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Arp151
Alternate Names:
 Mrk40
  WFC3, UVIS, F547M
RA = 11:25:36.2   Dec = +54:22:57   z = 0.02109
DL =  89.2 Mpc     DA =  85.6 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): 		0.505 (+ 0.062/- 0.067)   (107 Msun)
0.470 (+ 0.046/- 0.047)   (107 Msun)
MBH (RM modeling):
 0.661 (+ 0.152/- 0.124)   (107 Msun)
Pancoast et al. 2018 ApJ, 856, 108


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
54506 - 54618
...
1.36
(+0.79/-0.73)
1.47
(+0.98/-0.98)
1412
(+/- 76)
3210
(+/- 200)
Bentz et al. 2010 ApJ, 716, 993
42.48
(+/- 0.11)
Bentz et al. 2013 ApJ, 767, 149
Hγ
λ4340
56998 - 57178
...
7.25
(+1.47/-1.29)
5.63
(+0.73/-1.22)
...
...
Valenti et al. 2015 ApJ, 813, 36
...
He II
λ4686
54506 - 54618
...
-0.68
(+1.02/-1.22)
0.24
(+0.98/-0.24)
2220
(+/- 106)
6000
(+/- 865)
Bentz et al. 2010 ApJ, 716, 993
42.48
(+/- 0.11)
Bentz et al. 2013 ApJ, 767, 149
He II
λ4686
56998 - 57178
...
1.79
(+4.06/-2.53)
0.98
(+4.65/-1.71)
...
...
Valenti et al. 2015 ApJ, 813, 36
...
Hβ
λ4861
54506 - 54618
3.60
(+0.70/-0.20)
Grier et al. 2013 ApJ, 773, 90
3.99
(+0.49/-0.68)
3.43
(+0.73/-0.24)
1252
(+/- 46)
2357
(+/- 142)
Bentz et al. 2008 ApJ, 689, L21
42.48
(+/- 0.11)
Bentz et al. 2013 ApJ, 767, 149
Hβ
λ4861
56998 - 57178
...
7.37
(+1.40/-1.04)
5.63
(+1.77/-0.98)
879
(+/- 57)
1833
(+/- 61)
Valenti et al. 2015 ApJ, 813, 36
...
He I
λ5876
54506 - 54618
...
0.01
(+1.02/-0.84)
-0.24
(+2.20/-1.22)
1986
(+/- 178)
3784
(+/- 1080)
Bentz et al. 2010 ApJ, 716, 993
42.48
(+/- 0.11)
Bentz et al. 2013 ApJ, 767, 149
Hα
λ6563
54506 - 54618
...
7.84
(+1.03/-0.98)
8.32
(+0.24/-0.98)
937
(+/- 34)
1859
(+/- 142)
Bentz et al. 2010 ApJ, 716, 993
42.48
(+/- 0.11)
Bentz et al. 2013 ApJ, 767, 149
Hα
λ6563
56998 - 57178
...
13.60
(+1.36/-1.38)
13.22
(+3.92/-3.67)
...
...
Valenti et al. 2015 ApJ, 813, 36
...
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.