J/other/BAJ/29.10 Long-term BVRI photometry of V1704 Cygni (Ibryamov+, 2018)
Multicolor photometric behavior of the young stellar object V1704 Cygni.
Ibryamov S., Semkov E., Peneva S., Karadeniz U.
<Bulgarian Astron. J., 29, 10-18 (2018)>
=2018BAJ....29...10I 2018BAJ....29...10I (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Stars, pre-main sequence ; Photometry, UBVRI
Keywords: stars: pre-main sequence - star: variable: T Tauri -
stars: individual: V1704 Cygni
Abstract:
Results from BVRI photometric observations of the pre-main sequence
star V1704 Cyg collected during the time period from August 2010 to
December 2017 are presented. The star is located in the star-forming
HII region IC 5070 and it exhibits photometric variability in all
optical passbands. After analysing the obtained data, V1704 Cyg is
classified as a classical T Tauri star.
Description:
BVRI photometric data of V1704 Cyg collected during the period from
August 2010 to December 2017 are presented. The CCD observations were
carried out with the 2-m Ritchey-Chretien-Coude, the 50/70-cm Schmidt
and the 60-cm Cassegrain telescopes administered by the Rozhen
National Astronomical Observatory in Bulgaria and the 1.3-m
Ritchey-Chretien telescope administered by the Skinakas Observatory in
Greece. The total number of the nights used for observations is 212.
The technical parameters and specifications for the cameras used are
given in Ibryamov et al. (2015PASA...32...21I 2015PASA...32...21I). All frames were taken
through a standard Johnson-Cousins BVRI set of filters. The frames are
dark (bias) frame subtracted and flat field corrected. The photometric
data were reduced using IDL based DAOPHOT subroutine. As a reference,
the BVRI comparison sequence of eleven stars reported in Ibryamov et
al. (2018, Cat. J/other/PASA/35.7) was used. All data were analysed
using the same aperture, which was chosen to have a 4-arcsec radius,
while the background annulus was taken from 9 to 14-arcsec. The
average value of the errors in the reported magnitudes is 0.01-0.02mag
for the I- and R-band data and 0.01-0.03mag for the V- and B-band
data.
Objects:
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RA (2000) DE Designation(s)
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20 51 26.68 +44 04 24.7 V1704 Cygni = V* V1704 Cyg
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 56 212 V1704 Cygni photometric CCD observations during
the period 2010 Aug-2017 Dec
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See also:
J/other/RAA/14.1264 : V350 Cep UBVRI long-term photometry (Ibryamov+, 2014)
J/other/PASA/32.11 : Long-term UBVRI photometry of GM Cep (Semkov+, 2015)
J/other/PASA/32.21 : Long-Term Multicolour Photometry of YSOs (Ibryamov+ 2015)
J/other/BAJ/22.3 : BVRI photometry of 5 PMS stars (Ibryamov+, 2015)
J/other/BAJ/24.62 : BVRI Photometry of 14 PMS stars (Ibryamov+, 2016)
J/other/RAA/17.20 : V977 Cep & V982 Cep long-term photometry (Ibryamov+ 2017)
J/other/PASA/35.7 : Long-term BVRI photometry of V2492 Cygni (Ibryamov+ 2018)
J/other/RAA/18.137 : 15 PMS stars long-term BVRI photometry (Ibryamov+, 2018)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "date" Date Date of observation ('DD.MM.YYYY' format)
12- 22 F11.3 d JD Julian Date
24- 28 F5.2 mag Imag ? I magnitude
30- 34 F5.2 mag Rmag ? R magnitude
36- 40 F5.2 mag Vmag ? V magnitude
42- 46 F5.2 mag Bmag ? B magnitude
48- 52 A5 --- Tel Telescope used (1)
54- 56 A3 --- CCD CCD used (2)
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Note (1): Telescopes as follows:
2-m = 2-m Ritchey-Chretien-Coude telescope of the Rozhen National
Astronomical Observatory (Bulgaria)
Sch = 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)
1.3-m = 1.3-m Ritchey-Chretien telescope of the Skinakas Observatory
(Greece)
Note (2): CCD cameras as follows:
FLI = FLI PL16803 (50/70-cm Shmidt telescope)
FLI PL09000 (60-cm Cassegrain telescope)
VA = VersArray 1300B
AND = ANDOR DZ436-BV
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Acknowledgements:
Dr. Sunay I. Ibryamov, sibryamov(at)shu.bg,
Department of Physics and Astronomy, University of Shumen, Bulgaria
(End) Patricia Vannier [CDS] 02-Jan-2019