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182 papers
SDSS-IV MaStar: Determination of Stellar Parameters Using Bayesian Averaging
Yan-Ping Chen, Renbin Yan, Szabolcs Mészáros +12
We present the stellar parameters for 59,266 high-quality spectra of 24,130 unique stars from the MaNGA Stellar Library (MaStar) in the Sloan Digital Sky Survey (SDSS) Data Release…
Commissioning and on-sky performance of FiberPol: a fiber-fed spectropolarimetric system for the SAAO 1.9 m telescope
Siddharth Maharana, K. C. J. Dennison-Farrar, Sabyasachi Chattopadhyay +8
At the South African Astronomical Observatory (SAAO), we have developed FiberPol a spectropolarimetric front-end for the SpUpNIC spectrograph on the 1.9 m telescope fed by fiber…
A Slit Mask Integral Field Unit for the Robert Stobie Spectrograph on the Southern African Large Telescope: I. Instrument Development
Sabyasachi Chattopadhyay, Matthew A. Bershady, Michael P. Smith +2
Integral field spectroscopy (IFS) has been added as a new observation mode to the Robert Stobie Spectrograph (RSS), the workhorse multi-mode instrument on the Southern African Larg…
The NIRWALS instrument detrending software pipeline
Ralf Kotulla, Marsha Wolf, Matt Bershady
We describe the basic instrument detrending software for the NIRWALS spectrograph on the SALT telescope. Its basic purpose is to process multiple non-destructive reads of increasin…
On the role of non-circular motions in MaNGA galaxies I: global properties
Carlos Lopez-Coba, Lihwai Lin, Justus Neumann +1
Non-circular (NC) motions represent the imprints of non-axisymmetric structures in galaxies, providing opportunities to study the physical properties of gas departing from circular…
Light scrambling and focal ratio degradation of thin multimode fibers with different core geometries
Man-Yin Leo Lee, Zhiheng Lin, Chit-Ho Hui +6
The performance of fiber-fed astronomical spectrographs is highly influenced by the properties of fibers. The near-field and far-field scrambling characteristics have a profound im…