Sunspot groups at high latitude

HIGH LATITUDE GAMMA RAYS ASSOCIATED WITH VIRGO

A more detailed analysis is made of the energy spectrum of the diffuse component of extragalactic gamma rays over the range of 0.3- 10 GeV, obtained fromthe EGRET instrument at the Compton Gamma Ray Observatory. The derived excess energy spectrum of high galactic latitude, b > 60°, using intercept method shows that it is correlated with Virgo cluster (over lsr) and average Virgo intensity i...

Synchrotron Polarization at High Galactic Latitude

We present preliminary results from mapping the high-latitude Galactic polarization with the Effelsberg Telescope at λ21 cm. Structures on the resulting maps are mostly on the scale of several degrees. The results show detection of polarization over most of the field, at the level of tens of percent of the synchrotron emission. The evidence of more structure in Stokes Q and U rather than in √ Q...

On the size distribution of sunspot groups in the Greenwich sunspot record 1874 - 1976

We investigate the size distribution of the maximum areas and the instantaneous distribution of areas of sunspot groups using the Greenwich sunspot group record spanning the interval 1874-1976. Both distributions are found to be well described by log-normal functions. Using a simple model we can transform the maximum area distribution into the instantaneous area distribution if the sunspot area...

Taylor and Ferrari: Blooms at High Latitude Fronts

Discovery of an Isolated Compact Object at High Galactic Latitude

We report discovery of Calvera, a compact object at high Galactic latitude. We initially identified Calvera as a ROSAT All-Sky Survey Bright Source Catalog X-ray source, 1RXS J141256.0+792204, statistically likely to possess a high X-ray to optical flux ratio. Further observations using Swift, GeminiNorth, and the Chandra X-ray Observatory refined the source position and confirmed the absence o...