AVA AGN Variability Archive

Mrk 817

Simbad | NED | Bentz DB

RA (h:m:s)    DEC (d:m:s)       RA (deg)     DEC (deg):
14:36:22.07   +58:47:39.37       219.09195      58.79427

Basic Information

Redshift 0.031328
E(B-V) 0.006 Schlafly & Finkbeiner (2011)
E(B-V) 0.007 Schlegel et al., (1998)
NH 1.074 x1020 cm-2 HI4PI Collaboration et al. (2016)
E(B-V) 0.014 Watson (2011)
Black Hole Mass 7.6 M⊙ Bentz & Katz (2015)
log(L5100) 43.78 erg/s Bentz & Katz (2015)
log(LBol) 45.03 erg/s kbol=17.62, Netzer (2019)
LEdd 0.205 (caution)
Lag u-g days (theoretical)
Lag u-zs days (theoretical)

Photometric Data Summary

Facility Cadence
(days)		 Start
(MJD)		 End
(MJD)
Swift 1.26 2009-06-14 2021-07-06
LCO 0.92 2020-06-24 2024-04-15

Spectroscopic Data Summary

Facility Cadence
(days)		 Epochs Start
(MJD)		 End
(MJD)
LCO 1.71 197 2020-06-06 2024-04-16

Data Citation

  • Kara et al. 2021, ApJ, 922, 511

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

    Photometry breakdown

    • LCO B V u g r i z -- --
      #Epochs 2232 2209 2146 3451 3217 3162 3291 -- --
      Mean Mag (AB)
      Last 10 days      		 14.34 13.85 14.17 14.32 13.59 13.58 13.66 -- --
      Fractional
      Variability      		 13.367% 10.827% 16.018% 4.954% 9.500% 7.612% 5.082% -- --
    • Swift X-rays UVW2 UVM2 UVW1 U B V -- --
      #Epochs 0 181 361 167 168 166 171 -- --
      Mean Mag (AB)
      Last 10 days      		 0.00 14.90 14.82 14.59 14.33 14.47 14.32 -- --