Search Results - "Ramelli, Renzo"

Reconstruction of the Sunspot Number Source Database and the 1947 Zurich Discontinuity by Clette, Frédéric, Lefèvre, Laure, Bechet, Sabrina, Ramelli, Renzo, Cagnotti, Marco

“…The recalibration of the sunspot number series, the primary long-term record of the solar cycle, requires the recovery of the entire collection of raw sunspot…”
Get full text

Robotic and Non-Robotic Control of Astrophysical Instruments by Küveler, Gerd, Dao, Van Dung, Zuber, Axel, Ramelli, Renzo

“…We present a system of device control programs, developed for the solar observatory at Locarno/Switzerland (IRSOL). Because these programs are implemented as…”
Get full text

Sunspot Observations and Counting at Specola Solare Ticinese in Locarno Since 1957 by Cortesi, Sergio, Cagnotti, Marco, Bianda, Michele, Ramelli, Renzo, Manna, Andrea

“…Specola Solare Ticinese is an observatory dedicated to sunspot number counting. It was constructed in 1957 in Locarno, Southern Switzerland, as an external…”
Get full text

Reconstruction of the Sunspot Number Source Database and the 1947 Zurich Discontinuity by Clette, Frédéric, Lefèvre, Laure, Bechet, Sabrina, Ramelli, Renzo, Cagnotti, Marco

“…Solar Physics, Volume 296, Issue 9, article id.137, 2021 The recalibration of the sunspot number series, the primary long-term record of the solar cycle,…”
Get full text

Hanle rotation signatures in Sr I 4607 {\AA} by Zeuner, Franziska, Belluzzi, Luca, Guerreiro, Nuno, Ramelli, Renzo, Bianda, Michele

“…A&A 662, A46 (2022) Observations of scattering polarization and the Hanle effect in various spectral lines are increasingly used to complement traditional…”
Get full text

Robotic and Non-Robotic Control of Astrophysical Instruments by Küveler, Gerd, Dao, Van Dung, Zuber, Axel, Ramelli, Renzo

“…We present a system of device control programs, developed for the solar observatory at Locarno/Switzerland (IRSOL). Because these programs are implemented as…”
Get full text

Characterization of a thinned back illuminated MIMOSA V sensor as a visible light camera by Bulgheroni, Antonio, Bianda, Michele, Caccia, Massimo, Cappellini, Chiara, Mozzanica, Aldo, Ramelli, Renzo, Risigo, Fabio

“…This paper reports the measurements that have been performed both in the Silicon Detector Laboratory at the University of Insubria (Como, Italy) and at the…”
Get full text

Sunspot data collection of Specola Solare Ticinese in Locarno by Ramelli, Renzo, Cagnotti, Marco, Cortesi, Sergio, Bianda, Michele, Manna, Andrea

“…Sunspot observations and counting are carried out at the Specola Solare Ticinese in Locarno since 1957 when it was built as an external observing station of…”
Get full text

Measurement of the evolution of the magnetic field of the quiet photosphere during a solar cycle by Ramelli, Renzo, Bianda, Michele, Berdyugina, Svetlana, Belluzzi, Luca, Kleint, Lucia

“…The solar photosphere is filled by a magnetic field which is tangled on scales much smaller than the resolution capability of solar telescopes. This hidden…”
Get full text

Observations on spatial variations of the Sr~{\sc i} 4607~\AA~scattering polarization signals at different limb distances with ZIMPOL by Dhara, Sajal Kumar, Capozzi, Emilia, Gisler, Daniel, Bianda, Michele, Ramelli, Renzo, Berdyugina, Svetlana, Alsina, Ernest, Belluzzi, Luca

“…The Sr~{\sc i} 4607~\AA\ spectral line shows one of the strongest scattering polarization signals in the visible solar spectrum. The amplitude of this…”
Get full text

Spatial variations of the SrI 4607\AA scattering polarization signals at subgranular scale observed with ZIMPOL at GREGOR telescope by Dhara, Sajal Kumar, Capozzi, Emilia, Gisler, Daniel, Bianda, Michele, Ramelli, Renzo, Berdyugina, Svetlana, Alsina, Ernest, Belluzzi, Luca

“…Sr I 4607\AA spectral line shows one of the strongest scattering polarization signals in the visible solar spectrum. The amplitudes of these signals are…”
Get full text

Sunspot Observations and Counting at Specola Solare Ticinese in Locarno since 1957 by Cortesi, Sergio, Cagnotti, Marco, Bianda, Michele, Ramelli, Renzo, Manna, Andrea

“…Specola Solare Ticinese is an observatory dedicated to Sunspot Number counting, which was constructed in 1957 in Locarno, Southern Switzerland, as an external…”
Get full text

Helium Emissions Observed in Ground-Based Spectra of Solar Prominences by Ramelli, Renzo, Stellmacher, Goetz, Wiehr, Eberhard, Bianda, Michele

“…2012SoPh..281..697W The only prominent line of singly ionized helium in the visible spectral range, helium-II 4686 A, is observed together with the helium-I…”
Get full text

He-D3 Polarization observed in Prominences by Ramelli, Renzo, Bianda, Michele

“…Spectro-polarimetric measurements of the D3-HeI 5876 A line profile in 35 prominences have been performed in 2003 with the Gregory-Coud\'e Telescope in…”
Get full text

Scattering polarization and the Hanle effect in H-alpha as a probe of chromospheric magnetism: Modeling vs. Observations by Stepan, Jiri, Bueno, Javier Trujillo, Ramelli, Renzo, Bianda, Michele

“…The Hanle effect in strong spectral lines is the physical mechanism that should be increasingly exploited for quantitative explorations of the magnetism of the…”
Get full text

The power spectrum of the seeing during solar observations by Sigismondi, Costantino, Raponi, Andrea, Wang, Xiaofan, De Rosi, Giulia, Bianda, Michele, Ramelli, Renzo

“…Measurements of the power spectrum of the atmospheric seeing in the line of sight of the Sun, in the range 0.001-1 Hz, have been performed in Santa Maria degli…”
Get full text

Atmospheric fluctuations below 0.1 Hz during drift-scan solar diameter measurements by Sigismondi, Costantino, Raponi, Andrea, De Rosi, Giulia, Bianda, Michele, Ramelli, Renzo, Caccia, Massimo, Maspero, Matteo, Negrini, Loretta, Wang, Xiaofan

“…Measurements of the power spectrum of the seeing in the range 0.001-1 Hz have been performed in order to understand the criticity of the transits' method for…”
Get full text