Recent Publications in Astronomy and Astrophysics

1. Real-time data acquisition and control system for the 349-pixel TACTIC atmospheric Cherenkov imaging telescope;
   K.K.Yadav, R. Koul, A. Kanda, A.K.Tickoo, R.C.Rannot, P. Chandra, N. Bhatt, N. Chouhan, K. Venugopal, M. Kothari, H.C.Goyal, V.K.Dhar, S.K.Kaul;
   NIM (A) 527 (2004) 411-422.
    
2. Programmable topological trigger generator for the 349-pixel imaging camera of the TACTIC telescope;
   S.R.Kaul, R. Koul, I.K.Kaul, A.K.Tickoo, K.K.Yadav, M.L.Sapru, C.L.Bhat;
   NIM A 496 (2003) 400-412.
    
3. Examining the feasibility of air shower core-location from polarization properties of associated Cerenkov light;
   V. Gokhale, R.C. Rannot, A.K.Tickoo, S. Bhattacharyya and C.L.Bhat;
   Exp. astr. (2001), 12 195-209 (published in Feb. 2003).
    
4. A continuous injection plasma model for the X-ray/radio knots in kpc-scale jets of AGN;
   S. Sahaynathan, R. Misra, A.K. Kembhavi & C.L. Kaul;
   Astrophysical Journal Letters (2003), 588, L77 (May 10, 2003).
    
5. The effect of non-thermal protons on the high-energy spectra of black hole binaries;
   S. Sahaynathan, N. Bhatt, R. Misra and C.L.Kaul;
   Astrophysical Journal (2003), 595, 317.
    
6. Multi-fractal and wavelet analysis for cosmic ray mass-composition studies using the TACTIC telescope;
   C.K. Bhat and R.K.Kaul;
   BASI (2003), 31, 499 (proc. XXI ASI meeting).
    
7. Recent observations of 1ES2344+514 and PSR 0355+54 with TACTIC Imaging Element;
   A.K.Tickoo, V.K.Dhar, K.K. Yadav, R.C.Rannot, S. Bhattacharyya, P.Chandra, H.C. Goyal, C.L.Kaul, R.K.Kaul, M. Kothari, S.Kotwal, R.Koul, S.Sahayanathan, M.L.Sapru, M.Sharma, K.Venugopal, N. Bhatt and C.L.Bhat, (2002);
   Bulletin of Astronomical Soc. of India, 30, 775-776.
    
8. Effect of Particle Acceleration Process on the Flare characteristics of Blazars;
   S. Bhattacharyya, S. Sahayanathan, and C.L.Kaul;
   J. Astrophys. Astr.; 23 (2002) 95-99.
    
9. Image and non-image parameters of atmospheric Cherenkov events: a comparative study of their g-ray/hadron classification potential in ultrahigh energy regime;
   A.Razdan, A.Haungs, H.Rebel and C.L. Bhat;
   Astroparticle Physics, 17 (2002) 497-508.
    
10. On the final state of spherical gravitational collapse;
    A.Mitra;
    Foundation of Physics Letters, 15 (2002) 439-471.
     
11. TeV gamma-ray flux estimates from EGRET supernova remnant sources;
    R.K.Kaul;
    Bulletin of Astronomical Soc. of India (2001); 29, 371.
     
12. TACTIC Imaging Gamma Ray Telescope – a simulation study of the effect of switched off pixels on its quality factor;
    S.K.Charagi, M.K.Koul, M.L.Sapru and C.L.Bhat;
    Exp. Astron. (2001); 11, 71.
     
13. On single counts rate stabilization scheme employed in Imaging Camera of the TACTIC gamma-ray telescope;
    N.Bhatt, K.K.Yadav, A.Kanda, R.Koul, S.R.Kaul, H.C.Goyal, V.K.Dhar, S.K.Kaul, K.Venugopal, A.K.Tickoo, I.K.Kaul, M.Kothari and C.L.Bhat;
    Meas. Sci & Tech., (2001); 12, 167.
     
14. Artificial Neural network approach for reconstruction of event arrival-direction in wide-angle atmospheric Cerenkov detector arrays : a feasibility study;
    V.K.Dhar, A.K.Tickoo, R.Koul and C.L.Bhat;
    Experimental Astronomy (2000); 10, 487-498.
     
15. Gamma-ray astronomy : a new Indian initiatives;
    C.L.Bhat;
    BASI (2000); 28, 235.
     
16. Coordinated TeV gamma-ray and optical polarization study of BL Lac object Mkn 501;
    U.C. Joshi, K.S.Baliyan, S. Ganesh, M.R. Deshpande, S. Bhattacharyya, R.K.Kaul, C.L.Kaul and C.L.Bhat;
    BASI (2000), 28, 409.
     
17. Drive control system for the TACTIC gamma-ray telescope;
    A.K.Tickoo, R.Koul, S.K.Kaul, I.K.Kaul, C.L.Bhat and N.G. Bhatt, M.K. Kothari, H.C. Goyal, N.K.Agarwal and S.R.Kaul;
    Experimental Astron. (1999); 9, 81.
     
18. First results on characterization of Cerenkov images through combined use of Hillas, fractal and wavelet parameters;
    A. Haungs, A.K.Razdan, C.L.Bhat, R.C.Rannot and H. Rebel;
    Astroparticle Physics (1999); 12, 145.
     

Recent Publications in other scientific activities

1. Wavelet correlation coefficient of ‘strongly correlated’ time series;
   Ashok Razdan,
   Physica A, 333 (2004) 335-342.
    
2. Lamb-Mossbauer factor using non-extensive statistics;
   Ashok Razdan,
   Physics Letters A, 321 (2004) 190-193.
    
3. Nuclear resonant scattering of synchrotron radiation from nuclei in Brownian motion;
   Ashok Razdan,
   Physica B, 327 (2003) 9, 14.
    
4. Atmospheric dust loads and their elemental composition at a background site in India;
   B.S. Negi, S.K. Jha, S.B. Chavan, S. Sadasivan, A. Goyal, M.L.Sapru and C.L. Bhat, (2002);
   Environmental Monitoring and Assessment, 73, 1-6.
    
5. Scaling in the Bombay stock exchange index;
   A. Razdan (2002);
   Journal of Physics; 58, 537-544.
    
6. Quantum limit on computational time and speed;
   A.K. Pati, S.R. Jain, A. Mitra, R.Ramanna;
   Physics Letters A (2002); 301, 125-129.
    
7. Estimation of gallium in a bauxite-ore deposit using energy-dispersive X-ray fluorescence technique;
   C.K. Bhat;
   Radiation Physics and Chemistry (2002), 65, 193-197.