- K. G. Strassmeier, I. Ilyin, M. Weber, A. Järvinen, S. Järvinen, A. Mott, M. Steffen, C. Mack III, D., Sablowski, A. Liermann, M., Mallonn, T. Carroll, & J. Storm
First spectra with the Potsdam Echelle Polarimetric and Spectroscopic Instrument
- K. G. Strassmeier, I. Ilyin, M. Steffen, E. Dineva, C. Denker
A spectrum of the Sun
- K. G. Strassmeier, I. Ilyin, M. Weber
PEPSI deep spectrum library
- K. G. Strassmeier, P. Gabor, I. Ilyin, C. Corbally, A. Järvinen, S. Järvinen, D. Sablowski, T. A. Carroll, M. Weber
The VATT-PEPSI connection
- C. Mack III, K. G. Strassmeier, I. Ilyin, S. Schuler, F. Spada
A chemical analysis of the ancient planet-host star Kepler-444
- I. Ilyin
PEPSI data reduction
- I. Ilyin, A. Järvinen, K. G. Strassmeier, M. Weber, M. Woche, F. Dionies
Preparing for PEPSI polarimetry
- S. P. Järvinen, T. A. Carroll, D. P. Sablowski, K. G. Strassmeier, I. Ilyin
First Doppler images with PEPSI
- M. Mallonn, E. Keles, K. G. Strassmeier
Exoplanet spectroscopy with LBC, MODS and PEPSI: Silicate aerosols in the atmosphere of the hot Jupiter HAT-P-32b
- J. Tayar (OSU), et al.
Tests of Convective Zone Radial Differential Rotation in Intermediate Mass Core Helium Burning Stars with PEPSI
The installation of PEPSI at the LBT was completed on September 6th when both its polarimeters were mounted in the straight foci of the LBT. During the night of September 10, 2017 the telescope was pointed to the magnetic standard star gamma Equ and a series of integrations in circularly and linearly polarized light were obtained. These spectra have a spectral resolution of R=120,000, covered four wavelength regions in the optical (two always simultaneously) and reached a S/N ratio of up to 600:1 in 6 min integrations. The telescope was just tracking and not guiding yet nor were the wavefront sensors actively collimating the telescopes. The image quality was controlled by eye (by John Hill remotly from Tucson). Because the polarimeters for each of the LBT telescopes are identical and modular in design, circular and linear polarization may be obtained simultaneously. We used the SX side for circular and the DX side for linear polarization. A total of 12 exposures were obtained.
August 21, 2017. The partial solar eclipse was observed at Mt.Graham in Arizona remotely from AIP with the Solar Disk Integrated Telescope (SDI) which guides on the Sun and feeds the light into the PEPSI high-resolution spectrograph in the pier of the LBT telescope. The partial eclipse began on 09:16 MST and ended at 12:03 MST.
One hundred spectra were obtained during the course of the eclipse in two wavelength regions 422-477 and 536-628 nm with the resolving power 270 000 (1100 m/s in radial velocity per resolution element). The spectra obtained are highly dynamic as the area of the line formation changes, hence, the shape of the lines is slightly alternating. We perform analysis of the Sodium D1 line 589.59 nm which is formed in the lower chromosphere of the Sun above 500 km of its photosphere. Its bisector (i.e. the central wavelength at different depths of the line profile) shows large changes in the line core which is formed in the higher chromospheric layers.
The poster shows the optical spectrum of Epsilon Eridani obtained with the Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) of the Large Binocular Telescope (LBT).
The poster shows the optical spectrum of Arcturus obtained with the Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) of the Large Binocular Telescope (LBT).
The poster shows the optical spectrum of the Sun obtained with the Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) of the Large Binocular Telescope (LBT) recorded just like the Sun-as-a-star.
In a recent paper one spectrum of HSS 348 taken with the 2 × 8.4 m Large Binocular Telescope (LBT) during commissioning of the PEPSI spectrograph is presented.
Waveguide image Slicer v3 manufactured by IOF Jena was installed by M.Weber and M.Woche on week 47, November 2016.