AVA AGN Variability Archive

NGC 4151

Simbad | NED | Bentz DB

RA (h:m:s)    DEC (d:m:s)       RA (deg)     DEC (deg):
12:10:32.58   +39:24:20.63       182.63574      39.40573

Basic Information

Redshift 0.003326
E(B-V) 0.023 Schlafly & Finkbeiner (2011)
E(B-V) 0.027 Schlegel et al., (1998)
NH 2.119 x1020 cm-2 HI4PI Collaboration et al. (2016)
E(B-V) 0.027 Watson (2011)
Black Hole Mass 7.54 M⊙ Bentz & Katz (2015)
log(L5100) 43.2 erg/s Bentz & Katz (2015)
log(LBol) 44.56 erg/s kbol=23.02, Netzer (2019)
LEdd 0.081 (caution)
Lag u-g days (theoretical)
Lag u-zs days (theoretical)

Photometric Data Summary

Facility Cadence
(days)		 Start
(MJD)		 End
(MJD)
Swift 0.25 2005-12-26 2021-03-19
LCO 1.00 2016-01-08 2024-02-19

Spectroscopic Data Summary

Facility Cadence
(days)		 Epochs Start
(MJD)		 End
(MJD)
LCO 1.99 346 2016-01-12 2024-04-08

Data Citation

  • Edelson et al 2019, ApJ, 870, 123
  • Gonzalez-Buitrago et al 2021, in prep

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

    Photometry breakdown

    • LCO B V u g r i z -- --
      #Epochs 1297 1296 1425 1499 1470 1430 1410 -- --
      Mean Mag (AB)
      Last 10 days      		 12.00 11.63 11.90 11.78 11.22 11.33 11.23 -- --
      Fractional
      Variability      		 28.851% 20.313% 40.613% 27.705% 22.955% 23.856% 22.977% -- --
    • Swift X-rays UVW2 UVM2 UVW1 U B V -- --
      #Epochs 314 373 427 382 380 372 367 -- --
      Mean Mag (AB)
      Last 10 days      		 0.00 13.56 13.53 13.30 12.79 12.75 12.47 -- --