Zobrazeno 1 - 10
of 25
pro vyhledávání: '"N. I. Merkulova"'
Publikováno v:
Astronomy & Astrophysics. 437:87-93
We present results of UBVRI photometry of Mrk 335 in 1995-2004. This object has a large amplitude of variability, reaching about 1.1, 0.9, 0.7 mag in the U, B, V and 0.3 mag in the Rc, Ic bands, respectively. This photomerical behaviour as well as th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e47ce29361ffb1bf7e294abfbe710e89
https://doi.org/10.1051/0004-6361:20042298
https://doi.org/10.1051/0004-6361:20042298
Autor:
V. T. Doroshenko, S. G. Sergeev, N. I. Merkulova, E. A. Sergeeva, Yu V. Golubinsky, V. I. Pronik, N. N. Okhmat
Publikováno v:
Astrophysics. 48:156-178
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2dd9304f6a5aaf70dbc74c861ade2328
https://doi.org/10.1007/s10511-005-0016-5
https://doi.org/10.1007/s10511-005-0016-5
Publikováno v:
The Astrophysical Journal. 622:129-135
We determine interband lags between variations in the B band and variations in the V, R, and I bands for 14 active galactic nuclei observed at the Crimean Astrophysical Observatory. The computed lags range from tenths of a day to several days, and it
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3737a00fed3e763315d4a7a50c670ea3
https://doi.org/10.1086/427820
https://doi.org/10.1086/427820
Publikováno v:
Astrophysics. 46:291-303
UBVRcIc observations of SN 2002ap during February, October, and November 2002 at the Crimean Astrophysical Observatory are reported. An examination of our photometric data, along with published data, shows that over a period of about a year from the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f37bda8ce293a4f0046c38c5b60ca231
https://doi.org/10.1023/a:1025445529178
https://doi.org/10.1023/a:1025445529178
Autor:
B. M. Peterson, P. Berlind, R. Bertram, K. Bischoff, N. G. Bochkarev, N. Borisov, A. N. Burenkov, M. Calkins, L. Carrasco, V. H. Chavushyan, R. Chornock, M. Dietrich, V. T. Doroshenko, O. V. Ezhkova, A. V. Filippenko, A. M. Gilbert, J. P. Huchra, W. Kollatschny, D. C. Leonard, W. Li, V. M. Lyuty, Yu. F. Malkov, T. Matheson, N. I. Merkulova, V. P. Mikhailov, M. Modjaz, C. A. Onken, R. W. Pogge, V. I. Pronik, B. Qian, P. Romano, S. G. Sergeev, E. A. Sergeeva, A. I. Shapovalova, O. I. Spiridonova, J. Tao, S. Tokarz, J. R. Valdes, V. V. Vlasiuk, R. M. Wagner, B. J. Wilkes
Publikováno v:
The Astrophysical Journal. 581:197-204
We present the final installment of an intensive 13-year study of variations of the optical continuum and broad H-beta emission line in the Seyfert 1 galaxy NGC 5548. The data base consists of 1530 optical continuum measurements and 1248 H-beta measu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4eb96ee277a452eb18ca80d594eea404
https://doi.org/10.1086/344197
https://doi.org/10.1086/344197
Autor:
N. I. Merkulova
Publikováno v:
Astronomy & Astrophysics. 387:40-55
An ongoing program on photometric and spectral monitoring of some bright Seyfert galaxies has been carried out at the Crimean Astrophysical Observatory since 1989. Results of photometric observations of NGC 5548 obtained with the 1.25 m telescope are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dcb19d958254f5a31ba57cc3981ffa9e
https://doi.org/10.1051/0004-6361:20020343
https://doi.org/10.1051/0004-6361:20020343
Autor:
K. N. Grankin, S. G. Sergeev, O. I. Spiridonova, V. V. Vlasyuk, V. P. Mikhailov, V. M. Lyuty, N. I. Merkulova, S. Yu. Mel'Nikov, V. T. Doroshenko, O. V. Ezhkova, N. G. Bochkarev
Publikováno v:
Astronomy Letters. 27:691-702
We present our UBV RI observations of the nucleus of the Seyfert Galaxy NGC 5548 from 1990 until 2000 at four astronomical observatories: the Crimean Station of the Sternberg Astronomical Institute, the Special Astrophysical Observatory of the Russia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32152b26f49b496e6ad70628ef0d94cd
https://doi.org/10.1134/1.1415858
https://doi.org/10.1134/1.1415858
Publikováno v:
Astronomy & Astrophysics. 374:770-783
The Structure Function (SF) analysis of variable fluxes of the Seyfert galaxy NGC 4151 obtained during its extraordinary brightening in 1989{1996 in the UBVRI bands is reported. More than 1500 measurements were made in each spectral band. The logarit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f8cda08842f5ad17e9ff213c68915f03
https://doi.org/10.1051/0004-6361:20010786
https://doi.org/10.1051/0004-6361:20010786
Publikováno v:
EAS Publications Series. 1:179-186
Data on continuum variability of the Seyfert galaxy NGC 4151 nucleus are compiled. The most of them related to new cycle of the nucleus activity in 1989-1996. X-ray through the UV and optical data show remarkable similarity in variability characteris
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56d1efc0714f0345d3d794ee8927132c
https://doi.org/10.1051/eas:2001021
https://doi.org/10.1051/eas:2001021
Autor:
N. I. Merkulova
Publikováno v:
The Astronomical Journal. 119:631-643
Observations of the nuclear region of the Seyfert galaxy NGC 7469 obtained at Crimean Astrophysical Observatory with the 1.25 m telescope are presented. During 64 nights on nine observational runs between 1990 September 24 and 1998 October 22 in each
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35b08b6060cebc9fea3a5347f5d28495
https://doi.org/10.1086/301199
https://doi.org/10.1086/301199