2009ApJ...695..596H

Query : 2009ApJ...695..596H

2009ApJ...695..596H - Astrophys. J., 695, 596-618 (2009/April-2)

Multiwavelength observations of Markarian 421 in 2005-2006.

HORAN D., ACCIARI V.A., BRADBURY S.M., BUCKLEY J.H., BUGAEV V., BYRUM K.L., CANNON A., CELIK O., CESARINI A., CHOW Y.C.K., CIUPIK L., COGAN P., FALCONE A.D., FEGAN S.J., FINLEY J.P., FORTIN P., FORTSON L.F., GALL D., GILLANDERS G.H., GRUBE J., GYUK G., HANNA D., HAYS E., KERTZMAN M., KILDEA J., KONOPELKO A., KRAWCZYNSKI H., KRENNRICH F., LANG M.J., LEE K., MORIARTY P., NAGAI T., NIEMIEC J., ONG R.A., PERKINS J.S., POHL M., QUINN J., REYNOLDS P.T., ROSE H.J., SEMBROSKI G.H., SMITH A.W., STEELE D., SWORDY S.P., TONER J.A., VASSILIEV V.V., WAKELY S.P., WEEKES T.C., WHITE R.J., WILLIAMS D.A., WOOD M.D., ZITZER B., ALLER H.D., ALLER M.F., BAKER M., BARNABY D., CARINI M.T., CHARLOT P., DUMM J.P., FIELDS N.E., HOVATTA T., JORDAN B., KOVALEV Y.A., KOVALEV Y.Y., KRIMM H.A., KURTANIDZE O.M., LAHTEENMAKI A., LE CAMPION J.F., MAUNE J., MONTARULI T., SADUN A.C., SMITH S., TORNIKOSKI M., TURUNEN M. and WALTERS R.

Abstract (from CDS):

Since 2005 September, the Whipple 10 m Gamma-ray Telescope has been operated primarily as a blazar monitor. The five northern hemisphere blazars that have already been detected at the Whipple Observatory, Markarian 421 (Mrk 421), H1426+428, Mrk 501, 1ES 1959+650, and 1ES 2344+514, are monitored routinely each night that they are visible. We report on the Mrk 421 observations taken from 2005 November to 2006 June in the gamma-ray, X-ray, optical, and radio bands. During this time, Mrk 421 was found to be variable at all wavelengths probed. Both the variability and the correlations among different energy regimes are studied in detail here. A tentative correlation, with large spread, was measured between the X-ray and gamma-ray bands, while no clear correlation was evident among the other energy bands. In addition to this, the well-sampled spectral energy distribution of Mrk 421 (1101+384) is presented for three different activity levels. The observations of the other blazar targets will be reported separately.

Abstract Copyright: ∼

Journal keyword(s): BL Lacertae objects: individual: Markarian 421 - gamma rays: observations - X-rays: individual: Markarian 421

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4017 3
2 M 1 SNR 05 34 30.9 +22 00 53           ~ 6205 1
3 Mrk 421 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2683 1
4 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7226 3
5 QSO B1426+428 BLL 14 28 32.6090008440 +42 40 21.048123396   16.95 16.45 14.4   ~ 521 2
6 7C 165211.80+395026.00 BLL 16 53 52.21668403 +39 45 36.6088754 14.09 14.15 13.29 8.26   ~ 2172 2
7 QSO B1959+650 BLL 19 59 59.8520303688 +65 08 54.652536492     12.8 11.21   ~ 629 2
8 DR 21 SFR 20 39 01.6 +42 19 38           O4.5 1058 0
9 3C 461 BL? 23 23 24.000 +58 48 54.00     14.30     ~ 2799 1
10 QSO B2344+514 BLL 23 47 04.8372110928 +51 42 17.877513168     15.50 10.7   ~ 465 0

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