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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"

45723 results found.

  1. Swift triggers (#524542) on a Galactic source
  2. Konus-Wind observation of GRB 120602A
  3. IPN Triangulation of GRB 120602A (long/very bright)
  4. GRB 120614A: MAXI/GSC detection of a burst
  5. GRB 120612A: optical observations
  6. GRB 120612A: Swift/UVOT observations
  7. GRB 120612A: Swift-XRT refined Analysis
  8. GRB 120612A: Swift-BAT refined analysis
  9. GRB 120612A: Enhanced Swift-XRT position
  10. GRB 120612A: BOOTES-3 optical upper limit
  11. GRB 120612A: Swift detection of a burst
  12. GRB 120603A: Suzaku WAM observation of the prompt emission
  13. GBM triggers 120604.526 & 120604.399 were not GRBs
  14. Konus-Wind observation of GRB 120603A
  15. IPN Triangulation of short GRB 120603A
  16. Fermi GBM trigger 120602.539 is not a GRB
  17. Konus-Wind observation of GRB 120528B
  18. GRB 120519A: Suzaku WAM observation of the prompt emission
  19. GRB 120528C: MAXI/GSC detection
  20. GRB 120521C redshift estimate
  21. Fermi Gamma-ray Burst Monitor trigger 120527.573 is not a GRB
  22. GRB 120528B: MAXI/GSC detection
  23. GRB 120512A: Suzaku WAM observation of the prompt emission
  24. GRB 120521C: EVLA Localization of Afterglow
  25. GRB 120521C: EVLA 22 GHz Detection
  26. GRB120521B: SSO 2.3m upper limits
  27. Konus-Wind observation of GRB 120522A
  28. IPN triangulation of GRB 120522A (long/intense)
  29. GRB 120521B: Fermi GBM observation
  30. GRB 120521A: ATCA 34GHz upper limit
  31. GRB 120521C: Early Tautenburg limits
  32. GRB 120521C: EVLA 22 GHz Upper Limit
  33. GRB 120521A: GROND Upper limits
  34. GRB 120521C: Swift-XRT refined Analysis
  35. GRB 120521C: Swift-BAT refined analysis
  36. GRB 120521C: Keck Observations
  37. GRB 120521C: Swift/UVOT Upper Limits
  38. GRB 120521B: Swift/UVOT Upper Limits
  39. GRB 120521C: MASTER optical limit
  40. GRB 120521B: GROND Upper limits
  41. GRB 120521A: XRT light curve (Correction to GCN 13326)
  42. GRB 120521A: Swift-XRT refined Analysis
  43. GRB 120521C: PAIRITEL NIR Upper Limits
  44. GRB 120521C: Enhanced Swift-XRT position
  45. GRB 120521C: BOOTES-1 optical observations
  46. GRB 120521C: WHT optical observations
  47. GRB 120521C - NOT optical limits
  48. GRB120521C: Liverpool Telescope observations
  49. GRB 120521C: TAROT Calern observatory optical observations
  50. GRB 120521C: Swift detection of a burst
  51. GRB 120521B: Swift-BAT refined analysis
  52. GRB 120521B: Swift-XRT refined Analysis
  53. Konus-Wind observation of GRB 120519A
  54. Swift starts a new program to find fainter transients
  55. IPN Triangulation of GRB 120519A (short/hard)
  56. GRB 120521A: Swift/UVOT Upper Limits
  57. GRB 120521B: Enhanced Swift-XRT position
  58. GRB 120521A: Swift-BAT refined analysis
  59. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  60. Correction to GCN 13307 (GRB120521B)
  61. GRB 120521B: TAROT La Silla observatory optical observations
  62. GRB 120521B: Swift detection of a burst
  63. GRB 120521A: Enhanced Swift-XRT position
  64. GRB 120521A: TAROT La Silla observatory optical observations
  65. GRB 120521A: Swift detection of a short burst
  66. GRB 120514A : Suzaku WAM observation of the prompt emission
  67. GRB 120512A: A long GRB detected by INTEGRAL
  68. Swift Trigger 522245 is a noise fluctuation near IGR J17091-3624
  69. GRB 120514A: GROND upper limits
  70. GRB 120514A: Swift/UVOT Upper Limits
  71. GRB 120514A: UKIRT IR observations
  72. Konus-Wind observation of GRB 120510A
  73. GRB 120514A: Swift-XRT refined Analysis
  74. GRB 120514A: APEX observations of the submm counterpart
  75. GRB 120514A: Enhanced Swift-XRT position
  76. GRB 120514A: Swift-BAT refined analysis
  77. GRB 120514A: TAROT Calern observatory optical observations
  78. GRB 120514A: Swift detection of a burst
  79. GRB 120422A: Konkoly optical observations
  80. Fermi GBM Trigger 358364818 is not a GRB
  81. Fermi Trigger 358364818: BOOTES-4 observations
  82. GRB 120510B/Fermi Trigger 358364818: MASTER possible OT candidate
  83. GRB 120510A: Swift XRT and UVOT observations
  84. GRB 120510A: MASTER follow up observations
  85. GRB 120510A: MAXI/GSC detection of a burst
  86. GRB 120422A: SN identification from GTC
  87. Fermi/GBM detection of a burst from the magnetar 1E 2259+5
  88. GRB 120422A: P200 NIR detection
  89. GRB 120422A: CARMA 3mm observations
  90. GRB 120422A: VLT/X-shooter spectroscopic evidence for a SN
  91. GRB 120422A: Gemini-N detection of a supernova
  92. GRB 120422A: i-band re-brightening and possible SN detection
  93. GRB 120427A: MASTER follow up observations
  94. GRB 120422A: optical observations
  95. Konus-Wind observation of GRB 120427A
  96. IPN Triangulation of GRB 120427A
  97. Swift detection of 4U 1630-47
  98. GRB 120422A, the review of the sky area in plate archives
  99. Konus-Wind observation of GRB 120426A
  100. GRB 120422A: Additional Gemini observations and Keck/LRIS spectroscopy

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