The strange case of SN 2011ja and its host

Sayan Chakraborti, Alak Ray, Randall Smith, Stuart Ryder, Naveen Yadav, Firoza Sutaria, Vikram V. Dwarkadas, Poonam Chandra, David Pooley, Rupak Roy

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review


SN 2001ja was observed twice in three months using the Chandra X-Ray Observatory. The X-ray flux could be due to interaction with the circumstellar medium, perhaps dominated by the reverse shock heated thermal plasma, or from inverse Compton scattering at the forward shock. In both cases, for a steady wind-like circumstellar density profile, the X-ray flux is expected to fall off as a power law or faster. But the flux from the position of SN 2011ja, increased by a factor of three between these observations. In this presentation, we investigated possible reasons, including contamination from other astrophysical sources such as a X-Ray Binary, within the Chandra's resolution, in the host galaxy using our observations, modelling and pre-explosion Chandra/XMM data.

Original languageEnglish
Title of host publicationSupernova Environmental Impacts
Subtitle of host publicationproceedings of the 296th symposium of the International Astronomical Union held at Raichak on Ganges near Calcutta, India January 7-11, 2013
EditorsAlak Ray, Richard McCray
Place of PublicationCambridge
PublisherCambridge University Press (CUP)
Number of pages2
ISBN (Print)9781107044777
Publication statusPublished - 27 Mar 2014
Externally publishedYes
Event296th symposium of the International Astronomical Union - Raichak on Ganges, India
Duration: 7 Jan 201311 Jan 2013

Publication series

Name IAU symposium
ISSN (Print)1743-9213


Conference296th symposium of the International Astronomical Union
CityRaichak on Ganges


  • circumstellar matter
  • radio continuum: general
  • shock waves
  • Stars: Mass Loss
  • Supernovae: Individual: SN 2011ja
  • X-rays: general


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