NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-24 T09:07:28 PDT
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Redshift data point(s) for object NGC 1023A

4 redshift data point(s) found in NED.


No.Frequency Targeted km/s +/- unc z +/- uncReference Code
0   743   1   0.002478   0.000003   1984MNRAS.207..173D
1 Optical 743   3   0.002478   0.000010   1999ApJS..121..287H
2 21-cm HI line 743   10   0.002478   0.000033   1991RC3.9.C...0000d
3 Optical lines 742   60   0.002475   0.000200   1991RC3.9.C...0000d
4 Optical 742     0.002475     1992CORV..C...0000F

Detailed information for each entry

No. 1
Name in publication  : NGC 1023A                     
Coordinates          : 023729.4                 385039.          B1950
Features targeted    : Optical                       
Velocity or redshift :  743            km/s                     z=   0.002478
Uncertainty          : +/-3                                     +/-  0.000010
Unc. Significance    : uncertainty
Reference Code       : 1999ApJS..121..287H

Measurement Mode     :
    Spectral range   : Optical
    Technique        : Cross-correlation fit to template spectrum
    Spatial mode     : Redshift is systemic

Reference Frame      : Heliocentric velocity or redshift
Qualifiers           : Homogenized from new and previously published data

NED Comment          :                                         



No. 2 Name in publication : NGC 1023A Coordinates : 023729.4 +385038 B1950 Features targeted : 21-cm HI line Velocity or redshift : 743 km/s z= 0.002478 Uncertainty : +/-10 +/- 0.000033 Unc. Significance : rms uncertainty Reference Code : 1991RC3.9.C...0000d Measurement Mode : Spectral range : Radio Reference Frame : Heliocentric velocity or redshift Qualifiers : Homogenized from new and previously published data NED Comment :


No. 3 Name in publication : NGC 1023A Coordinates : 023729.4 +385038 B1950 Features targeted : Optical lines Velocity or redshift : 742 km/s z= 0.002475 Uncertainty : +/-60 +/- 0.000200 Unc. Significance : rms uncertainty Reference Code : 1991RC3.9.C...0000d Measurement Mode : Spectral range : Optical Reference Frame : Heliocentric velocity or redshift Qualifiers : Homogenized from new and previously published data NED Comment :


No. 4 Name in publication : NGC 1023A Coordinates : 023729.4 +385038. B1950 Features targeted : Optical Velocity or redshift : 742 km/s z= 0.002475 Uncertainty : No uncertainty given Unc. Significance : no unc. reported Reference Code : 1992CORV..C...0000F Measurement Mode : Spectral range : Optical Reference Frame : Heliocentric velocity or redshift Qualifiers : From reprocessed raw data NED Comment : From 1986A&A...169...54C



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