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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

42476 results found.

  1. GRB 120624B, Swift-BAT refined analysis
  2. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  3. Konus-Wind observation of GRB 120624B
  4. GRB 120624B: Swift detection of a burst
  5. GRB 120624A: Fermi GBM observation
  6. GRB 120624B: Fermi-LAT Detection
  7. Konus-Wind observation of GRB 120624A
  8. GRB 120624B: Fermi GBM detection
  9. Swift Trigger 524949: Noise fluctuation near a galaxy
  10. GRB 120622A: MAXI/GSC detection
  11. Swift trigger 524642 / SwJ1910.2-0546
  12. GRB 120602A: Suzaku WAM observation of the prompt emission
  13. Konus-Wind observation of GRB 120617A
  14. Swift Trigger 524642 is Swift J1910.2-0546
  15. Trigger 524584: Swift detection of Algol
  16. Swift triggers (#524542) on a Galactic source
  17. Konus-Wind observation of GRB 120602A
  18. GRB 120614A: MAXI/GSC detection of a burst
  19. GRB 120612A: optical observations
  20. GRB 120612A: Swift/UVOT observations
  21. GRB 120612A: Swift-XRT refined Analysis
  22. GRB 120612A: Swift-BAT refined analysis
  23. GRB 120612A: Enhanced Swift-XRT position
  24. GRB 120612A: BOOTES-3 optical upper limit
  25. GRB 120612A: Swift detection of a burst
  26. GRB 120603A: Suzaku WAM observation of the prompt emission
  27. Konus-Wind observation of GRB 120603A
  28. Konus-Wind observation of GRB 120528B
  29. GRB 120519A: Suzaku WAM observation of the prompt emission
  30. GRB 120528C: MAXI/GSC detection
  31. GRB 120521C redshift estimate
  32. GRB 120528B: MAXI/GSC detection
  33. GRB 120512A: Suzaku WAM observation of the prompt emission
  34. GRB 120521C: EVLA 22 GHz Detection
  35. GRB120521B: SSO 2.3m upper limits
  36. Konus-Wind observation of GRB 120522A
  37. GRB 120521B: Fermi GBM observation
  38. GRB 120521A: ATCA 34GHz upper limit
  39. GRB 120521C: Early Tautenburg limits
  40. GRB 120521C: EVLA 22 GHz Upper Limit
  41. GRB 120521A: GROND Upper limits
  42. GRB 120521C: Swift-XRT refined Analysis
  43. GRB 120521C: Swift-BAT refined analysis
  44. GRB 120521C: Keck Observations
  45. GRB 120521C: Swift/UVOT Upper Limits
  46. GRB 120521B: Swift/UVOT Upper Limits
  47. GRB 120521C: MASTER optical limit
  48. GRB 120521B: GROND Upper limits
  49. GRB 120521A: XRT light curve (Correction to GCN 13326)
  50. GRB 120521A: Swift-XRT refined Analysis
  51. GRB 120521C: PAIRITEL NIR Upper Limits
  52. GRB 120521C: Enhanced Swift-XRT position
  53. GRB 120521C: BOOTES-1 optical observations
  54. GRB 120521C: WHT optical observations
  55. GRB 120521C - NOT optical limits
  56. GRB120521C: Liverpool Telescope observations
  57. GRB 120521C: TAROT Calern observatory optical observations
  58. GRB 120521C: Swift detection of a burst
  59. GRB 120521B: Swift-BAT refined analysis
  60. GRB 120521B: Swift-XRT refined Analysis
  61. Konus-Wind observation of GRB 120519A
  62. Swift starts a new program to find fainter transients
  63. GRB 120521A: Swift/UVOT Upper Limits
  64. GRB 120521B: Enhanced Swift-XRT position
  65. GRB 120521A: Swift-BAT refined analysis
  66. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  67. GRB 120521B: TAROT La Silla observatory optical observations
  68. GRB 120521B: Swift detection of a burst
  69. GRB 120521A: Enhanced Swift-XRT position
  70. GRB 120521A: TAROT La Silla observatory optical observations
  71. GRB 120521A: Swift detection of a short burst
  72. GRB 120514A : Suzaku WAM observation of the prompt emission
  73. GRB 120512A: A long GRB detected by INTEGRAL
  74. Swift Trigger 522245 is a noise fluctuation near IGR J17091-3624
  75. GRB 120514A: GROND upper limits
  76. GRB 120514A: Swift/UVOT Upper Limits
  77. GRB 120514A: UKIRT IR observations
  78. Konus-Wind observation of GRB 120510A
  79. GRB 120514A: Swift-XRT refined Analysis
  80. GRB 120514A: APEX observations of the submm counterpart
  81. GRB 120514A: Enhanced Swift-XRT position
  82. GRB 120514A: Swift-BAT refined analysis
  83. GRB 120514A: TAROT Calern observatory optical observations
  84. GRB 120514A: Swift detection of a burst
  85. GRB 120422A: Konkoly optical observations
  86. Fermi GBM Trigger 358364818 is not a GRB
  87. Fermi Trigger 358364818: BOOTES-4 observations
  88. GRB 120510B/Fermi Trigger 358364818: MASTER possible OT candidate
  89. GRB 120510A: Swift XRT and UVOT observations
  90. GRB 120510A: MASTER follow up observations
  91. GRB 120510A: MAXI/GSC detection of a burst
  92. GRB 120422A: SN identification from GTC
  93. Fermi/GBM detection of a burst from the magnetar 1E 2259+5
  94. GRB 120422A: P200 NIR detection
  95. GRB 120422A: CARMA 3mm observations
  96. GRB 120422A: VLT/X-shooter spectroscopic evidence for a SN
  97. GRB 120422A: Gemini-N detection of a supernova
  98. GRB 120422A: i-band re-brightening and possible SN detection
  99. GRB 120427A: MASTER follow up observations
  100. GRB 120422A: optical observations

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