LAMOST
n Pilot survey: 2011.10 - 2012.5 n Phase-I Regular survey: 2012.10 – 2017.6 n Phase-II Pilot survey: 2017.9-2018.6 n Phase-II Regular survey: 2018.9-present (low- + intermediate-resolution) n Phase II development (a new fiber system + a new site)? In pilot survey and phase-I regular survey, LAMOST has collected nearly 9 million spectra, including over two hundred thousand spectra of extra-galactic objects (galaxy and qso) and nearly 7.5 million qualitied (SNR > 10) spectra of star.
Comments
Comments — continued
Multi-channel Photometric Survey Telescope — MEPHISTO
Massively multiplexed spectroscopy with MSE: Science,
Project and Vision, 2019/02/26, Tucson, USA
MEPHISTO in one sentence: MEPHISTO, a 1.6m multi-channel survey telescope, first of its type in the world, will deliver real-time, high-quality colours of unprecedented accuracy for celestial objects, enable fast and robust classification of transients and variables, and deliver, for the first time, a panchromatic documentary of our evolving universe. �
The power of colours: à Physical quantities (Teff, log g, [Fe/H] …… ) à Fast & transient robust identification & classification
for follow-up observation
MEPHISTO features: • Real-‐5me colours (and varia5ons) for iden5fica5on & classifica5on;
• Superb colour accuracies, 0.2-‐0.5%;
• Fast survey speed, 1800 deg2 in 3 bands per night;
• A (SkyMapper) filter set op5mized for stellar astrophysics
• A high al5tude site for high UV transmission
• CCD sensors op5mized for the whole op5cal wavelength range
Massively multiplexed spectroscopy with MSE: Science,
Project and Vision, 2019/02/26, Tucson, USA
Blue camera u/v�
Yellow camera g/r�
Red
cam
era
i/z�
Cubic prisms �
Astigmatism for convergent light �
MEPHISTO LSST 1.4 Gigapix 3.2 Gigapix
3 × 3.14 deg2 9.6 deg2
0.286′′/pixel 0.2′′/pixel