EMIR high-dynamic range readout modes

摘要

EMIR is the NIR imager and multiobject spectrograph being built as a common user instrument for the GTC and it iscurrently entering in the integration and verification phase at system level. EMIR is being built by a Consortium ofSpanish and French institutes led by the IAC.In this paper we describe the readout modes of EMIR detector, a Hawaii2 FPA, after two full calibrations campaigns.Besides the standard set of modes (reset-read, CDS, Fowler, Follow-up the ramp), the modified SDSU-III hardware andhome made software will also offer high dynamic range readout modes, which will improve the ability of the instrumentto sound densely populated areas which often are made of objects with large differences in brightness. These new highdynamic range modes are: single readout with very short integration time, window mode and combination of both. Theresults show that the new modes behave linearly with different exposition times, improve the maximum frame rate andincrease the saturation limit in image mode for EMIR instrument.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.