1ES0657-56 "Bullet Cluster"    

• Right Ascension: 06 58 31
• Declination: −55 56 49
• Redshift: 0.2965

References:

• Calculations of expected SZ effect from Dark Matter annihilation in the main mass concentrations of the cluster 1ES0657-556. Colafrancesco et al. 2007, A&A, 467, L1. "Direct probes of dark matter in the cluster 1ES0657-556 through microwave observations" ADS
• Strong and weak lensing mass reconstruction. Bradac et al. 2006, ApJ, 652, 937. "Strong and Weak Lensing United. III. Measuring the Mass Distribution of the Merging Galaxy Cluster 1ES 0657-558" ADS
• Positional offsets between X-ray gas and weak lensing mass peaks. Clowe et al. 2006, ApJ, 648, L109. "A Direct Empirical Proof of the Existence of Dark Matter" ADS
• Chandra observations of a bow shock propagating in front of a bullet-like gas cloud just exiting the disrupted cluster core (see figure above). Markevitch et al. 2002, ApJ, 567, L27. "A Textbook Example of a Bow Shock in the Merging Galaxy Cluster 1E 0657-56" ADS
• Identification of extended IPC X-ray source with a new galaxy cluster at z=0.296 with velocity dispersion 1213^{+352}_{-191} km/s and mean temperature from ASCA of kT=17.4+/-2.5 keV. Tucker et al. 1998, ApJ, 496, 5. "1E 0657-56: A Contender for the Hottest Known Cluster of Galaxies" ADS

Last updated: 1 June 2007