A phase-resolved Fermi-LAT analysis of the mode-changing pulsar PSR J2021+4026 shows hints of a multipolar magnetosphere

Open Access

Table 3.

Phase-resolved spectral parameters in different time intervals and in different phase regions.

Parameter	A	B	C	D	E
MJD start	54 683	55 850	57 000	58 150	59 010
MJD stop	55 850	57 000	58 150	59 010	59 493
ISO date start	2008-08-05	2011-10-16	2014-12-09	2018-02-01	2020-06-10
ISO date stop	2011-10-16	2014-12-09	2018-02-01	2020-06-10	2021-10-06
Number of days	1167	1150	1150	860	483
P1 (Δφ = 0.3)
F_γ^(a)	2.65 ± 0.05	1.90 ± 0.04	2.64 ± 0.05	1.88 ± 0.04	2.59 ± 0.06
Γ	2.52 ± 0.02	2.69 ± 0.04	2.58 ± 0.03	2.72 ± 0.05	2.52 ± 0.03
d	0.72 ± 0.03	0.79 ± 0.05	0.76 ± 0.03	0.80 ± 0.05	0.70 ± 0.04
E_p^(b)	860 ± 30	710 ± 30	830 ± 30	680 ± 30	850 ± 40
d_p	0.53 ± 0.03	0.55 ± 0.04	0.56 ± 0.03	0.54 ± 0.04	0.51 ± 0.03
E₁₀^(c)	10.6 ± 0.5	8.4 ± 0.5	9.7 ± 0.4	8.2 ± 0.6	10.8 ± 0.7
BR (Δφ = 0.15)
F_γ^(a)	1.14 ± 0.03	0.76 ± 0.03	1.12 ± 0.03	0.80 ± 0.03	1.06 ± 0.04
Γ	2.49 ± 0.04	2.83 ± 0.07	2.57 ± 0.04	2.76 ± 0.06	2.54 ± 0.05
d	0.71 ± 0.05	0.97 ± 0.09	0.80 ± 0.05	0.83 ± 0.07	0.68 ± 0.07
E_p^(b)	910 ± 40	720 ± 40	870 ± 40	660 ± 40	780 ± 60
d_p	0.54 ± 0.04	0.67 ± 0.06	0.60 ± 0.04	0.56 ± 0.06	0.48 ± 0.05
E₁₀^(c)	11.1 ± 0.8	7.0 ± 0.6	9.6 ± 0.6	7.7 ± 0.7	10.7 ± 1.2
P2 (Δφ = 0.4)
F_γ^(a)	4.05 ± 0.06	3.86 ± 0.06	3.85 ± 0.06	3.98 ± 0.06	3.95 ± 0.07
Γ	2.59 ± 0.02	2.67 ± 0.02	2.57 ± 0.02	2.67 ± 0.02	2.58 ± 0.03
d	0.84 ± 0.03	0.90 ± 0.03	0.82 ± 0.03	0.87 ± 0.03	0.74 ± 0.04
E_p^(b)	900 ± 20	850 ± 20	900 ± 20	820 ± 20	810 ± 30
d_p	0.64 ± 0.02	0.67 ± 0.03	0.62 ± 0.02	0.63 ± 0.02	0.54 ± 0.03
E₁₀^(c)	9.2 ± 0.3	8.2 ± 0.3	9.4 ± 0.3	8.4 ± 0.3	9.8 ± 0.5
OP (Δφ = 0.15)
F_γ^(a)	0.85 ± 0.03	0.59 ± 0.02	0.89 ± 0.14	0.68 ± 0.03	0.89 ± 0.04
Γ	2.77 ± 0.07	2.95 ± 0.08	2.98 ± 0.06	2.76 ± 0.09	2.65 ± 0.08
d	0.85 ± 0.08	0.92 ± 0.09	1.03 ± 0.07	0.8 ± 0.1	0.73 ± 0.09
E_p^(b)	670 ± 40	560 ± 40	630 ± 120	630 ± 50	680 ± 60
d_p	0.57 ± 0.06	0.59 ± 0.07	0.68 ± 0.09	0.54 ± 0.07	0.50 ± 0.07
E₁₀^(c)	7.6 ± 0.7	6.2 ± 0.5	5.9 ± 0.4	8 ± 1	9.2 ± 1.3

Notes. Statistical uncertainties only. Columns related to high-flux states are highlighted with a gray background.

^(a)

γ-ray flux > 100 MeV, 10⁻¹⁰ erg cm⁻² s⁻¹.

^(b)

MeV.

^(c)

GeV.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.