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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"

26512 results found.

  1. GRB 120701A: Swift-BAT refined analysis
  2. GRB 120630A: NOT optical source within the XRT error circle
  3. GRB120624B: Chandra observations and afterglow detection
  4. GRB 120624B: Swift/UVOT Upper Limits
  5. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  6. GRB 120624B: Further analysis of the HAWKI observations
  7. GRB 120624B: Swift-XRT observations
  8. GRB 120624B: NIR counterpart candidate from HAWKI
  9. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  10. GRB 120624B: NOT optical upper limit
  11. GRB 120624B: optical observations
  12. GRB 120624B, Swift-BAT refined analysis
  13. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  14. Konus-Wind observation of GRB 120624B
  15. GRB 120624B: Swift detection of a burst
  16. GRB 120624A: Fermi GBM observation
  17. GRB 120624B: Fermi-LAT Detection
  18. Konus-Wind observation of GRB 120624A
  19. GRB 120624B: Fermi GBM detection
  20. IPN Triangulation of GRB 120624A (short/intense)
  21. GRB 120602A: Suzaku WAM observation of the prompt emission
  22. Konus-Wind observation of GRB 120617A
  23. IPN Triangulation of GRB 120617A (short/intense)
  24. Swift Trigger 524642 is Swift J1910.2-0546
  25. Konus-Wind observation of GRB 120602A
  26. IPN Triangulation of GRB 120602A (long/very bright)
  27. GRB 120612A: Swift-XRT refined Analysis
  28. GRB 120612A: Swift-BAT refined analysis
  29. GRB 120612A: Enhanced Swift-XRT position
  30. GRB 120612A: BOOTES-3 optical upper limit
  31. GRB 120612A: Swift detection of a burst
  32. GRB 120603A: Suzaku WAM observation of the prompt emission
  33. GBM triggers 120604.526 & 120604.399 were not GRBs
  34. Konus-Wind observation of GRB 120603A
  35. IPN Triangulation of short GRB 120603A
  36. Konus-Wind observation of GRB 120528B
  37. GRB 120519A: Suzaku WAM observation of the prompt emission
  38. GRB 120521C redshift estimate
  39. Fermi Gamma-ray Burst Monitor trigger 120527.573 is not a GRB
  40. GRB 120512A: Suzaku WAM observation of the prompt emission
  41. GRB 120521C: EVLA Localization of Afterglow
  42. Konus-Wind observation of GRB 120522A
  43. IPN triangulation of GRB 120522A (long/intense)
  44. GRB 120521B: Fermi GBM observation
  45. GRB 120521A: ATCA 34GHz upper limit
  46. GRB 120521C: Early Tautenburg limits
  47. GRB 120521A: GROND Upper limits
  48. GRB 120521C: Swift-XRT refined Analysis
  49. GRB 120521C: Swift-BAT refined analysis
  50. GRB 120521B: GROND Upper limits
  51. GRB 120521A: Swift-XRT refined Analysis
  52. GRB 120521C: Enhanced Swift-XRT position
  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 120521B: Enhanced Swift-XRT position
  61. GRB 120521A: Swift-BAT refined analysis
  62. GRB 120521B: TAROT La Silla observatory optical observations
  63. GRB 120521B: Swift detection of a burst
  64. GRB 120521A: Enhanced Swift-XRT position
  65. GRB 120521A: TAROT La Silla observatory optical observations
  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. Konus-Wind observation of GRB 120510A
  70. GRB 120514A: Swift-XRT refined Analysis
  71. GRB 120514A: Enhanced Swift-XRT position
  72. GRB 120514A: Swift-BAT refined analysis
  73. GRB 120514A: TAROT Calern observatory optical observations
  74. GRB 120514A: Swift detection of a burst
  75. Fermi GBM Trigger 358364818 is not a GRB
  76. GRB 120510A: Swift XRT and UVOT observations
  77. GRB 120510A: MAXI/GSC detection of a burst
  78. GRB 120422A: SN identification from GTC
  79. Fermi/GBM detection of a burst from the magnetar 1E 2259+5
  80. GRB 120422A: P200 NIR detection
  81. GRB 120422A: Gemini-N detection of a supernova
  82. GRB 120422A: i-band re-brightening and possible SN detection
  83. GRB 120422A: optical observations
  84. Konus-Wind observation of GRB 120427A
  85. IPN Triangulation of GRB 120427A
  86. Konus-Wind observation of GRB 120426A
  87. GRB 120422A: Additional Gemini observations and Keck/LRIS spectroscopy
  88. IPN Triangulation of bright GRB 120426A
  89. Swift Trigger 520928 is probably not a burst
  90. GRB 120422A: VLT/X-shooter spectroscopy of the GRB counterpart
  91. GRB 120422A GROND observations
  92. GRB 120422A: Gemini redshift of candidate host
  93. GRB 120422A: Zadko observatory - Gingin optical observations
  94. GRB 120422A: Swift-XRT refined Analysis
  95. GRB 120422A: Enhanced Swift-XRT position
  96. GRB 120422A: Swift-BAT refined analysis
  97. GRB 120422A: Swift detection of a burst
  98. GRB 120419A: A long GRB detected by INTEGRAL
  99. SGR1806-20, Swift-BAT refined analysis (Trigger 519868)
  100. Swift Trigger 519874 is probably a noise event

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