2009A&A...493..747L


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET12:54:27

2009A&A...493..747L - Astronomy and Astrophysics, volume 493, 747-752 (2009/1-2)

Post-processing the VLTI fringe-tracking data: first measurements of stars.

LE BOUQUIN J.-B., ABUTER R., HAGUENAUER P., BAUVIR B., POPOVIC D. and POZNA E.

Abstract (from CDS):

At the Very Large Telescope Interferometer, the purpose of the fringe-tracker FINITO is to stabilize the optical path differences between the beams, allowing longer integration times on the scientific instruments AMBER and MIDI. Our goal is to demonstrate the potential of FINITO for providing H-band interferometric visibilities, simultaneously and in addition to its normal fringe-tracking role. We use data obtained during the commissioning of the Reflective Memory Network Recorder at the Paranal observatory. This device has permitted the first recording of all relevant real-time data needed for a proper data-reduction. We show that post-processing the FINITO data allows valuable scientific visibilities to be measured. Over the several hours of our engineering experiment, the intrinsic transfer function is stable at the level of ±2%. Such stability would lead to robust measurements of science stars even without the observation of a calibration star within a short period of time. We briefly discuss the current limitations and the potential improvements.

Abstract Copyright:

Journal keyword(s): instrumentation: high angular resolution - instrumentation: interferometers - techniques: high angular resolution - techniques: interferometric

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * a Hya PM* 08 40 01.4718190176 -12 28 31.343313250   6.397 4.969     K3III 64 0
2 * alf Hya * 09 27 35.24270 -08 39 30.9583 5.14 3.42 1.97 0.93 0.16 K3IIIa 410 0
3 * N Vel V* 09 31 13.3189137 -57 02 03.757780   4.691 3.139     K5III 90 0
4 * iot Hya PM* 09 39 51.3614457 -01 08 34.113491 6.68 5.23 3.91 2.92 2.25 K2.5III 167 0
5 * eps Crt * 11 24 36.5904786153 -10 51 33.557849078   6.338 4.802     K4III 86 0
6 V* BK Vir AB* 12 30 21.0150535628 +04 24 59.159360514 9.60 8.82 7.28     M7-III: 135 0
7 * chi Vir ** 12 39 14.7669232892 -07 59 44.041075962   5.886 4.643 6.45   K2+IIICN0.5 136 1
8 * del Vir RG* 12 55 36.2086058 +03 23 50.893225 6.76 4.97 3.38 1.86 0.53 M3+III 260 0

    Equat.    Gal    SGal    Ecl

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2021.03.02-12:54:27

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