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Multiwavelength monitoring of the enigmatic narrow -line Seyfert1 PMN J0948+0022 in 2009 March-July

journal contribution
posted on 2023-05-17, 05:38 authored by Abdo, AA, Ackermann, M, Ajello, M, Axelsson, M, Baldini, L, Ballet, J, Barbiellini, G, Bastieri, D, Baughman, BM, Bechtol, K, Bellazzini, R, Berenji, B, Bloom, ED, Bonamente, E, Borgland, AW, Bregeon, J, Brez, A, Brigida, M, Bruel, P, Burnett, TH, Caliandro, GA, Cameron, RA, Caraveo, PA, Casandjian, JM, Cavazzuti, E, Cecchi, C, Celik, O, Celotti, A, Chekhtman, A, Chiang, J, Ciprini, S, Claus, R, Cohen-Tanugi, J, Collmar, W, Conrad, J, Costamante, L, Cutini, S, de Angelis, A, de Palma, F, Do Couto e Silva, E, Drell, PS, Dumora, D, Farnier, C, Favuzzi, C, Fegan, SJ, Focke, WB, Fortin, P, Foschini, L, Frailis, M, Fuhrmann, L, Fukazawa, Y, Funk, S, Fusco, P, Gargano, F, Gehrels, N, Germani, S, Giglietto, N, Giordano, F, Giroletti, M, Glanzman, T, Godfrey, G, Grenier, IA, Grove, JE, Guillemot, L, Guiriec, S, Hanabata, Y, Hays, E, Hughes, RE, Jackson, MS, Johannesson, G, Johnson, AS, Kadler, M, Kamae, T, Katagiri, H, Kataoka, J, Kawai, N, Kerr, M, Knoedlseder, J, Kocian, ML, Kuss, M, Lande, J, Latronico, L, Longo, F, Loparco, F, Lott, B, Lovellette, MN, Lubrano, P, Madejski, GM, Makeev, A, Max-Moerbeck, W, Mazziotta, MN, McConville, W, McEnery, JE, McGlynn, S, Meurer, C, Michelson, PF, Mitthumsiri, W, Mizuno, T, Moiseev, AA, Monte, C, Monzani, ME, Morselli, A, Moskalenko, I, Nestoras, I, Nolan, PL, Norris, JP, Nuss, E, Ohsugi, T, Omodei, N, Orlando, E, Ormes, JF, Paneque, D, Parent, D, Pavildou, V, Pelassa, V, Pepe, M, Pesce-Rollins, M, Piron, F, Porter, TA, Raino, S, Rando, R, Razzano, M, Readhead, A, Reimer, O, Reposeur, T, Richards, JL, Rodriguez, AY, Roth, M, Ryde, F, Sadrozinski, HFW, Sanchez, D, Sander, A, Parkinson, PMS, Scargle, JD, Shaw, MS, Smith, PD, Spandre, G, Spinelli, P, Strickman, MS, Suson, DJ, Tagliaferri, G, Tajima, H, Takahashi, H, Tanaka, T, Thayer, JB, Thompson, DJ, Tibaldo, L, Tibolla, O, Torres, DF, Tosti, G, Tramacere, A, Uchiyama, Y, Usher, TL, Vasileiou, V, Vilchez, N, Vitale, V, Waite, AP, Wang, P, Wehrle, AE, Winer, BL, Wood, KS, Yilnen, T, Zensus, JA, Ziegler, M, Angelakis, E, Bailyn, C, Bignall, H, Blanchard, JM, Bonning, EW, Buxton, M, Canterna, R, Carraminana, A, Carrasco, L, Colomer, F, Doi, A, Ghisellini, G, Hauser, M, Hong, X, Isler, J, Kino, M, Kovalev, YY, Kovalev, YA, Krichbaum, TP, Kutyrev, A, Lahteenmaki, A, van Langevelde, HJ, Lister, ML, Macomb, D, Maraschi, L, Marchili, N, Nagai, H, Paragi, Z, Phillips, C, Pushkarev, AB, Recillas, E, Roming, P, Sekido, M, Stark, MA, Szomoru, A, Tammi, J, Tavecchio, F, Tornikoski, M, Tzioumis, A, Urry, CM, Wagner, S, Johnson, WW, Sgro, C, Thayer, JG
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.

History

Publication title

The Astrophysical Journal

Volume

707

Pagination

727-737

ISSN

0004-637X

Department/School

School of Natural Sciences

Publisher

Univ Chicago Press

Place of publication

1427 E 60Th St, Chicago, USA, Il, 60637-2954

Rights statement

http://www.press.uchicago.edu

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  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences

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    University Of Tasmania

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    Keywords

    galaxies: active – gamma rays: observations – infrared: galaxies – quasars: individual (PMN

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    In Copyright

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