2019MNRAS.485.3595L

Query : 2019MNRAS.485.3595L

2019MNRAS.485.3595L - Mon. Not. R. Astron. Soc., 485, 3595-3599 (2019/May-3)

Towards a mid-infrared L band up-conversion interferometer: first on-sky sensitivity test on a single arm.

LEHMANN L., GROSSARD L., DELAGE L., REYNAUD F., CHAUVET M., BASSIGNOT F., MARTINACHE F., MORAND F., RIVET J.-P., SCHMIDER F.-X. and VERNET D.

Abstract (from CDS):

We report on the first on-sky sensitivity test on a single arm of the Astronomical Light Optical Hybrid Analysis (ALOHA) instrument, an uncooled up-conversion interferometer in the L band (3.5 µm). Despite a low coupling efficiency (in the range of 1 per cent) between the 1-m class telescope and our instrument, we detect a magnitude Lmag = 2.8 star with a signal-to-noise ratio SNR = 2.7 over a 30 min integration time and with a spectral resolution λ/Δλ = 100. As the ALOHA project aims to shift light from the L band to the near-infrared, the use of very low loss silica optical fibres is an important step towards fibre-linked very long-baseline interferometry in the mid-infrared.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

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

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2417 1
2 * gam Dra * 17 56 36.36988 +51 29 20.0242 5.630 3.760 2.230 1.08 0.23 K5III 581 1
3 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0V 2787 1
4 * del Cyg PM* 19 44 58.4769226339 +45 07 50.932673095 2.75 2.85 2.87 2.88 2.90 B9.5IV 303 0
5 * eta Cyg * 19 56 18.3718373206 +35 05 00.322387793 5.800 4.910 3.880 3.19 2.66 K0III 289 0

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