Picture of the Month, November 2001

Image  produced from data taken with the SPI flight model during the science 
calibration.  It is based on exposures of a 
radioactive 60Co source at 125m distance (~ parallel beam), selecting the  1173 keV line.  
The data were combined in such a way as to emulate a `dithering' observation 
of two sources separated by 2 degrees. 
The image was generated with the Maximum Entropy method using the software at 
the ISDC.  It demonstrates that SPI is capable of resolving sources to better than 2 degrees.
                                             [A. Strong, SPI team, MPE Garching]