2011A&A...530A..77F


Query : 2011A&A...530A..77F

2011A&A...530A..77F - Astronomy and Astrophysics, volume 530A, 77-77 (2011/6-1)

Search for the shortest variability at gamma rays in flat-spectrum radio quasars.

FOSCHINI L., GHISELLINI G., TAVECCHIO F., BONNOLI G. and STAMERRA A.

Abstract (from CDS):

We report about the search for short-term variability in the high-energy γ-ray energy band of three flat-spectrum radio quasars (3C 454.3, 3C 273, PKS B1222+216), whose flux at E>100 MeV exceeded the value of 10–5ph/cm2/s for at least one day. Although, the statistics was not yet sufficient to effectively measure the characteristic time scale, it allowed us to set tight upper limits on the observed doubling time scale (<2-3h) - the smallest measured to date at MeV energies -, which can constrain the size of the γ-ray emitting region. The results obtained in the present work favor the hypothesis that γ rays are generated inside the broad-line region.

Abstract Copyright:

Journal keyword(s): quasars: individual: 3C 454.3 - quasars: individual: 3C 273 - quasars: individual: PKS B1222+216 - galaxies: jets - gamma-rays: galaxies

Simbad objects: 12

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Number of rows : 12
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 4C 21.35 QSO 12 24 54.4583467193 +21 22 46.385219365   17.56 17.50 18.2   ~ 591 2
2 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5458 1
3 3C 279 Bla 12 56 11.1664521013 -05 47 21.531840471   18.01 17.75 15.87   ~ 2800 2
4 QSO J1457-3539 BLL 14 57 26.71171326 -35 39 09.9714572   17.95 19.50 18.93   ~ 129 1
5 QSO B1502+1041 Bla 15 04 24.97978142 +10 29 39.1986151   18.97 18.56 18.94   ~ 491 1
6 QSO J1512-0906 Bla 15 12 50.53292491 -09 05 59.8295878   16.74 16.54     ~ 1197 1
7 QSO B1622-297 Bla 16 26 06.02083867 -29 51 26.9710860   18.41 20.5 17.6   ~ 383 0
8 4C 39.49 BLL 16 53 52.21668494 +39 45 36.6089458 14.09 14.15 13.29 8.26   ~ 1978 2
9 QSO B1730-130 QSO 17 33 02.70578476 -13 04 49.5481484   18 18.5 18.78 17.39 ~ 1025 1
10 QSO B1830-211 Bla 18 33 39.92 -21 03 39.9     18.70 21   ~ 575 1
11 QSO B2155-304 BLL 21 58 52.0651817803 -30 13 32.120657891   13.36 13.09 12.62   ~ 1610 1
12 3C 454.3 Bla 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2592 2

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2021.08.01-06:27:49

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