First observations with an H-band integrated optics beam combiner at the VLTI

Details First observations with an H-band integrated optics beam combiner at the VLTI First observations with an H-band integrated optics beam combiner at the VLTI

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004a%26a...424..719l&link_type=abstract

Astronomy and Astrophysics, v.424, p.719-726 (2004)

Astronomy and Astrophysics

Astrophysics

12

Techniques: Interferometric, Methods: Data Analysis, Instrumentation: Interferometers

Scientific paper

This paper reports results obtained with the Very Large Telescope Interferometer Commissioning Instrument (VLTI-VINCI) where the fiber interferometric coupler MONA was temporarily replaced by an integrated optics beam combiner (IONIC). The two-beam combiner operating in the H atmospheric band was tested at Paranal during two weeks in July 2002. Fringes were recorded on several stars with the siderostats and the Unit Telescopes (UT). We demonstrate that integrated optics allows beam combination with a high interferometric efficiency, stability and spatial filtering. The instrumental visibility of VLTI+IONIC is better than 85%, which is just 5% under the visibility of the IONIC device alone. During this run, the flux injection in the IONIC combiner was not optimized since we used the K-band MONA optics. However, we obtain fringes with the 35 cm siderostats on a star of magnitude mH=2.47 (κ2 Scl). It allows us to extrapolate a magnitude around mH˜6 with 8 m telescopes without adaptive optics and in the same poor injection conditions.
Based on observations collected at the European Southern Observatory, Paranal, Chile (public commissioning data).

Affiliated with

Also associated with

No associations

Rating

First observations with an H-band integrated optics beam combiner at the VLTI does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with First observations with an H-band integrated optics beam combiner at the VLTI, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First observations with an H-band integrated optics beam combiner at the VLTI will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1059454