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Mrk142
Alternate Names:
 PG1022+519
  WFC3, UVIS, F547M
RA = 10:25:31.3   Dec = +51:40:35   z = 0.04494
DL =  193.5 Mpc     DA =  177.2 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): 		0.170 (+ 0.061/- 0.065)   (107 Msun)
0.197 (+ 0.045/- 0.042)   (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
54506 - 54618
...
2.86
(+1.22/-1.05)
2.63
(+1.67/-0.96)
1057
(+/- 82)
2547
(+/- 533)
Bentz et al. 2010 ApJ, 716, 993
43.54
(+/- 0.04)
Bentz et al. 2013 ApJ, 767, 149
Fe II opt
56237 - 56413
...
7.6
(+ 1.4/- 2.2)
...
...
...
Hu et al. 2015 ApJ, 804, 138
...
He II
λ4686
54506 - 54618
...
1.20
(+1.53/-1.99)
1.20
(+1.44/-1.91)
3079
(+/- 166)
8061
(+/- 1325)
Bentz et al. 2010 ApJ, 716, 993
43.54
(+/- 0.04)
Bentz et al. 2013 ApJ, 767, 149
Hβ
λ4861
54506 - 54618
...
2.74
(+0.73/-0.83)
2.63
(+0.96/-0.72)
859
(+/- 102)
1368
(+/- 379)
Bentz et al. 2009 ApJ, 705, 199
43.54
(+/- 0.04)
Bentz et al. 2013 ApJ, 767, 149
Hβ
λ4861
56237 - 56413
...
7.9
(+ 1.2/- 1.1)
5.3
(+ 2.6/- 2.2)
...
1623
(+/- 110)
Du et al. 2014 ApJ, 782, 45

Hu et al. 2015 ApJ, 804, 138
...
He I
λ5876
54506 - 54618
...
1.81
(+1.99/-1.20)
1.91
(+2.15/-1.44)
1128
(+/- 241)
5703
(+/- 3440)
Bentz et al. 2010 ApJ, 716, 993
43.54
(+/- 0.04)
Bentz et al. 2013 ApJ, 767, 149
Hα
λ6563
54506 - 54618
...
2.78
(+1.17/-0.88)
2.47
(+1.67/-0.48)
934
(+/- 61)
1262
(+/- 166)
Bentz et al. 2010 ApJ, 716, 993
43.54
(+/- 0.04)
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.