A new measurement of the cosmic X-ray background (2008)
Moretti, A., Pagani, C., Cusumano, G., Campana, S., Perri, M., Abbey, A., ...
We present a new measurement of the cosmic X-ray background (CXRB) in the 1.5-7 keV energy band, performed by exploiting the Swift X-ray telescope (XRT) data archive. We also present a CXRB spectral...
Sidoli, L., Romano, P., Cusumano, G., Mangano, V., Vercellone, S., Paizis, A., ...
Supergiant Fast X-ray Transients (SFXTs) are a sub-class of High Mass X-ray Binaries (HMXBs) associated with OB supergiant companions and displaying transient X-ray activity. This behaviour is quite...
The Gamma--Ray Burst catalog obtained with the Gamma Ray Burst Monitor aboard BeppoSAX (2008)
Frontera, F., Guidorzi, C., Montanari, E., Rossi, F., Costa, E., Feroci, M., ...
We report on the catalog of Gamma--Ray Bursts (GRBs) detected with the Gamma Ray Burst Monitor aboard the BeppoSAX satellite. It includes 1082 GRBs with 40--700 keV fluences in the range from...
Flares in Gamma Ray Bursts (II) (2008)
Chincarini, G., Margutti, R., Mao, J., Pasotti, F., Guidorzi, C., Covino, S., ...
We illustrate some of the preliminary results obtained with a new sample of flares and a new analysis. In these proceedings we deal mainly with the analysis related to the flare energy and describe...
Temporal variability of GRB early X-ray afterglows and GRB080319B prompt emission (2008)
Margutti, R., Guidorzi, C., Chincarini, G., Pasotti, F., Covino, S., Mao, J.
We performed the first systematic search for the minimum variability time scale between 0.3 and 10 keV studying the 28 brightest early (
The Luminosity Function of Long Gamma-Ray Bursts and their rate at z>6 (2008)
Salvaterra, R., Campana, S., Chincarini, G., Choudhury, T. R., Covino, S., Ferrara, A., ...
We compute the luminosity function (LF) and the formation rate of long gamma ray bursts (GRBs) in three different scenarios: i) GRBs follow the cosmic star formation and their LF is constant in time;...
The short GRB070707 afterglow and its very faint host galaxy (2008)
Piranomonte, S., D'Avanzo, P., Covino, S., Antonelli, L. A., Beardmore, A. P., Campana, S., ...
We present the results from an ESO/VLT campaign aimed at studying the afterglow properties of the short/hard gamma ray burst GRB 070707. Observations were carried out at ten different epochs from...
Romano, P., Guidorzi, C., Sidoli, L., Montanari, E., Capitanio, F., Amati, L., ...
During our Swift/XRT program to obtain X-ray positions at arcsecond level for a sample of Galactic X-ray binaries, we discovered that SAX J0840.7+2248 is not a binary, but rather BeppoSAX/WFC+GRBM...
Outliers from the mainstream: how a massive star can produce a gamma-ray burst (2008)
Campana, S., Panagia, N., Lazzati, D., Beardmore, A. P., Cusumano, G., Godet, O., ...
It is now recognized that long-duration Gamma-Ray Bursts (GRBs) are linked to the collapse of massive stars, based on the association between (low-redshift) GRBs and (type Ic) core-collapse...
Evidence for Luminosity Evolution of Long Gamma-ray Bursts in Swift Data (2008)
Salvaterra, R., Guidorzi, C., Campana, S., Chincarini, G., Tagliaferri, G.
We compute the luminosity function (LF) and the formation rate of long gamma ray bursts (GRBs) by fitting the observed differential peak flux distribution obtained by the BATSE satellite in two...
A Swift gaze into the 2006 March 29th burst forest of SGR 1900+14 (2008)
Israel, G. L., Romano, P., Mangano, V., Dall'Osso, S., Chincarini, G., Stella, L., ...
We report on the intense burst ``forest'' recorded on 2006 March 29 which lasted for ~30s. More than 40 bursts were detected both by BAT and by XRT, seven of which are rare intermediate flares (IFs):...
GRB 080319B: A Naked-Eye Stellar Blast from the Distant Universe (2008)
Racusin, J. L., Karpov, S. V., Sokolowski, M., Granot, J., Wu, X. F., Pal'shin, V., ...
Long duration gamma-ray bursts (GRBs) release copious amounts of energy across the entire electromagnetic spectrum, and so provide a window into the process of black hole formation from the collapse...
Measuring the cosmological parameters with the Ep,i-Eiso correlation of Gamma-Ray Bursts (2008)
Amati, L., Guidorzi, C., Frontera, F., Della Valle, M., Finelli, F., Landi, R., ...
We have used the Ep,i-Eiso correlation of GRBs to measure the cosmological parameter Omega_M. By adopting a maximum likelihood approach which allows us to correctly quantify the extrinsic (i.e....
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 prompt, high resolution spectroscopic view of the "naked-eye" GRB080319B (2008)
D'Elia, V., Fiore, F., Perna, R., Krongold, Y., Covino, S., Fugazza, D., ...
GRB080319B reached 5th optical magnitude during the burst prompt emission. Thanks to the VLT/UVES rapid response mode, we observed its afterglow just 8m:30s after the GRB onset when the magnitude was...
Gomboc, A., Kobayashi, S., Guidorzi, C., Melandri, A., Mangano, V., Sbarufatti, B., ...
We present a detailed study of the prompt and afterglow emission from Swift GRB 061126 using BAT, XRT, UVOT data and multi-color optical imaging from ten ground-based telescopes. GRB 061126 was a...
The Early-time Optical Properties of Gamma-Ray Burst Afterglows (2008)
Melandri, A., Mundell, C. G., Kobayashi, S., Guidorzi, C., Gomboc, A., Steele, I. A., ...
We present a multiwavelength analysis of 63 Gamma-Ray Bursts observed with the world's three largest robotic optical telescopes, the Liverpool and Faulkes Telescopes (North and South). Optical...
Rossi, F., Guidorzi, C., Amati, L., Frontera, F., Romano, P., Campana, S., ...
Using a sample of 14 BeppoSAX and 74 Swift GRBs with measured redshift we tested the correlation between the intrinsic peak energy of the time-integrated spectrum, E_p,i, the isotropic-equivalent...
Anomalous X-ray emission in GRB 060904B: a nickel line? (2008)
Margutti, R., Moretti, A., Pasotti, F., Campana, S., Chincarini, G., Covino, S., ...
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., ...
Anomalous X-Ray emission in GRB060904B: a Nickel line? (2007)
Margutti, R., Moretti, A., Pasotti, F., Campana, S., Chincarini, G., Covino, S., ...
The detection of an extra component in GRB060904B X-ray spectra in addition to the standard single power-law behaviour has recently been reported in the literature. This component can be fit with...
When GRB afterglows get softer, hard components come into play (2007)
Moretti, A., Margutti, R., Pasotti, F., Beardmore, A. P., Campana, S., Chincarini, G., ...
We aim to investigate the ability of simple spectral models to describe the GRB early afterglow emission. We performed a time resolved spectral analysis of a bright GRB sample detected by the Swift...
Short Gamma Ray Bursts: a bimodal origin? (2007)
Salvaterra, R., Cerutti, A., Chincarini, G., Colpi, M., Guidorzi, C., Romano, P.
Short-hard Gamma Ray Bursts (SGRBs) are currently thought to arise from gravitational wave driven coalescences of double neutron star systems forming either in the field or dynamically in globular...
A study of the prompt and afterglow emission of the Short GRB 061201 (2007)
Stratta, G., D'Avanzo, P., Piranomonte, S., Cutini, S., Preger, B., Perri, M., ...
Our knowledge of the intrinsic properties of short duration Gamma-Ray Bursts has relied, so far, only upon a few cases for which the estimate of the distance and an extended, multiwavelength...
GRB 070311: a direct link between the prompt emission and the afterglow (2007)
Guidorzi, C., Vergani, S. D., Sazonov, S., Covino, S., Malesani, D., Molkov, S., ...
We present prompt gamma-ray, early NIR/optical, late optical and X-ray observations of the peculiar GRB 070311 discovered by INTEGRAL, in order to gain clues on the mechanisms responsible for the...
Multicolor observations of the afterglow of the short/hard GRB 050724 (2007)
Malesani, D., Covino, S., D'Avanzo, P., D'Elia, V., Fugazza, D., Piranomonte, S., ...
New information on short/hard gamma-ray bursts (GRBs) is being gathered thanks to the discovery of their optical and X-ray afterglows. However, some key aspects are still poorly understood, including...
Ruiz-Velasco, A. E., Swan, H., Troja, E., Malesani, D., Fynbo, J. P. U., Starling, R. L. C., ...
We report on follow-up observations of the GRB 060927 using the ROTSE-IIIa telescope and a suite of larger aperture ground-based telescopes. An optical afterglow was detected 20 s after the burst,...
Multicolor observations of the afterglow of the short/hard GRB 050724 (2007)
Malesani, D., Covino, S., D'Avanzo, P., D'Elia, V., Fugazza, D., Piranomonte, S., ...
New information on short/hard gamma-ray bursts (GRBs) is being gathered thanks to the discovery of their optical and X-ray afterglows. However, some key aspects are still poorly understood, including...
Rizzuto, D., Guidorzi, C., Romano, P., Covino, S., Campana, S., Capalbi, M., ...
We test the gamma-ray burst correlation between temporal variability and peak luminosity of the $\gamma$-ray profile on a homogeneous sample of 36 Swift/BAT GRBs with firm redshift determination....
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...
Page, K. L., Willingale, R., Osborne, J. P., Zhang, B., Godet, O., Marshall, F. E., ...
Swift triggered on a precursor to the main burst of GRB 061121 (z=1.314), allowing observations to be made from the optical to gamma-ray bands. Many other telescopes, including Konus-Wind,...
Are Swift gamma-ray bursts consistent with the Ghirlanda relation? (2007)
Campana, S., Guidorzi, C., Tagliaferri, G., Chincarini, G., Moretti, A., Rizzuto, D., ...
A few tight correlations linking several properties of gamma-ray bursts (GRBs), namely the spectral peak energy, the total radiated energy, and the afterglow break time, have been discovered with...
Chincarini, G., Moretti, A., Romano, P., Falcone, A. D., Morris, D., Racusin, J., ...
We present the first systematic investigation of the morphological and timing properties of flares in GRBs observed by Swift/XRT. We consider a large sample drawn from all GRBs detected by Swift,...
Troja, E., Cusumano, G., O'Brien, P., Zhang, B., Sbarufatti, B., Mangano, V., ...
We present a detailed analysis of Swift multi-wavelength observations of GRB 070110 and its remarkable afterglow. The early X-ray light curve, interpreted as the tail of the prompt emission, displays...
On the temporal variability classes found in long gamma-ray bursts with known redshift (2007)
Borgonovo, L., Frontera, F., Guidorzi, C., Montanari, E., Vetere, L., Soffitta, P.
Based on the analysis of a small sample of BATSE and Konus gamma-ray bursts (GRBs) with know redshift it has been reported that the width of the autocorrelation function (ACF) shows a remarkable...
Swift GRBs: the early afterglow spectral energy distribution (2007)
Tagliaferri, G., Malesani, D., Vergani, S. D., Campana, S., Chincarini, G., Covino, S., ...
We present the first results of a program to systematically study the optical-to-X-ray spectral energy distribution (SED) of Swift GRB afterglows with known redshift. The goal is to study the...
Attributes of flares in Gamma Ray Bursts: sample I (2007)
Chincarini, G., Moretti, A., Romano, P., Falcone, A. D., Campana, S., Covino, S., ...
We discuss some of the preliminary results and findings derived from the analysis of a first sample of flares detected by the XRT on board Swift. The analysis shows that the morphology of flares is...
The prompt to late-time multiwavelength analysis of GRB 060210 (2007)
Curran, P. A., Van Der Horst, A. J., Beardmore, A. P., Page, K. L., Rol, E., Melandri, A., ...
We present our analysis of the multiwavelength photometric & spectroscopic observations of GRB 060210 and discuss the results in the overall context of current GRB models. All available optical data...
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
GRB 070311: a direct link between the prompt emission and the afterglow (2007)
Guidorzi, C., Vergani, S. D., Sazonov, S., Covino, S., Malesani, D., Molkov, S., ...
A Review of Early-Time Optical Follow-ups with 2-m Robotic Telescopes (2006)
Gomboc, A., Guidorzi, C., Mundell, C. G., Melandri, A., Monfardini, A., Bersier, D., ...
We summarise recent deep, rapid GRB follow-up observations using the RoboNet-1.0 network which comprises three fully-robotic 2-m telescopes, the Liverpool Telescope and the Faulkes Telescopes North...
Guidorzi, C., Gomboc, A., Kobayashi, S., Mundell, C. G., Rol, E., Bode, M. F., ...
We report a multi-wavelength analysis of the prompt emission and early afterglow of GRB051111 and discuss its properties in the context of current fireball models. The detection of GRB051111 by the...
The early and late-time spectral and temporal evolution of GRB 050716 (2006)
Rol, E., Osborne, J. P., Page, K. L., McGowan, K. E., Beardmore, A. P., O'Brien, P. T ., ...
We report on a comprehensive set of observations of Gamma Ray Burst 050716, detected by the Swift satellite and subsequently followed-up rapidly in X-ray, optical and near infra-red wavebands. The...
The Remarkable Afterglow of GRB 061007: Implications for Optical Flashes and GRB Fireballs (2006)
Mundell, C. G., Melandri, A., Guidorzi, C., Kobayashi, S., Steele, I. A., Malesani, D., ...
We present a multiwavelength analysis of Swift GRB 061007. The 2-m robotic Faulkes Telescope South (FTS) began observing 137 s after the onset of the gamma-ray emission, when the optical counterpart...
Anatomy of A Dark Burst - The Afterglow of GRB 060108 (2006)
Oates, S. R., Mundell, C. G., Piranomonte, S., Page, K. L., De Pasquale, M., Monfardini, A., ...
We report the first detection of an optical afterglow of a GRB (060108) that would have been classified as 'dark' in the absence of deep, rapid ground-based optical imaging with the 2-m robotic...
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...
On the consistency of the peculiar GRBs 060218 and 060614 with the Ep,i - Eiso correlation (2006)
Amati, L., Della Valle, M., Frontera, F., Malesani, D., Guidorzi, C., Montanari, E., ...
We analyze and discuss the position of GRB 060218 and GRB 060614 in the Ep,i - Eiso plane. GRB 060218 is important because of its similarity with GRB 980425, the proto-type event of the GRB-SN...
The slope of the GRB Variability/Peak Luminosity Correlation (2006)
Guidorzi, C., Frontera, F., Montanari, E., Rossi, F., Amati, L., Gomboc, A., ...
From a sample of 32 GRBs with known redshift (Guidorzi et al. 2005) and then a sample of 551 BATSE GRBs with derived pseudo-redshift (Guidorzi 2005), the time variability/peak luminosity correlation...
The gamma-ray burst monitor for Lobster-ISS (2006)
Amati, L., Frontera, F., Auricchio, N., Caroli, E., Basili, A., Bogliolo, A., ...
Lobster-ISS is an X-ray all-sky monitor experiment selected by ESA two years ago for a Phase A study (now almost completed) for a future flight (2009) aboard the Columbus Exposed Payload Facility of...
Monfardini, A., Kobayashi, S., Guidorzi, C., Carter, D., Mundell, C. G., Bersier, D. F., ...
The 2-m robotic Liverpool Telescope (LT) reacted promptly to the high-redshift (z=4.048) gamma-ray burst GRB 060206. The afterglow was identified automatically and multicolor r'i'z' imaging was...
The variable X-ray light curve of GRB 050713A: the case of refreshed shocks (2006)
Guetta, D., Fiore, F., D'Elia, V., Perna, R., Antonelli, L. A., Piranomonte, S., ...
We present a detailed study of the spectral and temporal properties of the X-ray and optical emission of GRB050713a up to 0.5 day after the main GRB event. The X-ray light curve exhibits large...
We test the correlation found by Reichart et al. between time variability and peak luminosity of gamma-ray bursts (GRBs). Recently, Guidorzi et al. found that this still holds for a sample of 32 GRBs...
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., ...
IGR J08408-4503 (= v* LM vel): Swift detection of a transient (2006)
Ziaeepour, H., Burrows, D.N., Campana, S., Cummings, J.R., Godet, O., Guidorzi, C., ...
Not Available
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