J/MNRAS/458/3411 Galactic SNR ^44^Ti survey (Tsygankov+, 2016) ================================================================================ Galactic survey of ^44^Ti 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. =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{deg}) survey in the 67.9 and 78.4keV nuclear de-excitation lines of titanium-44 (^44^Ti) 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^-6^ph/cm2/s (3{sigma}) 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 ^44^Ti emission from any known SNR using existing and prospective X- and gamma-ray telescopes. Among the youngest Galactic SNRs, only Cas A shows significant ^44^Ti 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 5{sigma} confirming previous claims of the rarity of such ^44^Ti-producing SNRs. Description: The INTEGRAL observatory (Winkler et al., 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: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- See also: VII/272 : A catalogue of Galactic supernova remnants (Green, 2014) Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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) -------------------------------------------------------------------------------- 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. -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Patricia Vannier [CDS] 01-Jun-2017