J/PAZh/27/83 Nuclear activity of NGC 4151 in 1989-2000 (Doroshenko+, 2001)
Nuclear activity of NGC 4151 as inferred from UBVRI observations in 1989-2000.
Doroshenko V.T., Lyuty V.M., Bochkarev N.G., Vlasyuk V.V., Mikhailov V.P.,
Spiridonova O.I., Grankin K.N., Ezhkova O.V., Mel'nikov S.Y.
<Pis'ma Astron. Zh. 27, 83 (2001)>
=2001PAZh...27...83D 2001PAZh...27...83D
=2001AstL...27...65D 2001AstL...27...65D
ADC_Keywords: Galaxies, Seyfert; Photometry, UBVRI
Abstract:
Broadband UBVRI observations of the nucleus of the Seyfert galaxy
NGC 4151 from 1989 until 2000 at three astronomical observatories: the
Crimean Station of the Sternberg astronomical institute, The Special
Astronomical observatory in the Caucasus and the Maidanac observatory
of the Ulugbek Astronomical institute in Uzbekistan. All data have
been reduced to a single system and are given for an A=27.5" aperture.
Object:
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RA (2000) DE Designation
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12 10 32.4 +39 24 30 NGC 4151
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 56 446 UBVRI observations of NGC 4151 nucleus
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Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 11 F11.3 d JD [2447591/2451618] Julian date
14- 18 F5.2 mag Umag ? U magnitude
21- 25 F5.2 mag Bmag ? B magnitude
28- 32 F5.2 mag Vmag ? V magnitude
35- 39 F5.2 mag Rmag ? R magnitude
42- 46 F5.2 mag Imag ? I magnitude
49- 56 A8 --- Note Origin of the data (1)
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Note (1): Origin of the data:
SAIp: Crimean photoelectric data, UBVRI system close to Johnson's
standard photometric system.
SAIc: Crimean CCD data, UBVRI system close to Johnson's
standard photometric system.
Mdn : Maidanac photoelectric data, standard UBVR filters in
Johnson's system.
SAOc: SAO CCD data, BVRI filters. The instrumental photometric system
differs only slightly from Johnson-Cousins' international
system used in CCD photometry.
Mdn-SAIp: average values from Maidanak and Sternberg observations
Mdn-SAO: average values from Maidanak and SAO observations;
SAIc-SAO: average values from Crimea and SAO observations;
SAO-SAIp: average values from SAO and Crimea observations;
Mdn-SAIa: average values from Maidanak and Crimea observations
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(End) Veta Avedisova [INASAN] 22-May-2001, rev. 01-Aug-2001