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NGC4151
Alternate Names:
  WFC3, UVIS, F547M
RA = 12:10:32.6   Dec = +39:24:21   z = 0.00332
D = 15.8 +/- 0.4 Mpc  method = Cepheids
DL =  13.9 Mpc     DA =  13.8 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): 		2.293 (+ 0.155/- 0.175)   (107 Msun)
2.368 (+ 0.150/- 0.166)   (107 Msun)
MBH (stellar dynamics):

MBH (gas dynamics):

 1.630 (+ 1.380/- 1.380)   (107 Msun)
Roberts et al. 2021 ApJ, 916, 25
3.000 (+ 0.800/- 2.200)   (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.
He II
λ1640
47497 - 47556
...
3.47
(+1.97/-1.61)
3.60
(+1.90/-3.50)
5013
(+/- 323)
5356
(+/- 1270)
Clavel et al. 1990 MNRAS, 246, 668

Metzroth et al. 2006 ApJ, 647, 901
...
He II
λ1640
48570 - 48598
...
2.60
(+1.10/-1.21)
1.50
(+1.20/-1.00)
4530
(+/- 92)
4597
(+/- 659)
Ulrich & Horne 1996 MNRAS, 283, 748

Metzroth et al. 2006 ApJ, 647, 901
...
C III]
λ1909
47497 - 47556
...
6.90
(+4.58/-3.83)
6.50
(+4.90/-3.90)
2553
(+/- 307)
2646
(+/- 745)
Clavel et al. 1990 MNRAS, 246, 668

Metzroth et al. 2006 ApJ, 647, 901
...
C III]
λ1909
48570 - 48598
...
3.45
(+1.52/-1.22)
3.60
(+2.00/-2.20)
2817
(+/- 81)
6997
(+/- 1366)
Ulrich & Horne 1996 MNRAS, 283, 748

Metzroth et al. 2006 ApJ, 647, 901
...
Mg II
λ2798
47497 - 47556
...
6.83
(+1.74/-2.10)
6.60
(+2.20/-1.60)
2581
(+/- 179)
4823
(+/- 1105)
Clavel et al. 1990 MNRAS, 246, 668

Metzroth et al. 2006 ApJ, 647, 901
...
Mg II
λ2798
48570 - 48598
...
5.35
(+1.87/-1.77)
4.60
(+2.80/-2.50)
2721
(+/- 141)
6458
(+/- 1850)
Ulrich & Horne 1996 MNRAS, 283, 748

Metzroth et al. 2006 ApJ, 647, 901
...
Hβ
λ4861
47145 - 47360
...
11.5
(+ 3.7/- 3.7)
10.0
(+ 6.0/- 4.0)
...
...
Maoz et al. 1991 ApJ, 367, 493

Peterson et al. 2004 ApJ, 613, 682
...
Hβ
λ4861
53430 - 53472
6.00
(+0.60/-0.20)
Zu et al. 2011 ApJ, 735, 80
6.59
(+1.12/-0.76)
6.10
(+1.20/-0.60)
2680
(+/- 64)
4711
(+/- 750)
Bentz et al. 2006 ApJ, 651, 775
42.09
(+/- 0.22)
Bentz et al. 2013 ApJ, 767, 149
Hβ
λ4861
55931 - 56071
6.58
(+0.19/-0.22)
De Rosa et al. 2018 ApJ, 866, 133
6.82
(+0.48/-0.57)
6.50
(+0.99/-1.39)
1940
(+/- 22)
4393
(+/- 110)
De Rosa et al. 2018 ApJ, 866, 133
42.32
(+/- 0.06)
Dalla Bonta et al. 2020 ApJ, 903, 112
Hα
λ6563
47145 - 47360
...
11.0
(+ 4.1/- 3.1)
10.0
(+ 4.0/- 4.0)
...
...
Maoz et al. 1991 ApJ, 367, 493

Peterson et al. 2004 ApJ, 613, 682
...
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.