2017MNRAS.472.3230R

Query : 2017MNRAS.472.3230R

2017MNRAS.472.3230R - Mon. Not. R. Astron. Soc., 472, 3230-3245 (2017/December-2)

Short time-scale variables in the Gaia era: detection and characterization by structure function analysis.

ROELENS M., EYER L., MOWLAVI N., LECOEUR-TAIBI I., RIMOLDINI L., BLANCO-CUARESMA S., PALAVERSA L., SUVEGES M., CHARNAS J. and WEVERS T.

Abstract (from CDS):

We investigate the capabilities of the ESA Gaia mission for detecting and characterizing short time-scale variability, from tens of seconds to a dozen hours. We assess the efficiency of the variogram analysis, for both detecting short time-scale variability and estimating the underlying characteristic time-scales from Gaia photometry, through extensive light-curve simulations for various periodic and transient short time-scale variable types. We show that, with this approach, we can detect fast periodic variability, with amplitudes down to a few millimagnitudes, as well as some M dwarf flares and supernovae explosions, with limited contamination from longer time-scale variables or constant sources. Time-scale estimates from the variogram give valuable information on the rapidity of the underlying variation, which could complement time-scale estimates from other methods, like Fourier-based periodograms, and be reinvested in preparation of ground-based photometric follow-up of short time-scale candidates evidenced by Gaia. The next step will be to find new short time-scale variable candidates from real Gaia data, and to further characterize them using all the Gaia information, including colour and spectrum.

Journal keyword(s): methods: data analysis - methods: numerical - techniques: photometric - surveys - stars: variables: general - stars: variables: general

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	SN 2005hc	SN*	01 56 47.976	-00 12 48.62						SNIa	99	1

Query : 2017MNRAS.472.3230R

Basic data :

SN 2005hc -- SuperNova

SN* (2010ApJ,SN,...)

01 56 47.976 -00 12 48.62 (Optical) [ ] C 2010ApJ...722..566L

01 54 14.413 -00 27 26.27 [ ]

155.870566 -58.840703 [ ]

V(km/s) 13445 [150] / z(spectroscopic) 0.0459 [0.0005] / cz 13760 [150] C 2008AJ....135..348S

SNIa C 2015ApJS..220....9F

g 18.5 [~] D 2008yCat.2283....0B

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SN 2005hc SDSS-II SN 5944

References (99 between 1850 and 2026) (Total 99)
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