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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"

42845 results found.

  1. GRB 120612A: Swift-BAT refined analysis
  2. GRB 120612A: Enhanced Swift-XRT position
  3. GRB 120612A: BOOTES-3 optical upper limit
  4. GRB 120612A: Swift detection of a burst
  5. GRB 120603A: Suzaku WAM observation of the prompt emission
  6. GBM triggers 120604.526 & 120604.399 were not GRBs
  7. Konus-Wind observation of GRB 120603A
  8. IPN Triangulation of short GRB 120603A
  9. Fermi GBM trigger 120602.539 is not a GRB
  10. Konus-Wind observation of GRB 120528B
  11. GRB 120519A: Suzaku WAM observation of the prompt emission
  12. GRB 120528C: MAXI/GSC detection
  13. GRB 120521C redshift estimate
  14. Fermi Gamma-ray Burst Monitor trigger 120527.573 is not a GRB
  15. GRB 120528B: MAXI/GSC detection
  16. GRB 120512A: Suzaku WAM observation of the prompt emission
  17. GRB 120521C: EVLA Localization of Afterglow
  18. GRB 120521C: EVLA 22 GHz Detection
  19. GRB120521B: SSO 2.3m upper limits
  20. Konus-Wind observation of GRB 120522A
  21. IPN triangulation of GRB 120522A (long/intense)
  22. GRB 120521B: Fermi GBM observation
  23. GRB 120521A: ATCA 34GHz upper limit
  24. GRB 120521C: Early Tautenburg limits
  25. GRB 120521C: EVLA 22 GHz Upper Limit
  26. GRB 120521A: GROND Upper limits
  27. GRB 120521C: Swift-XRT refined Analysis
  28. GRB 120521C: Swift-BAT refined analysis
  29. GRB 120521C: Keck Observations
  30. GRB 120521C: MASTER optical limit
  31. GRB 120521B: GROND Upper limits
  32. GRB 120521A: XRT light curve (Correction to GCN 13326)
  33. GRB 120521A: Swift-XRT refined Analysis
  34. GRB 120521C: PAIRITEL NIR Upper Limits
  35. GRB 120521C: Enhanced Swift-XRT position
  36. GRB 120521C: BOOTES-1 optical observations
  37. GRB 120521C: WHT optical observations
  38. GRB 120521C - NOT optical limits
  39. GRB120521C: Liverpool Telescope observations
  40. GRB 120521C: TAROT Calern observatory optical observations
  41. GRB 120521C: Swift detection of a burst
  42. GRB 120521B: Swift-BAT refined analysis
  43. GRB 120521B: Swift-XRT refined Analysis
  44. Konus-Wind observation of GRB 120519A
  45. Swift starts a new program to find fainter transients
  46. IPN Triangulation of GRB 120519A (short/hard)
  47. GRB 120521B: Enhanced Swift-XRT position
  48. GRB 120521A: Swift-BAT refined analysis
  49. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  50. GRB120521B: Faulkes Telescope South observations
  51. GRB 120521B: TAROT La Silla observatory optical observations
  52. GRB 120521B: Swift detection of a burst
  53. GRB 120521A: Enhanced Swift-XRT position
  54. GRB 120521A: TAROT La Silla observatory optical observations
  55. GRB 120521A: Swift detection of a short burst
  56. GRB 120514A : Suzaku WAM observation of the prompt emission
  57. GRB 120512A: A long GRB detected by INTEGRAL
  58. Swift Trigger 522245 is a noise fluctuation near IGR J17091-3624
  59. GRB 120514A: GROND upper limits
  60. GRB 120514A: Swift/UVOT Upper Limits
  61. GRB 120514A: UKIRT IR observations
  62. Konus-Wind observation of GRB 120510A
  63. GRB 120514A: Swift-XRT refined Analysis
  64. GRB 120514A: APEX observations of the submm counterpart
  65. GRB 120514A: Enhanced Swift-XRT position
  66. GRB 120514A: Swift-BAT refined analysis
  67. GRB 120514A: TAROT Calern observatory optical observations
  68. GRB 120514A: Swift detection of a burst
  69. GRB 120422A: Konkoly optical observations
  70. Fermi GBM Trigger 358364818 is not a GRB
  71. Fermi Trigger 358364818: BOOTES-4 observations
  72. GRB 120510B/Fermi Trigger 358364818: MASTER possible OT candidate
  73. GRB 120510A: Swift XRT and UVOT observations
  74. GRB 120510A: MASTER follow up observations
  75. GRB 120510A: MAXI/GSC detection of a burst
  76. GRB 120422A: SN identification from GTC
  77. Fermi/GBM detection of a burst from the magnetar 1E 2259+5
  78. GRB 120422A: P200 NIR detection
  79. GRB 120422A: CARMA 3mm observations
  80. GRB 120422A: VLT/X-shooter spectroscopic evidence for a SN
  81. GRB 120422A: Gemini-N detection of a supernova
  82. GRB 120422A: i-band re-brightening and possible SN detection
  83. GRB 120427A: MASTER follow up observations
  84. GRB 120422A: optical observations
  85. Konus-Wind observation of GRB 120427A
  86. IPN Triangulation of GRB 120427A
  87. Swift detection of 4U 1630-47
  88. Konus-Wind observation of GRB 120426A
  89. GRB 120422A: Additional Gemini observations and Keck/LRIS spectroscopy
  90. IPN Triangulation of bright GRB 120426A
  91. Swift Trigger 520928 is a noise event
  92. Swift Trigger 520928 is probably not a burst
  93. GRB 120424A: MAXI/GSC detection of a burst
  94. GRB 120422A: 272 GHz observations from SMA
  95. GRB 120422A: JCMT SCUBA-2 sub-mm observation
  96. GRB 120422A: RAPTOR Limits During Gamma-ray Emitting Interval
  97. GRB 120422A: VLT/X-shooter spectroscopy of the GRB counterpart
  98. GRB 120422A GROND observations
  99. GRB 120422A: Super-LOTIS early observations
  100. GRB 120422A: EVLA Detection

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