Zobrazeno 1 - 10
of 272
pro vyhledávání: '"Ochmann M"'
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:
Kollatschny, W., Meusinger, H., Hoeft, M., Hill, G. J., Ochmann, M. W., Zeimann, G., Froebrich, D., Bhagat, S.
Publikováno v:
A&A 652, A24 (2021)
The steep spectrum radio source VLSSJ2217.5+5943 shows a complex, filamentary morphology and a curved spectrum. Therefore, the source has previously been classified as a radio phoenix. However, no galaxy cluster associated with this radio source has
Externí odkaz:
http://arxiv.org/abs/2105.07714
Autor:
Rath, A., Kieninger, B., Fritsch, J., Caplunik-Pratsch, A., Blaas, S., Ochmann, M., Pfeifer, M., Hartl, J., Holzmann, T., Schneider-Brachert, W.
Publikováno v:
In Journal of Hospital Infection March 2024 145:155-164
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:
Kollatschny, W., Weilbacher, P. M., Ochmann, M. W., Chelouche, D., Monreal-Ibero, A., Bacon, R., Contini, T.
Publikováno v:
A&A 633, A79 (2020)
NGC6240 is a well-studied nearby galaxy system in the process of merging. Based on optical, X-ray, and radio observations, it is thought to harbor two active nuclei We carried out a detailed optical 3D spectroscopic study to investigate the inner reg
Externí odkaz:
http://arxiv.org/abs/1910.12813
Autor:
Kollatschny, W., Ochmann, M. W., Zetzl, M., Haas, M., Chelouche, D., Kaspi, S., Nunez, F. Pozo, Grupe, D.
Publikováno v:
A&A 619, A168 (2018)
A strong X-ray outburst was detected in HE1136-2304 in 2014. Accompanying optical spectra revealed that the spectral type has changed from a nearly Seyfert 2 type (1.95), classified by spectra taken 10 and 20 years ago, to a Seyfert 1.5 in our most r
Externí odkaz:
http://arxiv.org/abs/1808.07331
Autor:
Zetzl, M., Kollatschny, W., Ochmann, M. W., Grupe, D., Haas, M., Ramolla, M., Chelouche, D., Kaspi, S., Schartel, N.
Publikováno v:
A&A 618, A83 (2018)
A strong outburst in the X-ray continuum and a change of its Seyfert spectral type was detected in HE 1136-2304 in 2014. The spectral type changed from nearly Seyfert 2 type (1.95) to Seyfert 1.5 type in comparison to previous observations taken ten
Externí odkaz:
http://arxiv.org/abs/1804.05911
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Akademický článek
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