LIST OF PUBLICATION
2017 86. A. C. Gupta, A. Mangalam, P. J. Wiita, P. Kushwaha, H. Gaur, H. Zhang, M. F. Gu,
M. Liao, G. C. Dewangan, L. C. Ho, P. Mohan, M. Uemura, M. Sasada, A. E. Volvach, A. Agarwal, M. F. Aller, H. D. Aller, R. Bachev, A. Lahteenmaki, E. Semkov, A. Strigachev, M. Tornikoski & L. N. Volvach, A peculiar multi-wavelength flare in the Blazar 3C 454.3, Monthly Notices of the Royal Astronomical Society, (in press) (2017) (arXiv: 1708.03504). 85. N. Kalita, A. C. Gupta, P. J. Wiita, G. C. Dewangan & K. Duorah,
Origin of X-rays in the low state of the FSRQ 3C 273: evidence of inverse Compton emission, Monthly Notices of the Royal Astronomical Society, 469, 3824-3839 (2017) (arXiv:1705.02721). 84. P. Chandra, ....., A. C. Gupta (26 authors), Multiwavelength study of VHE emission from Markarian 501 using TACTIC observations during April-May, 2012, New Astronomy, 54, 42-51 (2017) (arXiv:1701.04935). 83. A. Agarwal, P. Mohan, A. C. Gupta, A. Mangalam, A. E. Volvach, M. F. Aller, H. D. Aller, M. F. Gu, A. Lahteenmaki, M. Tornikoski & L. N. Volvach, Core shift effect in blazars, Monthly Notices of the Royal Astronomical Society, 469, 813-840 (2017) (arXiv:1704.03229). 82. A. Pandey, A. C. Gupta & P. J. Wiita, X-Ray Intraday Variability of Five TeV Blazars with NuSTAR, Astrophysical Journal, 841, 123 ( 81. A. C. Gupta, A. Agarwal, A. Mishra, H. Gaur, P. J. Wiita, M. F. Gu, O. M. Kurtanidze, G. Damljanovic, M. Uemura, E. Semkov, A. Strigachev, R. Bachev, O. Vince, Z. Zhang, B. Villarroel, P. Kushwaha, A. Pandey, T. Abe, R. Chanishvili, R. A. Chigladze, J. H. Fan, J. Hirochi, R. Itoh, Y. Kanda, M. Kawabata, G. N. Kimeridze, S. O. Kurtanidze, G. Latev, R. V. Munoz Dimitrova, T. Nakaoka, M. G. Nikolashvili, K. Shiki, L. A. Sigua & B. Spassov, Multiband optical variability of the blazar OJ 287 during its outbursts in 2015-2016, Monthly Notices of the Royal Astronomical Society, 465, 4423-4433 (2017) (arXiv:1611.07561). 80. P. Kushwaha, A. C. Gupta, R. Misra & K. P. Singh, Multiwavelength temporal variability of the blazar 3C 454.3 during 2014 activity phase, Monthly Notices of the Royal Astronomical Society, 464, 2046-2052 (2017) (arXiv:1609.06952). 2016
79. A. C. Gupta, N. Kalita, H. Gaur & K. Duorah, Peak of spectral energy distribution plays an important role in intra-day variability of blazars? Monthly Notices of the Royal Astronomical Society, 462, 1508-1516 (2016) (arXiv:1607.02053). 78. A. C. Gupta, A. Agarwal, J. Bhagwan, A. Strigachev, R. Bachev, E. Semkov, H. Gaur, G. Damljanovic, O. Vince & P. J. Wiita, Multiband optical variability of three TeV blazars on diverse time-scales, Monthly Notices of the Royal Astronomical Society, 458, 1127-1137 (2016) (arXiv:1602.04200). 77. J. Bhagwan, A. C. Gupta, I. E. Papadakis & P. J. Wiita, Flux and spectral variability of the blazar PKS 2155 -304 with XMM-Newton: Evidence of particle acceleration and synchrotron cooling, New Astronomy, 44, 21-28 (2016) (arXiv:1510.02817). 76. P. Mohan, A. C. Gupta, R. Bachev & A. Strigachev, Kepler light-curve analysis of the blazar W2R 1926+42, Monthly Notices of the Royal Astronomical Society, 456, 654-664 (2016) (arXiv:1511.05232). 75. A. Agarwal, A. C. Gupta, R. Bachev, A. Strigachev, E. Semkov, P. J. Wiita, J. H. Fan, U. S. Pandey, S. Boeva & B. Spassov, Multiband optical variability of the blazar S5 0716+714 in outburst state during 2014-2015, Monthly Notices of the Royal Astronomical Society, 455, 680-690 (2016) (arXiv:1510.02816). 2015
74. , , , , , , J. A. de Diego,, H. Guo, R. Joshi, B. Mihov, N. Palma, S. Peneva, A. Rajasingam & L. Slavcheva-Mihova, Nature of intranight optical variability of BL Lacertae, Monthly Notices of the Royal Astronomical Society, 452, 4263-4273 (2015) (arXiv:1508.00953). 73. , , , , , , , , , , , , , , , , , , & Optical and radio variability of BL Lacertae, Astronomy & Astrophysics, 582, A103 ( 72. P. Mohan, A. Agarwal, A. Mangalam, A. C. Gupta, P. J. Wiita, A. E. Volvach, M. F. Aller, H. D. Aller, M. F. Gu, A. Lahteenmaki, M. Tornikoski & L. N. Volvach, Frequency-dependent core shifts and parameter estimation for the blazar 3C 454.3 Monthly Notices of the Royal Astronomical Society, 452, 2004-2017 (2015) (arXiv:1506.07137). 71. A. Agarwal, A. C. Gupta, R. Bachev, A. Strigachev, E. Semkov, P. J. Wiita, M. Bottcher, S. Boeva, H. Gaur, M. F. Gu, S. Peneva, S. Ibryamov & U. S. Pandey Multiband optical-NIR variability of blazars on diverse time-scales Monthly Notices of the Royal Astronomical Society, 451, 3882-3897 (2015) (arXiv:1506.00601). 70. N. Kalita, A. C. Gupta, P. J. Wiita, J. Bhagwan & K. Duorah Multiband variability in the blazar 3C 273 with XMM-Newton Monthly Notices of the Royal Astronomical Society, 451, 1356-1365 (2015) (arXiv:1506.00586). 69. M. Hayashida, ......, A. C. Gupta (52 authors) Rapid Variability of Blazar 3C 279 during Flaring States in 2013-2014 with Joint Fermi-LAT, NuSTAR, Swift, and Ground-Based Multiwavelength Observations The Astrophysical Journal, 807, 79 68. A. Agarwal & A. C. Gupta Multiband optical variability studies of BL Lacertae Monthly Notices of the Royal Astronomical Society, 450, 541-551 (2015) (arXiv:1506.00574) 67. K. K. Singh, ......, A. C. Gupta (25 authors) Search for TeV gamma-ray emission from blazar 1ES 1218+304 with TACTIC telescope during March - April 2013 New Astronomy, 36, 1- 8 (2015) (arXiv:1410.2369). 66. A. Agarwal & A. C. Gupta Optical-NIR variability of blazars on diverse timescales Astronomical Society of India Conference Series, 12, 141-142 (2015). 65. A. C. Gupta Optical and X-ray Variability of Blazars Astronomical Society of India Conference Series, 12, 77-78 (2015). 2014
64. J. Bhagwan, A. C. Gupta, I. E. Papadakis & P. J. Wiita Spectral energy distributions of the BL Lac PKS 2155 - 304 from XMM-Newton Monthly Notices of the Royal Astronomical Society, 444, 3647-3656 (2014) (arXiv:1409.29.63). 63. A. C. Gupta Quasi Periodic Oscillations in Blazars Journal of Astrophysics and Astronomy, 35, 307-314 (2014). 62. H. Gaur, A. C. Gupta, P. J. Wiita, M. Uemura, R. Itoh & M. Sasada Anti-correlated Optical Flux and Polarization Variability in BL Lac Astrophysical Journal Letters, 781, L4 (5pp) (2014) (arXiv:1312.0939). 2013
61. G. Bhatta, ......, A. C. Gupta, et al. (46 authors) The 72-h WEBT microvariability observation of blazar S5 0716+714 in 2009 Astronomy & Astrophysics, 558, A92 (10pp) (2013) (arXiv:1310.4670). 60. B. Rani, ......, A. C. Gupta, et al. (37 authors) Radio to gamma-ray variability study of blazar S5 0716+714 Astronomy & Astrophysics, 552, A11 (24pp) (2013) (arXiv:1301.7087). 2012
33. M. H. P. M. van Putten & A. C. Gupta59. A. C. Gupta & M. H. P. M. van Putten Observational evidence for black hole spin down in Swift/BAT data of long GRBs Bulletin of the Astronomical Society of India Conference Series, 5, 123-127 (2012). 58. H. Gaur, A. C. Gupta, A. Strigachev, R. Bachev, E. Semkov, P. J. Wiita, S. Peneva, S. Boeva, L. Slavcheva-Mihova, B. Mihov, G. Latev & U. S. Pandey Optical Flux and Spectral Variability of Blazars Monthly Notices of the Royal Astronomical Society, 425, 3002-3023 (2012) (arXiv:1207.5943). 57. A. C. Gupta, T. P. Krichbaum, P. J. Wiita, et al. Multi-wavelength Intraday Variability of the BL Lac S5 0716+714 Monthly Notices of the Royal Astronomical Society, 425, 1357-1370 (2012) (arXiv:1207.5942). 56. R. Bachev, E. Semkov, A. Strigachev, A. C. Gupta, H. Gaur, B. Mihov & S. Boeva The nature of the intra-night optical variability in Blazars Monthly Notices of the Royal Astronomical Society, 424, 2625-2634 (2012) (arXiv:1207.5945). 55. H. Gaur, A. C. Gupta, A. Strigachev, R. Bachev, E. Semkov, P. J. Wiita, S. Peneva, S. Boeva, N. Kacharov, B. Mihov & E. Ovcharov Quasi-simultaneous two band optical intra-day variability of blazars 1ES 1959+650 and 1ES 2344+514 Monthly Notices of the Royal Astronomical Society, 420, 3147-3162 (2012) (arXiv.1112.3125). 54. R. Joshi, H. Chand, P. J. Wiita, A. C. Gupta & R. Srianand Probing spectral properties of radio-quiet quasars searched for optical microvariability - II Monthly Notices of the Royal Astronomical Society, 419, 3433-3446 (2012) (arXiv:1110.2334). 53. S. P. Gupta, U. S. Pandey, K. Singh, B. Rani, J. Pan, J. H. Fan & A. C. Gupta Optical Intra-day Variability Timescales and Black Hole Mass of the Blazars New Astronomy, 17, 8-17 (2012). 52. H. Gaur, A. C. Gupta & P. J. Wiita Multi-wavelength Variability of the blazars Mrk 421 and 3C 454.3 in the High-State Astronomical Journal, 143, 23 (13pp) (2012) (arXiv:1112.3126). 2011
51. E. Semkov, R. Bachev, A. Strigachev, S. Peneva & A. C. Gupta A search for rapid optical variability in low-mass Seyfert galaxies: NGC 4395 Bulgarian Astronomical Journal (2011) (in press). 50. B. Rani, A. C. Gupta, R. Bachev, A. Strigachev, E. Semkov, F. D'Ammando, P. J. Wiita, M. A. Gurwell, E. Ovcharov, B. Mihov, S. Boeva & S. Peneva Spectral energy distribution variation in BL Lacs and FSRQs: SED variability studies of Blazars Monthly Notices of the Royal Astronomical Society, 417, 1881-1890 (2011) (arXiv:1107.0597). 49. B. Rani, A. C. Gupta & P. J. Wiita Variability of the Spectral Energy Distribution of the Blazar S5 0716+714 Journal of Astrophysics and Astronomy, 32, 217-222 (2011) (arXiv:1012.1774). 48. A. C. Gupta UV and X-ray Variability of Blazars Journal of Astrophysics and Astronomy, 32, 155-161 (2011). 47. P. Mohan, A. Mangalam, H. Chand & A. C. Gupta Re-Analysis of QPO in 3C 273 Light Curve Journal of Astrophysics and Astronomy, 32, 117-120 (2011). 46. R. Bachev, E. Semkov, N. Kacharov, A. C. Gupta, E. Ovcharov & A. Strigachev Photometric study of the close eclipsing binary MM Dra Bulgarian Astronomical Journal, 15, 93-96 (2011). 45. B. Rani, A. C. Gupta, U. C. Joshi, S. Ganesh & P. J. Wiita Optical Intraday Variability Studies of Ten Low Energy Peaked Blazars Monthly Notices of the Royal Astronomical Society, 413, 2157-2172 (2011) (arXiv:1101.0711). 44. R. Joshi, H. Chand, A. C. Gupta & P. J. Wiita
Optical Micro-variability Properties of BALQSOs Monthly Notices of the Royal Astronomical Society, 412, 2717-2728 (2011) (arXiv:1011.5611). 43. R. Bachev, E. Semkov, A. Strigachev, B. Mihov, A. C. Gupta, S. Peneva, E. Ovcharov, A. Valcheva & A. Lalova Intranight variability of 3C 454.3 during its 2010 November outburst Astronomy & Astrophysics Letters, 528, L10-L13 (2011) (arXiv:1102.3307) 2010
42.
B. Rani, A.
C. Gupta, U. C.
Joshi, S. Ganesh & P. J. Wiita
Quasi Periodic Oscillations of ~ 15 Minutes in the Optical Light Curve of the BL Lac S5 0716+714 Astrophysical Journal Letters, 719, L153-L157 (2010) (arXiv:1007.2973). 41. Y.-P. Qin, A. C. Gupta, J. H. Fan, C.-Y. Su & R.-J. Lu Duration distributions for different softness groups of gamma-ray bursts. Science China : Physics, Mechanics & Astronomy, 53, 1375-1382 (2010). 40. H. Gaur, A. C. Gupta, P. Lachowicz & P. J. Wiita Detection of intra-day variability timescale of 4 high-energy peaked blazars with XMM-Newton Astrophysical Journal, 718, 279-291 (2010) (arXiv:1005.4475). 39. B. Rani, A. C. Gupta, A. Strigachev, R. Bachev, E. Semkov, P. J. Wiita, E. Ovcharov, B. Mihov, S. Boeva, S. Peneva, B. Spasov, S. Tsvetkova, K. Stojanov & A. Valcheva Short Term Flux and Colour Variations in Low Energy Peaked Blazars. Monthly Notices of the Royal Astronomical Society, 404, 1992-2017 (2010) (arXiv:1001.5206). 38. H. Chand, P. J. Wiita & A. C. Gupta Probing spectral properties of radio-quiet quasars searched for optical microvariability. Monthly Notices of the Royal Astronomical Society, 402, 1059-1071 (2010) (arXiv:0910.5292). 37. E. Semkov, R. Bachev, A. Strigachev, A. C. Gupta, B. Rani, H. Gaur, E. Ovcharov, B. Mihov, A. Valcheva, S. Peneva, S. Boeva & N. Kacharov Short term optical variability of blazars: first results from joint international collaboration. Bulgarian Astronomical Journal, 14, 1-5 (2010). 2009
36.
C. M. Raiteri,
........, A. C. Gupta, et al. (69 authors)
WEBT multiwavelength monitoring and XMM-Newton observations of BL Lacertae in 2007-2008. Unveiling different emission components Astronomy & Astrophysics, 507, 769-779 (2009) (arXiv:0909.1701). 35.
P. Lachowwicz, A.
C. Gupta, H. Gaur
& P. J. Wiita
A ~4.6 h quasi-periodic oscillation in the BL Lacertae PKS 2155-304? Astronomy & Astrophysics Letters, 506, L17-L20 (2009) (arXiv:0909.2113). 34. B. Rani, P. J. Wiita & A. C. Gupta Nearly Periodic Fluctuations in the Long-term X-Ray Light Curves of the Blazars AO 0235+164 and 1ES 2321+419 Astrophysical Journal, 696, 2170 - 2178 (2009) (arXiv:0903.2606). Non-thermal Transient Sources from Rotating Black Holes. Monthly Notices of the Royal Astronomical Society, 394, 2238 - 2246 (2009) (arXiv:0901.1674). 32. M. Bottcher, ......., A. C. Gupta, et al. (54 authors) The Whole Earth Blazar Telescope Campaign on the Intermediate BL Lac Object 3C 66A in 2007 - 2008, Astrophysical Journal, 694, 174 - 182 (2009) (arXiv:0811.0501). 31. A. C. Gupta & W. Yuan Quasi Simultaneous Two Band Optical Micro-variability of Luminous Radio-Quiet QSOs. New Astronomy, 14, 88-96 (2009) (arXiv:0805.4278). 30. A. C. Gupta, A. K. Srivastava & P. J. Wiita Periodic Oscillations in the Intra-day Optical Light Curves of the Blazar S5 0716+714. Astrophysical Journal, 690, 216 - 223 (2009) (arXiv:0808.3630). 2008
29. A. C. Gupta, S-M Cha, S. Lee, H. Jin, S. Pak, Seoung-hyun Cho, B. Moon, Y. Park, In-Soo Yuk, Uk-won Nam & Jae-Mann Kyeong Multi-color Near-Infrared Intra-day and Short Term Variability of the Blazar S5 0716+714. Astronomical Journal, 136, 2359 - 2366 (2008) (arXiv:0809.3295). 28. V. M. Larionov, ......., A. C. Gupta, et al. (71 authors) Results of WEBT, VLBA and RXTE monitoring of 3C 279 during 2006 - 2007. Astronomy and Astrophysics, 492, 389 - 400 (2008) (arXiv: 0810.4261). 27. C. M. Raiteri, ....., A. C. Gupta, et al. (75 authors) A new activity phase of the blazar 3C 454.3: Multifrequency observations by the WEBT and XMM-Newton in 2007 - 2008. Astronomy and Astrophysics, 491, 755 - 766 (2008) (arXiv:0810.2424). 26. Y. P. Qin, A. C. Gupta, J. H. Fan & R.-J. Lu Two types of softening detected in X-ray afterglows of Swift bursts: internal and external origins? Journal of Cosmology and Astroparticle Physics, 11, 004 (2008) (arXiv:0810.4379). 25. J. H. Fan, Y. H. Yuan, Y. Liu, T. X. Hua, G. E. Romero, Y. -W. Zhang, J.-B. Su, A. C. Gupta H. Liu, Y. Huang, G. Qian, J. S. Zhang, H. G. Wang, J. Y. Zhang & J. Tao Radio Polarization Properties for Blazars Publication of the Astronomical Society of Japan, 60, 707 - 713 (2008). Erratum: Publication of the Astronomical Society of Japan, 60, 1217 - 1217 (2008). My name Alok C. Gupta was published Alok G. Gupta. 24. A. C. Gupta, B. S. Acharya, D. Bose, V. R. Chitnis & J. H. Fan Simultaneous multi-wavelength observations of the TeV Blazar Mrk 421 during February - March 2003: X-ray and NIR correlated variability. Chinese Journal of Astronomy and Astrophysics, 8, 395 - 403 (2008) (arXiv:0801.1259). 23. A. C. Gupta, W. G. Deng, U. C. Joshi, J. M. Bai & M. G. Lee Multi-color Optical Variability of the TeV Blazar Mrk 501 in the Low-State. New Astronomy, 13, 375-384 (2008) (arXiv:0801.1211). 22. B. Czerny, A. Siemiginowska, A. Janiuk & A. C. Gupta The nature of the intranight variability of radio-quiet quasars. Monthly Notices of the Royal Astronomical Society, 386, 1557-1567 (2008) (arXiv:0802.4396). 21. A. C. Gupta, J. H. Fan, J. M. Bai & S. J. Wagner Optical Intra-day Variability in Blazars. Astronomical Journal, 135, 1384-1394, (2008) (arXiv:0801.1217). 20. C. M. Raiteri, ....., A. C. Gupta, et al. (61 authors) Radio-to-UV monitoring of AO 0235+164 by the WEBT and Swift during the 2006-2007 outburst. Astronomy and Astrophysics, 480, 339-347, (2008) (arXiv:0801.1236). 2007
19. L. Z. Lu, Y.-P. Qin, & A. C. Gupta A subset of quasars identified by large values of their Doppler redshift. Astrophysical Journal, 669, 74-84, (2007). 18. C. M. Raiteri, ....., A. C. Gupta, et al. (76 authors) WEBT and XMM-Newton observations of 3C 454.3 during the post-outburst phase: Detection of the little and big blue bumps. Astronomy and Astrophysics, 473, 819-827, (2007) (arXiv:0708.2793). 17. D. Bose, V. R. Chitnis, P. R. Vishwanath, P. Majumdar, M. A. Rahman, B. B. Singh, A. C. Gupta & B. S. Acharya Observations of AGNs using PACT. Astrophysics and Space Science, 309, 111-117, (2007) (astro-ph/0611467). 16. J. H. Fan, Y. Liu, Y. H. Yuan, T. X. Hua, H. G. Wang, Y. X. Wang, J. H. Yang, A. C. Gupta, J. Li, J. L. Zhou, S. X. Xu, & J. L. Chen Radio Variability Properties for Radio Sources. Astronomy and Astrophysics, 462, 547-552, (2007) (astro-ph/0701540). 2006
15. J. H. Fan, Y. Liu, Y. H. Yuan, H. G. Wang, Y. X. Wang, A. C. Gupta, J. H. Yang, J. Li, J. L. Zhou, S. X. Xu, J. L. Chen, F. Liu & Y. Z. Li Radio Variability Properties of a Sample of 168 Radio Sources: Periodicity Analysis. Chinese Journal of Astronomy and Astrophysics Supplement 2, 6, 333-336, (2006). 14. J. H. Fan, J. Tao, B. C. Qian, A. C. Gupta, Y. Liu, Y.-H. Yuan, J.-H. Yang, H. G. Wang & Y. Huang Optical Photometrical Observations and Variability for Quasar 4C 29.45. Publication of the Astronomical Society of Japan, 58, 797-808, (2006) (astro-ph/0610227). 13. Y.-P. Qin, C.-Y. Su, J. H. Fan & A. C. Gupta Hardness ratio evolutionary curves of gamma-ray bursts expected by the curvature effect. Physical Review D, 74, 063005, (2006) (astro-ph/0701078). 2005
12. A. C. Gupta & U. C. Joshi Intra-night Optical Photometric Variability of Luminous Radio-Quiet Quasars. Astronomy and Astrophysics, 440, 855-865, (2005) (astro-ph/0505625). 11. C. S. Stalin, A. C. Gupta, Gopal-Krishna, P. J. Wiita & R. Sagar Intranight optical variability of BL Lacs, radio-quiet quasars and radio-loud quasars. Monthly Notices of the Royal Astronomical Society, 356, 607-614, (2005) (astro-ph/0410156). 2004
10. A. C. Gupta, D. P. K. Banerjee, N. M. Ashok & U. C. Joshi Near Infrared Intraday Variability of Mrk 421. Astronomy and Astrophysics, 422, 505-508, (2004) (astro-ph/0405186). 09. J. H. Fan, O. M. Kurtanidze, M. G. Nikolashvili, A. C. Gupta, J.-S. Zhang & Y.-H. Yuan Optical Photometric Observations of Gamma-Ray Loud Blazars. Chinese Journal of Astronomy and Astrophysics, 4, 133-142 (2004). 2002
08. A. C. Gupta, U. C. Joshi & J. H. Fan Optical Variability of Gamma-Ray Loud Blazars. Astrophysics and Space Science, 282, 655-668, (2002). 2000
07. A. C. Gupta, A. Subramaniam, R. Sagar & W. K. Griffiths A complete photometric study of the open cluster NGC 7790 containing Cepheid variables. Astronomy and Astrophysics Supplement Series, 145, 365-375, (2000). 06. Gopal - Krishna, A. C. Gupta, R. Sagar, P. J. Wiita, U. S. Chaubey & C. S. Stalin Rapid optical variability in radio-quiet QSOs. Monthly Notices of the Royal Astronomical Society, 314, 815-825, (2000). 05. R. Sagar, ...., A. C. Gupta, et al. (19 authors) Site characterization for the UPSO - TIFR Telescope. Bulletin of the Astronomical Society of India, 28, 429-435, (2000). 04. R. Sagar, ...., A. C. Gupta, et al. (18 authors) Evaluation of Devsthal site for optical astronomical observation. Astronomy and Astrophysics Supplement Series, 144, 349-362, (2000). 03. J. J. Wang, L. Chen, Z.-Y. Wu, A. C. Gupta & M. Geffert Kinematics and CMD of the globular cluster NGC 4147. Astronomy and Astrophysics Supplement Series, 142, 373-387, (2000). 1998
02. J. J. Wang & A. C. Gupta Absolute proper motions and the colour - magnitude diagram of the globular cluster NGC 4147. Chinese Astronomy and Astrophysics, 22, 352-360, (1998). 01. U. S. Pandey & A. C. Gupta Equilibria of self - gravitating gaseous disks Bulletin of the Astronomical Society of India, 26, 731-737, (1998).
11. P. J. Wiita, H. Gaur, A. C. Gupta & P. Lachowicz Possible Quasi-Periodic Oscillations in Blazars American Physical Society Meeting (Nov. 11-14, 2009), Atlanta, USA (submitted). 10. P. J. Wiita, A. C. Gupta, B. Rani & A. K. Srivastava Nearly Periodic Variability in Both Optical and X-ray Emission from the Blazar S5 0716+714 AAS Meeting 213, Bulletin of the American Astronomical Society, Vol. 41, p.382 (2009). 09. HyunJoo Gho, ...., A. C. Gupta, et al. (9 authors) Optical Variability of double-peak structure blazar OJ 287 in 2003-2007 APRIM 2008, Kunming, China (August 2008)} (submitted). 08. S. Pak, A. C. Gupta, J. Kwon, M. Tamura & S. Sato Near-Infrared Polarization Variability in the Blazar 3C 279 Astronomical Polarimetry 2008 in Canada - (July 6-11, 2008) (submitted). 07. S. Lee, S-M Cha, H. Jin, A. C. Gupta, S. Pak, Uk-won Nam, In-Soo Yuk, Y. Park, B. Moon, Seoung-hyun Cho & Jae-Mann Kyeong Near-Infrared Observations of the Blazar S5 0716+714 using KASINICS Korean Astronomical Society Meeting, (2008) (in press). 06. S. Pak, A. C. Gupta, J. Kwon, J. Bai & S. Sato Near-infrared Inter-day Polarization and Photometric Variability in the Blazar 3C 279 American Astronomical Society (AAS), Meeting, 211, 0410 (2007). 05. A. C. Gupta, W. Yuan, X. Dong, T. Ji, H.-Y. Zhou & J. M. Bai BL Lac Objects in Sloan Digital Sky Survey (SDSS) in The Central Engine of Active Galactic Nuclei, eds. L. C. Ho & J-M. Wang (Astronomical Society of the Pacific: San Francisco), ASP Conference Series, Vol. 373, p. 741-742 (2007). 04. A. C. Gupta, B. S. Acharya, D. Bose, V. R. Chitnis & J. H. Fan Simultaneous Multi-wavelength Variability of the TeV Blazar Mrk 421 29th International Cosmic Ray Conference Proceedings, 4, 351-354 (2005) eds.B. S. Acharya, et al. 03. A. C. Gupta Variability of Active Galactic Nuclei Bulletin of the Astronomical Society of India, 33, 344 (2005). 02. A. C. Gupta CCD Photometric Observations of the Galactic Globular Clusters NGC 1904 and NGC 6341 (astro-ph/0311443) (2003). 01. J. J. Wang & A. C. Gupta Absolute proper motions and BVRI photometry of 115 stars in the region of the globular cluster NGC 4147 Ann. Shanghai Observatory, Acad. Sin., 19, 28-34 (1998).
02. A. C. Gupta GRB 070223: Optical observations GCN Circular No. 6136, (2007) 01. A. C. Gupta & J. M. Bai GRB 061028: Optical R passband observations GCN Circular No. 5779, (2006). D. Astronomers Telegrams
03. A. C. Gupta, B. Rani,
H. Gaur, T. Krichbaum, L. Fuhrmann, N. Marchili,
I. Agudo,
M. Boettcher, N. Palma & K. Hawkins Blazar S5 0716+714 is in Optical Outburst State? Astronomers Telegram #2353 (2009). 02. A. C. Gupta, H. Gaur & B. Rani Strong Optical Flaring after Super Gamma-ray Flare detected in the Blazar 3C 454.3 Astronomers Telegram #2352 (2009). 01. A. C. Gupta, H. Gaur & B. Rani Optical Flaring in the Blazar OJ 287 Astronomers Telegram #2314 (2009). |
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