2013A&A...552A..31A


Query : 2013A&A...552A..31A

2013A&A...552A..31A - Astronomy and Astrophysics, volume 552A, 31-31 (2013/4-1)

CAFE: Calar Alto Fiber-fed Echelle spectrograph.

ACEITUNO J., SANCHEZ S.F., GRUPP F., LILLO J., HERNAN-OBISPO M., BENITEZ D., MONTOYA L.M., THIELE U., PEDRAZ S., BARRADO D., DREIZLER S. and BEAN J.

Abstract (from CDS):

We present here CAFE, the Calar Alto Fiber-fed Echelle spectrograph, a new instrument built at the Centro Astronomico Hispano Aleman (CAHA). CAFE is a single-fiber, high-resolution (R∼70000) spectrograph, covering the wavelength range between 3650-9800Å. It was built on the basis of the common design for Echelle spectrographs. Its main aim is to measure radial velocities of stellar objects up to V∼13-14mag with a precision as good as a few tens of m/s. To achieve this goal the design was simplified at maximum, removing all possible movable components, the central wavelength is fixed, as is the wavelength coverage; there is no filter wheel, etc. Particular care was taken with the thermal and mechanical stability. The instrument is fully operational and publically accessible at the 2.2m telescope of the Calar Alto Observatory. In this article we describe (i) the design, summarizing its manufacturing phase; (ii) characterize the main properties of the instrument; (iii) describe the reduction pipeline; and (iv) show the results from the first light and commissioning runs. The preliminar results indicate that the instrument fulfills the specifications and can achieve the planned goals. In particular, the results show that the instrument is more efficient than anticipated, reaching a signal-to-noise of ∼20 for a stellar object as faint as V∼14.5mag in ∼2700s integration time. The instrument is a wonderful machine for exoplanetary research (by studying large samples of possible systems cotaining massive planets), galactic dynamics (highly precise radial velocities in moving groups or stellar associations), or astrochemistry.

Abstract Copyright:

Journal keyword(s): instrumentation: spectrographs - methods: observational - methods: data analysis - techniques: spectroscopic

CDS comments: Table 5 KOI 561/KEPLER 561 could be a misprint for KOI-1561. THD 182572 could be a misprint for HD 182572. P330D not identified.

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 HD 124 * 00 06 12.0543037680 +51 22 06.099089268   9.47 8.43     K0 4 0
2 HD 90404 * 10 26 20.2234189344 +02 32 54.489352308   9.79 9.46     A5/7II 4 0
3 * 6 CVn PM* 12 25 50.9385584448 +39 01 07.016331180   5.95 5.01     G9III 138 0
4 BD+25 2534 HS* 12 37 23.5161671712 +25 03 59.867922240 9.117 10.26 10.59 10.642 10.809 sdB1(k) 231 0
5 HD 115404 PM* 13 16 51.0514297623 +17 01 01.840901307   7.69 6.66     K2V 264 0
6 HZ 44 HS* 13 23 35.2629445608 +36 07 59.544140304 10.186 11.42 11.65 12.00 11.995 sdBN0VIIHe28 402 0
7 HAT-P-12b Pl 13 57 33.4668726399 +43 29 36.601508739           ~ 158 1
8 HD 124292 PM* 14 12 45.2383276803 -03 19 12.303384159 8.072 7.783 7.039 6.634 6.265 G8/K0V 128 0
9 WASP-24b Pl 15 08 51.7366806893 +02 20 35.964406086           ~ 50 1
10 HD 139323 PM* 15 35 56.5662057046 +39 49 52.027054826   8.53   7.1   K3V 131 0
11 BD+33 2642 pA* 15 51 59.8854348048 +32 56 54.329485272 9.806 10.61 10.73 10.884 10.961 O7p 410 0
12 HD 151541 PM* 16 42 38.5765856163 +68 06 07.791412449   8.32   7.1   K1 124 0
13 HD 154345 PM* 17 02 36.4038090379 +47 04 54.764174452   7.50   6.3   G9 257 1
14 TrES-3 Pl 17 52 07.0185036683 +37 32 46.237002085           ~ 218 2
15 Kepler-1b Pl 19 07 14.0379171930 +49 18 59.090895318           ~ 313 2
16 Kepler-1B * 19 07 14.113 +49 18 58.29           K4.5-6 23 1
17 * b Aql PM* 19 24 58.1999714302 +11 56 39.888480530 6.35 5.93   4.7   G7IVHdel1 476 0
18 KOI-1561 EB* 19 44 08.0230591872 +40 01 10.562889432           ~ 25 0
19 HD 190404 PM* 20 03 52.1269218534 +23 20 26.469023374 8.490 8.080 7.270 6.759 6.314 K1V 227 0
20 BD+25 4655 HS* 21 59 41.9748629928 +26 25 57.403455672 8.27 9.39 9.68     sdO6 111 0

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2023.01.27-12:37:28

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