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HIgh cadence Transient Survey / HITS

F. Förster, J.C. Maureira, J. San Martín, G. Cabrera, J. Littín, E. Vera (CMM), M. Hamuy, S. González-Gaitán, Ll. Galbany, Th. de Jaeger (DAS), J. Anderson (ESO), G. Pignata (UNAB), and R. Chris Smith (CTIO)

The HIgh cadence Transient Survey (HITS) is a survey looking for fast optical transients in the southern sky using the Dark Energy Camera (DECam). HITS spans more than 120 square degrees of sky which vary depending on the time of the year when the observations are performed.

HITS has been running since 2013 in two different observing runs during contiguous nights close to new Moon. In 2013A we observed 120 square degrees with a cadence of two hours in the u' band during 4 contiguous nights. In 2014A we also observed 120 square degrees with a cadence of two hours, but in the g' band and during 5 contiguous nights. In 2014A we were able to process the data in real time, i.e. each observation was processed in less than one exposure time after the observation was performed, and we were able to discover more than 12 very young supernovae, hundreds of new variable stars and thousands of new asteroids.

Supernova discovered by HITS during the 2014A run.

Asteroid detected by HITS moving across one DECam CCD. The asteroid was detected in 8 different positions, separated by 2 hours during two different nights and by the daylight period between positions 4 and 5.

Eclipsing star discovered by HITS.

Pulsating RR Lyrae star discovered by HITS.

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