Multi-wavelength observation of MAXI J1348-630 during the recent outburst using ALMA/Chandra/NuSTAR. (arXiv:2104.09926v2 [astro-ph.HE] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Saha_D/0/1/0/all/0/1">Debasish Saha</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pal_S/0/1/0/all/0/1">Sabyasachi Pal</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mandal_M/0/1/0/all/0/1">Manoj Mandal</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Manna_A/0/1/0/all/0/1">Arijit Manna</a>
We studied the multi-wavelength timing and spectral properties of the high
mass X-ray binary MAXI J1348$-$630 during two successive outbursts of April and
June 2019 using ALMA, Swift, Chandra, NuSTAR and NICER. The position of the
source was measured by Chandra (RA=13h48m12.878s, Dec=$-$63$^{circ}$16’28.85″)
with enhanced accuracy. The soft X-ray spectrum (1$-$6 keV) was intensively
studied using Chandra/HETG from which multiple absorption-features
corresponding to Fe XXII, Fe XXIII, Si XII, Cl XVI, S XV, Ar XVIII lines and
the emission features corresponding to Fe XXI, Fe XXIII, Ar XVI lines were
detected. We studied the first broadband spectrum for this black hole that
included fluxes in radio, optical, ultraviolet and X-ray energy bands using
data from ALMA (band 3, 4, 6 and 7; 89.56$-$351.44 GHz) and swift (UVOT and
XRT). The broadband study suggested that the source was accompanied by strong
blackbody radiation from the disk associated with weak synchrotron emission
from the compact jets. The X-ray spectrum was also studied using NuSTAR in the
range of 3$-$78 keV. We studied the evolution of spectral parameters using
NuSTAR observations (from MJD 58655 to MJD 58672) when the source remained in
the canonical hard state during the outburst of June 2019. We detected two
type-C QPOs during the outburst of June 2019 with decreasing centroid
frequencies from 0.82 Hz to 0.67 Hz and decreasing RMS amplitude from 7.6 per
cent to 2.1 per cent. The hardness ratio showed significant variation during
the outburst of April 2019 but remained almost constant during the outburst of
June 2019. The spectral evolution in the hardness intensity diagram was studied
during the outbursts.
We studied the multi-wavelength timing and spectral properties of the high
mass X-ray binary MAXI J1348$-$630 during two successive outbursts of April and
June 2019 using ALMA, Swift, Chandra, NuSTAR and NICER. The position of the
source was measured by Chandra (RA=13h48m12.878s, Dec=$-$63$^{circ}$16’28.85″)
with enhanced accuracy. The soft X-ray spectrum (1$-$6 keV) was intensively
studied using Chandra/HETG from which multiple absorption-features
corresponding to Fe XXII, Fe XXIII, Si XII, Cl XVI, S XV, Ar XVIII lines and
the emission features corresponding to Fe XXI, Fe XXIII, Ar XVI lines were
detected. We studied the first broadband spectrum for this black hole that
included fluxes in radio, optical, ultraviolet and X-ray energy bands using
data from ALMA (band 3, 4, 6 and 7; 89.56$-$351.44 GHz) and swift (UVOT and
XRT). The broadband study suggested that the source was accompanied by strong
blackbody radiation from the disk associated with weak synchrotron emission
from the compact jets. The X-ray spectrum was also studied using NuSTAR in the
range of 3$-$78 keV. We studied the evolution of spectral parameters using
NuSTAR observations (from MJD 58655 to MJD 58672) when the source remained in
the canonical hard state during the outburst of June 2019. We detected two
type-C QPOs during the outburst of June 2019 with decreasing centroid
frequencies from 0.82 Hz to 0.67 Hz and decreasing RMS amplitude from 7.6 per
cent to 2.1 per cent. The hardness ratio showed significant variation during
the outburst of April 2019 but remained almost constant during the outburst of
June 2019. The spectral evolution in the hardness intensity diagram was studied
during the outbursts.
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