VISPA Publications in 2005

*Albert, I., Forth, J., *Armada, A., *Baixereas, C., *Bastieri, D., **Bednarek, W., *Bigongiari, C., *Biland, A., *Blanch, O., *Bock, R., *Bretx, T., *Chilingarian, A., *Coarasa, J., *Colombo, E., *Commichau, S., *Contreras, J., *Cortina, J., F. *Dazzi, De Angelis, *A., *De Lotto, B., *Domingo, C., *Domingo, E., *Dorner, D., *Frenec, *D., *Fernandez, E., *Flix, J., *Fonseca, V., *Font, L., *Galante, N., **Gaug, M., *Gebauer, J., *Giannitrapani, R., *Giller, M., *Goebel, *F., *Hengstebek, T., *Jacon, P., *de Jager, O., *Kalekin, O., *Lindfors, E., *Longo, F., *Lopez, M., *Lopez, J., *Lorenz, E., **Lucarelli, F., *Mannheim, K., *Mariotti, M., *Martinez, M., *Mase, *K., *Merck, M., *Meucci, M., *Mirzoyan, R., *Moralejo, A., **Ona-Wilhelmi, E., *Orduna, R., *Paneque, D., *Paoletti, R., Pasanen, *M., *Pascoli, D., *Pauss, F., *Pavel, N., *Pegna, R., *Peruzzo, L., *Piccioli, A., *Pin, M., *Pin, M., *Robert, A., *Saggion, A., *Sanchez, A., *Sartori, P., *Scalzotto, V., Sillanpää, A., *Sobczynska, D., *Stamerra, A., Takalo, L., *Teshima, M., *Tonello, *N., *Torres, A., *Turini, N., *Viertel, G., *Vitale, V., *Volkov, S., **Wagner, R., *Wittek, W. 2005: Physics with a ground-based gamma-ray *telescope of low-energy threshold. - Astroparticle Physics 23: *493-509

*Aungwerojwit, A., *Gänsicke, B.T., *Rodriquez-Gil, P., *Hagen, H.-J., *Harlaftis, E.T., *Papadimitriou, C., Lehto, H., *Araujo-Betancor, S., *Heber, U., *Fried, R.E., *Engels, D., Katajainen, S. 2005: HS 0139+0559, HS 0229+8016, HS 0506+7725, and HS 0642+5049: four new long-period cataclysmic variables. - Astronomy and Astrophysics 443 (3): 995-1005.

*Aungwerojwit, A., *Gänsicke, B.T., *Rodriquez-Gil, P., *Hagen, H.-J., *Harlaftis, E.T., *Papadimitriou, C., Lehto, H., *Fried, B., *Heber, U., *Engels, D. 2005: Three new long-period CVs from the Hamburg Quasar Survey. - In: Hameury J.-P. and Lasota, J.-P. The Astrophysics of Catalysmic Variables and Related Objects, ASPC 330, 469-470.

*Barklem, P.S., *Christlieb, N., *Beers, T.C., *Hill, V., *Bessell, M.S., Holmberg, J., *Marsteller, B., *Rossi, S., *Zickgraf, F.-J., *Reimers, D. 2005: The Hamburg/ESO R-process enhanced star survey (HERES). II. Spectroscopic analysis of the survey sample. - Astronomy and Astrophysics 439: 129 - 151.

*Barklem, P.S., *Christlieb, N., *Beers, T.C., *Hill, V., Holmberg, J., *Marsteller, B., *Rossi, S., *Zickgraf, F.-J., *Bessell, M.S. 2005: The Hamburg/ESO R-process Enhanced Star Survey (HERES): Abundances. - IAU Symposium 228: 201-206.

*Barrabes,E., Mikkola, S. 2005: Families of periodic horseshoe orbits in the restricted three-body problem. - Astronomy and Astrophysics 432: 1115-1129.

*Brandenburg A., *Klingenberg C., *Waagan K., *Bergene H., *Lin Y., *Motamed M., *Ramstad T. & Virtanen J. 2005: The reality of the compound solution in magnetohydrodynamics, in Eirola T., Havu V., Jauho A.-P. & v.Pfaler J. (eds.): Computational Problems in Physics 2005, Helsinki University of Technology, Inst. of Mathematics, Research Reports C018, pp. 61-69

*Butkevich, A.G., Berdyugin, A.V., Teerikorpi, P. 2005: The absolute magnitude of K0V stars from Hipparcos data using an analytical treatment of the Malmquist bias. - Astronomy and Astrophysics 435: 949-954.

*Butkevich, A.G., Berdyugin, A.V., Teerikorpi, P. 2005: Statistical biases in stellar astronomy: the Malmquist bias revisited. - Monthly Notices of Royal Astronomical Society 362: 321-330.

*Böttcher, M.; *Harvey, J.; *Joshi, M.; *Villata, M.; *Raiteri, C. M.; *Bramel, D.; *Mukherjee, R.; Savolainen, T.; *Cui, W.; *Fossati, G.; *Smith, I. A.; *Able, D.; *Aller, H. D.; *Aller, M. F.; *Arkharov, A. A.; *Augusteijn, T.; *Baliyan, K.; *Barnaby, D.; Berdyugin, A.; *Ben?tez, E.; *Boltwood, P.; *Carini, M.; *Carosati, D.; Ciprini, S.; *Coloma, J. M.; *Crapanzano, S.; *de Diego, J. A.; *Di Paola, A.; *Dolci, M.; Fan, J.; *Frasca, A.; *Hagen-Thorn, V.; *Horan, D.; *Ibrahimov, M.; *Kimeridze, G. N.; *Kovalev, Y. A.; *Kovalev, Y. Y.; *Kurtanidze, O.; *Lähteenmäki, A.; *Lanteri, L.; *Larionov, V. M.; *Larionova, E. G.; Lindfors, E.; *Marilli, E.; *Mirabal, N.; *Nikolashvili, M.; Nilsson, K.; *Ohlert, J. M.; *Ohnishi, T.; *Oksanen, A.; *Ostorero, L.; *Oyer, G.; *Papadakis, I.; Pasanen, M.; *Poteet, C.; *Pursimo, T.; *Sadakane, K.; *Sigua, L. A.; Takalo, L.; *Tartar, J. B.; *Teräsranta, H.; *Tosti, G.; *Walters, R.; Wiik, K.; *Wilking, B. A.; *Wills, W.; *Xilouris, E.; *Fletcher, A. B.; *Gu, M.; *Lee, C.-U.; *Pak, S.; *Yim, H.-S. 2005: Coordinated Multiwavelength Observation of 3C 66A during the WEBT Campaign of 2003-2004. - The Astrophysical Journal 631(1): 169-186.

*Chernin, A.D., *Karachentsev, I.D., Valtonen, M.J., *Dolgachev, V.P., *Domozhilova, L.M., *Makarov, D.I. 2005: The very local Hubble flow: Simulating transition from chaos to order.

*Christlieb, N., *Beers, T.C., *Thom, C., *Wilhelm, R., *Rossi, S., Flynn, C., *Wisotzki, L., *Reimers, D. 2005: Field horizontal-branch stars in the Galaxy (Christlieb+, 2005), Vizier Online Data Catalog 343: 10143.

*Christlieb, N., *Beers, T.C., *Thom, C., *Wilhelm, R., *Rossi, S., Flynn, C., *Wisotzki, L., *Reimers, D. 2005: The stellar content of the Hamburg/ESO survey. III. Field-horizontal-branch stars in the Galaxy. - Astronomy and Astrophysics 431: 143-148.

*Christlieb, N., *Beers, T.C., *Barklem, P.S., *Bessell, M.S., *Hill, V., Holmberg, J., *Korn, A.J., *Marsteller, B., *Mashonkina, L., *Rossi, S., *Zickgraf, F.-J., *Kratz, K.-L., *Nordström, B., *Pfeiffer, B., *Rhee, J., *Ryan, S.G. 2005: The Hamburg/ESO R-process Enhanced Star survey (HERES): Project Overwiew, and New r-II Stars, - IAU Symposium 228: 439-443.

*Dasso, S., *Mandrini, C.H., *Luoni, M.L., *Gulisano, A.M., *Nakwacki, M.S., Pohjolainen, S., *van Driel-Gesztelyi, L. , Demoulin, P. 2005: Linking coronal to heliospheric magnetic helicity: a new model-independent technique to compute helicity in magnetic clouds. - Proc. Solar Wind 11-SOHO 16 "Connecting Sun and Heliosphere", Whistler, Canada 12-17.6.2005, ESA SP-592: 605-608.

*D'Onghia, E., *Sommer-Larsen, J., *Romeo, A.D., *Burkert, A., *Pedersen, K., Portinari, L., *Rasmussen, J. 2005: The Formation of Fossil Galaxy Groups in the Hierarchical Universe. - Astrophysical Journal 630: L109-L112.

*Einasto, J., *Tago, E., *Einasto, M., *Saar, E., *Suhhonenko, I., Heinämäki, P., *Hütsi, G., *Tucker, D.L. 2005: Toward understanding environmental effects in SDSS cluster. - Astronomy & Astrophysics 439: 45-58.

*Einasto, M., *Suhhonenko, I., Heinämäki, P., *Einasto, J., *Saar, E. 2005: Environmental enhancement of DM haloes. - Astronomy & Astrophysics 436: 17-24.

*Falomo, R., Kotilainen, J.K., *Scarpa, R., *Treves, A. 2005: VLT adaptive optics imaging of QSO host galaxies and their close environment at z = 2.5: Results from a pilot program. - Astronomy and Astrophysics 434: 469-473.

*Falomo, R., Kotilainen, J., *Scarpa, R., *Treves, A. 2005: VLT adaptive optics imaging of QSO at z = 2.5. - In: Merloni, A., Nayakshin, S., Sunyaev, R.A. (eds.): Growing black holes: accretion in a cosmological context. ESO astrophysics symposia. Berlin: Springer, pp. 130-131.

*Fort, J. *Albert I.; *Armada, A.; *Baixeras, C.; *Bartko, H.; *Bastieri, D.; *Bednarek, W.; *Bigongiari, C.; *Biland, A.; *Bisesi, E.; *Blanch, O.; *Bock, R. K.; *Bretz, T.; *Chilingarian, A.; Ciprini, S.; *Commichau, S.; *Contreras, J. L.; *Cortina, J.; *Danielyan, V.; *Dazzi, F.; *de Angelis, A.; *de Lotto, B.; *Domingo, E.; *Dorner, D.; *Doro, M.; *Epler, O.; *Ferenc, D.; *Fernandez, E.; *Firpo, R.; *Flix, J.; *Fonseca, M. V.; *Font, L.; *Galante, N.; *Garczarczyk, M.; *Gaug, M.; *Gebauer, J.; *Giannitrapani, R.; *Giller, M.; *Goebel, F.; *Hengstebeck, T.; *Jacon, P.; *de Jager, O. C.; *Kalekin, O.; *Kranich, D.; *Laille, A.; *Lenisa, T.; Lindfors, E.; *Longo, F.; *López, M.; *López, J.; *Lorenz, E.; *Lucarelli, F.; *Mannheim, K.; *Mariotti, M.; *Martinez, M.; *Mase, K.; *Mazin, D.; *Merck, C.; *Merck, M.; *Meucci, M.; *Meyer, M.; *Mirzoyan, R.; *Mizobuchi, S.; *Moralejo, A.; *O?a-Wilhelmi, E.; *Ordu?a, R.; *Otte, N.; *Paneque, D.; *Paoletti, R.; Pasanen, M.; *Pascoli, D.; *Pauss, F.; *Pavel, N.; *Pegna, R.; *Peruzzo, L.; *Piccioli, A.; *Pin, M.; *de Los Reyes, R.; *Rico, J.; *Renker, D.; *Robert, A.; *Rossato, G.; *Saggion, A.; *Sanchez, A.; *Sartori, P.; *Scalzotto, V.; *Schweizer, T.; *Shayduk, M.; *Shinozaki, K.; Sillanpää, A.; *Sobczynska, D.; *Stamerra, A.; *Stark, L.; Takalo, L.; *Teshima, M.; *Tonello, N.; *Torres, A.; *Turini, N.; *Viertel, G.; *Vitale, V.; *Volkov, S.; *Wagner, R.; *Wibig, T.; *Wittek, W. 2005: Physics and astrophysics with a ground-based gamma-ray telescope of low energy threshold. - Astroparticle Physics 23(5): 493-509.

*Hagen.-Thorn., V.A E.I. *Hagen.-Thorn., E.I., Takalo, L.O., Sillanpää, A. 2005: Analysis of color variability of ON 231 in 1994 - 2002. - Astronomy Reports 49: 368-373.

Kanervo, E., Lehto, K., Ståhle, K., Lehto, H., Mäenpää, P. 2005: Characterization of growth and photosynthesis of Synechocystis sp. PCC 6803 cultures under reduced atmospheric pressures and enhanced CO2-levels. - International Journal of Astrobiology 4: 97-100.

Kotilainen, J.K., Hyvönen, T., *Falomo, R. 2005: The luminous host galaxies of high redshift BL Lac objects. - Astronomy and Astrophysics 440: 831-843.

Lehtinen, N.J., Pohjolainen, S., Valtonen, E., Huttunen-Heikinmaa, K., *Hillaris, A.E. 2005: Particle acceleration associated with interacting coronal mass ejections, 11th European Solar Physics Meeting. - ESA SP-600.

Lehtinen, N.J., Pohjolainen, S., *Karlicky, M., *Aurass, H., *Otruba, W. 2005: Non-thermal processes associated with rising structures and waves during a 'halo' type CME. - Astronomy & Astrophysics 442: 1049-1058.

Lindfors, E.J., Valtaoja, E., *Türler, M. 2005: SSC mechanism in the gamma-ray blazar 3C 279. - Astronomy and Astrophysics 440: 845-853.

*Maffei, P.; Ciprini, S.; *Tosti, G. 2005: Blue and infrared light curves of the mysterious pre-main-sequence star V582 Mon (KH 15D) from 1955 to 1970. - Monthly Notices of the Royal Astronomical Society 357(3): 1059-1067.

*Mandrini, C.H., Pohjolainen, S., *Dasso, S., *Green, L.M., *Demoulin, P., *van Driel-Gestzelyi, L., *Copperwheat, C., *Foley, C. 2005: Interplanetary flux rope ejected from an X-ray bright point. The smallest magnetic cloud source-region ever observed. - Astronomy and Astrophysics 434: 725-740.

Nurmi, P. 2005: Combining Gaia Windows: The Method and Simulations.-Astrophysics and Space Science 298(4): 559-575.

Nurmi, P. 2005: Galaxy Simulations of Visual Binary Stars. In: Turon, C., O'Flaherty, K.S., Perryman, M.A.C. (eds.): Proceedings of the Gaia Symposium "The Three-Dimensional Universe with Gaia" (ESA SP-576), pp. 463-466.

Nurmi, P. 2005: Observing Faint Binaries with Gaia. In: Turon, C., O'Flaherty, K.S., Perryman, M.A.C. (eds.): Proceedings of the Gaia Symposium "The Three-Dimensional Universe with Gaia" (ESA SP-576), pp. 461-462.

*Paturel, G., Teerikorpi, P. 2005: The extragalactic Cepheid Bias: significant influence on the cosmic distance scale. - Astronomy & Astrophysics 443: 883-889.

*Pian, E., *Foschini, L., *Beckmann, V., Sillanpää, A., *Soldi, S., *Tagliaferri, G., Takalo, L., *Barr, P., *Ghisellini, G., *Malaguti, G., *Maraschi, L., *Palumbo, G. G. C., *Treves, A., *Courvoisier, T. J.-L., *Di Cocco, G., *Gehrels, N., *Giommi, P., *Hudec, R., Lindfors, E., *Marcowith, A., Nilsson, K., Pasanen, M., *Pursimo, T., *Raiteri, C. M., *Savolainen, T., *Sikora, M., *Tornikoski, M., *Tosti, G., *Türler, M., Valtaoja, E., *Villata, M. & *Walter, R. 2005: INTEGRAL observations of the field of the BL Lacertae object S5 0716+716. Astronomy and Astrophysics 429: 427-431.

Piirola, V., Berdyugin, A., Mikkola, S., *Coyne, G.V. 2005: Polarimetric Study of the Massive Interacting Binary W Serpentis: Discovery of High-Latitute Scattering Spot/Jet. - Astrophysical Journal 632: 576 - 589.

Pohjolainen, S., *Vilmer, N., *Khan, J.I., *Hillaris, A.E. 2005: Early signatures of large-scale field line opening. Multi-wavelength analysis of features connected to a ´halo´ CME event. - Astronomy and Astrophysics 434: 329-341.

Portinari, L. 2005: The Initial Mass Function in disc galaxies and in galaxy clusters: the chemo-photometic picture. In: Proceedings of The Initial Mass Function 50 years later, eds. E. Corbelli, F. Palla, H. Zinnecker. - Astrophysics and Space Science Library (Dordrecht: Springer) 327: 215-220.

*Raiteri, C. M.; *Villata, M.; *Ibrahimov, M. A.; *Larionov, V. M.; *Kadler, M.; *Aller, H. D.; *Aller, M. F.; *Kovalev, Y. Y.; *Lanteri, L.; Nilsson, K.; *Papadakis, I. E.; *Pursimo, T.; *Romero, G. E.; *Teräsranta, H.; *Tornikoski, M.; *Arkharov, A. A.; *Barnaby, D.; Berdyugin, A.; *Böttcher, M.; *Byckling, K.; *Carini, M. T.; *Carosati, D.; *Cellone, S. A.; Ciprini, S.; *Combi, J. A.; *Crapanzano, S.; *Crowe, R.; *di Paola, A.; *Dolci, M.; *Fuhrmann, L.; Gu, M.; *Hagen-Thorn, V. A.; *Hakala, P.; *Impellizzeri, V.; *Jorstad, S.; *Kerp, J.; *Kimeridze, G. N.; *Kovalev, Yu. A.; *Kraus, A.; *Krichbaum, T. P.; *Kurtanidze, O. M.; *Lähteenmäki, A.; Lindfors, E.; *Mingaliev, M. G.; *Nesci, R.; *Nikolashvili, M. G.; *Ohlert, J.; *Orio, M.; Ostorero, L.; Pasanen, M.; *Pati, A.; *Poteet, C.; *Ros, E.; *Ros, J. A.; *Shastri, P.; *Sigua, L. A.; Sillanpää, A.; *Smith, N.; Takalo, L. O.; *Tosti, G.; *Vasileva, A.; *Wagner, S. J.; *Walters, R.; *Webb, J. R.; *Wills, W.; *Witzel, A.; *Xilouris, E. 2005: "The WEBT campaign to observe AO 0235+16 in the 2003-2004 observing season. Results from radio-to-optical monitoring and XMM-Newton observations"; Astronomy and Astrophysics 438: 39-53.

Rekola, R., *Richer, M.G., *McCall, M.L., Valtonen, M.J., Kotilainen, J.K., Flynn, C. 2005: Distance to NGC 253 based on the planetary nebula luminosity function. - Monthly Notices of the Royal Astronomical Society 361: 330-336.

Rekola, R., *Jerjen, H., Flynn, C. 2005: New distances of unresolved dwarf elliptical galaxies in the vicinity of the Local Group. - Astronomy and Astrophysics 437: 823-835.

Rekola, R., Jerjen, H., Flynn, C. 2005: Charting the neighbourhood, IAU Colloq. 198: Near-fields cosmology with dwarf elliptical galaxies, pp. 376-377.

*Renda, A., *Gibson, B.K., *Mouhcine, M., *Ibata, R.A., *Kawata, D., Flynn, C., Brook, C.B. 2005: The stellar halo metallicity-luminosity relationship for spiral galaxies. - Monthly Notices of the Royal Astronomical Society 363: L16-20.

*Rodriquez-Gil, P., *Gäniscke, B.T., *Hagen, H.-J., *Nogami, D., *Torres, M.A.P., Lehto, H., *Aungwerojwit, A., *Littlefair, S., *Araujo-Betancor, S., *Engels, D. 2005: HS 0943+1404, a true intermeidate polar. - Astronomy and Astrophysics 440: 701-709.

*Romeo, A.D., *Sommer-Larsen, J., Portinari, L. 2005: Simulating galaxy clusters - II. Global star formation histories and the galaxy populations. - Montly Notices of the Royal Astronomical Society 361: 983-996.

*Sbarufatti, B., *Treves, A., *Falomo, R., *Heidt, J., Kotilainen, J., *Scarpa, R. 2005: ESO Very Large Telescope Optical Spectroscopy of BL Lacertae Objects. I. New Redshifts. - Astronomical Journal 129: 559 - 566.

*Sbarufatti, B., *Treves, A., *Falomo, R., *Heidt, J., Kotilainen, J.,*Scarpa, R. 2005: VLT optical spectroscopy of BL Lac objects. - In: Merloni, A., Nayakshin, S., Sunyaev, R.A. (eds.): Growing black holes: accretion in a cosmological context. ESO astrophysics symposia. Berlin: Springer, pp.140-141.

*Scarpa, R., *Falomo, R., Kotilainen, J.K., & *Treves, A. 2005: Resolving the host galaxies of quasars at z = 2.5 with VLT + NACO. - In: The Messenger 120: 40-41.

*Sommer-Larsen, J., *Romeo, A.D., Portinari, L. 2005: Simulating galaxy clusters - III. Properties of the intracluster stars. - Monthly Notices of Royal Astronomical Society 357: 478-488.

*Szell, A., *Merritt, D., Mikkola, S. 2005: Evolution of Binary Supermassive Black Holes via Chain Regularization. "Nonlinear Dynamics in Astronomy and Physics, A Workshop Dedicated to the Memory of Professor Henry E. Kandrup", ed. J. R. Buchler, S. T. Gottesman and M. E. Mahon. -Annals of the New York Academy of Sciences, 1045: 225-231.

Teerikorpi, P., *Chernin, A., *Baryshev, Yu. 2005: The quiescent local Hubble flow, pairwise velocity dispersion, and local tests in a ? = universe. - Astronomy & Astrophysics 440: 791-797.

*Thom, C., Flynn, C., *Bessell, M.S., Hänninen, J., *Beers, T.C., *Christlieb, N.J., *James, D., Holmberg, J., *Gibson, B.K. 2005: Kinematics of the Galactic halo from horizontal branch stars in the Hamburg/ESO survey. - Monthly Notices of the Royal Astronomical Society 360: 354-359.

Tähtinen, L., Pohjolainen, S. 2005: Aurinko - tähden tarina. - WSOY, ss. 152.

*Umbreit, S., *Burkert, A., *Henning, T., Mikkola, S., *Spurzem, R. 2005: The Decay of Accreting Triple Systems as Brown Dwarf Formation Scenario. -Astrophysical Journal 623: 940-951.

*Umbreit, S., *Burkert, A., *Henning, T., Mikkola, S., *Spurzem, R. 2005: Brown dwarfs from decaying accreting triple systems. - Memorie della Societa Astronomica Italiana 76: 217-222.

*Vainio R., Virtanen J.J.P., *Schlickeiser R. 2005: Alfven-wave transmission and test-particle acceleration in parallel relativistic shocks, Astronomy & Astrophysics 431: 7.

Valtonen, M., Karttunen, H. 2005: The Three-Body Problem. Cambridge University Press, UK. ISBN 0521852242., 348 p.

Valtonen, M., Mylläri, A., *Orlov, V., *Rubinov, A. 2005: Dynamics of rotating triple systems: statistical escape theory versus numerical simulations. - Montly Notices of Royal Astronomical Society 364(1), 91-98.

*Villar-Sbaffi, A., *St-Louis, N., *Moffat, A., Piirola, V. 2005: First Ever Polarimetric Detection of a Wind Interaction Region and a Misaligned Flattening of the Wind in the Wolf-Rayet Binary CQ Cephei. - Astrophysical Journal 623: 1092-1104.

Virtanen J.J.P.,*Vainio R. 2005: Stochastic Acceleration in Relativistic Parallel Shocks, Astrophysical Journal 621: 313-323.

Virtanen J.J.P.,*Vainio R. 2005: Particle acceleration in thick parallel shocks with large compression ratio, Astronomy & Astrophysics 439: 461-464.

Virtanen J.J.P.,*Vainio R. 2005: Stochastic Particle Acceleration in Relativistic Parallel Shocks, in. P. Chen, E. Bloom, G. Madejski, & V. Petrosian (eds.): The XXII Texas Symposium on Relativistic Astrophysics, Stanford University eConf C041213, 2526, pp. 1-10.

Virtanen J.J.P.,*Vainio R 2005: Acceleration of electrons in highly compressed modified shocks, in T. Bulik, B. Rudak & G. Madejski (eds.): Astrophysical sources of high energy particles and radiation, AIP conf. proc. 801, pp. 408-409.

Virtanen J.J.P.,*Vainio R 2005: Stochastic Particle Acceleration in Relativistic Parallel Shocks, in T. Bulik, B. Rudak & G. Madejski (eds.): Astrophysical sources of high energy particles and radiation, AIP conf. proc. 801, pp. 410-411.