J/MNRAS/458/3411 Galactic SNR 44Ti survey (Tsygankov+, 2016)
Galactic survey of 44Ti sources with the IBIS telescope onboard INTEGRAL.
Tsygankov S.S., Krivonos R.A., Lutovinov A.A., Revnivtsev M.G.,
Churazov E.M., Sunyaev R.A., Grebenev S.A.
<Mon. Not. R. Astron. Soc., 458, 3411-3419 (2016)>
=2016MNRAS.458.3411T 2016MNRAS.458.3411T (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Gamma rays ; Supernovae
Keywords: nuclear reactions, nucleosynthesis, abundances -
ISM: supernova remnants - gamma-rays: ISM
Abstract:
We report the results of the deepest Galactic plane (|b|<17.5°)
survey in the 67.9 and 78.4keV nuclear de-excitation lines of
titanium-44 (44Ti) performed using the data acquired with the
IBIS/ISGRI instrument onboard the INTEGRAL satellite during 12yr of
operation. The peak sensitivity of our survey reached an unprecedented
level of 4.8x10-6ph/cm2/s (3σ) that improves the sensitivity
of the survey done by Compton Gamma-Ray Observatory/COMPTEL by a
factor of ∼5. As a result, constraining upper limits for all sources
from the catalogue of Galactic supernova remnants (SNRs; Green, 2014,
Cat. VII/272) are derived. These upper limits can be used to estimate
the exposure needed to detect 44Ti emission from any known SNR using
existing and prospective X- and gamma-ray telescopes. Among the
youngest Galactic SNRs, only Cas A shows significant 44Ti emission
flux in good agreement with the NuSTAR measurements. We did not detect
any other sources of titanium emission in the Galactic plane at
significance level higher than 5σ confirming previous claims of
the rarity of such 44Ti-producing SNRs.
Description:
The INTEGRAL observatory (Winkler et al., 2003A&A...411L...1W 2003A&A...411L...1W) has
demonstrated a great success in surveying the sky in hard X-rays at
energies above 20keV.
For the current analysis, we utilized all the publicly available data
taken until 2014 October (or spacecraft revolution 1469).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 132 294 The complete catalogue of Galactic SNRs (Green,
2014, VII/272) with measured fluxes or 3 sigma
upper limits in the 64.6-82.2keV band
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See also:
VII/272 : A catalogue of Galactic supernova remnants (Green, 2014)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequential number (1)
5- 7 A3 --- --- [SNR]
9- 19 A11 --- SNR SNR name (GLLL.l+BB.b)
21- 28 F8.3 deg GLON [] Galactic longitude
30- 36 F7.3 deg GLAT Galactic latitude
38 A1 --- l_Flux 3 sigma limit flag on Flux (2)
39- 43 F5.2 10-15W/m2 Flux ? Flux in 64.6-82.2keV band
45- 48 F4.2 10-15W/m2 e_Flux ? rms uncertainty on Flux
50- 54 F5.2 10-15W/m2 Signi ? Significance for detected sources
56-132 A77 --- Notes Notes (3)
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Note (1): Catalogue is sorted by source name, which is in turn, based on
Galactic coordinates.
Note (2): If significance of the detection of such source is above 3 sigma
level, an upper limit (3 sigma) in the 78.4keV line is shown assuming a
simple power-law continuum model.
Note (3): The spatial confusion with a known hard X-ray source (shown in
parenthesis) is indicated. SNRs dominated by the continuum flux are marked
as well.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 01-Jun-2017