J/A+A/627/A135 VRI photometry of IC5070 variable stars (Bhardwaj+, 2019)
Variability of young stellar objects in the star-forming region Pelican Nebula.
Bhardwaj A., Panwar N., Herczeg G.H., Chen W.P., Singh H.P.
<Astron. Astrophys. 627, A135 (2019)>
=2019A&A...627A.135B 2019A&A...627A.135B (SIMBAD/NED BibCode)
ADC_Keywords: Star Forming Region ; Stars, variable ; Photometry, VRI
Keywords: stars: pre-main-sequence -
stars: variables: general, T Tauri, Herbig Ae/Be -
open clusters and associations: general - stars: low-mass
Abstract:
We observed a field of 16'x16' in the star-forming region Pelican
Nebula (IC 5070) at BVRI wavelengths for 90 nights spread over one
year in 2012-2013. More than 250 epochs in VRI-bands are used to
identify and classify variables up to V∼21mag. We present a catalogue
of optical time-series photometry with periods, mean-magnitudes and
classifications for 95 variable stars including 67 pre-main-sequence
variables towards star-forming region IC 5070. The pre-main-sequence
variables are further classified as candidate classical T Tauri and
weak-line T Tauri stars based on their light curve variations and the
locations on the color-color and color-magnitude diagrams using
optical and infrared data together with Gaia DR2 astrometry. Classical
T Tauri stars display variability amplitudes up to three times the
maximum fluctuation in disk-free weak-line T Tauri stars, which show
strong periodic variations. Short-term variability is missed in our
photometry within single nights. Several classical T Tauri stars
display long-lasting (>10 days) single or multiple fading and
brightening events up to a couple of magnitudes at optical
wavelengths.
Description:
Time-series photometry of variable stars in IC 5070 is presented at
VRI wavelengths. The periods (if periodic), mean-magnitudes and
classifications of variable stars towards star-forming region IC 5070
is also provided.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 102 95 Properties of variable sources
table1.dat 29 50670 Time-series photometry for 75 variable sources
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See also:
J/other/BAJ/24.62 : BVRI Photometry of 14 PMS stars (Ibryamov+, 2016)
J/other/RAA/18.137 : Long-term BVRI photometry of 15 PMS stars
(Ibryamov+, 2018)
J/A+A/602/A115 : X-ray survey of NGC7000/IC5070 (Damiani+, 2017)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- ID Star ID (VNNN)
6- 14 F9.5 deg RAdeg Right Ascension (J2000)
16- 23 F8.5 deg DEdeg Declination (J2000)
25- 30 F6.3 d Per ?=0 Period
32- 37 F6.3 mag Bmag ?=99.990 B-band magnitude
39- 44 F6.3 mag Vmag ?=99.990 V-band magnitude
46- 51 F6.3 mag Rmag ?=99.990 R-band magnitude
53- 58 F6.3 mag Imag ?=99.990 I-band magnitude
60- 64 F5.3 mag e_Bmag ?=9.990 Uncertainty in B-band magnitude
66- 70 F5.3 mag e_Vmag ?=9.990 Uncertainty in V-band magnitude
72- 76 F5.3 mag e_Rmag ?=9.990 Uncertainty in R-band magnitude
78- 82 F5.3 mag e_Imag ?=9.990 Uncertainty in I-band magnitude
84- 88 F5.3 mag AmpV ?=9.990 V-band amplitude
90- 94 F5.3 mag AmpR ?=9.990 R-band amplitude
96-100 F5.3 mag AmpI ?=9.990 I-band amplitude
102 A1 --- LC [Y] Y indicates light curve data in table2.dat
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- ID Star ID
6 A1 --- Band [VRI] Observed band
8- 16 F9.3 d MJD Modified Julian date (JD-2400000)
18- 23 F6.3 mag mag band magnitude
25- 29 F5.3 mag e_mag Uncertainties in band magnitude
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Acknowledgements:
Bhardwaj Anupam, abhardwaj(at)pku.edu.cn
(End) Bhardwaj Anupam [Beijing, China], Patricia Vannier [CDS] 04-Jun-2019