Very High Energy $γ$-ray and Near Infrared observations of 1ES2344+514 during 2004-05

Details Very High Energy $γ$-ray and Near Infrared observations of 1ES2344+514 during 2004-05 Very High Energy $γ$-ray and Near Infrared observations of 1ES2344+514 during 2004-05

2007-04-26

arxiv.org/abs/0704.3533v1

J.Phys.G34:1683-1696,2007

Astronomy and Astrophysics

Astrophysics

15 pages, 6 figures, 4 tables, accepted for publication in Journal of Physics G

Scientific paper

10.1088/0954-3899/34/7/009

We have observed the BL Lac object 1ES2344+514 (z = 0.044) in Very High Energy (VHE) gamma-ray and near-infrared wavelength bands with TACTIC and MIRO telescopes respectively. The observations were made from 18th October to 9th December 2004 and 27th October 2005 to 1st January 2006. Detailed analysis of the TACTIC data indicates absence of a statistically significant gamma-ray signal both in overall data and on a nightly basis from the source direction. We estimate an upper limit of I($\geq$1.5 TeV)$\leq 3.84 \times 10^{-12}$ photons cm$^{-2}$ s$^{-1}$ at a 3$\sigma$ confidence level on the integrated $\gamma$-ray flux. In addition, we have also compared TACTIC TeV light curves with those of the RXTE ASM (2-12keV) for the contemporary period and find that there are no statistically significant increases in the signal strengths from the source in both these energy regions. During 2004 IR observations, 1ES2344+514 shows low level (~0.06 magnitude) day-to-day variation in both, J & H bands. However, during 2005 observation epoch, the source brightens up by about 0.41 magnitude from its October 2005 level J magnitude= 12.64 to J = 12.23 on December 6, 2005. It then fades by about 0.2 magnitude during 6 to 10 December, 2005. The variation is seen in both, J & H, bands simultaneously. The light travel time arguments suggest that the emission region size is of the order of $10^{17}$ cms.

Affiliated with

Also associated with

No associations

Rating

Very High Energy $γ$-ray and Near Infrared observations of 1ES2344+514 during 2004-05 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Very High Energy $γ$-ray and Near Infrared observations of 1ES2344+514 during 2004-05, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Very High Energy $γ$-ray and Near Infrared observations of 1ES2344+514 during 2004-05 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-373066