and Hughes, R. E. and Jackson, M. S. and Jόhannesson, G. and Johnson, A. S. and Johnson, W. N. and Kadler, M. and Kamae, T. and Katagiri, H and Kataoka, J. and Kawai, N. and Kerr, M. and Knödlseder, J. and Kocian, M. L. and Kuss, M. and Lande, J. and Latronico, L. and Longo, F. and Loparco, F. and Lott, B. and Lovellette, M. N. and Lubrano, P. and Madejski, G. M. and Makeev, A. and Max-Moerbeck, W. and Mazziotta, M. N. and McConville, W. and McEnergy, J. E. and McGlynn, S. and Meurer, C. and Michelson, P. F. and Mitthumsiri, W. and Mizuno, T. and Moiseev, A. A. and Monte, C. and Monzani, M. E. and Morselli, A. and Moskalenko, I. V. and Nestoras, I. and Nolan, P. L. and Norris, J. P. and Nuss, E. and Ohsugi, T. and Omodei, N. and Orlando, E. and Ormes, J. F. and Paneque, D. and Parent, D. and Pavlidou, V. and Pelassa, V. and Pepe, M. and Pesce-Rollins, M. and Piron, F. and Porter, T. A. and Rainò, S. and Rando, R. and Razzano, M. and Readhead, A. and Reimer, O. and Reposeur, T. and Richards, J. L. and Rodriguez, A. Y. and Roth, M. and Ryde, F. and Sadrozinski, H. F. -W. and Sanchez, D. and Sander, A. and Saz-Parkinson, P. M. and Scargle, J. D. and Sgrò, C. and Shaw, M. S. and Smith, P. D. and Spandre, G. and Spinelli, P. and Strickman, M. S. and Suson, D. J. and Tagliaferri, G. and Tajima, H. and Takahashi, H. and Tanaka, T. and Thayer, J. B. and Thayer, J. G. and Thompson, D. J. and Tibaldo, L. and Tibolla, O. and Torres, D. F. and Tosti, G. and Tramacere, A. and Uchiyama, Y. and Usher, T. L. and Vasileiou, V. and Vilchez, N. and Vitale, V. and Waite, A. P. and Wang, P. and Wehrle, A. E. and Winer, B. L. and Wood, K. S. and Ylinen, T. and Zensus, J. A. and Ziegler, M. and Angelakis, E. and Bailyn, C. and Bignall, H. and Blanchard, J. and Bonning, E. W. and Buxton, M. and Canterna, R. and Carramiñana, A. and Carrasco, L. and Colomer, F. and Doi, A. and Ghisellini, G. and Hauser, M. and Hong, X. and Isler, J. and Kino, M. and Kovalev, Y. Y. and Kovalev, Yu A. and Krichbaum, T. P. and Kutyrev, A. and Lähteenmäki, A. and van Langevelde, H. J. and Lister, M. L. and Macomb, D. and Maraschi, L. and Marchili, N. and Nagai, H. and Paragi, Z. and Phillips, C. and Pushkarev, A. B. and Recillas, E. and Roming, P. and Sekido, M. and Stark, M. A. and Szomoru, A. and Tammi, J. and Tavecchio, F. and Tornikoski, M. and Tzioumis, A. K. and Urry, C. M. and Wagner, S. (2009) Multiwavelength Monitoring of the Enigmatic Narrow-Line Seyfert 1 PMN J0948+0022 in 2009 March-July. Astrophysical Journal, 707 (1). pp. 727-737. ISSN 0004-637X.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


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.

Item Type:Article
Related URLs:
URLURL TypeDescription
Kutyrev, A.0000-0002-2715-8460
Urry, C. M.0000-0002-0745-9792
Additional Information:© 2009 American Astronomical Society. Print publication: Issue 1 (2009 December 10). Received 2009 September 11, accepted for publication 2009 October 26. Published 2009 November 25. The Fermi LAT Collaboration acknowledges generous ongoing support from a number of agencies and institutes that have supported both the development and the operation of the LAT as well as scientific data analysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States, the Commissariat à l’Energie Atomique and the Centre National de la Recherche Scientifique/Institut National de Physique Nucléaire et de Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Research Organization (KEK) and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K. A.Wallenberg Foundation, the Swedish Research Council and the Swedish National Space Board in Sweden. Additional support for science analysis during the operations phase is gratefully acknowledged from the Istituto Nazionale di Astrofisica in Italy and the Centre National d’ Études Spatiales in France. This work is sponsored at PSU by NASA contract NAS5- 00136. The SMARTS observations were supported by Cycle 1 Fermi GI grant number 011283. The Metsähovi team acknowledges the support from the Academy of Finland. e-VLBI developments in Europe are supported by the EC DG-INFSO funded Communication Network Developments project “EXPReS,” Contract No. 02662. The European VLBI Network is a joint facility of European, Chinese, South African, and other radio astronomy institutes funded by their national research councils. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. RATAN-600 observations are supported in part by the Russian Foundation for Basic Research (projects 01-02-16812 and 08-02-00545). This research has made use of data from the MOJAVE database that is maintained by the MOJAVE team (Lister et al. 2009). The MOJAVE project is supported under National Science Foundation grant 0807860-AST and NASA-Fermi grant NNX08AV67G. Also based on observations with the 100 m telescope of the Max-Planck-Institut für Radioastronomie (MPIfR) at Effelsberg. M.H. and S.W. acknowledge financial support through SFB 439 and BMBF/PT-DESY. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration and of data obtained from the High Energy Astrophysics Science Archive Research Center (HEASARC), provided by NASA’s Goddard Space Flight Center. Facilities: ATOM (LSW), Effelsberg (F-GAMMA), e-VLBI (EVN, LBA), Fermi, G. Haro (INAOE), Metsähovi, OVRO, RATAN-600, Swift, SMARTS (Yale), VLBA (MOJAVE), WIRO.
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Commissariat à l’Energie Atomique (CEA)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Agenzia Spaziale Italiana (ASI)UNSPECIFIED
Istituto Nazionale di Fisica Nucleare (INFN)UNSPECIFIED
Ministry of Education, Culture, Sports, Science and Technology (MEXT)UNSPECIFIED
High Energy Accelerator Research Organization (KEK)UNSPECIFIED
Japan Aerospace Exploration Agency (JAXA)UNSPECIFIED
K. A.Wallenberg FoundationUNSPECIFIED
Swedish Research Council UNSPECIFIED
Swedish National Space BoardUNSPECIFIED
Istituto Nazionale di Astrofisica (INAF)UNSPECIFIED
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Pennsylvania State UniversityUNSPECIFIED
NASANAS5- 00136
Cycle 1 Fermi GI011283
Academy of FinlandUNSPECIFIED
EC DG-INFSO funded Communication Network Developments project “EXPReS02662
Russian Foundation for Basic Research01-02-16812
Russian Foundation for Basic Research08-02-00545
Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)UNSPECIFIED
Subject Keywords:galaxies: active; gamma rays: observations; infrared: galaxies; quasars: individual (PMN J0948+0022); radio continuum: galaxies; ultraviolet: galaxies; X-rays: galaxies
Record Number:CaltechAUTHORS:20100111-135240596
Persistent URL:
Official Citation: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. Burnett, G. 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 (The Fermi/LAT Collaboration), E. Angelakis, C. Bailyn, H. Bignall, J. Blanchard, E. W. Bonning, M. Buxton, R. Canterna, A. Carramiñana, 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, and S. Wagner 2009 ApJ 707 727-737 doi: 10.1088/0004-637X/707/1/727
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:17135
Deposited By: Ruth Sustaita
Deposited On:25 Jan 2010 19:06
Last Modified:27 Oct 2017 22:25

Repository Staff Only: item control page