Castro-Tirado, Alberto J., Ugarte Postigo, A. De, Gorosabel, J., Jelínek, M., Fatkhullin, T. A., Sokolov, V. B., ...
This work is based on observations carried out with the 0.3-m robotic telescope at the Spanish BOOTES-2 astronomical station of the Estación Experimental de La Mayora (CSIC), the 0.4-m WATCHER...
Optical and infrared flares from a transient Galactic soft gamma-ray repeater (2008)
Castro-Tirado, A. J., Postigo, A. De Ugarte, Gorosabel, J., Jelinek, M., Fatkhullin, T. A., Sokolov, V. V., ...
Soft gamma-ray repeaters (SGRs) are a rare type of gamma-ray transient sources that are ocasionally detected as bursts in the high-energy sky. They are thought to be produced by magnetars, young...
The complex light-curve of the afterglow of GRB071010A (2008)
Covino, S., D'Avanzo, P., Klotz, A., Perley, D. A., Amati, L., Campana, S., ...
We present and discuss the results of an extensive observational campaign devoted to GRB071010A, a long-duration gamma-ray burst detected by the Swift satellite. This event was followed for almost a...
The complex light curve of the afterglow of GRB 071010A (2008)
Covino, S., D'Avanzo, P., Klotz, A., Perley, D. A., Amati, L., Campana, S., ...
The dark nature of GRB 051022 and its host galaxy (2007)
Castro-Tirado, A. J, Bremer, M, McBreen, S, Gorosabel, J, Guziy, S, Fakthullin, T. A, ...
Aims.We present multiwavelength (X-ray/optical/near-infrared/millimetre) observations of GRB 051022 between 2.5 h and ~1.15 yr after the event. It is the most intense gamma-ray burst (~10-4 erg cm-2)...
The dark nature of GRB 051022 and its host galaxy (2007)
Castro-Tirado, A. J., Bremer, M., McBreen, S., Gorosabel, J., Guziy, S., Delgado, R. M. Gonzalez, ...
We present multiwavelength (X-ray/optical/near-infrared/millimetre) observations of GRB 051022 between 2.5 hours and ~1.15 yr after the event. It is the most intense gamma-ray burst (~ 10^-4 erg...
Swift observations of GRB 060614: an anomalous burst with a well behaved afterglow (2007)
Mangano, V., Holland, S. T., Malesani, D., Troja, E., Chincarini, G., Zhang, B., ...
GRB 060614 is a remarkable GRB observed by Swift with puzzling properties, which challenge current progenitor models. The lack of any bright SN down to very strict limits and the vanishing spectral...
The nature of the outflow in gamma-ray bursts (2007)
Kumar, P., McMahon, E., Panaitescu, A., Willingale, R., O'Brien, P., Burrows, D., ...
The Swift satellite has enabled us to follow the evolution of gamma-ray burst (GRB) fireballs from the prompt gamma-ray emission to the afterglow phase. The early x-ray and optical data obtained by...
GRB 051028: an intrinsically faint GRB at high redshift? (2007)
Castro-Tirado, A. J., Jelinek, M., Pandey, S. B., McBreen, S., De Jong, J., Sahu, D. K., ...
We present multiwavelength observations of the gamma-ray burst GRB 051028 detected by HETE-2 in order to derive its afterglow emission parameters and to determine the reason for its optical faintness...
Trigger 255685: Swift detection of a possible burst (2007)
Palmer, D.M., Barthelmy, S.D., Beardmore, A.P., Burrows, D.N., Cummings, J.R., Evans, P.A., ...
Not Available
The dark nature of GRB 051022 and its host galaxy (2007)
Castro-Tirado, A. J., Bremer, M., McBreen, S., Gorosabel, J., Guziy, S., Fakthullin, T. A., ...
Postigo, A De Ugarte, Fatkhullin, T. A., Johannesson, G., Gorosabel, J., Sokolov, V. V., Castro-Tirado, A. J., ...
Aims. Understand the shape and implications of the multiband light curve of GRB 050408, an X-ray rich (XRR) burst. Methods. We present a multiband optical light curve, covering the time from the...
Extreme Properties Of GRB061007: A Highly Energetic Or A Highly Collimated Burst? (2006)
Schady, P., De Pasquale, M., Page, M. J., Vetere, L., Pandey, S. B., Wang, X. Y., ...
GRB061007 is the brightest gamma-ray burst (GRB) to be detected by Swift and is accompanied by an exceptionally luminous afterglow that had a V-band magnitude
Extreme Properties Of GRB061007: A Highly Energetic OR Highly Collimated Burst? (2006)
Schady, P., De Pasquale, M., Cummings, J., Page, M. J., Pandey, S. B., Wang, X. Y., ...
%auto-ignore This paper has been withdrawn by the authors due to dublicate submission. To download the paper please go to astro-ph/0611081
GRB 051028: an intrinsically faint GRB at high redshift? (2006)
Castro-Tirado, A. J., Jelinek, M., Pandey, S. B., McBreen, S., De Jong, J., Sahu, D. K., ...
We present multiwavelength observations of the gamma-ray burst GRB 051028 detected by HETE-2 in order to derive its afterglow emission parameters and to determine the reason for its optical faintness...
Multi-wavelength afterglow observations of the high redshift GRB 050730 (2006)
Pandey, S. B., Castro-Tirado, A. J., McBreen, S., Perez-Ramirez, M. D., Bremer, M., Guerrero, M. A., ...
GRB 050730 is a long duration high-redshift burst (z=3.967) discovered by Swift. The afterglow shows variability and is well monitored over a wide wavelength range. We present comprehensive temporal...
GRB 060121: Implications of a Short/Intermediate Duration Gamma-Ray Burst at High Redshift (2006)
Postigo, A. De Ugarte, Castro-Tirado, A. J., Guziy, S., Gorosabel, J., Johannesson, G., Aloy, M. A., ...
Since the discovery of the first short-hard gamma-ray burst afterglows in 2005, the handful of observed events have been found to be embedded in nearby (z < 1), bright underlying galaxies. We present...
Physics of the GRB 030328 afterglow and its environment (2006)
Maiorano, E., Masetti, N., Palazzi, E., Savaglio, S., Rol, E., Vreeswijk, P. M., ...
We report on the photometric, spectroscopic and polarimetric, monitoring of the optical afterglow of Gamma-Ray Burst (GRB) 030328 detected by HETE-2. Photometry, collected at 7 different telescopes,...
The broadband afterglow of GRB 030328 (2006)
Maiorano, E., Masetti, N., Palazzi, E., Savaglio, S., Rol, E., Pian, E., ...
We here report on the photometric, spectroscopic and polarimetric monitoring of the optical afterglow of the Gamma-Ray Burst (GRB) 030328 detected by HETE-2. We found that a smoothly broken power-law...
GRB 060121: implications of a short-/intermediate-duration γ-ray burst at high redshift (2006)
Castro-Tirado, A. J., Guziy, S., Gorosabel, J., Johannesson, G., Aloy, M. A., ...
GRB 060121: implications of a short-/intermediate-duration γ-ray burst at high redshift (2006)
Castro-Tirado, A. J., Guziy, S., Gorosabel, J., Johannesson, G., Aloy, M. A., ...
Multi-wavelength afterglow observations of the high redshift GRB 050730 (2006)
Pandey, S. B., Castro-Tirado, A. J., McBreen, S., Pérez-Ramírez, M. D., Bremer, M., Guerrero, M. A., ...
GRB 051028: An intrinsically faint gamma-ray burst at high redshift? (2006)
Castro-Tirado, A. J., Jelínek, M., Pandey, S. B., McBreen, S., De Jong, J., Sahu, D. K., ...
GRB 051028: an intrinsically faint gamma-ray burst at high redshift? (2006)
Castro-Tirado, A. J., Jelínek, M., Pandey, S. B., McBreen, S., De Jong, J., Sahu, D. K., ...
Aims.We present multiwavelength observations of the gamma-ray burst GRB 051028 detected by HETE-2 in order to derive its afterglow emission parameters and to determine the reason for its optical...
GRB 061006: Swift detection of a burst (2006)
Schady, P., Burrows, D.N., Cummings, J.R., Gehrels, N., Guidorzi, C., Holland, S.T., ...
Not Available
GRB 061214(?): Swift detection of a possible burst (2006)
Pandey, S.B., Barthelmy, S.D., Beardmore, A.P., Burrows, D.N., Chester, M.M., Evans, P.A., ...
Not Available
GRB 061021: Swift detection of a burst (2006)
Moretti, A., Barthelmy, S.D., Gehrels, N., Guidorzi, C., Holland, S.T., Kennea, J.A., ...
Not Available
GRB 061201: Swift detection of a short hard burst (2006)
Marshall, F.E., Barthelmy, S.D., Beardmore, A.P., Godet, O., Holland, S.T., Kennea, J.A., ...
Not Available
Misra, K, Resmi, L, Pandey, S. B, Bhattacharya, D, Sagar, R
We present the CCD Cousins R band photometric observations of the afterglow of GRB 041006. The multiband afterglow evolution is modelled using an underlying `hard' electron energy spectrum with a p1...
Misra, Kuntal, Resmi, L., Pandey, S. B., Bhattacharya, D., Sagar, R.
We present the CCD Cousins R band photometric observations of the afterglow of GRB 041006. The multiband afterglow evolution is modelled using an underlying `hard' electron energy spectrum with a...
Optical afterglow observations of GRB 021004 and GRB 030226 (2005)
Pandey, S.B., Sagar, R., Bhattacharya, D.
Paper presented at the AIP conference held at Torun, Poland, during 20-24 June 2005. Ed. by Tomasz Bulik et al.
Optical afterglow observations of GRB 021004 and GRB 030226 (2005)
Pandey, S.B., Sagar, R., Bhattacharya, D.
Open Access. Paper presented at the AIP conference on "Astrophysical sources of high energy particles and radiation" edited by T. Bulik et al.
Resmi, L., Ishwara-Chandra, C. H., Castro-Tirado, A. J., Bhattacharya, D., Rao, A. P., Bremer, M., ...
We present radio, millimeter and optical observations of the afterglow of GRB030329. UBVR_{C}I_{C} photometry is presented for a period of 3 hours to 34 days after the burst. Radio monitoring at 1280...
Misra, Kuntal, Resmi, L., Pandey, S.B., Bhattacharya, D., Sagar, R.
We present the CCD Cousins R band photometric observations of the afterglow of GRB 041006. The multiband afterglow evolution is modelled using an underlying `hard' electron energy spectrum with a...
Early optical and millimeter observations of GRB 030226 afterglow (2004)
Pandey, S.B., Sagar, R., Anupama, G.C., Bhattacharya, D., Sahu, D.K., Castro-Tirado, A.J., ...
The CCD magnitudes in Johnson UBV and Cousins RI photometric passbands for the afterglow of the long duration GRB 030226 are presented. Upper limits of a few mJy to millimeter wave emission at the...
Early optical and millimeter observations of GRB 030226 afterglow (2004)
Pandey, S. B, Sagar, R, Anupama, G. C, Bhattacharya, D, Sahu, D. K, Castro-Tirado, A. J, ...
The CCD magnitudes in Johnson UBV and Cousins RI photometric passbands for the afterglow of the long duration GRB 030226 are presented. Upper limits of a few mJy to millimeter wave emission at the...
Early optical and millimeter observations of GRB 030226 afterglow (2003)
Pandey, S. B., Sagar, R., Anupama, G. C., Bhattacharya, D., Sahu, D. K., Castro-Tirado, A. J., ...
The CCD magnitudes in Johnson $UBV$ and Cousins $RI$ photometric passbands for the afterglow of the long duration GRB 030226 are presented. Upper limits of a few mJy to millimeter wave emission at...
GRB 030227: the first multiwavelength afterglow of an INTEGRAL GRB (2003)
Castro-Tirado, A. J., Gorosabel, J., Guziy, S., Reverte, D., Cerón, J. M. Castro, Postigo, A. De Ugarte, ...
We present multiwavelength observations of a gamma-ray burst detected by INTEGRAL (GRB 030227) between 5.3 hours and ~1.7 days after the event. Here we report the discovery of a dim optical afterglow...
The optical afterglow of the not so dark GRB 021211 (2003)
Pandey, S.B., Anupama, G.C., Sagar, R., Bhattacharya, D., Castro-Tirado, A.J., Sahu, D.K., ...
We determine Johnson B,V and Cousins R,I photometric CCD magnitudes for the afterglow of GRB 021211 during the first night after the GRB trigger. The afterglow was very faint and would have been...
The afterglow and the host galaxy of GRB 011211 (2003)
Jakobsson, P., Hjorth, J., Fynbo, J. P. U., Gorosabel, J., Pedersen, K., Burud, I., ...
We present optical, near-infrared, and X-ray observations of the optical afterglow (OA) of the X-ray rich, long-duration gamma-ray burst GRB 011211. Hubble Space Telescope (HST) data obtained 14, 26,...
Optical afterglow of the not so dark GRB 021211 (2003)
Pandey, S. B., Anupama, G. C., Sagar, R., Bhattacharya, D., Castro-Tirado, A. J., Sahu, D. K., ...
We determine Johnson $B,V$ and Cousins $R,I$ photometric CCD magnitudes for the afterglow of GRB 021211 during the first night after the GRB trigger. The afterglow was very faint and would have been...
SN 2002ap, the hypernova of class Ic (2003)
Pandey, S. B., Sahu, D. K., Anupama, G. C., Bhattacharya, D., Sagar, Ram
The supernova SN 2002ap was discovered in the outer regions of the nearby spiral M74 on January 29.4 UT. Early photometric and spectroscopic observations indicate the supernova belongs to the class...
A flattening in the optical light curve of SN 2002ap (2003)
Pandey, S.B., Anupama, G.C., Sagar, R., Bhattacharya, D., Sahu, D.K., Pandey, J.C.
Restricted Access. An open access version is available at NASA ADS (alternative location).
Optical and near-infrared observations of the GRB020405 afterglow (2003)
Masetti, N., Palazzi, E., Pian, E., Simoncelli, A., Hunt, L. K., Maiorano, E., ...
(Abridged) We report on observations of the optical and NIR afterglow of GRB020405. Ground-based optical observations started about 1 day after the GRB and spanned a period of ~10 days; archival HST...
GRB 030227 : The first multiwavelength afterglow of an INTEGRAL GRB (2003)
Castro-Tirado, A. J., Gorosabel, J., Guziy, S., Reverte, D., Castro Cerón, J. M., ...
We present multiwavelength observations of a gamma-ray burst detected byINTEGRAL (GRB 030227) between 5.3 hours and ~ 1.7days after the event. Here we report the discovery of a dim opticalafterglow...
Optical and near-infrared observations of the GRB020405 afterglow (2003)
Masetti, N., Palazzi, E., Pian, E., Simoncelli, A., Hunt, L.K., Maiorano, E., ...
We report on photometric, spectroscopic and polarimetric monitoring of the optical and near-infrared (NIR) afterglow of GRB020405. Ground-based optical observations, performed with 8 different...
GRB 030227: The first multiwavelength afterglow of an INTEGRAL GRB (2003)
Castro-Tirado, A.J., Gorosabel, J., Guziy, S., Reverte, D., Castro Ceron, J.M., Ugarte Postigo, A. De, ...
We present multiwavelength observations of a gamma-ray burst detected by INTEGRAL (GRB 030227) between 5.3 hours and ~ 1.7 days after the event. Here we report the discovery of a dim optical...
Optical observations of the bright long duration peculiar GRB 021004 afterglow (2003)
Pandey, S.B., Sahu, D.K., Resmi, L., Sagar, R., Anupama, G.C., Bhattacharya, D., ...
The CCD magnitudes in Johnson $B,V$ and Cousins $R$ and $I$ photometric passbands are determined for the bright long duration GRB 021004 afterglow from 2002 October 4 to 16 starting $\sim$ 3 hours...
SN 2002ap, the hypernova of class Ic (2003)
Pandey, S.B., Sahu, D.K., Anupama, G.C., Bhattacharya, D., Sagar, R.
The supernova SN 2002ap was discovered in the outer regions of the nearby spiral M74 on January 29.4 UT. Early photometric and spectroscopic observations indicate the supernova belongs to the class...
A Flattening in the Optical Light Curve of SN 2002ap (2003)
Pandey, S. B, Anupama, G. C, Sagar, R, Bhattacharya, D, Sahu, D. K, Pandey, J. C
The optical afterglow of the not so dark GRB 021211 (2003)
Pandey, S. B, Anupama, G. C, Sagar, R, Bhattacharya, D, Castro-Tirado, A. J, Sahu, D. K, ...
We determine Johnson B,V and Cousins R,I photometric CCD magnitudes for the afterglow of GRB 021211 during the first night after the GRB trigger. The afterglow was very faint and would have been...
GRB 030227 : The first multiwavelength afterglow of an INTEGRAL GRB (2003)
Castro-Tirado, A. J., Gorosabel, J., Guziy, S., Reverte, D., Castro Cerón, J. M., ...
Optical and near-infrared observations of the GRB020405 afterglow (2003)
Masetti, N., Palazzi, E., Pian, E., Simoncelli, A., Hunt, L. K., Maiorano, E., ...
The afterglow and the host galaxy of GRB 011211 (2003)
Jakobsson, P., Hjorth, J., Fynbo, J., Gorosabel, J., Pedersen, K., Burud, I., ...
SN 2002ap, the Hypernova of Class Ic (2003)
Pandey, S. B, Sahu, D. K, Anupama, G. C, Bhattacharya, D, Sagar, R
The supernova SN 2002ap was discovered in the outer regions of the nearby spiral M74 on January 29.4 UT. Early photometric and spectroscopic observations indicate the supernova belongs to the class...
Optical observations of the bright long duration peculiar GRB 021004 afterglow (2002)
Pandey, S. B., Sahu, D. K., Resmi, L., Sagar, R., Anupama, G. C., Bhattacharya, D., ...
The CCD magnitudes in Johnson $B,V$ and Cousins $R$ and $I$ photometric passbands are determined for the bright long duration GRB 021004 afterglow from 2002 October 4 to 16 starting $\sim$ 3 hours...
A flattening in the Optical Light Curve of SN 2002ap (2002)
Pandey, S. B., Anupama, G. C., Sagar, R., Bhattacharya, D., Sahu, D. K., Pandey, J. C.
We present the $UBVR_cI_c$ broad band optical photometry of the Type Ic supernova SN 2002ap obtained during 2002 February 06 -- March 23 in the early decline phases and also later on 2002 15 August....
Optical follow-up of GRB afterglows from UPSO, Naini Tal (2001)
Pandey, S.B., Sagar, R., Mohan, V., Pandey, A.K., Bhattacharya, D., Castro-Tirado, A.J.
Successful optical photometric observations of five GRB afterglows namely GRB 990123, GRB 991208, GRB 991216, GRB 000301c and GRB 000926 have been carried out from State Observatory Naini Tal till...
Sagar, R., Stalin, C.S., Bhattacharya, D., Pandey, S.B., Mohan, V., Castro-Tirado, A.J., ...
We report photometric observations of the optical afterglow of GRB 010222 in V, R and I passbands carried out between 22-27 February 2001 at Nainital. We determine the CCD Johnson BV and Cousins RI...