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J/A+A/582/A113       V1184 Tauri UBVRI light curves              (Semkov+, 2015)

The pre-main-sequence star V1184 Tauri (CB 34V) at the end of prolonged eclipse. Semkov E.H., Peneva S.P., Ibryamov S.I. <Astron. Astrophys. 582, A113 (2015)> =2015A&A...582A.113S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Stars, pre-main sequence ; Photometry, UBVRI Keywords: stars: pre-main sequence - star: variable: T Tauri, Herbig Ae/Be - stars: individual: V1184 Tauri Abstract: V1184 Tau (CB 34V) lies in the field of the Bok globule CB 34 and was discovered as a large amplitude variable in 1993. According to the first hypothesis of the variability of the star, it is a FU Orionis candidate erupted between 1951 and 1993. During subsequent observations, the star manifests large amplitude variability interpreted as obscuration from circumstellar clouds of dust. We included V1184 Tau (CB 34V) in our target list of highly variable pre-main-sequence stars to determine the reasons for the variations in the brightness of this object. Data from BVRI photometric observations of V1184 Tau were performed in two observatories with two medium-sized and two small telescopes. Our results indicate that during periods of maximum light the star shows characteristics typical of T Tauri stars. During the observed deep minimum in brightness, however, V1184 Tau is rather similar to UX Orionis objects. The deep drop in brightness magnitude diagrams is also confirmation of obscuration from circumstellar clouds of dust as a reason for the large amplitude variability in the brightness. Description: UBVRI photometric data of V1184 Tauri during the period from 2000 October to 2015 April are presented. The CCD observations were performed in two observatories, with four telescopes. These are the 2-m Ritchey-Chretien- Coude (RCC), the 50/70-cm Schmidt and the 60-cm Cassegrain telescopes of the Rozhen National Astronomical Observatory of the Bulgarian Academy of Sciences (Bulgaria) and the 1.3-m Ritchey-Chretien (RC) telescope of the Skinakas Observatory of the University of Crete (Greece). The observations were performed with eight different types of CCD cameras - Photometrics AT200 and VersArray 1300B at the 2-m RCC telescope; Photometrics CH360 and ANDOR DZ436-BV at the 1.3-m RC telescope; SBIG ST-8, SBIG STL-11000M and FLI PL16803 at the 50/70-cm Schmidt telescope; and FLI PL09000 at the 60-cm Cassegrain telescope. All frames were taken through a standard Johnson-Cousins set of filters. The photometric data were reduced by IDL package (standard subroutine DAOPHOT). To minimize the light from the surrounding nebula all data were analysed using the same aperture, which was chosen as 4 arcsec radius. The background is taken from 15 arcsec to 20 arcsec. As a reference the BVRI comparison sequence reported in Semkov (2003A&A...404..655S, 2006AN....327..328S) was used. The UBVRI photometric data, obtained in the period from October 2000 to 2002 April are presented in Semkov (2003A&A...404..655S). The data, collected in the period from 2002 August to 2004 March are presented in Semkov (2004, A&A, 419, L59-L62). And the CCD BVRI photometric data, acquired in the period from 2005 November to 2007 November are presented in Semkov et al. (2008A&A...483..537S). Objects: ----------------------------------------------- RA (2000) DE Designation(s) ----------------------------------------------- 05 47 03.77 +21 00 34.8 V1184 Tau = CB 34V ----------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table.dat 63 286 Photometric CCD observations of V1184 Tau during the period October 2000-April 2015
Byte-by-byte Description of file: table.dat
Bytes Format Units Label Explanations
1- 10 A10 "date" Date Date of observation ("DD.MM.YYYY" format) 12- 20 F9.3 d JD Julian Date (JD-2400000) 22- 26 F5.2 mag Imag ?=- I magnitude 28- 32 F5.2 mag Rmag ?=- R magnitude 34- 38 F5.2 mag Vmag ?=- V magnitude 40- 44 F5.2 mag Bmag ?=- B magnitude 46- 50 F5.2 mag Umag ?=- U magnitude 52- 56 A5 --- Tel Telescope used (1) 58- 63 A6 --- CCD CCD used (2)
Note (1): Telescopes as follows: 2-m = 2-m Ritchey-Chretien-Coude telescope of the Rozhen National Astronomical Observatory (Bulgaria) 1.3-m = 1.3-m Ritchey-Chretien telescope of the Skinakas Observatory of the University of Crete (Greece) Schmidt = 50/70-cm Schmidt telescope of the Rozhen National Astronomical Observatory (Bulgaria) 60-cm = 60-cm cassegrain telescope of the Rozhen National Astronomical Observatory (Bulgaria) Note (2): CCD cameras as follows: Phot = Photometrics AT200 (2-m RCC telescope) Photometrics CH360 (1.3-m RC telescope) VA = VersArray 1300B ANDOR = ANDOR DZ436-BV ST-8 = SBIG ST-8 STL-11 = SBIG STL-11000M FLI = FLI PL16803 (50/70-cm Shmidt telescope) FLI PL09000 (60-cm Cassegrain telescope)
Acknowledgements: Sunay I. Ibryamov, sibryamov(at), Bulgarian Academy of Sciences; University of Shumen, Bulgaria.
(End) Patricia Vannier [CDS] 26-Oct-2015
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