Performances of the LISA Spectrograph in Lulin Observatory

Hung-Chin Lin¹, Yu-Chi Cheng^1,2,3,4*, Li-Ching Huang^1,3, Chia-Lung Lin¹, Kang-Shian Pan¹, Wei-Jie Hou¹, Wing-Huen Ip^1,5,3

¹Institute of Astronomy, National Central University, Taoyuan, Taiwan
²Department of Physics, National Taiwan Normal University, Taipei, Taiwan
³Space Science Institute, Macau University of Science and Technology, Macau, Macau
⁴Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA), Observatoire de Paris, Paris, France
⁵Department of Space Science and Engineering, National Central University, Taoyuan, Taiwan

* Presenter:Yu-Chi Cheng, email:ycc312@g.ncu.edu.tw

The LISA spectrograph (F/5) is a new single slit spectrograph in Lulin observatory. This instrument is suitable for LOT, SLT, and even an amateur telescope in the TAOS site by connecting with a focal reducer (or extender). The current instrumental configuration includes a 300gr./mm grating blaze and an in-built Ar/Ne arc lamp for wavelength calibration. Implying with a 35 μm slit and considering the physical dimension and sensitivity of the primary CCD camera (QSI 660), the long axis of the 2D spectrum image can cover the wavelength between 400 and 850 nm with a spectral resolution of about 800. The limiting magnitude of a point source is around 16 under a 600 seconds un-binned single exposure. We had characterized this new spectrograph in late 2020 and will give a brief report in this presentation.

Keywords: optical observation, spectrometer, instrumental