2022RAA....22h1001L

Query : 2022RAA....22h1001L

2022RAA....22h1001L - Research in Astron. and astroph., 22, part no 8, 1001 (2022/August-1)

A Baseline Correction Algorithm for FAST.

LIU D.-J., XU Y., LI Y.-J., LIN Z.-H., BIAN S.-B. and HAO C.-J.

Abstract (from CDS):

The Five-hundred-meter Aperture Spherical radio Telescope (FAST) is the most sensitive ground-based, single-dish radio telescope on Earth. However, the original H I spectra produced by FAST are affected by standing waves. To maximize the power of FAST for high-sensitivity observations, we proposed an algorithm that combines fast Fourier transforms and extreme envelope curves to automatically correct the baselines of FAST H I spectra and remove standing waves from the baselines. This algorithm can reduce the amplified noise level caused by standing waves to a near-ideal level without losing signals or introducing false signals. The root mean square of the average baseline reaches ∼8 mK, approaching the theoretical sensitivity of an H I spectrum produced by FAST for an integration time of 335 minutes, i.e., ∼6 mK.

Abstract Copyright: © 2022. National Astronomical Observatories

Journal keyword(s): methods: observational - techniques: spectroscopic - telescopes ;

Simbad objects: 1

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Number of rows : 1
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 NGC 1985 RNe 05 37 47.8 +31 59 24           ~ 145 2

Query : 2022RAA....22h1001L

Basic data :
NGC 1985 -- Reflection Nebula
Other object types: otypes_help 		RNe (), IR (IRAS,RAFGL,...), PN (PK,PN), ISM (Ced,GN), V* (NSV), SFR (2022ApJ), Mas ([XT95]), Rad (Mol)
ICRS coord. (ep=J2000) : 		05 37 47.8 +31 59 24 (Middle-IR) [ 21000 7000 87 ] E 1988NASAR1190....1B
FK4 coord. (ep=B1950 eq=1950) : 		05 34 32.6 +31 57 40 [ 21000 7000 87 ]
Gal coord. (ep=J2000) : 		176.5167 +00.1820 [ 21000 7000 87 ]
VLSR : 		-18.60 -21.00 -16.20 [0.20] (mm) 1989A&AS...80..149W
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notes:

Identifiers (13) :
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NGC 1985 IRAS 05345+3157 PN ARO 28 [XT95] 5
Ced 57 Mol 11 PN VV' 33
GAL 176.51+00.20 NSV 2452 RAFGL 5157
GN 05.34.6 PK 176+00 1 WB89 671

References (145 between 1850 and 2026) (Total 145)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 1   

   

Observing logs
IUE : 2   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : NGC 1985

Link by name to the catalogue in VizieR :

NGC 1985 IRAS 05345+3157 NSV 2452 RAFGL 5157

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