J/A+A/351/212 V1794 UBVR time series (Jetsu+, 1999)
Time series analysis of V1794 Cygni long-term photometry
Jetsu L., Pelt J., Tuominen I.
<Astron. Astrophys. 351, 212 (1999)>
=1999A&A...351..212J 1999A&A...351..212J
ADC_Keywords: Stars, variable ; Photometry, UBVRI
Keywords: stars: individual: V1794 Cyg - stars: variables: general -
stars: activity - techniques: photometric
Description:
Standard Johnson UBVRI photometry of V1794 Cyg (HD 199178) between
1975 and 1995 is analysed. Instead of the traditional constant period
ephemeris, we determine the seasonal periodicities (Pphot) and the
primary and secondary minima epochs (tmin,1, tmin,2) of the
normalized UBVRI magnitudes using the three stage period analysis
(TSPA) and complementary methods.
Objects:
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RA (2000) DE Designation(s)
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20 53 53.7 +44 23 11 V1794 Cyg = HD 199178
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 115 93 Means and total amplitudes for the modelled
UBVR light curves of subsets with number of
observing nights (Nnigths) ≥7
table3.dat 66 93 The tmin,1, tmin,2 and P for the ynorm
of subsets with Nnigths≥7.
tables.tex 78 620 LaTeX version of the tables
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See also:
J/A+AS/139/513 : 1975-1995 V1794 Cyg UBVRI photometry (Jetsu+, 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- SET Subset number
5- 11 F7.2 yr Epoch Observation date
13- 18 F6.4 mag MUmag ? Mean U magnitude
20- 24 F5.4 mag e_MUmag ? rms uncertainty on MUmag
26- 31 F6.4 mag AUmag ? Total U amplitude
33- 37 F5.4 mag e_AUmag ? rms uncertainty on AUmag
39- 44 F6.4 mag MBmag ? Mean B magnitude
46- 50 F5.4 mag e_MBmag ? rms uncertainty on MBmag
52- 57 F6.4 mag ABmag ? Total B amplitude
59- 63 F5.4 mag e_ABmag ? rms uncertainty on ABmag
65- 70 F6.4 mag MVmag Mean V magnitude
72- 76 F5.4 mag e_MVmag rms uncertainty on MVmag
78- 83 F6.4 mag AVmag ? Total V amplitude
85- 89 F5.4 mag e_AVmag ? rms uncertainty on AVmag
91- 96 F6.4 mag MRmag ? Mean R magnitude
98-102 F5.4 mag e_MRmag ? rms uncertainty on MRmag
104-109 F6.4 mag ARmag ? Total R amplitude
111-115 F5.4 mag e_ARmag ? rms uncertainty on ARmag
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- SET Subset number
5- 6 I2 --- Nnigths Number of observing nights
8 A1 --- HG [r] Rejections (1)
10- 15 F6.4 d Per Period
17- 21 F5.4 d e_Per rms uncertainty on Per
23- 33 F11.3 d tmin1 Epoch of the primary minimum in time
35- 38 F4.3 d e_tmin1 rms uncertainty on tmin1
40- 50 F11.3 d tmin2 ? Epoch of the secondary minimum in time
52- 55 F4.3 d e_tmin2 ? rms uncertainty on tmin2
57- 59 I3 --- S ? Number of times that a secondary minimum
tmin2 was present in the models of 200
bootstrap samples.
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Note (1): The rejections are denoted with "r", while the rejections are applied
to subsets with Nnigths<10. Finally, rejects the tmin,2 with S<190
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Acknowledgements: Lauri Jetsu
(End) Patricia Bauer [CDS] 10-Sep-1999