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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"

46040 results found.

  1. Konus-Wind observation of GRB 120617A
  2. IPN Triangulation of GRB 120617A (short/intense)
  3. Swift Trigger 524642 is Swift J1910.2-0546
  4. Trigger 524584: Swift detection of Algol
  5. Swift triggers (#524542) on a Galactic source
  6. Konus-Wind observation of GRB 120602A
  7. IPN Triangulation of GRB 120602A (long/very bright)
  8. GRB 120614A: MAXI/GSC detection of a burst
  9. GRB 120612A: optical observations
  10. GRB 120612A: Swift/UVOT observations
  11. GRB 120612A: Swift-XRT refined Analysis
  12. GRB 120612A: Swift-BAT refined analysis
  13. GRB 120612A: Enhanced Swift-XRT position
  14. GRB 120612A: BOOTES-3 optical upper limit
  15. GRB 120612A: Swift detection of a burst
  16. GRB 120603A: Suzaku WAM observation of the prompt emission
  17. GBM triggers 120604.526 & 120604.399 were not GRBs
  18. Konus-Wind observation of GRB 120603A
  19. IPN Triangulation of short GRB 120603A
  20. Fermi GBM trigger 120602.539 is not a GRB
  21. Konus-Wind observation of GRB 120528B
  22. GRB 120519A: Suzaku WAM observation of the prompt emission
  23. GRB 120528C: MAXI/GSC detection
  24. GRB 120521C redshift estimate
  25. Fermi Gamma-ray Burst Monitor trigger 120527.573 is not a GRB
  26. GRB 120528B: MAXI/GSC detection
  27. GRB 120512A: Suzaku WAM observation of the prompt emission
  28. GRB 120521C: EVLA Localization of Afterglow
  29. GRB 120521C: EVLA 22 GHz Detection
  30. GRB120521B: SSO 2.3m upper limits
  31. Konus-Wind observation of GRB 120522A
  32. IPN triangulation of GRB 120522A (long/intense)
  33. GRB 120521B: Fermi GBM observation
  34. GRB 120521A: ATCA 34GHz upper limit
  35. GRB 120521C: Early Tautenburg limits
  36. GRB 120521C: EVLA 22 GHz Upper Limit
  37. GRB 120521A: GROND Upper limits
  38. GRB 120521C: Swift-XRT refined Analysis
  39. GRB 120521C: Swift-BAT refined analysis
  40. GRB 120521C: Keck Observations
  41. GRB 120521C: Swift/UVOT Upper Limits
  42. GRB 120521B: Swift/UVOT Upper Limits
  43. GRB 120521C: MASTER optical limit
  44. GRB 120521B: GROND Upper limits
  45. GRB 120521A: XRT light curve (Correction to GCN 13326)
  46. GRB 120521A: Swift-XRT refined Analysis
  47. GRB 120521C: PAIRITEL NIR Upper Limits
  48. GRB 120521C: Enhanced Swift-XRT position
  49. GRB 120521C: BOOTES-1 optical observations
  50. GRB 120521C: WHT optical observations
  51. GRB 120521C - NOT optical limits
  52. GRB120521C: Liverpool Telescope observations
  53. GRB 120521C: TAROT Calern observatory optical observations
  54. GRB 120521C: Swift detection of a burst
  55. GRB 120521B: Swift-BAT refined analysis
  56. GRB 120521B: Swift-XRT refined Analysis
  57. Konus-Wind observation of GRB 120519A
  58. Swift starts a new program to find fainter transients
  59. IPN Triangulation of GRB 120519A (short/hard)
  60. GRB 120521A: Swift/UVOT Upper Limits
  61. GRB 120521B: Enhanced Swift-XRT position
  62. GRB 120521A: Swift-BAT refined analysis
  63. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  64. Correction to GCN 13307 (GRB120521B)
  65. GRB120521B: Faulkes Telescope South observations
  66. GRB 120521B: TAROT La Silla observatory optical observations
  67. GRB 120521B: Swift detection of a burst
  68. GRB 120521A: Enhanced Swift-XRT position
  69. GRB 120521A: TAROT La Silla observatory optical observations
  70. GRB 120521A: Swift detection of a short burst
  71. GRB 120514A : Suzaku WAM observation of the prompt emission
  72. GRB 120512A: A long GRB detected by INTEGRAL
  73. Swift Trigger 522245 is a noise fluctuation near IGR J17091-3624
  74. GRB 120514A: GROND upper limits
  75. GRB 120514A: Swift/UVOT Upper Limits
  76. GRB 120514A: UKIRT IR observations
  77. Konus-Wind observation of GRB 120510A
  78. GRB 120514A: Swift-XRT refined Analysis
  79. GRB 120514A: APEX observations of the submm counterpart
  80. GRB 120514A: Enhanced Swift-XRT position
  81. GRB 120514A: Swift-BAT refined analysis
  82. GRB 120514A: TAROT Calern observatory optical observations
  83. GRB 120514A: Swift detection of a burst
  84. GRB 120422A: Konkoly optical observations
  85. Fermi GBM Trigger 358364818 is not a GRB
  86. Fermi Trigger 358364818: BOOTES-4 observations
  87. GRB 120510B/Fermi Trigger 358364818: MASTER possible OT candidate
  88. GRB 120510A: Swift XRT and UVOT observations
  89. GRB 120510A: MASTER follow up observations
  90. GRB 120510A: MAXI/GSC detection of a burst
  91. GRB 120422A: SN identification from GTC
  92. Fermi/GBM detection of a burst from the magnetar 1E 2259+5
  93. GRB 120422A: P200 NIR detection
  94. GRB 120422A: CARMA 3mm observations
  95. GRB 120422A: VLT/X-shooter spectroscopic evidence for a SN
  96. GRB 120422A: Gemini-N detection of a supernova
  97. GRB 120422A: i-band re-brightening and possible SN detection
  98. GRB 120427A: MASTER follow up observations
  99. GRB 120422A: optical observations
  100. Konus-Wind observation of GRB 120427A

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