J/A+A/581/A126 Application of the D3PO algorithm (Selig+, 2015)
The denoised, deconvolved, and decomposed Fermi gamma-ray sky.
An application of the D3PO algorithm.
Selig M., Vacca V., Oppermann N., Ensslin T.A.
<Astron. Astrophys. 581, A126 (2015)>
=2015A&A...581A.126S 2015A&A...581A.126S (SIMBAD/NED BibCode)
ADC_Keywords: Gamma rays ; Interstellar medium ; Supernova remnants ; Pulsars ;
Active gal. nuclei ; Clusters, galaxy
Keywords: methods: data analysis - methods: statistical -
techniques: image processing - gamma-rays: general -
catalogs gamma-rays: diffuse background
Description:
We analyze the 6.5yr all-sky data from the Fermi LAT restricted to
gamma-ray photons with energies between 0.6-307.2GeV. We present a
non-parametric reconstruction of the diffuse photon flux up to several
hundred GeV, its all-sky spectral index map, and its angular power
spectrum. We decompose the diffuse emission into a cloud-like abd a
bubble-like component and analyze their spectra. Additionally, we
wrote up a catalog of source candidates that includes 3106 sources.
For each source we report the location in the sky, flux, spectral
index, and possible associations with sources from the second and
third Fermi source catalog.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 459 3106 1DF catalog of source candidates (table 3)
list.dat 111 4 List of fits file
fits/* . 4 Individual fits files
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See also:
J/ApJS/199/31 : Fermi LAT second source catalog (2FGL) (Nolan+, 2012)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Candidate name (1DFNNNNNN)
11- 20 F10.6 deg GLON Galactic longitude
22- 31 F10.6 deg GLAT Galactic latitude
33- 44 E12.6 ph/cm1/s Flux Total flux between 1-100GeV
46 A1 --- Emid1 [F/T] Contributing energy band 1 (1)
48 A1 --- Emid2 [F/T] Contributing energy band 2 (1)
50 A1 --- Emid3 [F/T] Contributing energy band 3 (1)
52 A1 --- Emid4 [F/T] Contributing energy band 4 (1)
54 A1 --- Emid5 [F/T] Contributing energy band 5 (1)
56 A1 --- Emid6 [F/T] Contributing energy band 6 (1)
58 A1 --- Emid7 [F/T] Contributing energy band 7 (1)
60 A1 --- Emid8 [F/T] Contributing energy band 8 (1)
62 A1 --- Emid9 [F/T] Contributing energy band 9 (1)
64- 68 F5.3 deg Dist1 ? Distance to associated sources Assoc1
70- 87 A18 --- Assoc1a Associated 2FGL source at Dist1
89-106 A18 --- Assoc1b Other name of associated 2FGL source at Dist1
108-125 A18 --- Assoc1c Other name of associated 2FGL source at Dist1
127-131 F5.3 deg Dist2 ? Distance to associated sources Assoc2
133-150 A18 --- Assoc2a Associated 3FGL source at Dist2
152-169 A18 --- Assoc2b Other name of associated 3FGL source at Dist2
171-188 A18 --- Assoc2c Other name of associated 3FGL source at Dist2
190-194 F5.3 deg Dist3 ? Distance to associated sources Assoc3
196-213 A18 --- Assoc3a Associated 2FGL source at Dist3
215-232 A18 --- Assoc3b Other name of associated 2FGL source at Dist3
234-251 A18 --- Assoc3c Other name of associated 2FGL source at Dist3
253-257 F5.3 deg Dist4 ? Distance to associated sources Assoc4
259-276 A18 --- Assoc4a Associated 2FGL source at Dist4
278-286 F9.6 --- chi2PL ? Plain power-law chi2 value (2)
288-296 F9.6 --- chi2LP ? log-parabola chi2 value (2)
298-306 F9.6 --- chi2EXP ? Power law with exponential cutoff chi2
value (2)
308-315 F8.3 --- gammaPL ? Plain power-law gamma parameter (2)
317-324 F8.6 --- e_gammaPL ? rms uncertainty on gammaPL
326-333 F8.6 --- gammaLP ? log-parabola gamma parameter (2)
335-342 F8.6 --- e_gammaLP ? rms uncertainty on gammaLP
344-351 F8.6 --- gammaEXP ? Power law with exponential cutoff
gamma parameter (2)
353-360 F8.6 --- e_gammaEXP ? rms uncertainty on gamma_EXP
362-370 F9.5 --- KPL ? Plain power-law K parameter (2)
372-379 F8.6 --- e_KPL ? rms uncertainty on KPL
381-389 F9.5 --- KLP ? log-parabola K parameter (2)
391-398 F8.6 --- e_KLP ? rms uncertainty on KLP
400-408 F9.5 --- KEXP ? Power law with exponential cutoff
K parameter (2)
410-417 F8.6 --- e_KEXP ? rms uncertainty on KEXP
419-427 F9.6 --- betaLP ? log-parabola beta parameter (2)
429-436 F8.6 --- e_betaLP ? rms uncertainty on betaLP
438-446 F9.6 --- EcutEXP ? Power law with exponential cutoff
Ecut value (2)
448-459 E12.6 --- e_EcutEXP ? rms uncertainty on EcutEXP
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Note (1): T for True, F for False.
Table 1: Overview of the energy binning. Listed are lowest,
logarithmic mean, and highest energy for each bin.
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band Emin [GeV] Emid [GeV] Emax [GeV]
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1 0.60 0.85 1.20
2 1.20 1.70 2.40
3 2.40 3.40 4.80
4 4.80 6.79 9.60
5 9.60 13.58 19.20
6 19.20 27.15 38.40
7 38.40 54.31 76.80
8 76.80 108.61 153.60
9 153.60 217.22 307.20
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Note (2): The spectral index of a source should not (or at least not strongly)
be influenced by these differences. For each source, we attempted to fit
three different spectral shapes:
a plain power-law (PL),
{PHI}(u)(E)=K*(E/E0)exp(-gamma(u)),
a log-parabola (LP),
{PHI}(u)(E)=K*(E/E0)exp(-gamma(u)-beta*log(E/E0)),
and a power law with exponential cutoff (EXP),
{PHI}(u)(E)=K*[(E/E0)exp(-gamma(u))]exp(-(E-E0)/Ecut)
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- FileName Name of the fits file in subdirectory fits
18- 22 I5 Kibyte size Size of the fits file
24-111 A88 --- Title Title of the file
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Acknowledgements:
Valentina Vacca, vvacca(at)MPA-Garching.MPG.DE
(End) Valentina Vacca [MPA, Germany], Patricia Vannier [CDS] 23-Jul-2015