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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"

27462 results found.

  1. GRB 070429A: Swift XRT further analysis
  2. GRB 070309: Swift-XRT afterglow confirmation
  3. Swift/UVOT observations of GRB070429B
  4. GRB 070429B, Swift-BAT refined analysis
  5. Swift/UVOT observations of GRB070429A
  6. GRB 070429A: Swift XRT refined analysis
  7. GRB 070429A, Swift-BAT refined analysis
  8. GRB 070429B: Swift XRT refined analysis
  9. GRB 070429B: ROTSE-III Optical Limits
  10. GRB 070429B: Swift detection of a short burst
  11. GRB 070429: ROTSE-III Optical Limits
  12. GRB 070429: Swift detection of a burst
  13. GRB 070427, Swift-BAT Refined Analysis
  14. GRB 070427: Swift detection of a burst
  15. GRB 070411: Late-time Keck imaging
  16. GRB070419B: Suzaku WAM observation of the prompt emission
  17. GRB 070420: pseudo-z~1.56 from spectral parameters of the prompt
  18. GRB 070420 Swift-BAT Refined Analysis
  19. GRB070419A: Kuiper Optical detection
  20. GRB070419a: Swift UVOT observations
  21. GRB 070419A: MARGE Observations
  22. GRB 070420: Swift XRT refined analysis
  23. GRB070420: Swift UVOT continuing observations
  24. GRB 070411: BART early limit
  25. GRB 070420: Faulkes Telescope South Observations
  26. GBR 070419A: Swift/XRT refined analysis
  27. GRB 070420: TAROT La Silla observatory optical observations
  28. GRB 070420: NIR and optical afterglow confirmed
  29. GRB 070420: Swift detection of a burst with optical afterglow
  30. GRB 070419A: Early Super-LOTIS Observations
  31. GRB 070419B, Swift-BAT refined analysis
  32. GRB 070419A Swift-BAT Refined Analysis
  33. GRB 070419A: RAPTOR Detection of Early Emission
  34. GRB 070419B: Swift XRT refined analysis
  35. GRB 070419A, Optical observations
  36. GRB070419 - SDSS Pre-Burst Observations
  37. GRB 070419A: SARA observations
  38. GRB 070419A: Faulkes Telescope North Optical Observations
  39. GRB070419A, optical observation
  40. Infrared detection of GRB070419A with UKIRT
  41. GRB 070419B: Swift detection of a burst
  42. GRB 070419A: ROTSE-III Optical Limits
  43. GRB 070419: Swift detection of a burst
  44. Swift-BAT Trigger 276045 is a Cosmic Ray Shower event
  45. Trigger 276045: Swift detection of a possible burst
  46. GRB 070406: Swift XRT refined analysis
  47. GRB 070411: TLS data shows plateau, flares
  48. GRB070412: UKIRT-WFCAM JHK upper limits
  49. GRB070412: Swift UVOT observations
  50. IBAS Alert n.4199: Not a GRB
  51. GRB 070411: Swift/UVOT observations
  52. GRB 070412, Swift-BAT refined analysis
  53. GRB 070412 Liverpool Telescope optical limit
  54. GRB 070412: Swift-XRT refined analysis
  55. GRB 070411: Swift-XRT refined analysis
  56. GRB 070412: IAC80 optical afterglow candidate
  57. GRB 070412: NOT observations
  58. GRB 070411, Swift-BAT refined analysis
  59. GRB 070412: Swift detection of a burst
  60. GRB 070411: IAC80 optical observations
  61. GRB 070411 : Liverpool Telescope Observations
  62. GRB 070411: ROTSE-III Detection of Optical Counterpart
  63. GRB 070411: Tautenburg RRM Afterglow Confirmation
  64. GRB 070411: Swift detection of a burst with optical afterglow
  65. GRB 070406: Swift XRT team further analysis
  66. GRB 070406, Swift-BAT refined analysis
  67. GRB070406: Swift UVOT observations
  68. GRB 070406: further analysis of NOT images.
  69. GRB 070406: Swift XRT Team analysis - Possible X-ray counterpart
  70. GRB 070406: NOT observations
  71. GRB 070406: Optical candidate
  72. GRB 070406: SARA upper limit
  73. GRB 070406: Xinglong TNT optical Upper Limit
  74. GRB 070406: photo-z of a bright galaxy in BAT error circle
  75. GRB 070406: Swift detection of a burst
  76. UVOT observations of GRB070330
  77. GRB 070330, Swift-BAT refined analysis
  78. GRB 070330: TAROT La Silla observatory optical observations
  79. GRB 070330 - Watcher Observations
  80. GRB 070330: Swift detection of a burst
  81. GRB 070328: pseudo-z~2.75 from spectral parameters of the prompt
  82. Konus-Wind observation of GRB 070328
  83. GRB 070328: Swift/UVOT Upper Limits
  84. GRB 070328: Swift/XRT Refined Analysis
  85. GRB 070328, Swift-BAT refined analysis
  86. GRB 070328: Swift detection of a burst
  87. GRB070318: Swift UVOT indicates unusual optical/UV afterglow
  88. Short-Hard GRB 070209: PROMPT Observations
  89. GRB 070318: Gemini + Magellan spectra
  90. GRB070318: Swift UVOT continuing observations
  91. GRB070318: Swift-XRT refined analysis
  92. GRB 070318: Swift/UVOT Continued Observations
  93. GRB 070318, Swift-BAT refined analysis
  94. IBAS Alert n. 4176: not a GRB
  95. GRB 070318: Swift detection of a burst with an optical afterglow
  96. IBAS Alert n. 4169: not a GRB
  97. GRB 070311: SARA upper limit
  98. GRB 070311: RAPTOR Detection of Optical Emission
  99. GRB070311: FRAM early follow-up limit
  100. GRB 070311: Swift/UVOT Upper Limits

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