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تسجيل مستخدم جديدSIDE, a fiber fed spectrograph for the 10.4 m Gran Telescopio Canarias (GTC)
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F. Prada
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SIDE (Super Ifu Deployable Experiment) will be a second-generation, common-user instrument for the Grantecan (GTC) on La Palma (Canary Islands, Spain). It is being proposed as a spectrograph of low and intermediate resolution, highly efficient in multi-object spectroscopy and 3D spectroscopy. SIDE features the unique possibility of performing simultaneous visible and NIR observations for selected ranges. The SIDE project is leaded by the Instituto de Astrofisica de Andalucia (IAA-CSIC) in Granada (Spain) and the SIDE Consortium is formed by a total of 10 institutions from Spain, Mexico and USA. The SIDE Feasibility Study has been completed and currently the project is under revision by the GTC Project Office.
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SIDE (Super Ifu Deployable Experiment) is proposed as second-generation, common-user instrument for the GTC. It will be a low and intermediate resolution fiber fed spectrograph, highly efficient in multi-object and 3D spectroscopy. The low resolution
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argely by graduate students and postdocs, with help from the UF astronomy engineering group, and is funded by the University of Florida and the U.S. National Science Foundation. CIRCE is intended to help fill the gap in near-infrared capabilities prior to the arrival of EMIR to the GTC, and will also provide the following scientific capabilities to compliment EMIR after its arrival: high-resolution imaging, narrowband imaging, high-time-resolution photometry, imaging polarimetry, low resolution spectroscopy. In this paper, we review the design, fabrication, integration, lab testing, and on-sky performance results for CIRCE. These include a novel approach to the opto-mechanical design, fabrication, and alignment.
We report the analysis of the first deep optical observations of three isolated $gamma$-ray pulsars detected by the {em Fermi Gamma-ray Space Telescope}: the radio-loud PSR, J0248+6021 and PSR, J0631+1036, and the radio-quiet PSR, J0633+0632. The lat
ter has also been detected in the X rays. The pulsars are very similar in their spin-down age ($tau sim$40--60 kyrs), spin-down energy ($dot{E} sim10^{35}$ erg s$^{-1}$), and dipolar surface magnetic field ($B sim 3$--$5times10^{12}$ G). These pulsars are promising targets for multi-wavelength observations, since they have been already detected in $gamma$ rays and in radio or X-rays. None of them has been detected yet in the optical band. We observed the three pulsar fields in 2014 with the Spanish 10.4m Gran Telescopio Canarias (GTC). We could not find any candidate optical counterpart to the three pulsars close to their most recent radio or {em Chandra} positions down to $3 sigma$ limits of $gsim27.3$, $gsim27$, $gsim27.3$ for PSR, J0248+6021, J0631+1036, and J0633+0632, respectively. From the inferred optical upper limits and estimated distance and interstellar extinction, we derived limits on the pulsar optical luminosity. We also searched for the X-ray counterpart to PSR, J0248+6021 with chan but we did not detect the pulsar down to a 3$sigma$ flux limit of $5 times 10^{-14}$ erg cm$^{-2}$ s$^{-1}$ (0.3--10 keV). For all these pulsars, we compared the optical flux upper limits with the extrapolations in the optical domain of the $gamma$-ray spectra and compared their multi-wavelength properties with those of other $gamma$-ray pulsars of comparable age.
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