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ATEL #16334							ATEL #16334\
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Title:	LEIA detected the X-ray flare from the nova ASASSN-23hd\
Author:	X. P. Xu (NAOC, CAS), H. N. Yang (NAOC, CAS), M. J. Liu (NAOC,\
		CAS), X. Pan (NAOC, CAS), Y. Liu (NAOC, CAS), Z. X. Ling (NAOC, CAS),\
		C. Zhang (NAOC, CAS), W. Chen (NAOC, CAS), H. Q. Cheng (NAOC, CAS),\
		C. Z. Cui (NAOC, CAS), D. W. Fan (NAOC, CAS), H. B. Hu (NAOC, CAS),\
		J. W. Hu (NAOC, CAS), M. H. Huang (NAOC, CAS), C. C. Jin (NAOC, CAS),\
		D. M. Li (BNU), D. Y. Li (NAOC, CAS), Q. X. Li (BNU), T. Y. Lian (NAOC,\
		CAS), H. Y. Liu (NAOC, CAS), Z. Z. Lv (NAOC, CAS), X. Mao (NAOC, CAS),\
		H. W. Pan (NAOC, CAS), H. Sun (NAOC, CAS), C. Y. Wang (THU), W. X.\
		Wang (NAOC, CAS), Y. L. Wang (NAOC, CAS), Q. Y. Wu (NAOC, CAS), Y.\
		F. Xu (NAOC, CAS), M. Zhang (NAOC, CAS), W. D. Zhang (NAOC, CAS),\
		W. J. Zhang (NAOC, CAS), Y. J. Zhang (THU), D. H. Zhao (NAOC, CAS)\
		and W. Yuan (NAOC, CAS), on behalf of the LEIA and Einstein Probe\
		team\
Queries:	ep_ta@bao.ac.cn\
Posted:	14 Nov 2023; 09:24 UT\
Subjects:X-ray, Nova, Transient\
\
We report on LEIA detections of the X-ray flare from the transient ASASSN-23hd\
in the LMC, which was initially discovered by ASAS-SN on 2023-10-13, and\
then was classified as a classical nova by SOAR spectroscopic follow-up\
on 2023-10-15 (ATel #16294). \
\
LEIA firstly detected this source at 2023-11-07T01:28:08 with a 0.5-4 keV\
flux of ~4.3e-11 erg/s/cm^2, and continuous brightening were detected until\
2023-11-12T18:16:08 with a peak 0.5-4 keV flux of ~8.4e-11 erg/s/cm^2.\
ASASSN-23hd had formerly been monitored by Swift/XRT from 2023-10-18 till\
2023-11-1, of which the last observation gave a 0.5-4 keV flux of ~4.8e-13erg/s/cm^2.\
New XRT observations of this source had been carried out since 2023-11-11.\
We looked into the recent observation at 2023-11-11T17:45:57 (obs ID: 00016292009,\
650s exposure time in Windowed Timing mode), and used an absorbed apec\
plus blackbody (the column density is fixed to 1.1e21 cm^-2) to fit the\
0.3-10 keV spectrum, the fitted model gave an absorbed flux of ~8.6e-11\
erg/s/cm^2 in the 0.5-4 keV band, which is consistent with the flux given\
by LEIA. \
\
The continuous brightening in X-ray indicates that the outburst of this\
nova is still in progress and more follow-up observations are encouraged.\
\
LEIA (Zhang et al, ApJL, 941, 2) is a soft X-ray Lobster-eye imager (0.5\
- 4.0 keV) with a FoV of 340 square degrees aboard the SATech-01 satellite\
of CAS, launched on July 27, 2022.\
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Password Certification: Yuan Liu (liuyuan@bao.ac.cn)\
https://www.astronomerstelegram.org/?read=16334\
}