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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"

26553 results found.

  1. GRB 130327A: RATIR Optical/NIR afterglow confirmation
  2. GRB 130306A: Confirmation of the X-ray Afterglow
  3. Konus-Wind observation of GRB 130327B
  4. GRB 130327B: Fermi-LAT detection of a burst
  5. GRB 130327B: Fermi GBM detection
  6. Swift Trigger 552142: a possible GRB
  7. GRB 130327B: gamma-ray detection by AGILE
  8. GRB 130327A: Swift-BAT refined analysis
  9. GRB 130327A: Gemini Observations
  10. GRB 130327A: Swift-XRT refined Analysis
  11. GRB 130327A: Weihai optical obsevations
  12. Konus-Wind observation of GRB 130325A
  13. GRB 130327A: Enhanced Swift-XRT position
  14. GRB 130325A: Fermi LAT detection
  15. GRB 130327A: Swift detection of a burst
  16. report: GRB 130315A: Zadko observatory - Gingin optical observations
  17. GRB 130325A: Fermi GBM detection
  18. Konus-Wind observation of GRB 130320A
  19. IPN Triangulation of GRB 130320A (long/very bright)
  20. GRB 130315A: GROND afterglow candidate
  21. GRB 130315A: Swift/UVOT Upper Limits
  22. GRB 130315A: SALT optical observations
  23. GRB 130315A, Swift-BAT refined analysis
  24. GRB130315A BOOTES-3 optical limit
  25. GRB 130315A: Swift detection of a burst
  26. GRB 130310A : Suzaku WAM observation of the prompt emission
  27. GRB 130305A: TLS Tautenburg observations
  28. GRB 130313A: TNG optical observations
  29. GRB 130313A: Fading X-ray Afterglow
  30. GRB 130215A: Detection of the SN with the 10.4m GTC
  31. GRB130313A: Optical observations from GTC
  32. GRB 130313A: simultaneous and follow-up optical observations at BOOTES-3 and BOOTES-4
  33. GRB 130313A: Swift-BAT refined analysis
  34. GRB 130313A: Zadko observatory - Gingin optical observations
  35. GRB 130313A: Swift detection of a short burst
  36. IPN Triangulation of GRB 130307A
  37. Swift XRT RETRACTION of GRB 130310A afterglow detection
  38. GRB 130306A: Swift Detection of a Possible Afterglow
  39. Konus-Wind observation of GRB 130310A
  40. IPN triangulation of GRB 130310A
  41. GRB 130310A: Fermi GBM detection
  42. GRB 130306A: Swift-BAT refined analysis
  43. IPN triangulation of GRB 130228A
  44. GRB 130305A BAT refined circular
  45. Konus-Wind observation of GRB 130306A
  46. GRB 130307A: Fermi GBM detection
  47. GRB 130306A: Fermi GBM observation
  48. GRB 130306A: MASTER-Net pre-Swift alert observation
  49. GRB 130306A: Swift detection of a burst
  50. GRB 130305A: Swift/XRT detection of the afterglow
  51. Konus-Wind observation of GRB 130305A
  52. GRB 130305A: Fermi GBM observation
  53. GRB 130305A: Fermi LAT Detection
  54. GBM trigger 383712005 (GRB 130228A?) : Possible high-energy photon emission in Fermi/LAT data
  55. GRB 130305A found in ground analysis of Swift/BAT data
  56. GRB 130219A: Suzaku WAM observation of the prompt emission
  57. Trigger 549841: Swift detection of SGR1806-20
  58. Konus-Wind observation of GRB 130219A
  59. GRB 130216B: Suzaku WAM observation of the prompt emission
  60. GRB 130216A: possible radio counterpart is steady field source
  61. IPN Triangulation of GRB 130219A
  62. GRB 130215A: Suzaku WAM observation of the prompt emission
  63. GRB 130215A: PTF P48 optical detection
  64. GRB 130219A: Fermi GBM detection
  65. GRB 130216A: Further Swift-BAT refined analysis
  66. GRB 130216B: MASTER-Net early observation
  67. GRB 130216A: MASTER-Net early observations
  68. GRB 130216A: Fermi GBM observation
  69. GRB 130216B: Fermi GBM observation
  70. GRB 130216B BAT refined analysis
  71. GRB 130216B: P200 NIR Observations
  72. GRB 130216A: P200 NIR Observations
  73. GRB 130216A: Swift-BAT refined analysis
  74. GRB 130216A: TAROT La Silla observatory optical observations
  75. GRB 120118B: host observations and redshift determination
  76. GRB 130216A: OSN I-band observations
  77. GRB 130216A: Swift detection of a burst
  78. GRB 130215A: P200 NIR observations
  79. GRB 130215A: GROND Detection of the Optical/NIR Afterglow
  80. GRB 130215A: Fermi GBM detection
  81. GRB 130215A: RAPTOR Measurements
  82. GRB 130215A: Swift-BAT refined analysis
  83. GRB 130215A: TAROT La Silla observatory optical observations
  84. GRB 130215A: RATIR Optical and NIR Observations
  85. GRB 130215A: REM NIR observations
  86. GRB 130215A: ROTSE-III data analysis
  87. Skynet Observations of GRB130215
  88. GRB 130215A: Swift detection of a burst
  89. GRB 130211A: Swift-BAT refined analysis
  90. GRB 130211A: GROND detection of the afterglow
  91. GRB 130211A: Swift detection of a burst
  92. GRB 130206A: Fermi LAT Observations
  93. GRB 130206A: Fermi GBM observation
  94. GRB 130206A, Swift-BAT refined analysis
  95. GRB 130206A: Zadko observatory - Gingin optical observations
  96. GRB 130131A: optical observation in Mondy observatory
  97. GRB 130206A: Swift detection of a burst
  98. GRB 130131A: RATIR optical and infrared upper limits
  99. GRB 130131B: Swift-XRT refined Analysis
  100. GRB 130131A - UKIRT confirmation of afterglow

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