2023RAA....23k5008Y

Query : 2023RAA....23k5008Y

2023RAA....23k5008Y - Research in Astron. and astroph., 23, part no 11, 5008 (2023/November-0)

An Exposure Meter of Lijiang Fiber-fed High-Resolution Spectrograph.

YU X.-G., JI K.-F., ZHANG X.-L., CHANG L., CAI Y.-F., QIN Y. and SHANG Z.-H.

Abstract (from CDS):

In 2016, an exposure meter was installed on the Lijiang Fiber-fed High-Resolution Spectrograph to monitor the coupling of starlight to the science fiber during observations. Based on it, we investigated a method to estimate the exposure flux of the CCD in real time by using the counts of the photomultiplier tubes (PMT) of the exposure meter, and developed a piece of software to optimize the control of the exposure time. First, by using flat-field lamp observations, we determined that there is a linear and proportional relationship between the total counts of the PMT and the exposure flux of the CCD. Second, using historical observations of different spectral types, the corresponding relational conversion factors were determined and obtained separately. Third, the method was validated using actual observation data, which showed that all values of the coefficient of determination were greater than 0.92. Finally, software was developed to display the counts of the PMT and the estimated exposure flux of the CCD in real-time during the observation, providing a visual reference for optimizing the exposure time control.

Abstract Copyright: © 2023. National Astronomical Observatories

Journal keyword(s): telescopes - instrumentation: spectrographs - instrumentation: photometers

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 HD 189733 BY* 20 00 43.7129433648 +22 42 39.073143456 9.241 8.578 7.648 7.126 6.68 K2V 991 1

Query : 2023RAA....23k5008Y

Basic data :
HD 189733 -- BY Dra Variable
Other object types: otypes_help 		* (2013A&A,HD,...), PM* (2016ApJ,LSPM,...), X (2E,EXO,...), ** (**,WDS), BY* (2017ARep), V* (V*), NIR (2MASS), MIR (WISEA)
ICRS coord. (ep=J2000) : 		20 00 43.7129433648 +22 42 39.073143456 (Optical) [ 0.0097 0.0119 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		19 58 34.1039143802 +22 34 31.824983550 [ 0.0097 0.0119 90 ]
Gal coord. (ep=J2000) : 		060.9630654133127 -03.9222685127365 [ 0.0097 0.0119 90 ]
Proper motions mas/yr : 		-3.208 -250.323 [0.011 0.014 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -2.317 [0.0009] / z(spectroscopic) -0.000008 [0.000000] / cz -2.32 [0.00]
   (Opt) A 2018A&A...616A...7S
Parallaxes (mas): 		50.5668 [0.0162] A 2020yCat.1350....0G
Spectral type: 		K2V C 2003AJ....126.2048G
Fluxes (9) :
U 9.241 [~] C 2010MNRAS.403.1949K
B 8.578 [~] C 2010MNRAS.403.1949K
V 7.648 [~] C 2010MNRAS.403.1949K
R 7.126 [~] C 2010MNRAS.403.1949K
G 7.428371 [0.002770] C 2020yCat.1350....0G
I 6.68 [~] C 2010MNRAS.403.1949K
J 6.07 [0.03] C 2003yCat.2246....0C
H 5.59 [0.03] C 2003yCat.2246....0C
K 5.541 [0.021] C 2003yCat.2246....0C
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1 		Display criteria :

Identifiers (38) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 189733 GEN# +1.00189733 PPM 110211 V* V452 Vul
** BAK 1A GJ 4130 1RXS J200043.3+224240 WDS J20007+2243A
AG+22 2072 GSC 02141-00972 SAO 88060 WISEA J200043.63+224236.1
ASCC 807144 HD 189733A SKY# 37530 Wolf 864
BD+22 3887 HIC 98505 SPOCS 3132 YZ 22 7419
CNS5 4952 HIP 98505 TIC 256364928 Gaia DR3 1827242816201846144
2E 4311 LSPM J2000+2242 TOI-4470 Gaia DR2 1827242816201846144
2E 1958.5+2234 LTT 15851 TYC 2141-972-1 Gaia DR1 1827242811876888960
EXO 195834+2234.6 2MASS J20004370+2242391 USNO-B1.0 1127-00538857
GC 27741 NLTT 48568 uvby98 100189733

References (991 between 1850 and 2026) (Total 991)
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 : 6    Diameter : 2    Distance : 4    Var : 2    Rot : 10    Fe/H : 48    Plx : 5    PM : 8    SpT : 2   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Link by name to the catalogue in VizieR :

HD 189733 AG+22 2072 BD+22 3887 2E 4311 GJ 4130
GSC 02141-00972 HD 189733A HIC 98505 HIP 98505 LSPM J2000+2242
2MASS J20004370+2242391 NLTT 48568 PPM 110211 1RXS J200043.3+224240 SAO 88060
TYC 2141-972-1 USNO-B1.0 1127-00538857 uvby98 100189733 V* V452 Vul WDS J20007+2243A
WISEA J200043.63+224236.1 Gaia DR3 1827242816201846144 Gaia DR2 1827242816201846144 Gaia DR1 1827242811876888960

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