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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"

23609 results found.

  1. GRB 070419A, Deep LBT photometry
  2. Konus-Wind and Konus-A observation of GRB 070508
  3. GRB 070510: Swift detection of a possible burst
  4. GRB070509: Swift-XRT Refined Analysis
  5. RHESSI Spectrum of GRB070508
  6. GRB 070509, Swift-BAT refined analysis
  7. GRB 070508: Suzaku/WAM observation of the prompt emission
  8. GRB 070509: Swift detection of a burst
  9. GRB 070508, Swift-BAT refined analysis
  10. GRB 070508: Optical observation limiting magnitude
  11. GRB 070508: Optical afterglow detection
  12. GRB 070508: TAROT La Silla observatory optical observations
  13. GRB 070508: Swift detection of an intense burst with an optical counterpart
  14. GRB070412: MAGIC telescope GeV observation
  15. Swift-BAT trigger 278809 is not a GRB
  16. GRB 070507: Swift detection of a possible cosmic ray shower event or a possible burst
  17. GRB 070506: VLT redshift
  18. GRB 070506, Swift-BAT Refined Analysis
  19. GRB 070506: Swift detection of a burst with optical afterglow
  20. GRB 070412, deep LBT imaging
  21. GRB 070429B, Swift-BAT refined analysis
  22. GRB 070429A, Swift-BAT refined analysis
  23. GRB 070429A: optical and NIR observations
  24. GRB 070429B: Swift detection of a short burst
  25. GRB 070429: Swift detection of a burst
  26. GRB 070427, Swift-BAT Refined Analysis
  27. GRB 070427: Swift detection of a burst
  28. GRB 070411, further deep LBT photometry
  29. GRB070419B: Suzaku WAM observation of the prompt emission
  30. GRB 070411, deep LBT photometry
  31. Konus-Wind observation of GRB 070420
  32. GRB 070411: break in the optical light curve
  33. GRB 070420 Swift-BAT Refined Analysis
  34. GRB070419a: Swift UVOT observations
  35. GRB 070419A: MARGE Observations
  36. GRB 070420: optical rebrightening observed at Mt. John
  37. GRB 070420: Swift XRT refined analysis
  38. GRB070420: Swift UVOT continuing observations
  39. GRB 070420: Faulkes Telescope South Observations
  40. GBR 070419A: Swift/XRT refined analysis
  41. GRB 070420: TAROT La Silla observatory optical observations
  42. GRB 070420: Swift detection of a burst with optical afterglow
  43. GRB 070419A: MITSuME Okayama Observations
  44. GRB 070419A: Early Super-LOTIS Observations
  45. GRB 070419B, Swift-BAT refined analysis
  46. GRB 070419A Swift-BAT Refined Analysis
  47. GRB 070419: Keck/LRIS Absorption Redshift
  48. GRB 070419B: optical afterglow confirmation
  49. GRB 070419A, Optical observations
  50. GRB070419 - SDSS Pre-Burst Observations
  51. GRB 070419A: NAYUTA Optical Observation
  52. GRB 070419A: Faulkes Telescope North Optical Observations
  53. GRB 070419B optical afterglow candidate
  54. GRB 070419A: Optical and IR observations with KANATA
  55. GRB 070419B: optical afterglow candidate
  56. GRB070419A, optical observation
  57. GRB 070419B: Swift detection of a burst
  58. GRB 070419: Swift detection of a burst
  59. Swift-BAT Trigger 276045 is a Cosmic Ray Shower event
  60. GRB 070418: Optical and IR observations with KANATA
  61. Trigger 276045: Swift detection of a possible burst
  62. GRB 070412, Swift-BAT refined analysis
  63. GRB 070412 Liverpool Telescope optical limit
  64. GRB 070411: Optical photometry at Crni Vrh
  65. GRB 070411: OA redshift
  66. GRB 070412: Swift-XRT refined position
  67. GRB 070412: IAC80 optical afterglow candidate
  68. GRB 070411: Magellan/Clay photometry
  69. GRB 070411, Swift-BAT refined analysis
  70. GRB 070412: Swift detection of a burst
  71. GRB 070411: IAC80 optical observations
  72. GRB 070411 : Liverpool Telescope Observations
  73. GRB 070411: Swift detection of a burst with optical afterglow
  74. Suzaku ToO observation of SGR 1806-20
  75. GRB 070406, Swift-BAT refined analysis
  76. GRB070406: Swift UVOT observations
  77. GRB 070406: Xinglong TNT optical Upper Limit
  78. GRB 070406: Swift detection of a burst
  79. GRB 070402: Suzaku WAM observation of the prompt emission
  80. GRB 070311, deep optical photometry
  81. Konus-Wind and Konus-A observations of GRB 070402
  82. IPN triangulation of GRB070402
  83. GRB 070328: Suzaku WAM observation of the prompt emission
  84. GRB 070330, Swift-BAT refined analysis
  85. GRB 070330: TAROT La Silla observatory optical observations
  86. GRB 070330: Swift detection of a burst
  87. Konus-Wind observation of GRB 070328
  88. long burst from SGR 1806-20 detected on March 26
  89. GRB 070328 : Suzaku ToO follow up starts
  90. GRB 070328, Swift-BAT refined analysis
  91. GRB 070328: Swift detection of a burst
  92. GRB 070311, deep optical photometry
  93. Short-Hard GRB 070209: PROMPT Observations
  94. GRB070318: Swift UVOT continuing observations
  95. GRB 070318, Swift-BAT refined analysis
  96. GRB 070318: Swift detection of a burst with an optical afterglow
  97. GRB 070311: Tautenburg sees afterglow fading
  98. IBAS Alert n. 4169: not a GRB
  99. GRB 070311: MITSuME Okayama Optical Observation
  100. GRB 070311: a long GRB detected by INTEGRAL

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