The Chinese-French SVOM Mission: studying the brightest astronomical explosions

We present the SVOM mission that the Chinese National Space Agency and the French Space Agency have decided to jointly implement. SVOM has been designed to detect, characterise and quickly localise gamma-ray bursts (GRBs) and other types of high-energy transients. For this task the spacecraft will carry two widefield high-energy instruments: ECLAIRs, a hard X-ray imager, and the Gamma-Ray Monitor, a broadband spectrometer. Upon localising a transient, SVOM will quickly slew towards the source and start deep followup observations with two narrow-field telescopes: the Micro-channel X-ray Telescope in X-rays and the Visible Telescope in the visible. The nearly anti-solar pointing of SVOM combined with the fast transmission of GRB positions to the ground in less than 1 minute, will facilitate the observations of SVOM transients by the largest ground based telescopes.

[1]  P. Giommi,et al.  The Early X-Ray Emission from GRBs , 2006 .

[2]  P. Giommi,et al.  An unexpectedly rapid decline in the X-ray afterglow emission of long γ-ray bursts , 2005, Nature.

[3]  M. Livio,et al.  Nucleosynthesis, neutrino bursts and γ-rays from coalescing neutron stars , 1989, Nature.

[4]  Alan A. Wells,et al.  The Swift X‐Ray Telescope , 2003 .

[5]  A. Gomboc,et al.  On the environment of short gamma-ray bursts , 2012, 1203.1864.

[6]  O. Limousin,et al.  IDeF-X ECLAIRs: An ultra low noise CMOS ASIC for the readout of Cd(Zn)Te detectors , 2007, 2007 IEEE Nuclear Science Symposium Conference Record.

[7]  P. Brown,et al.  The association of GRB 060218 with a supernova and the evolution of the shock wave , 2006, Nature.

[8]  O. Godet,et al.  Afterglows after Swift , 2011, 1205.6357.

[9]  Remoue Nadege,et al.  Extensive testing of Schottky CdTe detectors for the ECLAIRs X-Gamma-ray Camera on board the SVOM mission , 2010 .

[10]  P. Giommi,et al.  A short γ-ray burst apparently associated with an elliptical galaxy at redshift z = 0.225 , 2005, Nature.

[11]  E. Ramirez-Ruiz,et al.  Gamma-Ray Bursts in the Swift Era , 2009, 0909.1531.

[12]  P. Schady,et al.  The nature of "dark" gamma-ray bursts , 2010, 1011.0618.

[13]  M. C. Begam,et al.  An unusual supernova in the error box of the γ-ray burst of 25 April 1998 , 1998, Nature.

[14]  N. Gehrels,et al.  Evidence for a Canonical Gamma-Ray Burst Afterglow Light Curve in the Swift XRT Data , 2005, astro-ph/0508332.

[15]  A. MacFadyen,et al.  Collapsars: Gamma-Ray Bursts and Explosions in “Failed Supernovae” , 1998, astro-ph/9810274.

[16]  A. J. Levan,et al.  THE AFTERGLOWS OF SWIFT-ERA GAMMA-RAY BURSTS. I. COMPARING PRE-SWIFT AND SWIFT-ERA LONG/SOFT (TYPE II) GRB OPTICAL AFTERGLOWS , 2007, 0712.2186.

[17]  Stephane Schanne The ECLAIRs telescope onboard the SVOM mission for gamma-ray burst studies , 2008 .

[18]  C. Kouveliotou,et al.  Identification of two classes of gamma-ray bursts , 1993 .

[19]  Nathaniel R. Butler,et al.  THE COSMIC RATE, LUMINOSITY FUNCTION, AND INTRINSIC CORRELATIONS OF LONG GAMMA-RAY BURSTS , 2009, 0910.3341.

[20]  Evert Rol,et al.  A γ-ray burst at a redshift of z ≈ 8.2 , 2009, Nature.

[21]  O. Godet,et al.  Monte-Carlo simulations of the background of the coded-mask camera for X- and Gamma-rays on-board the Chinese-French GRB mission SVOM , 2009, 0902.1118.

[22]  M. Was Gravitational Waves and Gamma-Ray Bursts , 2014 .

[23]  J. Deng,et al.  A fast onboard star-extraction algorithm optimized for the SVOM Visible Telescope , 2009, 0907.1330.

[24]  E. Berger,et al.  The Environments of Short-Duration Gamma-Ray Bursts and Implications for their Progenitors , 2010, 1005.1068.

[25]  Goro Sato,et al.  The Burst Alert Telescope (BAT) on the SWIFT Midex Mission , 2004 .

[26]  Alan A. Wells,et al.  The Swift Gamma-Ray Burst Mission , 2004, astro-ph/0405233.

[27]  Melvyn B. Davies,et al.  Implications for the origin of short gamma-ray bursts from their observed positions around their host galaxies , 2011, 1101.1088.

[28]  BoBing Wu,et al.  SVOM gamma ray monitor , 2009 .

[29]  J. P. Osborne,et al.  Methods and results of an automatic analysis of a complete sample of Swift-XRT observations of GRBs , 2008, 0812.3662.

[30]  Carl W. Akerlof,et al.  An Estimation of the Gamma-Ray Burst Afterglow Apparent Optical Brightness Distribution Function , 2007, 0709.0962.

[31]  P. Giommi,et al.  The First Survey of X-Ray Flares from Gamma-Ray Bursts Observed by Swift: Temporal Properties and Morphology , 2007 .

[32]  Keith O. Mason,et al.  The Swift Ultra-Violet/Optical Telescope , 2002 .

[33]  P. Giommi,et al.  An origin for short γ-ray bursts unassociated with current star formation , 2005, Nature.