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PG1229+204 Alternate Names: Mrk771   ACS, HRC, F550M RA = 12:32:03.6   Dec = +20:09:29   z = 0.06301 DL =  274.9 Mpc     DA =  243.3 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): 6.083 (+ 4.547/- 2.648)   (107 Msun) 5.734 (+ 2.848/- 2.270)   (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	48986 - 50997	...		10.9 (+19.9/-23.9)	7.0 (+26.0/-16.0)	1540 (+/- 159)	3207 (+/- 875)	Kaspi et al. 2000 ApJ, 533, 631 Peterson et al. 2004 ApJ, 613, 682	...
Hβ λ4861	48319 - 50997	42.8 (+ 2.3/- 1.1)	Zu et al. 2011 ApJ, 735, 80	37.8 (+27.6/-15.3)	32.0 (+10.0/-19.0)	1385 (+/- 111)	3415 (+/- 320)	Kaspi et al. 2000 ApJ, 533, 631 Peterson et al. 2004 ApJ, 613, 682	43.64 (+/- 0.06)	Bentz et al. 2013 ApJ, 767, 149
Hα λ6563	48319 - 50997	45.7 (+ 2.8/- 1.1)	Zu et al. 2011 ApJ, 735, 80	89.0 (+34.1/-43.4)	48.0 (+40.0/- 7.0)	1737 (+/- 118)	3229 (+/- 364)	Kaspi et al. 2000 ApJ, 533, 631 Peterson et al. 2004 ApJ, 613, 682	43.64 (+/- 0.06)	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.