2024ApJ...971L..45C

Query : 2024ApJ...971L..45C

2024ApJ...971L..45C - Astrophys. J., 971, L45 (2024/August-3)

Discovery of Very High Energy Gamma-Ray Emissions from the Low-luminosity AGN NGC 4278 by LHAASO.

CAO Z., AHARONIAN F., AXIKEGU, BAI Y.X., BAO Y.W., BASTIERI D., BI X.J., BI Y.J., BIAN W., BUKEVICH A.V., CAO Q., CAO W.Y., CAO Z., CHANG J., CHANG J.F., CHEN A.M., CHEN E.S., CHEN H.X., CHEN L., CHEN L., CHEN L., CHEN M.J., CHEN M.L., CHEN Q.H., CHEN S., CHEN S.H., CHEN S.Z., CHEN T.L., CHEN Y., CHENG N., CHENG Y.D., CUI M.Y., CUI S.W., CUI X.H., CUI Y.D., DAI B.Z., DAI H.L., DAI Z.G., DANZENGLUOBU, DONG X.Q., DUAN K.K., FAN J.H., FAN Y.Z., FANG J., FANG J.H., FANG K., FENG C.F., FENG H., FENG L., FENG S.H., FENG X.T., FENG Y., FENG Y.L., GABICI S., GAO B., GAO C.D., GAO Q., GAO W., GAO W.K., GE M.M., GENG L.S., GIACINTI G., GONG G.H., GOU Q.B., GU M.H., GUO F.L., GUO X.L., GUO Y.Q., GUO Y.Y., HAN Y.A., HASAN M., HE H.H., HE H.N., HE J.Y., HE Y., HOR Y.K., HOU B.W., HOU C., HOU X., HU H.B., HU Q., HU S.C., HUANG D.H., HUANG T.Q., HUANG W.J., HUANG X.T., HUANG X.Y., HUANG Y., JI X.L., JIA H.Y., JIA K., JIANG K., JIANG X.W., JIANG Z.J., JIN M., KANG M.M., KARPIKOV I., KULESHOV D., KURINOV K., LI B.B., LI C.M., LI C., LI C., LI D., LI F., LI H.B., LI H.C., LI J., LI J., LI K., LI S.D., LI W.L., LI W.L., LI X.R., LI X., LI Y.Z., LI Z., LI Z., LIANG E.W., LIANG Y.F., LIN S.J., LIU B., LIU C., LIU D., LIU D.B., LIU H., LIU H.D., LIU J., LIU J.L., LIU M.Y., LIU R.Y., LIU S.M., LIU W., LIU Y., LIU Y.N., LUO Q., LUO Y., LV H.K., MA B.Q., MA L.L., MA X.H., MAO J.R., MIN Z., MITTHUMSIRI W., MU H.J., NAN Y.C., NERONOV A., OU L.J., PATTARAKIJWANICH P., PEI Z.Y., QI J.C., QI M.Y., QIAO B.Q., QIN J.J., RAZA A., RUFFOLO D., SAIZ A., SAEED M., SEMIKOZ D., SHAO L., SHCHEGOLEV O., SHENG X.D., SHU F.W., SONG H.C., STENKIN Y.V., STEPANOV V., SU Y., SUN D.X., SUN Q.N., SUN X.N., SUN Z.B., TAKATA J., TAM P.H.T., TANG Q.W., TANG R., TANG Z.B., TIAN W.W., WANG C., WANG C.B., WANG G.W., WANG H.G., WANG H.H., WANG J.C., WANG K., WANG K., WANG L.P., WANG L.Y., WANG P.H., WANG R., WANG W., WANG X.G., WANG X.Y., WANG Y., WANG Y.D., WANG Y.J., WANG Z.H., WANG Z.X., WANG Z., WANG Z., WEI D.M., WEI J.J., WEI Y.J., WEN T., WU C.Y., WU H.R., WU Q.W., WU S., WU X.F., WU Y.S., XI S.Q., XIA J., XIANG G.M., XIAO D.X., XIAO G., XIN Y.L., XING Y., XIONG D.R., XIONG Z., XU D.L., XU R.F., XU R.X., XU W.L., XUE L., YAN D.H., YAN J.Z., YAN T., YANG C.W., YANG C.Y., YANG F., YANG F.F., YANG L.L., YANG M.J., YANG R.Z., YANG W.X., YAO Y.H., YAO Z.G., YIN L.Q., YIN N., YOU X.H., YOU Z.Y., YU Y.H., YUAN Q., YUE H., ZENG H.D., ZENG T.X., ZENG W., ZHA M., ZHANG B.B., ZHANG F., ZHANG H., ZHANG H.M., ZHANG H.Y., ZHANG J.L., ZHANG L., ZHANG P.F., ZHANG P.P., ZHANG R., ZHANG S.B., ZHANG S.R., ZHANG S.S., ZHANG X., ZHANG X.P., ZHANG Y.F., ZHANG Y., ZHANG Y., ZHAO B., ZHAO J., ZHAO L., ZHAO L.Z., ZHAO S.P., ZHAO X.H., ZHENG F., ZHONG W.J., ZHOU B., ZHOU H., ZHOU J.N., ZHOU M., ZHOU P., ZHOU R., ZHOU X.X., ZHOU X.X., ZHU B.Y., ZHU C.G., ZHU F.R., ZHU H., ZHU K.J., ZOU Y.C., ZUO X. (The LHAASO Collaboration)

Abstract (from CDS):

The first source catalog of the Large High Altitude Air Shower Observatory (LHAASO) reported the detection of a very high energy gamma-ray source, 1LHAASO J1219+2915. This Letter presents a further detailed study of the spectral and temporal behavior of this pointlike source. The best-fit position of the TeV source (R.A. = 185.°05 ± 0.°04, decl. = 29.°25 ± 0.°03) is compatible with NGC 4278 within ∼0.°03. Variation analysis shows an indication of variability on a timescale of a few months in the TeV band, which is consistent with low-frequency observations. Based on these observations, we report the detection of TeV γ-ray emissions from this low-luminosity active galactic nucleus. The observation by LHAASO's Water Cherenkov Detector Array during the active period has a significance level of 8.8σ with a best-fit photon spectral index Γ = 2.56 ± 0.14 and a flux f_1-10 TeV_ = (7.0 ± 1.1sta ± 0.35syst) × 10–13 photons cm–2 s–1, or approximately 5% of the Crab Nebula. The discovery of VHE gamma-ray emission from NGC 4278 indicates that compact, weak radio jets can efficiently accelerate particles and emit TeV photons.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): High energy astrophysics - Gamma-ray astronomy - Low-luminosity active galactic nuclei - LINER galaxies - Blazars - Fanaroff-Riley radio galaxies

Simbad objects: 7

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Number of rows : 7
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 IC 310 AGN 03 16 42.9787569912 +41 19 29.615579544   14.3       ~ 311 2
2 QSO B0625-354 BLL 06 27 06.7286533392 -35 29 15.363665088   14.93       ~ 206 1
3 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
4 NGC 4278 LIN 12 20 06.8242 +29 16 50.722 11.54 11.09 10.16     ~ 988 2
5 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
6 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
7 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3

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