! Swift/XRT detailed lightcurve of trigger: 21852, name: GRB 250728A - source 4
 ! T0 for this burst is Swift MET=775387581.049 s, = 2025 Jul 28 at 09:25:45.000 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 upper limits
22120.953	6066.651	-7412.572	7.7798e-03	0.0000e+00	0.0000e+00	3.0375e-04	1.5943e-05	0.2318