Quantcast
Last updated on April 19, 2014 at 18:42 EDT
The flux decline of the Crab Nebula
21 of 236

The flux decline of the Crab Nebula

January 8, 2013
This graph shows the light curve of the Crab Nebula over a time interval of over 10 years, from 1999 to 2010. The data shown in the plot were gathered by NASA's Fermi Gamma-Ray Burst Monitor (Fermi/GBM), Swift Burst Alert Telescope (Swift/BAT), and Rossi X-ray Timing Explorer Proportional Counter Array (RXTE/PCA) as well as two instruments on board ESA's INTEGRAL observatory: the Imager on Board the INTEGRAL Satellite (IBIS) and the Joint European X-Ray Monitor (JEM-X), respectively. The most interesting part of the figure is at the far right where measurements from all instruments show that the flux of the Crab Nebula is declining, with a current value that is significantly lower than the previous minima observed periodically in the past (left and central part of the graph). Date: 12 Jan 2011 Satellite: Fermi, Swift, Rossi, INTEGRAL Depicts: Flux Emission from Crab Nebula Copyright: From Wilson-Hodge et al., ApJL, 20XX