GRB follow-up team

A search for and investigation of optical rediation of pulsars and candidates into isolated neutron stars has been carried out in SAO RAS in cooperation with Astro-Space Center of Physical Institute of RAS (V.G.Kurt), Ioffe Physical-Technical Institute (Yu.A.Shibanov, A.B.Koptsevich), Penn State University (G.G.Pavlov)), Observatorio Astronomico Nacional SPM (S.V.Zharikov), Yamagata University (N. Kawai, Y. Urata), Rikkyo University of Tokyo (S. Shibata, N. Shibazaki)

The most complete data are now obtained for two objects: PSR B0656+14 and Geminga (PSR J0633+1746). BVRI spectra have been built, with features of possible non-thermal neture.

The data were also obtained for the following objects:

PSR B0950+08 (characteristic age τ = 10⁷ years, distance d ~ 260 pc) - a candidate for optical identification, R=25.53^m ± 0.25, S/N ~ 3.5. To confirm the identification and to study optical features of this NS the further BVI observations are necessary.

PSR J0814+7429 (τ = 10⁸ years, d ~ 310 pc) - the limit of optical brightness of the object in R band is R_c > 25.5^m.

PSR J0108-1431 (τ = 10⁸ years, d ~ 80 pc) - upper 3σ-limits of the pulsar magnitude are:
B > 24.9^m; V > 24.4^m; R_c > 24.1^m; I_c > 23.3^m.

PSR J1908+0734 (τ = 4 · 10⁶ years, d ~ 580 pc) - upper 3σ-limits of maagnitude (without allowing for reddening) were obtained to be:
B > 26.0^m, V > 26.1^m, R_c > 25.9^m, I_c > 23.4^m.

PSR B1951+32 (τ = 1.1 · 10⁵ years, d ~ 2.37 kpc) - deep BVRI images of the field were first obtained where the nucleus of the supernova CTB80 remnant associated with this nova is clearly seen. The results of photometry allow statement that the offered candidates into optical pulsar are emission knots of the nebula and background stars.

PSR B2334+61 (τ = 4.1 · 10⁴ years, d ~ 2.47 kpc) - BVRI images of the field were first obtained. The prelliminary results allow statement of detection in R band of an object coinciding in coordinates (within precision of astrometric refrence) with a radio pulsar. To confirm identification and construction of spectrum the further deeper observations are necessary.

Publications:

• V.G. Kurt, V.V. Sokolov, S.V. Zharikov, G.G. Pavlov, B.V. Komberg: "BVRI observations of PSR0656+14 with the 6-meter telescope" (astro-ph/9706076), 1998, A&A, 333, 547
• V.V. Sokolov, V.G. Kurt, S.V. Zharikov, Yu.A. Shibanov, A.B. Koptsevich: "Optical observations of Nearby Isolated Pulsars with the 6-Meter Telescope", Abstracts of the 19th Texas Symposium on Relativistic Astrophysiscs and Cosmology, Paris, France, Dec. 14-18, 1998, Eds: J. Paul, T. Montmerle, E. Aubourg (CEA Saclay)
• V.G. Kurt, V.N. Komarova, T.A. Fatkhullin, V.V. Sokolov, A.B. Koptsevich, Ya.A. Shibanov: "Photometric study of fields of nearby pulsars with the 6m telescope", 2000, Bulletin SAO, 49, 5
• V.N. Komarova, V.G. Kurt, A.B. Koptsevich, Ya.A. Shibanov, T.A. Fatkhullin, V.V. Sokolov: "Photometric investigation of the fields of nearby pulsars with the 6\,m telescope of SAO RAS", 2000, Abstracts of JENAM-2001, 96
• Yu. A. Shibanov, A. B. Koptsevich, V.V. Sokolov, S.V. Zharikov, G.G. Pavlov, V.G. Kurt, V.N. Komarova: "Optical photometry of the PSR B0656+14 and its neigbourhood", 2000, Abstracts of JENAM-2001, 99
• A. B. Koptsevich, G.G. Pavlov, S.V. Zharikov, Yu. A. Shibanov, V.V. Sokolov, V.G. Kurt: "Optical photometry of PSR B0656+14 and its neigbourhood", 2001, A&A, 370, 1004
• V.G. Kurt, V.N. Komarova, V.V. Sokolov, T.A. Fatkhullin, A.B. Koptsevich, Yu.A. Shibanov: "Multiband photometry of Geminga", 2001, Bulletin SAO, 51, 21
• V.N.Komarova, V.G.Kurt, T.A.Fatkhullin, V.V.Sokolov, Yu.A.Shibanov, A.B.Koptsevich: "Multiband photometry of Geminga", 2001, Abstracts of the Conference on Physics of Neutron Stars, 24 (astro-ph/0106435)
• A.B.Koptsevich, G.G.Pavlov, S.V.Zharikov, V.V.Sokolov, Yu.A.Shibanov, V.G.Kurt: "Multiband photometry of the PSR B0656+14 and its neighborhood" 2001, Abstracts of the Conference on Physics of Neutron Stars, 26 (astro-ph/0106435)
• Yu.A.Shibanov: "Multiwavelength observations of isolated NSs: thermal emission vs nonthermal", 2001, Abstracts of the Conference on Physics of Neutron Stars, 38 (astro-ph/0106435)
• V.N.Komarova, V.G.Kurt, V.V.Sokolov, Yu. A.Shibanov: "Photometric study of the central part of CTB 80", 2001, Thesises of reports of VAK-2001, 94.
• V.N.Komarova, V.G.Kurt, Yu.A.Shibanov, A.B.Koptsevich, T.A.Fatkhullin, V.V.Sokolov: "Study of optical radiation of Geminag", 2001, Thesises of reports of VAK-2001, 95.