2024AJ....168..208K

Query : 2024AJ....168..208K

2024AJ....168..208K - Astron. J., 168, 208 (2024/November-0)

Gemini High-resolution Optical Spectrograph (GHOST) at Gemini South: Instrument Performance and Integration, First Science, and Next Steps.

KALARI V.M., DIAZ R.J., ROBERTSON G., McCONNACHIE A., IRELAND M., SALINAS R., YOUNG P., SIMPSON C., HAYES C., NIELSEN J., BURLEY G., PAZDER J., GOMEZ-JIMENEZ M., MARTIOLI E., HOWELL S.B., JEONG M., JUNEAU S., RUIZ-CARMONA R., MARGHEIM S., SHEINIS A., ANTHONY A., BAKER G., BERG T.A.M., CAO T., CHAPIN E., CHIN T., CHIBOUCAS K., CHURILOV V., DEIBERT E., DENSMORE A., DUNN J., EDGAR M.L., HEO J., HENDERSON D., FARRELL T., FONT J., FIRPO V., FUENTES J., LABRIE K., LAMBERT S., LAWRENCE J., LOTHROP J., McDERMID R., MILLER B.W., PEREZ G., PLACCO V.M., PRADO P., QUIROZ C., RAMOS F., RUTTEN R., SILVA K.M.G., THOMAS-OSIP J., URRUTIA C., VACCA W.D., VENN K., WALLER F., WALLER L., WHITE M., XU S. and ZHELEM R.

Abstract (from CDS):

The Gemini South telescope is now equipped with a new high-resolution spectrograph called the Gemini High-resolution Optical SpecTrograph (GHOST). This instrument provides high-efficiency, high-resolution spectra covering 347-1060 nm in a single exposure of either one or two targets simultaneously, along with precision radial velocity spectroscopy utilizing an internal calibration source. It can operate at a spectral element resolving power of either 76,000 or 56,000, and can reach a signal-to-noise ratio of ∼5 in a 1 hr exposure on a V ∼ 20.8 mag target in median site seeing and dark skies (per resolution element). GHOST was installed on-site in 2022 June, and we report performance after full integration to queue operations in 2023 November, in addition to scientific results enabled by the integration observing runs. These results demonstrate the ability to observe a wide variety of bright and faint targets with high efficiency and precision. With GHOST, new avenues to explore high-resolution spectroscopy have opened up to the astronomical community. These are described, along with the planned and potential upgrades to the instrument.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): High resolution spectroscopy - Astronomical instrumentation - Optical observatories

Simbad objects: 11

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Number of rows : 11
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 HD 21693 PM* 03 27 12.4815289824 -58 19 25.249845108   8.715 7.94 8.00 8.61 G9IV-V 93 1
2 [VPW98] 1670 * 10 10 58.5798524304 -04 43 28.942225968   20.709 20.804     O3-5Vz 5 0
3 MCG-01-26-030 H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 789 2
4 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 2144 1
5 V* IK Hya RR* 12 04 47.2726101288 -27 40 43.272236172   10.46 10.23     B7IIkA3mA3 70 0
6 QSO J1215-0034 QSO 12 15 49.8117265224 -00 34 32.172841452   17.76 17.51     ~ 85 0
7 TYC 8254-1616-1 * 13 03 10.5015305208 -49 42 25.145695584   11.85 11.56     ~ 3 0
8 WASP-108 * 13 03 18.7183395120 -49 38 22.833324852   11.85 11.21     ~ 22 0
9 WASP-108b Pl 13 03 18.7183395120 -49 38 22.833324852           ~ 8 0
10 V* XX Oph AB* 17 43 56.4963178200 -06 16 08.744059236 10.51 9.79 8.96     M5IIe+Aep 151 0
11 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0

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