! Swift/XRT detailed lightcurve of trigger: 353728, name: GRB 090531B
 ! T0 for this burst is Swift MET=265487760.96 s, = 2009 May 31 at 18:35:56.172 UT

 ! Data covers 0.3-10 keV
 ! For details of light-curve production, see Evans et al. 2007, A&A, 469, 379
 ! BINMODE: GRB-like (counts)
READ TERR 1 2
READ SERR 3
!Time    	T_+ve   	T_-ve   	Rate    	Ratepos 	Rateneg 	BGrate  	BGerr   	FracExp
! PC data
6112.497	26524.998	-2309.332	6.635833e-03	1.325398e-03	-1.325398e-03	2.643129e-04	1.508513e-05	0.197302
NO	NO	NO	NO	NO
! PC upper limits
76591.334	38945.742	-4042.789	2.6633e-03	0.0000e+00	0.0000e+00	1.0256e-04	5.6286e-06	0.1253