Access to Astronomical Catalogues

← Click to display the menu
J/A+A/456/261    Differential uvby photometry of HD 239276    (Rodriguez+, 2006)

Asteroseismology of the new multiperiodic Gamma Dor variable HD 239276. Rodriguez E., Costa V., Zhou A.-Y., Grigahcene A., Dupret M.A., Suarez J.C., Moya A., Lopez-Gonzalez M.J., Wei J.-Y., Fan Y. <Astron. Astrophys. 456, 261 (2006)> =2006A&A...456..261R
ADC_Keywords: Stars, variable ; Photometry, uvby Keywords: stars: variables: general - stars: individual: HD 239276 - stars: oscillations - techniques: photometric Abstract: The variability of HD 239276 was suspected photometrically nearly twenty years ago, but was confirmed with new observations obtained in 2001 during a two-site photometric campaign carried out from Spain, in uvbyβ Stroemgren-Crawford photometry, and China, using the Johnson V filter. Two low-dispersion spectra were also collected. The results establish this star as a new multiperiodic gamma Dor-type pulsator with deficiency in metallicity. Description: Table 2 contents 139 simultaneous measurements collected during in each of the four uvby colours of the Stromgren photometric system for the Gamma Doradus variable HD 239276. The observations were carried out by the authors through the years 1986-1987 using the 0.90m telescope at Sierra Nevada Observatory, Spain and the six-channel uvby-Hbeta spectrograph photometer for simultaneous measurements in uvby or in the narrow and wide Hbeta channels, respectively. Table 3 contents 101 measurements collected in the V filter of the Johnson photometric system for the Gamma Doradus variable HD 239276. The observations were carried out by the authors through the year 2001 using the three-channel high-speed photoelectric photometer P45-A mounted on the 0.85m telescope at Xinglong Station of the Beijing Astronomical Observatory, China. Table 4 contents 582 simultaneous measurements collected during in each of the four uvby colours of the Stromgren photometric system for the Gamma Doradus variable HD 239276. The observations were carried out by the authors through the year 2001 using the 0.90m telescope at Sierra Nevada Observatory, Spain and the six-channel uvby-Hbeta spectrograph photometer for simultaneous measurements in uvby or in the narrow and wide Hbeta channels, respectively. Objects: ------------------------------------------------ RA (2000) DE Designation(s) ------------------------------------------------ 19 59 25.3 +58 33 20 HD 239276 = BD+58 2025 19 57 11.0 +58 36 12 HD 239265 = BD+58 2017 19 56 19.1 +56 41 13 HD 189296 = BD+56 2331 ------------------------------------------------ File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 64 138 HD 239276 Stroemgren differential photometry made in 1986-1987 at Sierra Nevada Observatory table3.dat 18 101 HD 239276 differential Johnson V magnitude made in 2001 at Xinglong Station table4.dat 64 582 HD 239276 Stromgren differential photometry made in 2001 at Sierra Nevada Observatory
See also: J/A+A/450/715 : Differential uvby photometry of HD 218427 (Rodriguez+, 2006) Byte-by-byte Description of file: table2.dat table4.dat
Bytes Format Units Label Explanations
1- 8 F8.4 d DHJD Heliocentric Julian date until origin (1) 10- 16 F7.4 mag Dumag Differential u magnitude (2) 18- 24 F7.4 mag Dvmag Differential v magnitude (2) 26- 32 F7.4 mag Dbmag Differential b magnitude (2) 34- 40 F7.4 mag Dymag Differential y magnitude (2) 43- 48 F6.4 mag Db-y Differential b-y colour index (2) 50- 56 F7.4 mag Dm1 Differential m1 colour index (2) 58- 64 F7.4 mag Dc1 Differential c1 colour index (2)
Note (1): The origin of time is JD 2446623 for table2, and JD 2452163 for table4 Note (2): In the sense variable minus comparison. Comparison star is HD 239265 for table2, and HD 189296 for table4.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
4- 10 F7.4 d DHJD Heliocentric Julian date minus 2452163. 12- 18 F7.4 mag DVmag Differential Johnson V magnitude (1)
Note (1): Magnitude differences DV to one comparison star in the same CCD frame than the variable.
Acknowledgements: Eloy Rodriguez, eloy(at)iaa.es
(End) Patricia Vannier [CDS] 06-Jun-2006
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact