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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"

12388 results found.

  1. GRB 141229A: Swift-XRT observations
  2. Fermi GBM trigger 141229739 is not a GRB
  3. GRB 141229A: Fermi GBM detection
  4. GRB 141229A Tiled Swift observations
  5. GRB 141225A: MASTER-SAAO OT light curve
  6. GRB 141225A: Fermi GBM detection
  7. GRB 141225A: MASTER-SAAO first OT detection
  8. Swift XRT and UVOT observations of GRB141222A
  9. Konus-Wind observation of GRB 141222A
  10. IPN Triangulation of GRB 141222A (very intense)
  11. GRB 141222A: Fermi GBM detection
  12. GRB 141222A: Fermi-LAT detection
  13. GRB 141221A: Fermi GBM observation
  14. Konus-Wind observation of GRB 141220A
  15. GRB 141220A: Fermi GBM observation
  16. Fermi Gamma-ray Burst Monitor trigger 440728127 / 141220020 is not a GRB
  17. IPN Triangulation of GRB 141207A
  18. GRB 141207A: Suzaku WAM observation of the prompt emission
  19. GRB 141202A: Suzaku WAM observation of the prompt emission
  20. GRB 141215A: Fermi GBM detection
  21. IPN Triangulation of GRB 141215A (long/intense)
  22. GRB 141207A: Swift-XRT afterglow candidate detection
  23. Konus-Wind observation of GRB 141207A
  24. GRB141208.63: MASTER OT Detection During the Fermi Error Box inspection
  25. GRB141207A: Discovery Channel Telescope Optical Observations
  26. GRB 141207A: Swift-UVOT Observations
  27. GRB 141207A: Fermi GBM detection
  28. GRB 141207A: Swift-XRT observations
  29. GRB 141207A Tiled Swift observations
  30. GRB 141207A: Fermi-LAT Detection
  31. GRB 141205A: Fermi GBM detection
  32. GRB 141205A Short hard GRB found in ground analysis of BAT data
  33. Konus-Wind observation of GRB 141202A
  34. GRB 141202A: Fermi GBM Detection
  35. IPN Triangulation of GRB 141202A (short/hard)
  36. GRB 141124A​: iPTF upper limits​
  37. GRB141124A: MASTER Detection of New Flare of QSO NVSS J075043+790917 During the Fermi Error Box inspection
  38. GRB 141118A: Fermi GBM Detection
  39. GRB 141118A: iPTF Optical Observations
  40. IPN Triangulation of GRB 141118A
  41. Konus-Wind observation of GRB 141102A
  42. GRB 141102A: Fermi-LAT detection
  43. GRB 141102A: Fermi GBM detection
  44. GRB 141031A: Fermi GBM detection
  45. GRB 141028A: SAO RAS Zeiss-1000 photometry
  46. GRB 141028A: P60 Observations and Decay Index
  47. IPN triangulation of GRB 141029B
  48. GRB 141029B: Fermi GBM detection
  49. GRB 141028A: Swift-XRT observations
  50. GRB 141028A: LCOGTN observations
  51. GRB 141028A: VLT/X-shooter redshift of z=2.33
  52. GRB141028A: Gemini-North redshift
  53. GRB 141028A: RATIR Optical and NIR Observations
  54. GRB 141028A: Swift/XRT detection of the X-ray afterglow
  55. GRB 141028A: GROND Afterglow confirmation (MASTER source)
  56. IPN triangulation of GRB 141028A
  57. GRB 141028A Tiled Swift observations
  58. GRB 141028A: Fermi GBM detection
  59. GRB 141028A: Fermi-LAT detection
  60. Fermi Gamma-ray Burst Monitor trigger 141026452 is not a GRB
  61. Fermi Gamma-ray Burst Monitor trigger 141025734 is not a GRB
  62. GRB141022A: Fermi GBM Detection
  63. GRB141022B: Fermi GBM Detection
  64. Fermi Gamma-ray Burst Monitor trigger 141014781 is not a GRB
  65. Konus-Wind observation of GRB 141011A
  66. IPN Triangulation of GRB 141011A (short/hard)
  67. GRB 141011A: Fermi GBM detection
  68. GRB 141004A: Fermi GBM observation
  69. Konus-Wind observation of GRB 141005A
  70. GRB 141005A: Swift/UVOT Upper Limits
  71. GRB 141005A: Fermi GBM Detection
  72. GRB 140928A: Swift-XRT follow-up observations
  73. GRB 140928A: MAXI-GSC detection
  74. GRB140928A: Gemini-South observation
  75. Konus-Wind observation of GRB 140928A
  76. GRB 140928A: LCO-Cerro Tololo further observations
  77. IPN Triangulation of GRB 140928A
  78. GRB 140928A: LCO-Cerro Tololo observations
  79. GRB 140928A: Fermi GBM detection
  80. GRB 140928A: GROND Afterglow Candidate
  81. GRB 140928A: Swift-XRT observations
  82. GRB 140928A: Fermi-LAT detection
  83. GRB 140919A: Fermi GBM observation
  84. GRB 140916B: LOT and iPTF follow-up of optical afterglow candidates
  85. GRB 140916B: iPTF Optical Observations
  86. Fermi GBM trigger 140913075 is not a GRB
  87. GRB 140907A: MASTER optical observations
  88. GRB 140907A: Fermi GBM Detection
  89. GRB 140906B: Fermi GBM Detection of a Long GRB
  90. GRB 140906A - Fermi GBM Detection
  91. GRB 140906A: iPTF optical transient candidates
  92. GRB 140901B: Swift XRT observation
  93. GRB 140901B: Fermi GBM detection
  94. GRB 140901B found in ground analysis of BAT data
  95. GRB 140901A: Fermi GBM detection
  96. IPN Triangulation of GRB 140901A (short/hard/very intense)
  97. GRB 140831A: iPTF observations of a possible short burst detected by Fermi GBM
  98. GRB 140829A: Fermi GBM Detection
  99. GRB 140829A: iPTF optical observations
  100. GRB 140828A: Fermi GBM observation

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