Episode-wise spectropolarimetry of GRB 220107A: Testing the hypothesis of evolving radiation mechanisms

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Table 4.

Time-resolved spectral fit results of GRB 220107A with Konus-Wind data.

Interval	Time (s)	Model	α	β	E_p (keV)	kT (keV)	Flux (erg cm⁻² s⁻¹)	χ²/d.o.f.
sp1–4	0.0–0.256	CPL	$- 0 . 49_{- 0.36}^{+ 0.45}$ $Mathematical equation: $ -0.49^{+0.45}_{-0.36} $$	–	$245_{- 45}^{+ 62}$ $Mathematical equation: $ 245^{+62}_{-45} $$	–	$(1 . 71_{- 0.27}^{+ 0.30}) \times 10^{- 6}$ $Mathematical equation: $ (1.71^{+0.30}_{-0.27})\times10^{-6} $$	12.1/32
		CPL+BB	$- 0 . 20_{- 0.62}^{+ 0.20}$ $Mathematical equation: $ -0.20^{+0.20}_{-0.62} $$	–	$246_{- 45}^{+ 97}$ $Mathematical equation: $ 246^{+97}_{-45} $$	10.5 (n/c)	$(1 . 62_{- 0.78}^{+ 0.37}) \times 10^{- 6}$ $Mathematical equation: $ (1.62^{+0.37}_{-0.78})\times10^{-6} $$	11.9/30

sp5	0.256–8.448	CPL	−0.74 ± 0.10	–	$291_{- 19}^{+ 22}$ $Mathematical equation: $ 291^{+22}_{-19} $$	–	(1.18 ± 0.06)×10⁻⁶	112.6/98
		CPL+BB	$0 . 09_{- 0.44}^{+ 0.57}$ $Mathematical equation: $ 0.09^{+0.57}_{-0.44} $$	–	$278_{- 16}^{+ 18}$ $Mathematical equation: $ 278^{+18}_{-16} $$	$12 . 7_{- 2.0}^{+ 1.8}$ $Mathematical equation: $ 12.7^{+1.8}_{-2.0} $$	$(9 . 91_{- 0.91}^{+ 0.97}) \times 10^{- 7}$ $Mathematical equation: $ (9.91^{+0.97}_{-0.91})\times10^{-7} $$	107.4/96

sp8	24.8–33.0	CPL	−0.81 ± 0.16	–	$174_{- 16}^{+ 20}$ $Mathematical equation: $ 174^{+20}_{-16} $$	–	(5.8 ± 0.4)×10⁻⁷	85.7/98
		CPL+BB	$- 0 . 29_{- 0.51}^{+ 0.96}$ $Mathematical equation: $ -0.29^{+0.96}_{-0.51} $$	–	$243_{- 36}^{+ 46}$ $Mathematical equation: $ 243^{+46}_{-36} $$	$17 . 6_{- 2.2}^{+ 3.1}$ $Mathematical equation: $ 17.6^{+3.1}_{-2.2} $$	$(4 . 55_{- 0.84}^{+ 0.74}) \times 10^{- 7}$ $Mathematical equation: $ (4.55^{+0.74}_{-0.84})\times10^{-7} $$	78.4/96

sp11	49.4–57.6	CPL	$- 1 . 32_{- 0.29}^{+ 0.38}$ $Mathematical equation: $ -1.32^{+0.38}_{-0.29} $$	–	$428_{- 168}^{+ 559}$ $Mathematical equation: $ 428^{+559}_{-168} $$	–	$(2 . 37_{- 0.57}^{+ 1.01}) \times 10^{- 7}$ $Mathematical equation: $ (2.37^{+1.01}_{-0.57})\times10^{-7} $$	–

sp13	65.8–74.0	CPL	−1.18 ± 0.18	–	$330_{- 70}^{+ 119}$ $Mathematical equation: $ 330^{+119}_{-70} $$	–	$(5 . 3_{- 0.7}^{+ 0.9}) \times 10^{- 7}$ $Mathematical equation: $ (5.3^{+0.9}_{-0.7})\times10^{-7} $$	94.8/98

sp14	74.0–81.4

Band	−0.81 ± 0.10	$- 3 . 06_{- 1.28}^{+ 0.34}$ $Mathematical equation: $ -3.06^{+0.34}_{-1.28} $$	$191_{- 12}^{+ 13}$ $Mathematical equation: $ 191^{+13}_{-12} $$	–	(1.70 ± 0.15)×10⁻⁶	78.2/97

sp15	81.4–89.6	Band	−1.07 ± 0.10	$- 2 . 95_{- 0.79}^{+ 0.26}$ $Mathematical equation: $ -2.95^{+0.26}_{-0.79} $$	$188_{- 14}^{+ 18}$ $Mathematical equation: $ 188^{+18}_{-14} $$	–	(1.38 ± 0.15)×10⁻⁶	90.1/97

sp14–15	74.0–89.6	Band	−0.93 ± 0.07	–	$189_{- 9}^{+ 10}$ $Mathematical equation: $ 189^{+10}_{-9} $$	–	(1.57 ± 0.10)×10⁻⁶	85.9/97

sp16	89.6–97.8	CPL	$- 1 . 40_{- 0.40}^{+ 0.49}$ $Mathematical equation: $ -1.40^{+0.49}_{-0.40} $$	–	$182_{- 58}^{+ 551}$ $Mathematical equation: $ 182^{+551}_{-58} $$	–	$(2 . 01_{- 0.41}^{+ 1.31}) \times 10^{- 7}$ $Mathematical equation: $ (2.01^{+1.31}_{-0.41})\times10^{-7} $$	92.8/98

Notes. Errors are quoted at the 1σ confidence level.

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