2022RNAAS...6..274A

Query : 2022RNAAS...6..274A

2022RNAAS...6..274A - Research Notes of the AAS, 6, 274 (2022/December-0)

A Multiwavelength Study of the Ongoing Changing-look AGN AT2021fxu.

AJAY Y., GUOLO M. and PASHAM D.

Abstract (from CDS):

We present multiwavelength analyses of an active optical transient AT2021fxu which shows the appearance of previously absent broad emission lines in a recent optical spectrum, suggesting a Changing-look Active Galactic Nucleus (AGN). During the spectral transition, the brightness in the individual photometric bands increased up to ≈0.6 in the optical bands and up to ≈1.1 mag in the UV bands. The brightening was accompanied by a blueward shift of the optical spectrum. AT2021fxu shows high X-ray (0.3-10 keV) flux variability before and after the outburst, with the average X-ray flux increasing by a factor of ≈2 post-outburst. However, the X-ray spectral shape remains roughly the same, with no significant change in the line-of-sight column density. AT2021fxu's overall properties are consistent with an accretion-rate-driven transition from a Type-II to a Type-1 AGN.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Active galactic nuclei - Optical bursts - Transient sources

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 AT 2021fxu AGN 13 47 18.74640 +02 10 57.9830           ~ 13 0

Query : 2022RNAAS...6..274A

Basic data :
AT 2021fxu -- Active Galaxy Nucleus
Other object types: otypes_help 		ev (AT,ZTF,...), X (2MAXI,SWIFT), AGN (2022ATel15825), G (2MASX)
ICRS coord. (ep=J2000) : 		13 47 18.74640 +02 10 57.9830 (Near-IR) [ ] C 2006AJ....131.1163S
FK4 coord. (ep=B1950 eq=1950) : 		13 44 46.18310 +02 25 54.8189 [ ]
Gal coord. (ep=J2000) : 		333.50683359 +61.69185121 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 204299 [~] / z(spectroscopic) 1.29757 [~] / cz 389001.7 [~]
   (Opt) D 2017ApJ...850...74K
Angular size (arcmin): 		0.203 0.118 0 (NIR) C 2006AJ....131.1163S
Fluxes (3) :
J 14.726 [0.112] C 2006AJ....131.1163S
H 13.894 [0.116] C 2006AJ....131.1163S
K 13.425 [0.150] C 2006AJ....131.1163S
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Identifiers (6) :
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AT 2021fxu 2MAXI J1348+024 ZTF21aalxxzn
2MASX J13471874+0210579 SWIFT J1347.7+0212 Gaia 22dgm

References (13 between 1850 and 2026) (Total 13)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 2   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : AT 2021fxu

Link by name to the catalogue in VizieR :

2MASX J13471874+0210579

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