The 1.23m CAHA telescope: combining upgrades and scientific observations

J. Gorosabel1,2,3*, P.Kubánek1,4,5, O. Lara-Gil1, M. Jelínek1, S. Guziy1, N. Morales1, A. J. Castro-Tirado1, A. de Ugarte Postigo1,6, C. C. Thӧne1, J. C. Tello1, R. Sanchéz-Ramírez1, S. Castillo-Carrión7, N. Huélamo8, V. Terrón1, J. L. Ortiz1, M. Fernández1, S. Mottola9, S. Hellmich9, G. Hahn9, R. Cunniffe1, V. Peris10, U. Carsenty9
1Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, 18008 Granada, Spain
2Unidad Asociada Grupo Ciencia Planetarias UPV/EHU-IAA/CSIC, Departmento de Física Aplicada I, E.T.S. Ingeniería, Universidad del País Vasco UPV/EHU, Alameda de Urquijo s/n, E-48013 Bilbao, Spain
3Ikerbasque, Basque Foundation for Science, Alameda de Urquijo 36-5, E-48008 Bilbao, Spain
4Imaging Processing Laboratory (IPL), University of Valencia, 46010 Valencia, Spain
5Institute of Physics, Academy of Sciences Czech Republic, Prague, Czech Republic
6Dark Cosmology Centre, Niels Bohr Institute, Juliane Maries Vej 30, Copenhagen Ø, 2100, Denmark
7Universidad de Málaga, 29071 Málaga, Spain
8LAEX-CAB (INTA-CSIC), LAEFF, P.O. Box 78, Villanueva de la Ca˜nada, 28691 Madrid, Spain
9Institute of Planetary Research, DLR, 12489 Berlin, Germany
10Observatori Astron´omic de la Universitat de Val`encia, Valencia, Spain

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Abstract

We discuss the current status of the control system upgrade of the 1.23m telescope of the Calar Alto observatory. We also show the most recent scientific observations. The upgrade of the 1.23m telescope is being done based on the Remote Telescope System, 2nd Version (RTS2). The fast-reaction response mode for GRB alerts (typically with response times below 3 minutes from the GRB onset) still needs some development. The auto-guider camera has not been implemented in RTS2 yet, so the telescope observations are limited to exposures shorter than ~4 minutes. We show the latest results of several high-energy events, mostly GRBs, followed up with human intervention during the testing phase of RTS2. We remark the very nice data gotten for GRB 101225A.

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Keywords : gamma-rays: bursts – telescopes