Zobrazeno 1 - 10
of 366
pro vyhledávání: '"Schartel N"'
Autor:
Ochmann, M. W., Kollatschny, W., Probst, M. A., Romero-Colmenero, E., Buckley, D. A. H., Chelouche, D., Chini, R., Grupe, D., Haas, M., Kaspi, S., Komossa, S., Parker, M. L., Santos-Lleo, M., Schartel, N., Famula, P.
Publikováno v:
A&A 686, A17 (2024)
NGC 1566 is known for exhibiting recurrent outbursts, which are accompanied by changes in spectral type. The most recent transient event occurred from 2017 to 2019 and was reported to be accompanied by a change in Seyfert classification from Seyfert
Externí odkaz:
http://arxiv.org/abs/2402.12054
Autor:
Xu, D. W., Komossa, S., Grupe, D., Wang, J., Xin, L. P., Han, X. H., Wei, J. Y., Bai, J. Y., Bon, E., Cangemi, F., Cordier, B., Dennefeld, M., Gallo, L. C., Kollatschny, W., Kong, De-Feng, Ochmann, M. W., Qiu, Y. L., Schartel, N.
We discuss applications of the study of the new and barely explored class of changing-look (CL) narrow-line Seyfert 1 (NLS1) galaxies and comment on their detection with the space mission SVOM (Space Variable Objects Monitor). We highlight the case o
Externí odkaz:
http://arxiv.org/abs/2401.10600
Autor:
Giustini, M., Hidalgo, P. Rodríguez, Reeves, J. N., Matzeu, G., Braito, V., Eracleous, M., Chartas, G., Schartel, N., Vignali, C., Hall, P. B., Waters, T., Ponti, G., Proga, D., Dadina, M., Cappi, M., Miniutti, G., de Vries, L.
Publikováno v:
A&A 679, A73 (2023)
Accretion disk winds launched close to supermassive black holes (SMBHs) are a viable mechanism to provide feedback between the SMBH and the host galaxy. We aim to characterize the X-ray properties of the inner accretion disk wind of the nearby active
Externí odkaz:
http://arxiv.org/abs/2306.05469
Autor:
Hodgkin, S. T., Harrison, D. L., Breedt, E., Wevers, T., Rixon, G., Delgado, A., Yoldas, A., Kostrzewa-Rutkowska, Z., Wyrzykowski, Ł., van Leeuwen, M., Blagorodnova, N., Campbell, H., Eappachen, D., Fraser, M., Ihanec, N., Koposov, S. E., Kruszyńska, K., Marton, G., Rybicki, K. A., Brown, A. G. A., Burgess, P. W., Busso, G., Cowell, S., De Angeli, F., Diener, C., Evans, D. W., Gilmore, G., Holland, G., Jonker, P. G., van Leeuwen, F., Mignard, F., Osborne, P. J., Portell, J., Prusti, T., Richards, P. J., Riello, M., Seabroke, G. M., Walton, N. A., Ábrahám, Péter, Altavilla, G., Baker, S. G., Bastian, U., O'Brien, P., de Bruijne, J., Butterley, T., Carrasco, J. M., Castañeda, J., Clark, J. S., Clementini, G., Copperwheat, C. M., Cropper, M., Damljanovic, G., Davidson, M., Davis, C. J., Dennefeld, M., Dhillon, V. S., Dolding, C., Dominik, M., Esquej, P., Eyer, L., Fabricius, C., Fridman, M., Froebrich, D., Garralda, N., Gomboc, A., González-Vidal, J. J., Guerra, R., Hambly, N. C., Hardy, L. K., Holl, B., Hourihane, A., Japelj, J., Kann, D. A., Kiss, C., Knigge, C., Kolb, U., Komossa, S., Kóspál, Á., Kovács, G., Kun, M., Leto, G., Lewis, F., Littlefair, S. P., Mahabal, A. A., Mundell, C. G., Nagy, Z., Padeletti, D., Palaversa, L., Pigulski, A., Pretorius, M. L., van Reeven, W., Ribeiro, V. A. R. M., Roelens, M., Rowell, N., Schartel, N., Scholz, A., Schwope, A., Sipőcz, B. M., Smartt, S. J., Smith, M. D., Serraller, I., Steeghs, D., Sullivan, M., Szabados, L., Szegedi-Elek, E., Tisserand, P., Tomasella, L., van Velzen, S., Whitelock, P. A, Wilson, R. W., Young, D. R.
Publikováno v:
A&A 652, A76 (2021)
Since July 2014, the Gaia mission has been engaged in a high-spatial-resolution, time-resolved, precise, accurate astrometric, and photometric survey of the entire sky. Aims: We present the Gaia Science Alerts project, which has been in operation sin
Externí odkaz:
http://arxiv.org/abs/2106.01394
We present results from a 20 ks XMM-Newton DDT observation of the radio-load quasar CFHQS J142952+544717 at z=6.18, whose extreme X-ray luminosity was recently revealed by the SRG/eROSITA telescope in the course of its first all-sky survey. The quasa
Externí odkaz:
http://arxiv.org/abs/2011.13724
Autor:
Parker, M. L., Matzeu, G. A., Alston, W. N., Fabian, A C., Lobban, A., Miniutti, G., Pinto, C., Santos-Lleó, M., Schartel, N.
We present joint NuSTAR and XMM-Newton observations of the bright, variable quasar IRAS 13349+2438. This combined dataset shows two clear iron absorption lines at 8 and 9 keV, which are most likely associated with two layers of mildly relativistic bl
Externí odkaz:
http://arxiv.org/abs/2008.05965
Autor:
Matzeu, G. A., Nardini, E., Parker, M. L., Reeves, J. N., Braito, V., Porquet, D., Middei, R., Kammoun, E., Lusso, E., Alston, W. N., Giustini, M., Lobban, A. P., Joyce, A. M., Igo, Z., Ebrero, J., Ballo, L., Santos-Lleó, M., Schartel, N.
We present joint \textit{XMM-Newton} and \textit{NuSTAR} observations of the `bare' narrow line Seyfert 1 Ton S180 ($z=0.062$), carried out in 2016 and providing the first hard X-ray view of this luminous galaxy. We find that the 0.4--30 keV band can
Externí odkaz:
http://arxiv.org/abs/2007.06575
Autor:
Kollatschny, W., Grupe, D., Parker, M. L., Ochmann, M. W., Schartel, N., Herwig, E., Komossa, S., Romero-Colmenero, E., Santos-Lleo, M.
Publikováno v:
A&A 638, A91 (2020)
We detected a very strong X-ray decline in the galaxy IRAS23226-3843 within the XMM-Newton slew survey in 2017. Subsequently, we carried out multi-band follow-up studies to investigate this fading galaxy in more detail. We took deep follow-up Swift,
Externí odkaz:
http://arxiv.org/abs/2004.01711
Autor:
Igo, Z., Parker, M. L., Matzeu, G. A., Alston, W., Crespo, N. Alvarez, Buisson, D. J. K., Fürst, F., Joyce, A. M., Mallick, L., Schartel, N., Santos-Lleó, M.
We present a qualitative search for ultra-fast outflows (UFOs) in excess variance spectra of radio-quiet active galactic nuclei (AGN). We analyse 42 sources from the Tombesi et al. (2010) spectroscopic UFO detection sample, and an additional 22 diffe
Externí odkaz:
http://arxiv.org/abs/2001.08208
Autor:
Parker, M. L., Longinotti, A. L., Schartel, N., Grupe, D., Komossa, S., Kriss, G., Fabian, A. C., Gallo, L., Harrison, F. A., Jiang, J., Kara, E., Krongold, Y., Matzeu, G. A., Pinto, C., Santos-Lleó, M.
We present XMM-Newton, NuSTAR, Swift and Hubble Space Telescope observations of the Narrow-line Seyfert 1 galaxy Mrk 335 in a protracted low state in 2018 and 2019. The X-ray flux is at the lowest level so far observed, and the extremely low continuu
Externí odkaz:
http://arxiv.org/abs/1909.04924