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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"

12385 results found.

  1. GRB 141229A Tiled Swift observations
  2. GRB 141225A: MASTER-SAAO OT light curve
  3. GRB 141225A: Fermi GBM detection
  4. GRB 141225A: MASTER-SAAO first OT detection
  5. Swift XRT and UVOT observations of GRB141222A
  6. Konus-Wind observation of GRB 141222A
  7. IPN Triangulation of GRB 141222A (very intense)
  8. GRB 141222A: Fermi GBM detection
  9. GRB 141222A: Fermi-LAT detection
  10. GRB 141221A: Fermi GBM observation
  11. Konus-Wind observation of GRB 141220A
  12. GRB 141220A: Fermi GBM observation
  13. Fermi Gamma-ray Burst Monitor trigger 440728127 / 141220020 is not a GRB
  14. IPN Triangulation of GRB 141207A
  15. GRB 141207A: Suzaku WAM observation of the prompt emission
  16. GRB 141202A: Suzaku WAM observation of the prompt emission
  17. GRB 141215A: Fermi GBM detection
  18. IPN Triangulation of GRB 141215A (long/intense)
  19. GRB 141207A: Swift-XRT afterglow candidate detection
  20. Konus-Wind observation of GRB 141207A
  21. GRB141208.63: MASTER OT Detection During the Fermi Error Box inspection
  22. GRB141207A: Discovery Channel Telescope Optical Observations
  23. GRB 141207A: Swift-UVOT Observations
  24. GRB 141207A: Fermi GBM detection
  25. GRB 141207A: Swift-XRT observations
  26. GRB 141207A Tiled Swift observations
  27. GRB 141207A: Fermi-LAT Detection
  28. GRB 141205A: Fermi GBM detection
  29. GRB 141205A Short hard GRB found in ground analysis of BAT data
  30. Konus-Wind observation of GRB 141202A
  31. GRB 141202A: Fermi GBM Detection
  32. IPN Triangulation of GRB 141202A (short/hard)
  33. GRB 141124A​: iPTF upper limits​
  34. GRB141124A: MASTER Detection of New Flare of QSO NVSS J075043+790917 During the Fermi Error Box inspection
  35. GRB 141118A: Fermi GBM Detection
  36. GRB 141118A: iPTF Optical Observations
  37. IPN Triangulation of GRB 141118A
  38. Konus-Wind observation of GRB 141102A
  39. GRB 141102A: Fermi-LAT detection
  40. GRB 141102A: Fermi GBM detection
  41. GRB 141031A: Fermi GBM detection
  42. GRB 141028A: SAO RAS Zeiss-1000 photometry
  43. GRB 141028A: P60 Observations and Decay Index
  44. IPN triangulation of GRB 141029B
  45. GRB 141029B: Fermi GBM detection
  46. GRB 141028A: Swift-XRT observations
  47. GRB 141028A: LCOGTN observations
  48. GRB 141028A: VLT/X-shooter redshift of z=2.33
  49. GRB141028A: Gemini-North redshift
  50. GRB 141028A: RATIR Optical and NIR Observations
  51. GRB 141028A: Swift/XRT detection of the X-ray afterglow
  52. GRB 141028A: GROND Afterglow confirmation (MASTER source)
  53. IPN triangulation of GRB 141028A
  54. GRB 141028A Tiled Swift observations
  55. GRB 141028A: Fermi GBM detection
  56. GRB 141028A: Fermi-LAT detection
  57. Fermi Gamma-ray Burst Monitor trigger 141026452 is not a GRB
  58. Fermi Gamma-ray Burst Monitor trigger 141025734 is not a GRB
  59. GRB141022A: Fermi GBM Detection
  60. GRB141022B: Fermi GBM Detection
  61. Fermi Gamma-ray Burst Monitor trigger 141014781 is not a GRB
  62. Konus-Wind observation of GRB 141011A
  63. IPN Triangulation of GRB 141011A (short/hard)
  64. GRB 141011A: Fermi GBM detection
  65. GRB 141004A: Fermi GBM observation
  66. Konus-Wind observation of GRB 141005A
  67. GRB 141005A: Swift/UVOT Upper Limits
  68. GRB 141005A: Fermi GBM Detection
  69. GRB 140928A: Swift-XRT follow-up observations
  70. GRB 140928A: MAXI-GSC detection
  71. GRB140928A: Gemini-South observation
  72. Konus-Wind observation of GRB 140928A
  73. GRB 140928A: LCO-Cerro Tololo further observations
  74. IPN Triangulation of GRB 140928A
  75. GRB 140928A: LCO-Cerro Tololo observations
  76. GRB 140928A: Fermi GBM detection
  77. GRB 140928A: GROND Afterglow Candidate
  78. GRB 140928A: Swift-XRT observations
  79. GRB 140928A: Fermi-LAT detection
  80. GRB 140919A: Fermi GBM observation
  81. GRB 140916B: LOT and iPTF follow-up of optical afterglow candidates
  82. GRB 140916B: iPTF Optical Observations
  83. Fermi GBM trigger 140913075 is not a GRB
  84. GRB 140907A: MASTER optical observations
  85. GRB 140907A: Fermi GBM Detection
  86. GRB 140906B: Fermi GBM Detection of a Long GRB
  87. GRB 140906A - Fermi GBM Detection
  88. GRB 140906A: iPTF optical transient candidates
  89. GRB 140901B: Swift XRT observation
  90. GRB 140901B: Fermi GBM detection
  91. GRB 140901B found in ground analysis of BAT data
  92. GRB 140901A: Fermi GBM detection
  93. IPN Triangulation of GRB 140901A (short/hard/very intense)
  94. GRB 140831A: iPTF observations of a possible short burst detected by Fermi GBM
  95. GRB 140829A: Fermi GBM Detection
  96. GRB 140829A: iPTF optical observations
  97. GRB 140828A: Fermi GBM observation
  98. IPN Triangulation of GRB 140824B
  99. GRB 140824B: Swift observations
  100. Fermi TRIGGER_NUM 430645968: MASTER OT inside error box

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