J/other/BAJ/22.3 BVRI photometry of 5 PMS stars (Ibryamov+, 2015)
Long-term BVRI light curves of 5 pre-main sequence stars in the field of
"Gulf of Mexico".
Ibryamov S.I., Semkov E.H., Peneva S.P.
<Bulgarian Astron. J., 22, 3 (2015)>
=2015BAJ....22....3I 2015BAJ....22....3I
ADC_Keywords: Stars, variable ; Stars, pre-main sequence ; Photometry, UBVRI
Keywords: stars: pre-main sequence - star: variable: T Tauri, UX Orionis -
stars: individual: V521 Cyg, V752 Cyg, V1539 Cyg, V1716 Cyg, V2051 Cyg
Abstract:
We present new data from BVRI photometric observations of five PMS
stars during the period from April 2013 to July 2014. The stars are
located in the field of NGC 7000/IC 5070 ("Gulf of Mexico") - a region
with active star formation. The presented paper is a continuation of
our long-term photometric investigations of the young stellar objects
in this region. The long-term multicolor photometric observations of
PMS stars are very important for their exact classification. Our
results show that the studied stars exhibit different types of
photometric variability in all bands. We tried to classify them using
our data from the long-term photometry and data published by other
authors.
Description:
BVRI photometric data of 5 pre-main sequence stars (V521 Cyg, V752
Cyg, V1539 Cyg, V1716 Cyg, V2051 Cyg) during the period April 2013 to
July 2014 are presented. The CCD observations were performed in two
observatories with four telescopes: the 2-m Ritchey-Chretien-Coude
(RCC), the 50/70-cm Schmidt and the 60-cm Cassegrain telescopes of the
Rozhen National Astronomical Observatory (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
four types of CCD cameras. All frames were taken through a standard
Johnson-Cousins set of filters. All data were analyzed using the same
aperture, which was chosen to have a 4" radius (while the background
annulus was taken from 9" to 14"). The mean value of the errors in the
reported magnitudes are: 0.01-0.02 mag for I- and the R-band data,
0.02-0.05mag for the V-band data and 0.02-0.09mag for the B-band
data.
These data are a continuation of our long-term photometric
investigations of these stars. The previous data can be found in
J/A+A/568/A49 "Pre-main sequence stars long term photometry" by
(Poljancic Beljan+, 2014).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 43 5 List of studied stars
table1.dat 67 50 V521 Cyg photometric CCD observations
during the period April 2013 - July 2014
table2.dat 65 32 V752 Cyg photometric CCD observations
during the period April 2013 - July 2014
table3.dat 67 39 V1539 Cyg Photometric CCD observations
during the period April 2013 - July 2014
table4.dat 67 50 V1716 Cyg Photometric CCD observations
during the period April 2013 - July 2014
table5.dat 67 39 V2051 Cyg Photometric CCD observations
during the period April 2013 - July 2014
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See also:
J/A+A/568/A49 : PMS sequence stars long term phot. (Poljancic Beljan+, 2014)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Star Star name
11- 12 I2 h RAh Righ ascension (J2000)
14- 15 I2 min RAm Righ ascension (J2000)
17- 20 F4.1 s RAs Righ ascension (J2000)
22 A1 --- DE- Declination sign (J2000)
23- 24 I2 deg DEd Declination (J2000)
26- 27 I2 arcmin DEm Declination (J2000)
29- 32 F4.1 arcsec DEs Declination (J2000)
34- 43 A10 --- FileName Name of the file with photometry
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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- 10 A10 "date" Date Date of observation ("YYYY/MM/DD")
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- 54 A7 --- Tel Telescope used (1)
56- 58 A3 --- CCD CCD used (2)
60- 67 A8 --- Obs Name of observatory
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Note (1): Telescopes as follows:
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)
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)
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:
Sunay Ibryamov, sibryamov(at)astro.bas.bg,
Bulgarian Academy of Sciences
(End) Patricia Vannier [CDS] 08-Oct-2014