Access to Astronomical Catalogues

← Click to display the menu
J/MNRAS/478/2676      New white dwarf pulsators for TESS         (Bognar+, 2018)

Searching for new white dwarf pulsators for TESS observations at Konkoly Observatory. Bognar Zs., Kalup Cs., Sodor A., Charpinet S., Hermes J.J. <Mon. Not. R. Astron. Soc., 478, 2676-2685 (2018)> =2018MNRAS.478.2676B (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Stars, white dwarf ; Photometry, CCD Keywords: techniques: photometric - stars: individual: WD 1310+583, EGGR 120 - stars: interiors - stars: oscillations - white dwarfs Abstract: We present the results of our survey searching for new white dwarf pulsators for observations by the TESS space telescope. We collected photometric time-series data on 14 white dwarf variable candidates at Konkoly Observatory, and found two new bright ZZ Ceti stars, namely EGGR 120 and WD 1310+583. We performed a Fourier analysis of the datasets. In the case of EGGR 120, which was observed on one night only, we found one significant frequency at 1332uHz with 2.3mmag amplitude. We successfully observed WD 1310+583 on eight nights, and determined 17 significant frequencies in the whole dataset. Seven of them seem to be independent pulsation modes between 634 and 2740uHz, and we performed preliminary asteroseismic investigations of the star utilizing six of these periods. We also identified three new light variables on the fields of white dwarf candidates: an eclipsing binary, a candidate delta Scuti/beta Cephei and a candidate W UMa-type star. Description: We collected photometric time-series data on 14 white dwarf variable candidates at Konkoly Observatory, and found two new bright ZZ Ceti stars, namely EGGR 120 and WD 1310+583. We used the 1-m Ritchey-Chretien-Coude telescope at the Piszkesteto mountain station of Konkoly Observatory. We obtained data with an Andor iXon+888 EMCDD and an FLI Proline 16803 CCD camera in white light. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 78 14 *List of studied stars lc/* 29 14 Individual files for CCD observations at Konkoly Observatory
Note on stars.dat: parameters from table5 of the paper.
Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Star name 12- 13 I2 h RAh Right ascension (J2000) 15- 16 I2 min RAm Right ascension (J2000) 18- 22 F5.2 s RAs Right ascension (J2000) 24 A1 --- DE- Declination sign (J2000) 25- 26 I2 deg DEd Declination (J2000) 28- 29 I2 arcmin DEm Declination (J2000) 31- 34 F4.1 arcsec DEs Declination (J2000) 36- 46 A11 --- SpType Spectral type 48- 52 I5 K Teff Effective temperature 54- 57 F4.2 [cm/s2] logg Surface gravity 58 A1 --- n_logg [GBL] Note on logg and Teff (1) 60- 63 F4.1 mag TESSmag TESS magnitude 64- 66 A3 --- n_TESSmag Note on TESSmag 68- 78 A11 --- FileName Name of the light curve file in subdirectory lc
Note (1): References a sfollows: G = source of the original physical parameters is the database of Gianninas, Bergeron & Ruiz (2011, Cat. J/ApJ/743/138). We corrected these Teff and logg values according to the findings of Tremblay et al. (2013A&A...559A.104T) based on radiation-hydrodynamics three-dimensional simulations of convective DA stellar atmospheres L = source of the parameters was either Limoges, Bergeron & Lepine (2015, Cat. J/ApJS/219/19) B = Bergeron et al. (2011ApJ...737...28B)
Byte-by-byte Description of file: lc/*
Bytes Format Units Label Explanations
1- 17 F17.9 d BJD Barycentric Julian dates in Barycentric Dynamical Time (BJD_TDB) 19- 29 F11.8 mag Dmag Differential magnitude
Acknowledgements: Zsofia Bognar, bognar(at)
(End) Zsofia Bognar [Konkoly Obs.], Patricia Vannier [CDS] 27-Jul-2018
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

© Université de Strasbourg/CNRS

    • Contact