Zobrazeno 1 - 10
of 1 634
pro vyhledávání: '"Vestergaard, M."'
Autor:
Kilerci Eser, Ece, Vestergaard, M.
We present and analyse quasi-simultaneous multi-epoch spectral energy distributions (SEDs) of seven reverberation-mapped active galactic nuclei (AGNs) for which accurate black hole mass measurements and suitable archival data are available from the '
Externí odkaz:
http://hdl.handle.net/10150/627136
http://arizona.openrepository.com/arizona/handle/10150/627136
http://arizona.openrepository.com/arizona/handle/10150/627136
Autor:
Christensen, L., Vergani, S. D., Schulze, S., Annau, N., Selsing, J., Fynbo, J. P. U., de Ugarte Postigo, A., Cañameras, R., Lopez, S., Passi, D., Cortés-Zuleta, P., Ellison, S. L., D’Odorico, V., Becker, G., Berg, T. A. M., Cano, Z., Covino, S., Cupani, G., D’Elia, V., Goldoni, P., Gomboc, A., Hammer, F., Heintz, K. E., Jakobsson, P., Japelj, J., Kaper, L., Malesani, D., Møller, P., Petitjean, P., Pugliese, V., Sánchez-Ramírez, R., Tanvir, N. R., Thöne, C. C., Vestergaard, M., Wiersema, K., Worseck, G.
Previous studies have shown that the incidence rate of intervening strong Mg II absorbers towards gamma-ray bursts (GRBs) were a factor of 2-4 higher than towards quasars. Exploring the similar sized and uniformly selected legacy data sets XQ-100 and
Externí odkaz:
http://hdl.handle.net/10150/626409
http://arizona.openrepository.com/arizona/handle/10150/626409
http://arizona.openrepository.com/arizona/handle/10150/626409
We present the Swift optical to X-ray spectral energy distributions (SEDs) of 44 quasars at redshifts z approximate to 2 observed by Swift, part of a larger program to establish and characterize the optical through X-ray SEDs of moderate-redshift qua
Externí odkaz:
http://hdl.handle.net/10150/623803
http://arizona.openrepository.com/arizona/handle/10150/623803
http://arizona.openrepository.com/arizona/handle/10150/623803
Autor:
Edelson, R., Gelbord, J., Cackett, E., Connolly, S., Done, C., Fausnaugh, M., Gardner, E., Gehrels, N., Goad, M., Horne, K., McHardy, I., Peterson, B. M., Vaughan, S., Vestergaard, M., Breeveld, A., Barth, A. J., Bentz, M., Bottorff, M., Brandt, W. N., Crawford, S. M., Bonta, E. Dalla, Emmanoulopoulos, D., Evans, P., Jaimes, R. Figuera, Filippenko, A. V., Ferland, G., Grupe, D., Joner, M., Kennea, J., Korista, K. T., Krimm, H. A., Kriss, G., Leonard, D. C., Mathur, S., Netzer, H., Nousek, J., Page, K., Romero-Colmenero, E., Siegel, M., Starkey, D. A., Treu, T., Vogler, H. A., Winkler, H., Zheng, W.
Swift monitoring of NGC 4151 with an similar to 6 hr sampling over a total of 69 days in early 2016 is used to construct light curves covering five bands in the X-rays (0.3-50 keV) and six in the ultraviolet (UV)/optical (1900-5500 angstrom). The thr
Externí odkaz:
http://hdl.handle.net/10150/624341
http://arizona.openrepository.com/arizona/handle/10150/624341
http://arizona.openrepository.com/arizona/handle/10150/624341
SPACE TELESCOPE AND OPTICAL REVERBERATION MAPPING PROJECT.VI. REVERBERATING DISK MODELS FOR NGC 5548
Autor:
Starkey, D., Horne, Keith, Fausnaugh, M. M., Peterson, B. M., Bentz, M. C., Kochanek, C. S., Denney, K. D., Edelson, R., Goad, M. R., Rosa, G. De, Anderson, M. D., Arévalo, P., Barth, A. J., Bazhaw, C., Borman, G. A., Boroson, T. A., Bottorff, M. C., Brandt, W. N., Breeveld, A. A., Cackett, E. M., Carini, M. T., Croxall, K. V., Crenshaw, D. M., Bontà, E. Dalla, Lorenzo-Cáceres, A. De, Dietrich, M., Efimova, N. V., Ely, J., Evans, P. A., Filippenko, A. V., Flatland, K., Gehrels, N., Geier, S., Gelbord, J. M., Gonzalez, L., Gorjian, V., Grier, C. J., Grupe, D., Hall, P. B., Hicks, S., Horenstein, D., Hutchison, T., Im, M., Jensen, J. J., Joner, M. D., Jones, J., Kaastra, J., Kaspi, S., Kelly, B. C., Kennea, J. A., Kim, S. C., Kim, M., Klimanov, S. A., Korista, K. T., Kriss, G. A., Lee, J. C., Leonard, D. C., Lira, P., MacInnis, F., Manne-Nicholas, E. R., Mathur, S., McHardy, I. M., Montouri, C., Musso, R., Nazarov, S. V., Norris, R. P., Nousek, J. A., Okhmat, D. N., Pancoast, A., Parks, J. R., Pei, L., Pogge, R. W., Pott, J.-U., Rafter, S. E., Rix, H.-W., Saylor, D. A., Schimoia, J. S., Schnülle, K., Sergeev, S. G., Siegel, M. H., Spencer, M., Sung, H.-I., Teems, K. G., Turner, C. S., Uttley, P., Vestergaard, M., Villforth, C., Weiss, Y., Woo, J.-H., Yan, H., Young, and S., Zheng, W., Zu, Y.
We conduct a multiwavelength continuum variability study of the Seyfert 1 galaxy NGC 5548 to investigate the temperature structure of its accretion disk. The 19 overlapping continuum light curves (1158 angstrom to 9157 angstrom) combine simultaneous
Externí odkaz:
http://hdl.handle.net/10150/622875
http://arizona.openrepository.com/arizona/handle/10150/622875
http://arizona.openrepository.com/arizona/handle/10150/622875
Autor:
Krogager, J.-K., Fynbo, J. P. U., Heintz, K. E., Geier, S., Ledoux, C., Møller, P., Noterdaeme, P., Venemans, B. P., Vestergaard, M.
We present the results of a new spectroscopic survey for dusty intervening absorption systems, particularly damped Ly alpha absorbers (DLAs), toward reddened quasars. The candidate quasars are selected from mid-infrared photometry from the Wide-field
Externí odkaz:
http://hdl.handle.net/10150/624064
http://arizona.openrepository.com/arizona/handle/10150/624064
http://arizona.openrepository.com/arizona/handle/10150/624064
Autor:
Perrotta, S., D'Odorico, V., Prochaska, J. X., Cristiani, S., Cupani, G., Ellison, S., López, S., Becker, G. D., Berg, T. A. M., Christensen, L., Denney, K. D., Hamann, F., Pâris, I., Vestergaard, M., Worseck, G.
We statistically study the physical properties of a sample of narrow absorption line (NAL) systems looking for empirical evidences to distinguish between intrinsic and intervening NALs without taking into account any a priori definition or velocity c
Externí odkaz:
http://hdl.handle.net/10150/621733
http://arizona.openrepository.com/arizona/handle/10150/621733
http://arizona.openrepository.com/arizona/handle/10150/621733
Autor:
Heintz, K. E., Fynbo, J. P. U., Møller, P., Milvang-Jensen, B., Zabl, J., Maddox, N., Krogager, J.-K., Geier, S., Vestergaard, M., Noterdaeme, P., Ledoux, C.
The sub-population of quasars reddened by intrinsic or intervening clouds of dust are known to be underrepresented in optical quasar surveys. By defining a complete parent sample of the brightest and spatially unresolved quasars in the COSMOS field,
Externí odkaz:
http://hdl.handle.net/10150/622443
http://arizona.openrepository.com/arizona/handle/10150/622443
http://arizona.openrepository.com/arizona/handle/10150/622443
Autor:
López, S., D’Odorico, V., Ellison, S. L., Becker, G. D., Christensen, L., Cupani, G., Denney, K. D., Pâris, I., Worseck, G., Berg, T. A. M., Cristiani, S., Dessauges-Zavadsky, M., Haehnelt, M., Hamann, F., Hennawi, J., Iršič, V., Kim, T.-S., López, P., Lund Saust, R., Ménard, B., Perrotta, S., Prochaska, J. X., Sánchez-Ramírez, R., Vestergaard, M., Viel, M., Wisotzki, L.
We describe the execution and data reduction of the European Southern Observatory Large Programme "Quasars and their absorption lines: a legacy survey of the high-redshift Universe with VLT/X-shooter" (hereafter "XQ-100"). XQ-100 has produced and mad
Externí odkaz:
http://hdl.handle.net/10150/622799
http://arizona.openrepository.com/arizona/handle/10150/622799
http://arizona.openrepository.com/arizona/handle/10150/622799
We investigate the origin of the parsec-scale radio emission from the changing-look active galactic nucleus (AGN) of Mrk 590, and examine whether the radio power has faded concurrently with the dramatic decrease in accretion rates observed between th
Externí odkaz:
http://hdl.handle.net/10150/621462
http://arizona.openrepository.com/arizona/handle/10150/621462
http://arizona.openrepository.com/arizona/handle/10150/621462