[[Image(miri_fm_filterwheel.jpg, left, 220px)]][[Image(teaser.jpg, 140px)]][[Image(simple_loop.gif, 180px)]][[Image(CIAO.jpg, 140px)]][[Image(MATISSE.jpg, 160px)]][[Image(linc_nirvana_labor.jpg, 320px)]][[Image(PACS-Chopper.jpg, 200px)]]

The [wiki:WikiStart AstroTechTalk (ger)] offers a place to discuss, for '''all interested colleagues''' and especially for the technical departments, the project leaders, the administration and the scientists as the ultimately users:

 * status of instrumentation projects
 * scientific tasks and features of the instruments in construction or planned
 * new possible involvements
 * technical innovations and developments
 * technical problems and their solutions
 * logistical problems and their solutions
 * how to improve operation and observation
 * project standards.

'''Time: Always Fridays 11:00 - 12:00 (during the construction work: 10:00 - 11:00)'''

'''Location: MPIA Hoersaal (during the construction work: HdA Auditorium)'''

'''Outline:'''

 * Announcements (news, visitors, etc.) (mainly in German)
 * Talk of about 30 min about a selected topic (German or English, will be announced)
 * Follow up discussion and questions (German or English, depending on the speaker)

[[BR]]Proposals for talks: Please send an email to "hofferbert -at- mpia.de" or "naranjo -at- mpia.de" - alternatively you might reach us by phone (06221-528209 or -290) or in person (room 211 or 018) at MPIA.

||'''Date''' ||'''Speaker    ''' ||'''Topic''' ||
|| '''28.09.2018[[BR]](11hrs, MPIA Hoersaal)''' || '''Prashant Pathak (ESO)''' || '''Closed-loop correction of  atmospheric dispersion for high-contrast coronography and astrometry'''[[BR]][[BR]]On ground-based telescopes employing adaptive optics (AO) systems,  atmospheric dispersion compensation is essential to deliver high-quality  imaging, and critical for coronagraphy and high-precision astrometry.  Imperfect compensation by  an atmospheric dispersion compensator (ADC) can be addressed with a  high-precision on-sky measurement of residual dispersion in a  closed-loop control scheme. [[BR]][[BR]]In this talk, Prashant Pathak will present a focal plane  based technique, which utilizes the chromatic scaling of speckles  to measure residual dispersion (atmospheric and optical) in the final  science image. The residual dispersion can be accurately measured and  subsequently corrected in a closed-loop control. On-sky residual  dispersion of < 1 mas across H-band was demonstrated,  which reduced from 8.4 mas before closing the loop.[[BR]][[BR]]Presentation: English[[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/AlteVortraege2018S2/2018-09-28_HCI_ESO.pdf Slides: English][[BR]]Questions: German, English ||
|| 05.10.2018 || || ||
|| 12.10.2018[[BR]](11hrs, MPIA Hoersaal) || Hans-Ulrich Kaeufl (ESO) || NEAR - Planet search around Alpha Centauri with VISIR ||
|| 19.10.2018 || || ||
|| 26.10.2018[[BR]](11hrs, MPIA Hoersaal) || Armin Huber || Slide-Show - Life at VLT ||
|| 02.11.2018 || -- || Bridging day after All Saints's Day ||
|| 09.11.2018 || || ||
|| 16.11.2018 || || ||
|| 23.11.2018 || || ||
|| 30.11.2018 || || ||
|| 07.12.2018 [[BR]](11hrs, MPIA Hoersaal) || Wolfgang Brandner || Test of general relativity with GRAVITY ||
|| 14.12.2018 || || ||
|| 21.12.2018 || || ||
|| 28.12.2018 || -- || Christmas Break ||

'''Preview:'''

xx.xx.2019 - Speaker: Topic

'''Postview:'''

[wiki:OldPresentations2014S2 Presentations from 12.09. - 31.12.2014]

[wiki:OldPresentations2015S1 Presentations from 01.01. - 31.07.2015]

[wiki:OldPresentations2015S2 Presentations from 01.08. - 31.12.2015]

[wiki:OldPresentations2016S1 Presentations from 01.01. - 31.07.2016]

[wiki:OldPresentations2016S2 Presentations from 01.08. - 31.12.2016]

[wiki:OldPresentations2017S1 Presentations from 01.01. - 31.07.2017]

[wiki:OldPresentations2017S2 Presentations from 01.08. - 31.12.2017]

[wiki:OldPresentations2018S1 Presentations from 01.01. - 31.07.2018]

[wiki:OldPresentations2018S2 Presentations 2018S2]