J/A+A/586/A71 LMC 0.2-100GeV images (Ackermann+, 2016)
Deep view of the Large Magellanic Cloud with six years of Fermi-LAT
observations.
Ackermann M., Albert A., Atwood W.B., Baldini L., Ballet J.,
Barbiellini G., Bastieri D., Bellazzini R., Bissaldi E., Bloom E.D.,
Bonino R., Brandt T.J., Bregeon J., Bruel P., Buehler R., Caliandro G.A.,
Cameron R.A., Caragiulo M., Caraveo P.A., Cavazzuti E., Cecchi C.,
Charles E., Chekhtman A., Chiang J., Chiaro G., Ciprini S.,
Cohen-Tanugi J., Cutini S., D'Ammando F., de Angelis A., de Palma F.,
Desiante R., Digel S.W., Drell P.S., Favuzzi C., Ferrara E.C., Focke W.B.,
Franckowiak A., Fusco P., Gargano F., Gasparrini D., Giglietto N.,
Giordano F., Godfrey G., Grenier I.A., Grondin M.-H., Guillemot L.,
Guiriec S., Harding A.K., Hill A.B., Horan D., Johannesson G.,
Knodlseder J., Kuss M., Larsson S., Latronico L., Li J., Li L., Longo F.,
Loparco F., Lubrano P., Maldera S., Martin P., Mayer M., Mazziotta M.N.,
Michelson P.F., Mizuno T., Monzani M.E., Morselli A., Murgia S., Nuss E.,
Ohsugi T., Orienti M., Orlando E., Ormes J.F., Paneque D.,
Pesce-Rollins M., Piron F., Pivato G., Porter T.A., Raino S., Rando R.,
Razzano M., Reimer A., Reimer O., Romani R.W., Sanchez-Conde M.,
Schulz A., Sgro E.J.Siskind C., Smith D.A., Spada F., Spandre G.,
Spinelli P., Suson D.J., Takahashi H., Thayer J.B., Tibaldo L.,
Torres D.F., Tosti G., Troja E., Vianello G., Wood M., Zimmer S.
<Astron. Astrophys. 586, A71 (2016)>
=2016A&A...586A..71A 2016A&A...586A..71A (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Gamma rays
Keywords: gamma rays: galaxies - Magellanic Clouds - cosmic rays
Abstract:
The nearby Large Magellanic Cloud (LMC) provides a rare opportunity of
a spatially resolved view of an external star-forming galaxy in
γ-rays. The LMC was detected at 0.1-100GeV as an extended
source with CGRO/EGRET and using early observations with the
Fermi-LAT. The emission was found to correlate with massive
star-forming regions and to be particularly bright towards 30 Doradus.
Studies of the origin and transport of cosmic rays (CRs) in the Milky
Way are frequently hampered by line-of-sight confusion and poor
distance determination. The LMC offers a complementary way to address
these questions by revealing whether and how the γ-ray emission
is connected to specific objects, populations of objects, and
structures in the galaxy.
We revisited the γ-ray emission from the LMC using about 73
months of Fermi-LAT P7REP data in the 0.2-100GeV range. We developed a
complete spatial and spectral model of the LMC emission, for which we
tested several approaches: a simple geometrical description,
template-fitting, and a physically driven model for CR-induced
interstellar emission.
Description:
The analysis was performed using 73.3 months of observations with the
Fermi LAT (mission elapsed time 239587200 to 432694964), primarily
taken in all-sky survey mode. The data set was produced with the
so-called Pass 7 reprocessed (P7REP) version of the event analysis and
selection criteria, which takes into account effects measured in
flight that were not considered in pre-launch performance estimates,
such as pile-up and accidental coincidence effects in the detector
sub-systems, and updated calibration constants, to include effects
such as the degradation in the calorimeter light yield.
Objects:
-----------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------
05 23 34.6 -69 45 22 LMC = NAME LMC
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 156 2 List of fits images
fits/* . 2 Individual images
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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- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 22 I3 --- Nx Number of pixels along X-axis
24- 26 I3 --- Ny Number of pixels along Y-axis
28- 30 I3 Kibyte size Size of FITS file
32- 97 A66 --- FileName Name of FITS file, in subdirectory fits
99-156 A58 --- Title Title of the file
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Acknowledgements:
Pierrick Martin, pierrick.martin(at)irap.omp.eu
(End) Patricia Vannier [CDS] 11-Jan-2016