J/A+A/596/A40 Main-belt asteroids optical light curves (Szabo+, 2016) ================================================================================ Uninterrupted optical light curves of main-belt asteroids from the K2 Mission. Szabo R., Pal A., Sarneczky K., Szabo Gy.M., Molnar L., Kiss L.L., Hanyecz O., Plachy E., Kiss Cs. =2016A&A...596A..40S (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Minor planets ; Photometry Keywords: techniques: photometric - minor planets, asteroids: general Abstract: Because the second reaction wheel failed, a new mission was conceived for the otherwise healthy Kepler space telescope. In the course of the K2 mission, the telescope is staring at the plane of the Ecliptic. Thousands of solar system bodies therefore cross the K2 fields and usually cause additional noise in the highly accurate photometric data. We here follow the principle that some person's noise is another person's signal and investigate the possibility of deriving continuous asteroid light curves. This is the first such endeavor. In general, we are interested in the photometric precision that the K2 mission can deliver on moving solar system bodies. In particular, we investigate space photometric optical light curves of main-belt asteroids. We studied the K2 superstamps that cover the fields of M35, and Neptune together with Nereid, which were observed in the long-cadence mode (29.4min sampling). Asteroid light curves were generated by applying elongated apertures. We used the Lomb-Scargle method to determine periodicities that are due to rotation. Description: These files contain the photometric measurements of main-belt asteroids observed with the Kepler space telescope during the K2 Mission in the fields of the open cluster M35 and the Neptune/Nereid. Additionally, the observational data (start time, end time, length of observations, duty cycle, brightness) are listed, as well as rotational period and amplitude values determined from the K2 observations, where available. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file m35_aste.dat 80 867 Observational and rotational parameters of asteroids in the M35 field m35_list.dat 10 926 List of asteroids in the M35 field with photometry in m35_phot.dat file m35_phot.dat 35 47711 Photometry of 926 asteroids in the M35 field ner_aste.dat 80 88 Observational and rotational parameters of asteroids in the Nereid field ner_list.dat 10 96 List of asteroids in the Nereid field with photometry in ner_phot.dat file ner_phot.dat 35 6196 Photometry of 96 asteroids in the Nereid field -------------------------------------------------------------------------------- See also: B/astorb : Orbits of Minor Planets (Bowell+ 2014) Byte-by-byte Description of file: m35_aste.dat ner_aste.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 10 A10 --- Name Name of the asteroid 11- 19 F9.5 --- ObsS Beginning of observation (BJD-2456700) 21- 28 F8.4 --- ObsE End of observation (BJD-2456700) 30- 35 F6.4 d Length Length of observations 37- 39 I3 --- Nobs Number of observations 41- 45 F5.3 --- DC [0/1] Duty cycle of observations 47- 52 F6.3 mag Rmag USNO R brightness 54 A1 --- l_Per Limit flag on Per 55- 61 F7.3 h Per ? Rotational period 66- 70 F5.3 h e_Per ? Error of the rotation period 75 A1 --- l_Amp Limit flag on Amp 76- 80 F5.3 mag Amp ? Amplitude of variation -------------------------------------------------------------------------------- Byte-by-byte Description of file: m35_list.dat ner_list.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 10 A10 --- Name Name of the asteroid -------------------------------------------------------------------------------- Byte-by-byte Description of file: m35_phot.dat ner_phot.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 10 A10 --- Name Name of the asteroid 13- 20 F8.4 d Obs.date Time of observation (BJD-2456700) 23- 28 F6.3 mag Rmag Brightness, USNO R 31- 35 F5.3 mag e_Rmag Magnitude error, USNO R -------------------------------------------------------------------------------- Acknowledgements: Robert Szabo, rszabo(at)konkoly.hu ================================================================================ (End) Patricia Vannier [CDS] 26-Sep-2016