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NGC4253
Alternate Names:
 Mrk766
  WFC3, UVIS, F547M
RA = 12:18:26.5   Dec = +29:48:46   z = 0.01293
DL =  54.4 Mpc     DA =  53.0 Mpc
for  H0 = 72 km s-1 Mpc-1  ΩΛ = 0.7   ΩM = 0.3
< f > :
5.5
Onken+04
5.1
Park+12
4.8
Batiste+17
4.3
Grier+13
2.8
Graham+11
 Other 

MBH calculated using < f > =  4.3
MBH (Hβ only):
MBH (all lines): 		0.138 (+ 0.122/- 0.119)   (107 Msun)
0.664 (+ 0.081/- 0.082)   (107 Msun)


Reverberation Measurements
Line JD Range
(days)		 τJAV
(days)		 τJAV Ref. τcent
(days)		 τpeak
(days)		 σline
(km s-1)		 FWHM
(km s-1)		 RM Ref(s) log LAGN,5100
(ergs s-1)		 L Ref.
Hγ
λ4340
54509 - 54618
...
6.78
(+2.35/-3.23)
6.42
(+2.71/-2.96)
1259
(+/- 322)
3008
(+/- 2053)
Bentz et al. 2010 ApJ, 716, 993
42.51
(+/- 0.13)
Bentz et al. 2013 ApJ, 767, 149
Hβ
λ4861
54509 - 54618
5.40
(+0.20/-0.80)
Grier et al. 2013 ApJ, 773, 90
6.16
(+1.63/-1.22)
5.92
(+2.47/-0.99)
516
(+/- 218)
834
(+/- 1260)
Bentz et al. 2009 ApJ, 705, 199
42.51
(+/- 0.13)
Bentz et al. 2013 ApJ, 767, 149
Hα
λ6563
54509 - 54618
...
25.17
(+0.65/-0.85)
25.42
(+0.49/-0.99)
726
(+/- 35)
901
(+/- 150)
Bentz et al. 2010 ApJ, 716, 993
42.51
(+/- 0.13)
Bentz et al. 2013 ApJ, 767, 149
Note: Measurements are provided in the rest frame of the host galaxy. Line widths are measured in the variable (RMS) portion of the spectrum.

Researchers are advised to examine the details and make their own determination of the reliability of any datasets included here.