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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"

45729 results found.

  1. Swift trigger 524642 / SwJ1910.2-0546
  2. GRB 120602A: Suzaku WAM observation of the prompt emission
  3. Konus-Wind observation of GRB 120617A
  4. IPN Triangulation of GRB 120617A (short/intense)
  5. Swift Trigger 524642 is Swift J1910.2-0546
  6. Trigger 524584: Swift detection of Algol
  7. Swift triggers (#524542) on a Galactic source
  8. Konus-Wind observation of GRB 120602A
  9. IPN Triangulation of GRB 120602A (long/very bright)
  10. GRB 120614A: MAXI/GSC detection of a burst
  11. GRB 120612A: optical observations
  12. GRB 120612A: Swift/UVOT observations
  13. GRB 120612A: Swift-XRT refined Analysis
  14. GRB 120612A: Swift-BAT refined analysis
  15. GRB 120612A: Enhanced Swift-XRT position
  16. GRB 120612A: BOOTES-3 optical upper limit
  17. GRB 120612A: Swift detection of a burst
  18. GRB 120603A: Suzaku WAM observation of the prompt emission
  19. GBM triggers 120604.526 & 120604.399 were not GRBs
  20. Konus-Wind observation of GRB 120603A
  21. IPN Triangulation of short GRB 120603A
  22. Fermi GBM trigger 120602.539 is not a GRB
  23. Konus-Wind observation of GRB 120528B
  24. GRB 120519A: Suzaku WAM observation of the prompt emission
  25. GRB 120528C: MAXI/GSC detection
  26. GRB 120521C redshift estimate
  27. Fermi Gamma-ray Burst Monitor trigger 120527.573 is not a GRB
  28. GRB 120528B: MAXI/GSC detection
  29. GRB 120512A: Suzaku WAM observation of the prompt emission
  30. GRB 120521C: EVLA Localization of Afterglow
  31. GRB 120521C: EVLA 22 GHz Detection
  32. GRB120521B: SSO 2.3m upper limits
  33. Konus-Wind observation of GRB 120522A
  34. IPN triangulation of GRB 120522A (long/intense)
  35. GRB 120521B: Fermi GBM observation
  36. GRB 120521A: ATCA 34GHz upper limit
  37. GRB 120521C: Early Tautenburg limits
  38. GRB 120521C: EVLA 22 GHz Upper Limit
  39. GRB 120521A: GROND Upper limits
  40. GRB 120521C: Swift-XRT refined Analysis
  41. GRB 120521C: Swift-BAT refined analysis
  42. GRB 120521C: Keck Observations
  43. GRB 120521C: Swift/UVOT Upper Limits
  44. GRB 120521B: Swift/UVOT Upper Limits
  45. GRB 120521C: MASTER optical limit
  46. GRB 120521B: GROND Upper limits
  47. GRB 120521A: XRT light curve (Correction to GCN 13326)
  48. GRB 120521A: Swift-XRT refined Analysis
  49. GRB 120521C: PAIRITEL NIR Upper Limits
  50. GRB 120521C: Enhanced Swift-XRT position
  51. GRB 120521C: BOOTES-1 optical observations
  52. GRB 120521C: WHT optical observations
  53. GRB 120521C - NOT optical limits
  54. GRB120521C: Liverpool Telescope observations
  55. GRB 120521C: TAROT Calern observatory optical observations
  56. GRB 120521C: Swift detection of a burst
  57. GRB 120521B: Swift-BAT refined analysis
  58. GRB 120521B: Swift-XRT refined Analysis
  59. Konus-Wind observation of GRB 120519A
  60. Swift starts a new program to find fainter transients
  61. IPN Triangulation of GRB 120519A (short/hard)
  62. GRB 120521A: Swift/UVOT Upper Limits
  63. GRB 120521B: Enhanced Swift-XRT position
  64. GRB 120521A: Swift-BAT refined analysis
  65. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  66. Correction to GCN 13307 (GRB120521B)
  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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