Search: (WFRF:(Penfold J.)) pers:(Ptak R. L.) >
Multiwavelength obs...
Multiwavelength observations of short-timescale variability in NGC 4151. I. Ultraviolet observations
- Article/chapterEnglish1996
Publisher, publication year, extent ...
-
American Astronomical Society,1996
-
printrdacarrier
Numbers
-
LIBRIS-ID:oai:DiVA.org:uu-197163
-
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-197163URI
-
https://doi.org/10.1086/177869DOI
Supplementary language notes
-
Language:English
-
Summary in:English
Part of subdatabase
Classification
-
Subject category:ref swepub-contenttype
-
Subject category:art swepub-publicationtype
Notes
-
Presents the results of an intensive ultraviolet monitoring campaign on the Seyfert 1 galaxy NGC 4151, as part of an effort to study its short-timescale variability over a broad range in wavelength. The nucleus of NGC 4151 was observed continuously with the International Ultraviolet Explorer for 9.3 days, yielding a pair of LWP and SWP spectra every ~70 minutes, and during 4 hr periods for 4 days prior to and 5 days after the continuous-monitoring period. The sampling frequency of the observations is an order of magnitude higher than that of any previous UV monitoring campaign on a Seyfert galaxy. The continuum fluxes in bands from 1275 to 2688 Aring went through four significant and well-defined ldquoeventsrdquo of duration 2-3 days during the continuous-monitoring period. The authors find that the amplitudes of the continuum variations decrease with increasing wavelength, which extends a general trend for this and other Seyfert galaxies to smaller timescales (i.e., a few days). The continuum variations in all the UV bands are simultaneous to within an accuracy of ~0.15 days, providing a strict constraint on continuum models. The emission-line light curves show only one major event during the continuous monitoring (a slow rise followed by a shallow dip) and do not correlate well with continuum light curves over the short duration of the campaign, because the timescale for continuum variations is apparently smaller than the response times of the emission lines
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
-
Rodriguez-Pascual, P. M.
(author)
-
Penton, S. V.
(author)
-
Edelson, R. A.
(author)
-
Alloin, D.
(author)
-
Ayres, T. R.
(author)
-
Clavel, J.
(author)
-
Horne, K.
(author)
-
Johnson, W. N.
(author)
-
Kaspi, S.
(author)
-
Korista, K. T.
(author)
-
Kriss, G. A.
(author)
-
Krolik, J. H.
(author)
-
Malkan, M. A.
(author)
-
Maoz, D.
(author)
-
Netzer, H.
(author)
-
O'Brien, P. T.
(author)
-
Peterson, B. M.
(author)
-
Reichert, G. A.
(author)
-
Shull, J. M.
(author)
-
Ulrich, M. -H
(author)
-
Wamsteker, W.
(author)
-
Warwick, R. S.
(author)
-
Yaqoob, T.
(author)
-
Balonek, T. J.
(author)
-
Barr, P.
(author)
-
Bromage, G. E.
(author)
-
Carini, M.
(author)
-
Carone, T. E.
(author)
-
Cheng, F. -Z
(author)
-
Chuvaev, K. K.
(author)
-
Dietrich, M.
(author)
-
Doroshenko, V. T.
(author)
-
Dultzin-Hacyan, D.
(author)
-
Filippenko, A. V.
(author)
-
Gaskell, C. M.
(author)
-
Glass, I. S.
(author)
-
Goad, M. R.
(author)
-
Hutchings, J.
(author)
-
Kazanas, D.
(author)
-
Kollatschny, W.
(author)
-
Koratkar, A. P.
(author)
-
Laor, A.
(author)
-
Leighly, K.
(author)
-
Lyutyi, V. M.
(author)
-
MacAlpine, G. M.
(author)
-
Malkov, Yu.F.
(author)
-
Martin, P. G.
(author)
-
McCollum, B.
(author)
-
Merkulova, N. I.
(author)
-
Metik, L.
(author)
-
Metlov, V. G.
(author)
-
Miller, H. R.
(author)
-
Morris, S. L.
(author)
-
Oknyanskij, V. L.
(author)
-
Penfold, J.
(author)
-
Perez, E.
(author)
-
Perola, G. C.
(author)
-
Pike, G.
(author)
-
Pogge, R. W.
(author)
-
Pronik, I.
(author)
-
Pronik, V. I.
(author)
-
Ptak, R. L.
(author)
-
Recondo-Gonzalez, M. C.
(author)
-
Rodriguez-Espinoza, J. M.
(author)
-
Rokaki, E. L.
(author)
-
Roland, J.
(author)
-
Sadun, A. C.
(author)
-
Salamanca, I.
(author)
-
Santos-Lleo, M.
(author)
-
Sergeev, S. G.
(author)
-
Smith, S. M.
(author)
-
Snijders, M. A. J.
(author)
-
Sparke, L. S.
(author)
-
Stirpe, G. M.
(author)
-
Stoner, R. E.
(author)
-
Sun, W. -H
(author)
-
van Groningen, E.
(author)
-
Wagner, R. M.
(author)
-
Wagner, S.
(author)
-
Wanders, I.
(author)
-
Welsh, W. F.
(author)
-
Weymann, R. J.
(author)
-
Wilkes, B. J.
(author)
-
Zheng, W.
(author)
Related titles
-
In:Astrophysical Journal: American Astronomical Society470:1, s. 322-3353350004-637X1538-4357
Internet link
Find in a library
To the university's database
- By the author/editor
-
Crenshaw, D. M.
-
Rodriguez-Pascua ...
-
Penton, S. V.
-
Edelson, R. A.
-
Alloin, D.
-
Ayres, T. R.
-
show more...
-
Clavel, J.
-
Horne, K.
-
Johnson, W. N.
-
Kaspi, S.
-
Korista, K. T.
-
Kriss, G. A.
-
Krolik, J. H.
-
Malkan, M. A.
-
Maoz, D.
-
Netzer, H.
-
O'Brien, P. T.
-
Peterson, B. M.
-
Reichert, G. A.
-
Shull, J. M.
-
Ulrich, M. -H
-
Wamsteker, W.
-
Warwick, R. S.
-
Yaqoob, T.
-
Balonek, T. J.
-
Barr, P.
-
Bromage, G. E.
-
Carini, M.
-
Carone, T. E.
-
Cheng, F. -Z
-
Chuvaev, K. K.
-
Dietrich, M.
-
Doroshenko, V. T ...
-
Dultzin-Hacyan, ...
-
Filippenko, A. V ...
-
Gaskell, C. M.
-
Glass, I. S.
-
Goad, M. R.
-
Hutchings, J.
-
Kazanas, D.
-
Kollatschny, W.
-
Koratkar, A. P.
-
Laor, A.
-
Leighly, K.
-
Lyutyi, V. M.
-
MacAlpine, G. M.
-
Malkov, Yu.F.
-
Martin, P. G.
-
McCollum, B.
-
Merkulova, N. I.
-
Metik, L.
-
Metlov, V. G.
-
Miller, H. R.
-
Morris, S. L.
-
Oknyanskij, V. L ...
-
Penfold, J.
-
Perez, E.
-
Perola, G. C.
-
Pike, G.
-
Pogge, R. W.
-
Pronik, I.
-
Pronik, V. I.
-
Ptak, R. L.
-
Recondo-Gonzalez ...
-
Rodriguez-Espino ...
-
Rokaki, E. L.
-
Roland, J.
-
Sadun, A. C.
-
Salamanca, I.
-
Santos-Lleo, M.
-
Sergeev, S. G.
-
Smith, S. M.
-
Snijders, M. A. ...
-
Sparke, L. S.
-
Stirpe, G. M.
-
Stoner, R. E.
-
Sun, W. -H
-
van Groningen, E ...
-
Wagner, R. M.
-
Wagner, S.
-
Wanders, I.
-
Welsh, W. F.
-
Weymann, R. J.
-
Wilkes, B. J.
-
Zheng, W.
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Astronomy Astrop ...
- Articles in the publication
-
Astrophysical Jo ...
- By the university
-
Uppsala University