SDSS J120136.02+300305.5 was detected in an XMM-Newton slew from June 2010
with a flux 56 times higher than an upper limit from ROSAT, corresponding to
Lx~3x10^44 ergs/s. It has the optical spectrum of a quiescent galaxy (z=0.146).
Overall the X-ray flux has evolved consistently with the canonical t^-5/3
model, expected for returning stellar debris from a tidal disruption event,
fading by a factor ~300 over 300 days. In detail the source is very variable
and became invisible to Swift between 27 and 48 days after discovery, perhaps
due to self-absorption. The X-ray spectrum is soft but is not the expected tail
of optically thick thermal emission. It may be fit with a Bremsstrahlung or
double-power-law model and is seen to soften with time and declining flux.
Optical spectra taken 12 days and 11 months after discovery indicate a deficit
of material in the broad line and coronal line regions of this galaxy, while a
deep radio non-detection implies that a jet was not launched during this event.
Description
A tidal disruption-like X-ray flare from the quiescent galaxy SDSS
J120136.02+300305.5
%0 Generic
%1 Saxton2012
%A Saxton, R. D.
%A Read, A. M.
%A Esquej, P.
%A Komossa, S.
%A Dougherty, S.
%A Rodriguez-Pascual, P.
%A Barrado, D.
%D 2012
%K blackhole tidaldisruption
%T A tidal disruption-like X-ray flare from the quiescent galaxy SDSS
J120136.02+300305.5
%U http://arxiv.org/abs/1202.5900
%X SDSS J120136.02+300305.5 was detected in an XMM-Newton slew from June 2010
with a flux 56 times higher than an upper limit from ROSAT, corresponding to
Lx~3x10^44 ergs/s. It has the optical spectrum of a quiescent galaxy (z=0.146).
Overall the X-ray flux has evolved consistently with the canonical t^-5/3
model, expected for returning stellar debris from a tidal disruption event,
fading by a factor ~300 over 300 days. In detail the source is very variable
and became invisible to Swift between 27 and 48 days after discovery, perhaps
due to self-absorption. The X-ray spectrum is soft but is not the expected tail
of optically thick thermal emission. It may be fit with a Bremsstrahlung or
double-power-law model and is seen to soften with time and declining flux.
Optical spectra taken 12 days and 11 months after discovery indicate a deficit
of material in the broad line and coronal line regions of this galaxy, while a
deep radio non-detection implies that a jet was not launched during this event.
@misc{Saxton2012,
abstract = { SDSS J120136.02+300305.5 was detected in an XMM-Newton slew from June 2010
with a flux 56 times higher than an upper limit from ROSAT, corresponding to
Lx~3x10^44 ergs/s. It has the optical spectrum of a quiescent galaxy (z=0.146).
Overall the X-ray flux has evolved consistently with the canonical t^-5/3
model, expected for returning stellar debris from a tidal disruption event,
fading by a factor ~300 over 300 days. In detail the source is very variable
and became invisible to Swift between 27 and 48 days after discovery, perhaps
due to self-absorption. The X-ray spectrum is soft but is not the expected tail
of optically thick thermal emission. It may be fit with a Bremsstrahlung or
double-power-law model and is seen to soften with time and declining flux.
Optical spectra taken 12 days and 11 months after discovery indicate a deficit
of material in the broad line and coronal line regions of this galaxy, while a
deep radio non-detection implies that a jet was not launched during this event.
},
added-at = {2012-03-01T10:42:48.000+0100},
author = {Saxton, R. D. and Read, A. M. and Esquej, P. and Komossa, S. and Dougherty, S. and Rodriguez-Pascual, P. and Barrado, D.},
biburl = {https://www.bibsonomy.org/bibtex/2d64fcf775c244e0957617883d0b66b87/yfyuan},
description = {A tidal disruption-like X-ray flare from the quiescent galaxy SDSS
J120136.02+300305.5},
interhash = {b88be8bd177fc730f85807d36ed528a2},
intrahash = {d64fcf775c244e0957617883d0b66b87},
keywords = {blackhole tidaldisruption},
note = {cite arxiv:1202.5900Comment: Accepted for publication in Astronomy and Astrophysics. 11 pages, 11 figures},
timestamp = {2012-03-01T10:42:48.000+0100},
title = {A tidal disruption-like X-ray flare from the quiescent galaxy SDSS
J120136.02+300305.5},
url = {http://arxiv.org/abs/1202.5900},
year = 2012
}