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J/A+A/376/775   UBVRI and  H-beta observations of 3C 390.3   (Shapovalova+ 2001)

Intermediate resolution H-beta spectroscopy and photometric monitoring of 3C 390.3. I. Further evidence of a nuclear accretion disk. Shapovalova A.I., Burenkov A.N., Carrasco L., Chavushyan V.H., Doroshenko V.T., Dumont A.M., Lyuty V.M., Valdes J.R., Vlasuyk V.V., Bochkarev N.G., Collin S., Legrand F., Mikhailov V.P., Spiridonova O.I., Kurtanidze O., Nikolashvili M.G. <Astron. Astrophys. 376, 775 (2001)> =2001A&A...376..775S
ADC_Keywords: Active gal. nuclei ; Photometry, UBVRI ; Photometry, Cousins Keywords: galaxies: active - galaxies: Seyfert - galaxies: individual (3C 390.3) - line: profiles Abstract: We have monitored the AGN 3C 390.3 between 1995 and 2000. A historical B-band light curve dating back to 1966 shows a large increase in brightness during 1970-1971, followed by a gradual decrease down to a minimum in 1982. During the 1995-2000 lapse the broad Hβ emission and the continuum flux varied by a factor of ∼3. Two large amplitude outbursts, of different duration, in continuum and light were observed i.e.: in October 1994 a brighter flare that lasted ∼1000 days and in July 1997 another one that lasted ∼700 days were detected. The response time lag of the emission lines relative to flux changes of the continuum has been found to vary with time i.e. during 1995-1997 a lag of about 100 days is evident, while during 1998-1999 a double valued lag of ∼100 days and ∼35 days is present in our data. The flux in the Hβ wings and line core vary simultaneously, a behavior indicative of predominantly circular motions in the broad line region. Important changes of the Hβ emission profiles were detected: at times, we found profiles with prominent asymmetric wings, like those normaly seen in Sy1s, while at other times, we observe profiles with weak, almost symmetrical wings, similar to those of Sy1.8s. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 18 42 09.0 +79 46 17 3C 390.3 = QSO 1845+796 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 74 105 Photometric results table4.dat 62 46 Log of the spectroscopic observations table5.dat 38 46 Observed Hβ and continuum fluxes tables.tex 105 205 LaTeX version of tables 2 and 4
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 10 A10 "YYYY/MM/DD" Date UT Date 12- 22 F11.3 d JD Julian date 24- 28 F5.2 mag Bmag ? B magnitude 30- 33 F4.2 mag e_Bmag ? rms uncertainty on Bmag 35- 40 F6.3 mag Vmag ? V magnitude 42- 46 F5.3 mag e_Vmag ? rms uncertainty on Vmag 48- 52 F5.2 mag Rcmag ? Cousins R magnitude 54- 57 F4.2 mag e_Rcmag ? rms uncertainty on Rcmag 59- 63 F5.2 mag Icmag ? Cousins I magnitude 65- 68 F4.2 mag e_Icmag ? rms uncertainty on Icmag 70- 74 A5 --- Obs Observatory (1)
Note (1): Observatory where the data was obtained: SAO: Spetial Astrofisical Observatory SAI: Crimean Laboratory Abast: Abastumani Astrophysical Observatory in Georgia
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 10 A10 "YYYY/MM/DD" Date UT Date 12- 22 F11.3 d JD Julian date 24- 25 A2 --- Instr Instrumentation code (G1) 27- 29 F3.1 arcsec Aper1 Aperture (slit width) 30 A1 --- --- [x] 31- 34 F4.1 arcsec Aper2 Aperture (slit length) 36- 39 I4 0.1nm Range1 Lower value of the spectral range 40 A1 --- --- [-] 41- 44 I4 0.1nm Range2 Upper value of the spectral range 46- 49 F4.1 0.1nm Resol Spectral Resolution 51- 53 F3.1 arcsec Seeing ? Seeing 54 A1 --- --- [-] 55 I1 arcsec Seeing2 ? Upper value of Seeing when interval 56 A1 --- u_Seeing2 [?] Uncertainty flag on Seeing and Seeing2 58- 61 F4.1 --- S/N Signal-to-noise ratio (2) 62 A1 --- n_S/N [a] a: Estimated S/N ratio in the line-free continuum (5330-5370Å)
Note (2): S/N is computed in a region of the continuum (537-542nm) where there are no prominent emission or absorption lines.
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 11 F11.3 d JD Julian date 13- 14 A2 --- Instr Instrumentation code (G1) 16- 20 F5.3 10-16W/m2 FHbeta Total flux in Hβ (1) 22- 26 F5.3 10-16W/m2 e_FHbeta rms uncertainty on FHbeta (1) 28- 32 F5.3 10-17W/m2/nm Fc Continuum flux at 5125Å, reduced to the 6m telescope aperture(2"x6") (2) 34- 38 F5.3 10-17W/m2/nm e_Fc Estimated continuum flux error (2)
Note (1): In units of 10-13erg/s/cm2 Note (2): In units of 10-15erg/s/cm2
Global Notes: Note (G1): The codes are: G = 6m SAO, Prime focus UAGS 530x580 pixels P = 6m SAO, Prime focus UAGS 1024x1024 pixels T = 6m SAO, Prime focus Multi-Pupil Field Spectrograph 530x580 pixels N = 6m SAO, Nasmyth focus Long slit 1024x1024 pixels Z1 = 1m Zeiss, Cassegrain UAGS 530x580 pixels Z2 = 1m Zeiss, Cassegrain UAGS 1040x1170 pixels M = 2.1m GHO, Cassegrain Boller&Chivens 1024x1024 pixels
Acknowledgements: Luis Carrasco
(End) Patricia Bauer [CDS] 15-Aug-2001
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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