Preparing the GREGOR solar telescope for night‐time use: Deriving a pointing model

Granzer, T.; Halbgewachs, C.; Volkmer, R.; Soltau, D.

doi:10.1002/asna.201211729

Cited by 5 publications

(5 citation statements)

References 8 publications

(4 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pointing to the Sun is automatic, based on ephemeris computation and an experimentally derived pointing model (Granzer et al 2012), i.e. without the use of a guider telescope.…”

Section: Telescope Control Systemmentioning

confidence: 99%

The 1.5 meter solar telescope GREGOR

et al. 2012

Self Cite

View full text Add to dashboard Cite

The 1.5 m telescope GREGOR opens a new window to the understanding of solar small-scale magnetism. The first light instrumentation includes the Gregor Fabry Pérot Interferometer (GFPI), a filter spectro-polarimeter for the visible wavelength range, the GRating Infrared Spectro-polarimeter (GRIS) and the Broad-Band Imager (BBI). The excellent performance of the first two instruments has already been demonstrated at the Vacuum Tower Telescope. GREGOR is Europe's largest solar telescope and number 3 in the world. Its all-reflective Gregory design provides a large wavelength coverage from the near UV up to at least 5 microns. The field of view has a diameter of 150 . GREGOR is equipped with a high-order adaptive optics system, with a subaperture size of 10 cm, and a deformable mirror with 256 actuators. The science goals are focused on, but not limited to, solar magnetism. GREGOR allows us to measure the emergence and disappearance of magnetic flux at the solar surface at spatial scales well below 100 km. Thanks to its spectro-polarimetric capabilities, GREGOR will measure the interaction between the plasma flows, different kinds of waves, and the magnetic field. This will foster our understanding of the processes that heat the chromosphere and the outer layers of the solar atmosphere. Observations of the surface magnetic field at very small spatial scales will shed light on the variability of the solar brightness.

show abstract

“…Pointing to the Sun is automatic, based on ephemeris computation and an experimentally derived pointing model (Granzer et al 2012), i.e. without the use of a guider telescope.…”

Section: Telescope Control Systemmentioning

confidence: 99%

The 1.5 meter solar telescope GREGOR

et al. 2012

Self Cite

View full text Add to dashboard Cite

show abstract

“…Master calibrations will be conducted during daytime (no telescope needed) and are www.an-journal.org not part of the night time line. Infrequent pointing models are scheduled by the operator in Potsdam (see Granzer et al 2012). At the end of the night the SCS moves the telescope to home position, closes the dome, and exits the interface to the telescope control system .…”

Section: Expected Performancementioning

confidence: 99%

Gregor@night: The future high‐resolution stellar spectrograph for the GREGOR solar telescope

et al. 2012

Self Cite

View full text Add to dashboard Cite

We describe the future night-time spectrograph for the GREGOR solar telescope and present its science core projects. The spectrograph provides a 3-pixel resolution of up to R = 87 000 in 45échelle orders covering the wavelength range 390-900 nm with three grating settings. An iodine cell can be used for high-precision radial velocity work in the 500-630 nm range. The operation of the spectrograph and the telescope will be fully automated without the presence of humans during night-time and will be based on the successful STELLA control system. Future upgrades include a second optical camera for even higher spectral resolution, a Stokes-V polarimeter and a link to the laser-frequency comb at the Vacuum Tower Telescope. The night-time core projects are a study of the angular-momentum evolution of "The Sun in Time" and a continuation of our long-term Doppler imaging of active stars.

show abstract

“…for the current epoch). Pointing models thatexist for equatorial (Spillar et al 1993;Buie 2003)and alt-azimuth mechanics (see e.g., Granzer et al 2012), as well as mathematical constructions, can be generated for both types of serial kinematics (Pál et al 2016). In addition, accurate pointing models can also be derived if only the attitude (orientation) of mount axes are known in respect to the vertical direction (Mészáros et al 2014).…”

Section: Introductionmentioning

confidence: 99%

A Hexapod Design for All-sky Sidereal Tracking

Pál

Mészáros

Jaskó

et al. 2016

PASP

View full text Add to dashboard Cite

In this paper we describe a hexapod-based telescope mount system intended to provide sidereal tracking for the Fly's Eye Camera project -an upcoming moderate, 21′′ /pixel resolution all-sky survey. By exploiting such a kind of meter-sized telescope mount, we get a device which is both capable of compensating for the apparent rotation of the celestial sphere and the same design can be used independently from the actual geographical location. Our construction is the sole currently operating hexapod telescope mount performing dedicated optical imaging survey with a sub-arcsecond tracking precision.

show abstract

Preparing the GREGOR solar telescope for night‐time use: Deriving a pointing model

Cited by 5 publications

References 8 publications

The 1.5 meter solar telescope GREGOR

The 1.5 meter solar telescope GREGOR

Gregor@night: The future high‐resolution stellar spectrograph for the GREGOR solar telescope

A Hexapod Design for All-sky Sidereal Tracking

Contact Info

Product

Resources

About