AVA AGN Variability Archive

I Zw 1

Simbad | NED

RA (h:m:s)    DEC (d:m:s)       RA (deg)     DEC (deg):
00:53:34.94   +12:41:36.20       13.39558      12.69339

Basic Information

Redshift 0.061169
E(B-V) 0.055 Schlafly & Finkbeiner (2011)
E(B-V) 0.064 Schlegel et al., (1998)
NH 4.620 x1020 cm-2 HI4PI Collaboration et al. (2016)
E(B-V) 0.058 Watson (2011)
Black Hole Mass 6.97 M⊙ Huang et al. (2019)
log(L5100) 44.5 erg/s Huang et al. (2019)
log(LBol) 45.60 erg/s kbol=12.65, Netzer (2019)
LEdd 3.297 (caution)
Lag u-g days (theoretical)
Lag u-zs days (theoretical)

Photometric Data Summary

Facility Cadence
(days)		 Start
(MJD)		 End
(MJD)
LCO 0.96 2020-07-02 2024-02-25

Spectroscopic Data Summary

Facility Cadence
(days)		 Epochs Start
(MJD)		 End
(MJD)
LCO 10.80 42 2021-09-06 2024-02-23

Data Citation


Please use this reference if you use the this object data.

Photometric Light curves


Finding chart

Finding chart

Finding chart

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Photometry breakdown

  • LCO B V u g r i z -- --
    #Epochs 2020 2009 1971 1970 1937 1891 1864 -- --
    Mean Mag (AB)
    Last 10 days    		 14.92 14.30 15.34 14.63 14.18 13.67 13.60 -- --