J/A+A/697/A172 B2 1811+31 multiwavelength lightcurves and SEDs (Abe+, 2025)
Very-high-energy gamma-ray detection and long-term multi-wavelength view of the
flaring blazar B2 1811+31.
Abe K., Abe S., Abhir J., Abhishek A., Acciari V.A., Aguasca-Cabot A.,
Agudo I., Aniello T., Ansoldi S., Antonelli L.A., Arbet Engels A.,
Arcaro C., Asano K., Babi'c A., Barres de Almeida U., Barrio J.A.,
Barrios-Jimenez L., Batkovic I., Baxter J., Becerra Gonzalez J.,
Bednarek W., Bernardini E., Bernete J., Berti A., Besenrieder J.,
Bigongiari C., Biland A., Blanch O., Bonnoli G., Bosnjak Z., Bronzini E.,
Burelli I., Campoy-Ordaz A., Carosi A., Carosi R., Carretero-Castrillo M.,
Castro-Tirado A.J., Cerasole D., Ceribella G., Chilingarian A.,
Cifuentes A., Colombo E., Contreras J.L., Cortina J., Covino S.,
D'Ammando F., D'Amico G., Da Vela P., Dazzi F., De Angelis A., De Lotto B.,
de Menezes R., Delfino M., Delgado J., Delgado Mendez C., Di Pierro F.,
Di Tria R., Di Venere L., Dinesh A., Dominis Prester D., Donini A.,
Dorner D., Doro M., Eisenberger L., Elsaesser D., Escudero J., Farina L.,
Foffano L., Font L., Froese S., Fukazawa Y., Garcia Lopez R.J.,
Garczarczyk M., Gasparyan S., Gaug M., Giesbrecht Paiva J.G., Giglietto N.,
Giordano F., Gliwny P., Gradetzke T., Grau R., Green D., Green J.G.,
Guenther P., Hadasch D., Hahn A., Hassan T., Heckmann L.,
Herrera Llorente J., Hrupec D., Imazawa R., Israyelyan D., Itokawa T.,
Jimenez Martinez I., Jimenez Quiles J., Jormanainen J., Kankkunen S.,
Kayanoki T., Kerszberg D., Khachatryan M., Kluge G.W., Kobayashi Y.,
Konrad J., Kouch P.M., Kubo H., Kushida J., Lainez M., Lamastra A.,
Lindfors E., Lombardi S., Longo F., Lopez-Coto R., Lopez-Moya M.,
Lopez-Oramas A., Loporchio S., Lorini A., Lulic L., Lyard E., Majumdar P.,
Makariev M., Maneva G., Manganaro M., Mangano S., Mannheim K., Mariotti M.,
Martinez M., Marusevec P., Mas-Aguilar A., Mazin D., Menchiari S.,
Mender S., Miceli D., Miranda J.M., Mirzoyan R., Molero Gonzalez M.,
Molina E., Mondal H.A., Moralejo A., Nakamori T., Nanci C., Neustroev V.,
Nickel L., Nievas Rosillo M., Nigro C., Nikolic L., Nilsson K.,
Nishijima K., Njoh Ekoume T., Noda K., Nozaki S., Okumura A., Paiano S.,
Paneque D., Paoletti R., Paredes J.M., Pavletic L., Peresano M., Persic M.,
Pihet M., Pirola G., Podobnik F., Prada Moroni P.G., Prandini E.,
Principe G., Rhode W., Ribo M., Rico J., Righi C., Sahakyan N., Saito T.,
Saturni F.G., Schmitz K., Schmuckermaier F., Schubert J.L., Sciaccaluga A.,
Silvestri G., Sitarek J., Sliusar V., Sobczynska D., Stamerra A.,
Striskovic J., Strom D., Strzys M., Suda Y., Tajima H., Takahashi M.,
Takeishi R., Temnikov P., Terauchi K., Terzic T., Teshima M., Tutone A.,
Ubach S., vanScherpenberg J., Vazquez Acosta M., Ventura S., Verna G.,
Viale I., Vigliano A., Vigorito C.F., Vitale V., Vovk I., Walter R.,
Wersig F., Will M., Yamamoto T., Bartolini C., Bissaldi E., Garrappa S.,
Ankara E., Bader N., Feige M., Huemmer F., Kaplan F., Lorey C., Reinhart D.,
Schoch K., Steineke R., Marchini A., Fallah Ramazani V., Graham M.J.,
Hovatta T., Kiehlmann S., Readhead A.C.S., Benke P., Eppel F., Haemmeric S.,
Hessdoerfer J., Kadler M., Kirchner D., Gokus A., Paraschos G.F., Roesch F.,
Sinapius J.
<Astron. Astrophys. 697, A172 (2025)>
=2025A&A...697A.172A 2025A&A...697A.172A (SIMBAD/NED BibCode)
ADC_Keywords: BL Lac objects ; Gamma rays ; X-ray sources ; Radio sources ;
Optical ; Energy distributions
Keywords: radiation mechanisms: non-thermal - galaxies: active -
BL Lacertae objects: individual: B2 1811+31 - gamma rays: general -
X-rays: galaxies
Abstract:
Among the blazars whose emission has been detected up to
very-high-energy (VHE; 100GeV<E<100TeV) gamma rays, intermediate
synchrotron-peaked BL Lacs (IBLs) are quite rare. The IBL B2 1811+31
(z=0.117) exhibited intense flaring activity in 2020. Detailed
characterization of the source emissions from radio to gamma-ray
energies was achieved with quasi-simultaneous observations, which led
to the first-time detection of VHE gamma-ray emission from the source
with the MAGIC telescopes. In this work, we present a comprehensive
multi-wavelength (MWL) view of B2 1811+31, with a specific focus on
the 2020 VHE flare, employing data from MAGIC, Fermi-LAT, Swift-XRT,
Swift-UVOT and from several optical and radio ground-based
telescopes. Long-term MWL data were employed to contextualize the
high-state episode within the source emissions over 18 years. We
investigate the variability, cross-correlations and classification of
the source emissions during low and high states. We propose an
interpretative leptonic model for the observed radiative high state.
During the 2020 flaring state, the synchrotron peak frequency shifted
to higher values and reached the limit of the IBL classification.
Variability in timescales of few hours in the high-energy (HE;
100MeV<E<100GeV) gamma-ray band poses an upper limit of
6x1014deltaDcm to the size of the emission region responsible for
the gamma-ray flare, delta_D being the relativistic Doppler factor of
the region. During the 2020 high state, the average spectrum became
harder in the HE γ-ray band compared to the low states. A
similar behaviour has been observed in X rays. Conversely, during
different activity periods, we find harder-when-brighter trends in
X-rays and a hint of softer-when-brighter trends at HE γ rays.
Long-term HE gamma-ray and optical correlation indicates the same
emission regions dominate the radiative output in both ranges, whereas
the long-term evolution at 15GHz shows no correlation with the fluxes
at higher frequencies. We test one-zone and two- zone
synchrotron-self-Compton models for describing the broad-band spectral
energy distribution during the 2020 flaring state and investigate the
self- consistency of the proposed scenario.
Description:
In this work, we present for the first time radio-to-TeV data of the
gamma-ray blazar B2 1811+31, with specific focus on the 2020 gamma-ray
flare. We investigate the multiwavelength variability, correlation
patterns and provide an interpretative scenario for the 2020 high
state. This Readme describes the data files published together with
the paper. The data from the figures 1, 2, 3, 4, 5, 9, 10 & 11 are
made available.
Objects:
------------------------------------------------------------------
RA (2000) DE Designation(s)
------------------------------------------------------------------
18 13 35.20 +31 44 17.6 B2 1811+31 = WISEA J181335.20+314417.6
------------------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
f1lfermi.dat 125 175 Light curve of Fig.1, only Fermi-LAT data
f1loptr.dat 93 1172 Light curve of Fig.1, only optical R-band data
f1lrad.dat 68 33 Light curve of Fig.1, only Radio data
f1lxrt.dat 105 66 Light curve of Fig.1, only Swift-XRT data
f2lfermi.dat 105 50 Light curve of Fig.2, only Fermi-LAT data
f2loptr.dat 90 335 Light curve of Fig.2, only optical R-band data
f3lfermi.dat 106 300 Light curve of Fig.3, only Fermi-LAT data
f3lmagic.dat 112 5 Light curve of Fig.3, only MAGIC data
f3loptr.dat 90 118 Light curve of Fig.3, only optical R-band data
f3luvot.dat 118 33 Light curve of Fig.3, only Swift-UVOT data
f3lxrt.dat 102 8 Light curve of Fig.3, only Swift-XRT data
f4sfermi.dat 136 28 Spectral Energy Distribution of Fig.4
f5suvot.dat 125 106 Spectral Energy Distribution of Fig.5,
only Swift-UVOT data
f5sxrt.dat 144 380 Spectral Energy Distribution of Fig.5,
only Swift-XRT data
f9shs.dat 127 17 Spectral Energy Distribution of Fig.9,
only high state data
f9sls.dat 129 18 Spectral Energy Distribution of Fig.9,
only low state data
fig10sed.dat 133 14 Spectral Energy Distribution of Fig.10
fig11sed.dat 127 27 Spectral Energy Distribution of Fig.11
--------------------------------------------------------------------------------
Byte-by-byte Description of file: f1lfermi.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.3 d Time Time of measurement (MJD)
11- 19 F9.6 d e_Time Lower width of time bin
21- 29 F9.6 d E_Time Upper width of time bin
31- 39 F9.6 d Texp Exposure time
41- 54 E14.9 1/s/cm2 Flux Flux measured above the energy threshold
(s-1.cm-2)
56- 69 E14.9 1/s/cm2 e_Flux Lower uncertainty of flux (s-1.cm-2)
71- 84 E14.9 1/s/cm2 E_Flux Upper uncertainty of flux (s-1.cm-2)
86- 88 F3.1 GeV e_Eth Assumed lower energy threshold for integral
flux calculation
90- 95 F6.1 GeV E_Eth Assumed upper energy threshold for integral
flux calculation
97-105 A9 --- Inst Instrument
107-108 A2 --- Format Data Format
110-112 A3 --- TimeUnit Time unit
114-116 A3 --- EnergyUnit Energy unit
118-125 A8 --- FluxUnit Flux unit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: f1loptr.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.3 d Time Time of measurement (MJD)
11- 13 F3.1 d e_Time ?=0 Lower width of time bin
15- 17 F3.1 d E_Time ?=0 Upper width of time bin
19- 21 F3.1 d Texp ?=0 Exposure time
23- 32 F10.8 mJy Flux Flux measured above the energy threshold
34- 45 F12.10 mJy e_Flux Lower uncertainty of flux
47- 58 F12.10 mJy E_Flux Upper uncertainty of flux
60- 64 F5.1 nm b_Eth Assumed lower energy threshold for integral
flux calculation
66- 70 F5.1 nm B_Eth Assumed upper energy threshold for integral
flux calculation
72- 79 A8 --- Inst Instrument
81- 82 A2 --- Format Data Format
84- 86 A3 --- TimeUnit Time unit
88- 89 A2 --- EnergyUnit Energy unit
91- 93 A3 --- FluxUnit Flux unit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: f1lrad.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.3 d Time Time of measurement (MJD)
11- 13 F3.1 d b_Time ?=0 Lower width of time bin
15- 17 F3.1 d B_Time ?=0 Upper width of time bin
19- 21 F3.1 d Texp ?=0 Exposure time
23- 27 F5.1 mJy Flux Flux measured above the energy threshold
29- 31 F3.1 mJy e_Flux Lower uncertainty of flux
33- 35 F3.1 mJy E_Flux Upper uncertainty of flux
37- 40 F4.1 GHz b_Eth Assumed lower energy threshold for integral
flux calculation
42- 45 F4.1 GHz B_Eth Assumed upper energy threshold for integral
flux calculation
47- 53 A7 --- Inst Instrument
55- 56 A2 --- Format Data Format
58- 60 A3 --- TimeUnit Time unit
62- 64 A3 --- EnergyUnit Energy unit
66- 68 A3 --- FluxUnit Flux unit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: f1lxrt.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.1 d Time Time of measurement (MJD)
9- 11 F3.1 d b_Time ?=0 Lower width of time bin
13- 15 F3.1 d B_Time ?=0 Upper width of time bin
17- 19 F3.1 d Texp ?=0 Exposure time
21- 34 E14.9 mW/m2 Flux Flux measured above the energy threshold
(erg/cm2/s)
36- 49 E14.9 mW/m2 e_Flux Lower uncertainty of flux (erg/cm2/s)
51- 64 E14.9 mW/m2 E_Flux Upper uncertainty of flux (erg/cm2/s)
66- 68 F3.1 keV b_Eth Assumed lower energy threshold for integral
flux calculation
70- 73 F4.1 keV B_Eth Assumed upper energy threshold for integral
flux calculation
75- 83 A9 --- Inst Instrument
85- 86 A2 --- Format Data Format
88- 90 A3 --- TimeUnit Time unit
92- 94 A3 --- EnergyUnit Energy unit
96-105 A10 --- FluxUnit Flux unit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: f2lfermi.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.3 d Time Time of measurement (MJD)
11- 13 F3.1 d e_Time Lower width of time bin
15- 17 F3.1 d E_Time Upper width of time bin
19- 21 F3.1 d Texp Exposure time
23- 36 E14.9 1/s/cm2 Flux Flux measured above the energy threshold
(s-1.cm-2)
38- 50 E13.8 1/s/cm2 e_Flux Lower uncertainty of flux (s-1.cm-2)
52- 64 E13.8 1/s/cm2 E_Flux Upper uncertainty of flux (s-1.cm-2)
66- 68 F3.1 GeV b_Eth Assumed lower energy threshold for
integral flux calculation
70- 75 F6.1 GeV B_Eth Assumed upper energy threshold for
integral flux calculation
77- 85 A9 --- Inst Instrument
87- 88 A2 --- Format Data Format
90- 92 A3 --- TimeUnit Time unit
94- 96 A3 --- EnergyUnit Energy unit
98-105 A8 --- FluxUnit Flux unit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: f2loptr.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.3 d Time Time of measurement (MJD)
11- 13 F3.1 d e_Time ?=0 Lower width of time bin
15- 17 F3.1 d E_Time ?=0 Upper width of time bin
19- 21 F3.1 d Texp ?=0 Exposure time
23- 31 F9.7 mJy Flux Flux measured above the energy threshold
33- 43 F11.9 mJy e_Flux Lower uncertainty of flux
45- 55 F11.9 mJy E_Flux Upper uncertainty of flux
57- 61 F5.1 nm b_Eth Assumed lower energy threshold for integral
flux calculation
63- 67 F5.1 nm B_Eth Assumed upper energy threshold for integral
flux calculation
69- 76 A8 --- Inst Instrument
78- 79 A2 --- Format Data Format
81- 83 A3 --- TimeUnit Time unit
85- 86 A2 --- EnergyUnit Energy unit
88- 90 A3 --- FluxUnit Flux unit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: f3lfermi.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.2 d Time Time of measurement (MJD)
10- 12 F3.1 d e_Time Lower width of time bin
14- 16 F3.1 d E_Time Upper width of time bin
18- 20 F3.1 d Texp Exposure time
22- 35 E14.9 1/s/cm2 Flux Flux measured above the energy threshold
(s-1.cm-2)
37- 50 E14.9 1/s/cm2 e_Flux Lower uncertainty of flux (s-1.cm-2)
52- 65 E14.9 1/s/cm2 E_Flux Upper uncertainty of flux (s-1.cm-2)
67- 69 F3.1 GeV b_Eth Assumed lower energy threshold for
integral flux calculation
71- 76 F6.1 GeV B_Eth Assumed upper energy threshold for
integral flux calculation
78- 86 A9 --- Inst Instrument
88- 89 A2 --- Format Data Format
91- 93 A3 --- TimeUnit Time unit
95- 97 A3 --- EnergyUnit Energy unit
99-106 A8 --- FluxUnit Flux unit
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Byte-by-byte Description of file: f3lmagic.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.1 d Time Time of measurement (MJD)
9- 17 F9.7 d e_Time Lower width of time bin
19- 27 F9.7 d E_Time Upper width of time bin
29- 37 F9.7 d Texp Exposure time
39- 49 E11.6 1/s/cm2 Flux Flux measured above the energy threshold
(s-1.cm-2)
51- 61 E11.6 1/s/cm2 e_Flux Lower uncertainty of flux (s-1.cm-2)
63- 73 E11.6 1/s/cm2 E_Flux Upper uncertainty of flux (s-1.cm-2)
75- 79 F5.1 GeV b_Eth Assumed lower energy threshold for
integral flux calculation
81- 86 F6.1 GeV B_Eth Assumed upper energy threshold for
integral flux calculation
88- 92 A5 --- Inst Instrument
94- 95 A2 --- Format Data Format
97- 99 A3 --- TimeUnit Time unit
101-103 A3 --- EnergyUnit Energy unit
105-112 A8 --- FluxUnit Flux unit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: f3loptr.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.3 d Time Time of measurement (MJD)
11- 13 F3.1 d e_Time ?=0 Lower width of time bin
15- 17 F3.1 d E_Time ?=0 Upper width of time bin
19- 21 F3.1 d Texp ?=0 Exposure time
23- 31 F9.7 mJy Flux Flux measured above the energy threshold
33- 43 F11.9 mJy e_Flux Lower uncertainty of flux
45- 55 F11.9 mJy E_Flux Upper uncertainty of flux
57- 61 F5.1 nm b_Eth Assumed lower energy threshold for integral
flux calculation
63- 67 F5.1 nm B_Eth Assumed upper energy threshold for integral
flux calculation
69- 76 A8 --- Inst Instrument
78- 79 A2 --- Format Data Format
81- 83 A3 --- TimeUnit Time unit
85- 86 A2 --- EnergyUnit Energy unit
88- 90 A3 --- FluxUnit Flux unit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: f3luvot.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.3 d Time Time of measurement (MJD)
11- 13 F3.1 d e_Time ?=0 Lower width of time bin
15- 17 F3.1 d E_Time ?=0 Upper width of time bin
19- 21 F3.1 d Texp ?=0 Exposure time
23- 32 F10.8 Jy Flux Flux measured above the energy threshold
34- 44 F11.9 Jy e_Flux Lower uncertainty of flux
46- 56 F11.9 Jy E_Flux Upper uncertainty of flux
58- 75 F18.1 Hz b_Eth Assumed lower energy threshold for integral
flux calculation
77- 94 F18.1 Hz B_Eth Assumed upper energy threshold for integral
flux calculation
96-105 A10 --- Inst Instrument
107-108 A2 --- Format Data Format
110-112 A3 --- TimeUnit Time unit
114-115 A2 --- EnergyUnit Energy unit
117-118 A2 --- FluxUnit Flux unit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: f3lxrt.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.1 d Time Time of measurement (MJD)
9- 11 F3.1 d e_Time ?=0 Lower width of time bin
13- 15 F3.1 d E_Time ?=0 Upper width of time bin
17- 19 F3.1 d Texp ?=0 Exposure time
21- 33 E13.8 mW/m2 Flux Flux measured above the energy threshold
(erg/cm2/s)
35- 47 E13.8 mW/m2 e_Flux Lower uncertainty of flux (erg/cm2/s)
49- 61 E13.8 mW/m2 E_Flux Upper uncertainty of flux (erg/cm2/s)
63- 65 F3.1 keV b_Eth Assumed lower energy threshold for integral
flux calculation
67- 70 F4.1 keV B_Eth Assumed upper energy threshold for integral
flux calculation
72- 80 A9 --- Inst Instrument
82- 83 A2 --- Format Data Format
85- 87 A3 --- TimeUnit Time unit
89- 91 A3 --- EnergyUnit Energy unit
93-102 A10 --- FluxUnit Flux unit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: f4sfermi.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 F12.5 MeV E Energy
14- 26 F13.6 MeV e_E Energy bin width low
28- 39 F12.5 MeV E_E Energy bin width up
41- 53 E13.8 MeV/s/cm2 nufnu Differential photon flux at energy
55- 67 E13.8 MeV/s/cm2 e_nufnu Lower uncertainty in nufnu
69- 81 E13.8 MeV/s/cm2 E_nufnu Upper uncertainty in nufnu
83- 89 F7.1 d Tstart MJD start
91- 97 F7.1 d Tstop MJD stop
99-104 F6.1 d Texp Observation time
106-114 A9 --- Inst Instrument
116-117 A2 --- Format Data Format
119-121 A3 --- TimeUnit Time unit
123-125 A3 --- EnergyUnit Energy unit
127-136 A10 --- SEDUnit SED unit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: f5suvot.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 F18.1 Hz E Energy
20- 22 F3.1 Hz e_E ?=0 Energy bin width low
24- 26 F3.1 Hz E_E ?=0 Energy bin width up
28- 41 E14.9 mW/m2 nufnu Differential photon flux at energy
(erg/cm2/s)
43- 55 E13.8 mW/m2 e_nufnu Lower uncertainty in nufnu (erg/cm2/s)
57- 69 E13.8 mW/m2 E_nufnu Upper uncertainty in nufnu (erg/cm2/s)
71- 79 F9.3 d Tstart MJD start
81- 89 F9.3 d Tstop MJD stop
91- 93 F3.1 d Texp ?=0 Observation time
95-104 A10 --- Inst Instrument
106-107 A2 --- Format Data Format
109-111 A3 --- TimeUnit Time unit
113-114 A2 --- EnergyUnit Energy unit
116-125 A10 --- SEDUnit SED unit
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Byte-by-byte Description of file: f5sxrt.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 E14.9 Hz E Energy
16- 29 E14.9 Hz e_E Energy bin width low
31- 44 E14.9 Hz E_E Energy bin width up
46- 59 E14.9 mW/m2 nufnu Differential photon flux at energy
(erg/cm2/s)
61- 74 E14.9 mW/m2 e_nufnu Lower uncertainty in nufnu (erg/cm2/s)
76- 89 E14.9 mW/m2 E_nufnu Upper uncertainty in nufnu (erg/cm2/s)
91- 99 F9.3 d Tstart MJD start
101-109 F9.3 d Tstop MJD stop
111-113 F3.1 d Texp ?=0 Observation time
115-123 A9 --- Inst Instrument
125-126 A2 --- Format Data Format
128-130 A3 --- TimeUnit Time unit
132-133 A2 --- EnergyUnit Energy unit
135-144 A10 --- SEDUnit SED unit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: f9shs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 E13.8 Hz E Energy
15- 27 E13.8 Hz e_E ?=0 Energy bin width low
29- 41 E13.8 Hz E_E ?=0 Energy bin width up
43- 55 E13.8 mW/m2 nufnu Differential photon flux at energy
(erg/cm2/s)
57- 69 E13.8 mW/m2 e_nufnu Lower uncertainty in nufnu (erg/cm2/s)
71- 83 E13.8 mW/m2 E_nufnu Upper uncertainty in nufnu (erg/cm2/s)
85- 87 F3.1 d Tstart ?=0 MJD start
89- 91 F3.1 d Tstop ?=0 MJD stop
93- 95 F3.1 d Texp ?=0 Observation time
97-106 A10 --- Inst Instrument
108-109 A2 --- Format Data Format
111-113 A3 --- TimeUnit Time unit
115-116 A2 --- EnergyUnit Energy unit
118-127 A10 --- SEDUnit SED unit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: f9sls.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 E13.8 Hz E Energy
15- 28 E14.9 Hz e_E ?=0 Energy bin width low
30- 43 E14.9 Hz E_E ?=0 Energy bin width up
45- 57 E13.8 mW/m2 nufnu Differential photon flux at energy
(erg/cm2/s)
59- 71 E13.8 mW/m2 e_nufnu Lower uncertainty in nufnu (erg/cm2/s)
73- 85 E13.8 mW/m2 E_nufnu Upper uncertainty in nufnu (erg/cm2/s)
87- 89 F3.1 d Tstart ?=0 MJD start
91- 93 F3.1 d Tstop ?=0 MJD stop
95- 97 F3.1 d Texp ?=0 Observation time
99-108 A10 --- Inst Instrument
110-111 A2 --- Format Data Format
113-115 A3 --- TimeUnit Time unit
117-118 A2 --- EnergyUnit Energy unit
120-129 A10 --- SEDUnit SED unit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: fig10sed.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 F12.8 GeV E Energy
14- 25 F12.8 GeV b_E Energy bin width low
27- 37 F11.7 GeV B_e Energy bin width up
39- 51 E13.8 mW/m2 nufnu Differential photon flux at energy
(erg/cm2/s)
53- 65 E13.8 mW/m2 e_nufnu Lower uncertainty in nufnu (erg/cm2/s)
67- 79 E13.8 mW/m2 E_nufnu Upper uncertainty in nufnu (erg/cm2/s)
81- 88 F8.2 d Tstart MJD start
90- 97 F8.2 d Tstop MJD stop
99-101 F3.1 d Texp ?=0 Observation time
103-111 A9 --- Inst Instrument
113-114 A2 --- Format Data Format
116-118 A3 --- TimeUnit Time unit
120-122 A3 --- EnergyUnit Energy unit
124-133 A10 --- SEDUnit SED unit
--------------------------------------------------------------------------------
Byte-by-byte Description of file: fig11sed.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 E13.8 Hz E Energy
15- 27 E13.8 Hz e_E ?=0 Energy bin width low
29- 41 E13.8 Hz E_E ?=0 Energy bin width up
43- 55 E13.8 mW/m2 nufnu Differential photon flux at energy
57- 69 E13.8 mW/m2 e_nufnu Lower uncertainty in nufnu
71- 83 E13.8 mW/m2 E_nufnu Upper uncertainty in nufnu
85- 87 F3.1 d Tstart ?=0 MJD start
89- 91 F3.1 d Tstop ?=0 MJD stop
93- 95 F3.1 d Texp ?=0 Observation time
97-106 A10 --- Inst Instrument
108-109 A2 --- Format Data Format
111-113 A3 --- TimeUnit Time unit
115-116 A2 --- EnergyUnit Energy unit
118-127 A10 --- SEDUnit SED unit
--------------------------------------------------------------------------------
Acknowledgements:
Davide Cerasole, davide.cerasole(at)ba.infn.it
(End) Patricia Vannier [CDS] 31-Mar-2025