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NGC3227
Alternate Names:
  WFC3, UVIS, F547M
RA = 10:23:30.6   Dec = +19:51:54   z = 0.00386
D = 23.7 +/- 2.6 Mpc  method = SBF
DL =  16.1 Mpc     DA =  16.0 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): 		0.484 (+ 0.100/- 0.101)   (107 Msun)
0.484 (+ 0.100/- 0.101)   (107 Msun)
MBH (stellar dynamics):

MBH (gas dynamics):

 1.400 (+ 0.700/- 0.700)   (107 Msun)
Davies et al. 2006 ApJ, 646, 754
2.000 (+ 1.000/- 0.400)   (107 Msun)
Hicks & Malkan 2008 ApJ, 174, 31


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.
Hβ
λ4861
54180 - 54273
4.40
(+0.30/-0.50)
Zu et al. 2011 ApJ, 735, 80
3.75
(+0.76/-0.82)
2.99
(+2.00/-1.00)
1376
(+/- 44)
3578
(+/- 83)
Denney et al. 2010 ApJ, 721, 715
42.24
(+/- 0.11)
Bentz et al. 2013 ApJ, 767, 149
Hβ
λ4861
55933 - 56047
2.29
(+0.23/-0.20)
De Rosa et al. 2018 ApJ, 866, 133
1.29
(+1.56/-1.27)
1.74
(+1.69/-1.59)
1368
(+/- 38)
3837
(+/- 94)
De Rosa et al. 2018 ApJ, 866, 133
42.42
(+/- 0.05)
Dalla Bonta et al. 2020 ApJ, 903, 112
Hβ
λ4861
56661 - 56845
...
2.58
(+1.20/-1.31)
2.80
(+1.00/-1.60)
1428
(+/- 102)
2236
(+/- 437)
De Rosa et al. 2018 ApJ, 866, 133
...
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.

This object has excluded data.