2000A&A...353..847A


Query : 2000A&A...353..847A

2000A&A...353..847A - Astronomy and Astrophysics, volume 353, 847-852 (2000/1-3)

HEGRA search for TeV emission from BL Lacertae objects.

AHARONIAN F.A., AKHPERJANIAN A.G., BARRIO J.A., BERNLOEHR K., BOJAHR H., CALLE I., CONTRERAS J.L., CORTINA J., DAUM A., DECKERS T., DENNINGHOFF S., FONSECA V., GONZALEZ J.C., HEINZELMANN G., HEMBERGER M., HERMANN G., HESS M., HEUSLER A., HOFMANN W., HOHL H., HORNS D., IBARRA A., KANKANYAN R., KESTEL M., KETTLER J., KOEHLER C., KONOPELKO A., KORNMAYER H., KRANICH D., KRAWCZYNSKI H., LAMPEITL H., LINDNER A., LORENZ E., MAGNUSSEN N., MANG O., MEYER H., MIRZOYAN R., MORALEJO A., PADILLA L., PANTER M., PETRY D., PLAGA R., PLYASHESHNIKOV A., PRAHL J., PUEHLHOFER G., RAUTERBERG G., RENAULT C., RHODE W., ROEHRING A., SAHAKIAN V., SAMORSKI M., SCHMELE D., SCHILLING M., SCHROEDER F., STAMM W., VOELK H.J., WIEBEL-SOOTH B., WIEDNER C., WILLMER M. and WITTEK W.

Abstract (from CDS):

The HEGRA system of four Imaging Atmospheric Cherenkov Telescopes (IACTs) has been used to extensively observe extragalactic objects. In this paper we describe the search for TeV emission from nine very promising potential TeV sources, namely eight ``high frequency'' BL Lac objects (HBLs), and the object ``BL Lacertae'' itself. These objects were observed during 1997 and 1998 seasons, with total integration times ranging between one and fifteen hours. No evidence for emission was found from any of these objects and the upper limits on the integral energy flux above ∼750 GeV are on the level of a few times 10–12erg/cm2/s. For the two objects BL Lacertae and 1ES 2344+51.4, we discuss the astrophysical implications of the TeV flux upper limit, using also information from the X-ray and γ-ray bands as measured with the All Sky Monitor (ASM) of RXTE (1.3-12.0keV) and with EGRET (30MeV-20GeV).

Abstract Copyright:

Journal keyword(s): galaxies: BL Lacertae objects: general - galaxies: BL Lacertae objects: individual: 1ES 2344+51.4 - galaxies: BL Lacertae objects: individual: BL Lac - gamma rays: observations

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 QSO B0145+138 BLL 01 48 29.7013033536 +14 02 17.848330656     17.90 16.7   ~ 45 0
2 3C 66A BLL 02 22 39.6114771888 +43 02 07.799534304   15.71 15.21 14.5   ~ 834 1
3 QSO B0229+200 BLL 02 32 48.6148874688 +20 17 17.486717388   18.0 18.00     ~ 283 3
4 QSO B0317+18 BLL 03 19 51.8082475320 +18 45 34.562475432     18.12     ~ 195 0
5 QSO B0414+009 BLL 04 16 52.4945693352 +01 05 23.899102620   16.86 16.38 16   ~ 258 0
6 QSO B0647+250 BLL 06 50 46.4900658984 +25 02 59.625654828 16.17 15.97 15.79 16.3   ~ 130 2
7 QSO B0829+047 BLL 08 31 48.8770033992 +04 29 39.086842884   17.10 16.4 14.55   ~ 439 2
8 Mrk 421 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2512 1
9 4C 39.49 BLL 16 53 52.2160772976 +39 45 36.613228860 14.09 14.15 13.29 8.26   ~ 2017 2
10 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2125 1
11 QSO B2344+514 BLL 23 47 04.8372110928 +51 42 17.877513168     15.50 10.7   ~ 410 0

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2022.05.24-14:21:55

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