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J/AJ/141/50    White-light flares on cool stars from Kepler  (Walkowicz+, 2011)

White-light flares on cool stars in the Kepler Quarter 1 data. Walkowicz L.M., Basri G., Batalha N., Gilliland R.L., Jenkins J., Borucki W.J., Koch D., Caldwell D., Dupree A.K., Latham D.W., Meibom S., Howell S., Brown T.M., Bryson S. <Astron. J., 141, 50 (2011)> =2011AJ....141...50W
ADC_Keywords: Stars, flare ; Stars, dwarfs ; Photometry ; Infrared sources Keywords: stars: emission-line, Be - stars: flare - stars: low-mass Abstract: We present the results of a search for white-light flares on ∼23000 cool dwarfs in the Kepler Quarter 1 long cadence data. We have identified 373 flaring stars, some of which flare multiple times during the observation period. We calculate relative flare energies, flare rates, and durations and compare these with the quiescent photometric variability of our sample. Description: The Kepler Quarter 1 long cadence data consist of 33.5 days of photometry sampled every 30 minutes, taken between 2009 May 13 and 2009 June 15. In this paper, we work from the raw simple aperture photometry provided in the publicly released Quarter 1 FITS files, under the APRAWFLUX keyword. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 87 373 KIC parameters of stars with detected flares table2.dat 47 373 Flare statistics
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) V/133 : Kepler Input Catalog (Kepler Mission Team, 2009) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 8 I8 --- KIC Kepler identification number 10- 11 I2 h RAh Hour of Right Ascension (J2000) 13- 14 I2 min RAm Minute of Right Ascension (J2000) 16- 20 F5.2 s RAs Second of Right Ascension (J2000) 22 A1 --- DE- Sign of the Declination (J2000) 23- 24 I2 deg DEd Degree of Declination (J2000) 26- 27 I2 arcmin DEm Arcminute of Declination (J2000) 29- 32 F4.1 arcsec DEs Arcsecond of Declination (J2000) 34- 39 F6.3 mag rmag SDSS r band magnitude 41- 46 F6.3 mag Jmag 2MASS J band magnitude 48- 53 F6.3 mag Kpmag Kepler K band magnitude 55- 59 F5.3 mag g-r ? SDSS (g-r) color index 61- 76 A16 --- 2MASS 2MASS identification (HHMMSSss+DDMMSSs) 78- 81 I4 K Teff Effective temperature 83- 87 F5.3 [cm/s2] log(g) Log of the surface gravity
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 8 I8 --- KIC Kepler identification number 10- 11 I2 --- Nfl Number of observed flares 13- 18 F6.3 [h] logEWp log median flare duration equivalent width (1) 20- 25 F6.3 [-] logDel log flare peak brightness ΔF/Fq (1) 27- 31 F5.3 h <Dur> Median duration 33- 38 F6.2 h t.q Time between flares 40- 43 F4.2 1/h Freq Flare frequency 45- 47 F3.1 % t.f Percent time spent flaring
Note (1): ΔF = (Ff-Fq)/Fq, where Ff and Fq denote the flaring and the quiescent flux, respectively. It is a differential quantity, independent of distance and measured relative to the quiescent star. The "flare duration equivalent width" is the photometric equivalent width for the flare, defined as EWp=∫ΔF.dt
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 24-Jul-2012
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

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