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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"

11622 results found.

  1. GRB 131108A: Redshift from 10.4m GTC
  2. GRB 131108A: Swift detection of a possible X-ray afterglow
  3. GRB 131108A Tiled Swift observations
  4. GRB 131108A: Fermi-LAT onboard detection of a burst
  5. GRB 131029A: Suzaku WAM observation of the prompt emission
  6. GRB 131105A: Fermi GBM observation
  7. GRB 131018B: RATIR Optical/NIR Observations
  8. GRB 131031A: Fermi GBM detection
  9. GRB 131018B: Further Swift-XRT observations.
  10. GRB 131031A: MASTER optical observation
  11. GRB 131031A found in ground analysis of BAT data
  12. GRB 131024C: ICSP discovery of a burst in X-rays by balloon borne study
  13. GRB 131029A: Nanshan optical observations
  14. GRB 131029A: Fermi GBM observation
  15. GRB 131029A Tiled Swift observations
  16. GRB 131029A: Fermi-LAT detection of a burst
  17. Konus-Wind observation of GRB 131028A
  18. IPN Triangulation of GRB 131028A (long/bright)
  19. GRB 131028A: Fermi GBM detection
  20. GRB 131024B: Fermi GBM observation
  21. Fermi GBM trigger 13121024.436 is not a GRB
  22. GRB 131014A: RATIR Optical/NIR Afterglow Retraction
  23. IPN Triangulation of GRB 131014A
  24. GRB 131018B: Swift-XRT observations
  25. GRB 131018B: Fermi GBM observation
  26. GRB 131018B: Fermi-LAT detection of a burst
  27. GRB 131014A: Suzaku WAM observation of the prompt emission
  28. GRB 131014A: GROND observations
  29. GRB 131014A: RATIR Optical/NIR Afterglow Confirmation
  30. Fermi GBM data availability during U.S. government shutdown
  31. GRB 131014A: Swift-XRT refined Analysis
  32. GRB 131011A: Swift/UVOT Upper Limits
  33. GRB 131014A: Swift/UVOT Upper Limits
  34. Fermi 403206457 / GRB 131011A: AAO optical observations
  35. GRB 131014A: RATIR Optical and NIR Observations
  36. Konus-Wind observation of GRB 131014A
  37. GRB 131014A: NOT afterglow candidate
  38. GRB 131014A: Nanshan optical observations
  39. GRB 131014A: Swift detection of a possible X-ray afterglow
  40. GRB 131014A Tiled Swift observations
  41. GRB 131014A: Fermi-LAT detection
  42. GRB 131014A: Fermi GBM detection
  43. GRB 131011A: Fermi GBM detection
  44. iPTF 13dsw/Fermi403206457: X-Shooter redshift
  45. Swift-XRT detection of iPTF 13dsw/Fermi403206457
  46. Fermi403206457: continued P60 observations and fading behavior
  47. Fermi403206457: Weihai optical upper limit
  48. Fermi403206457: NOT optical observations
  49. Fermi403206457: iPTF detection of a possible optical afterglow
  50. GRB 131004A: Fermi GBM observation
  51. GRB 131002A: Fermi GBM observation
  52. Fermi Gamma-ray Burst Monitor trigger 402405063 / 131002466 is not a GRB
  53. IPN Observations of GRB 130925A
  54. Fermi LAT Upper Limits on GRB 130925A
  55. GRB 130925A: Fermi GBM Detection
  56. Konus-Wind observation of GRB 130925A
  57. Observation of possible GRB/TDE 130925A by INTEGRAL/SPI-ACS: three activity episodes
  58. GRB 130925A Swift-BAT refined analysis
  59. Fermi GBM detection of GRB 130925A and a possible precursor
  60. IPN Triangulation of SGR-like burst 130913 - probable association with SGR/AXP 1E1841-045
  61. GRB 130702A: RTT150 optical observations
  62. Fermi Trigger 401326696: MASTER prompt optical observations
  63. Fermi/GBM Detection of two SGR-like bursts possibly associated with SGR J1833-0832
  64. Konus-Wind observation of GRB 130912A
  65. GRB 130912A: Fermi GBM detection
  66. GRB 130828A: Further Swift XRT observations
  67. GRB 130907A: INTEGRAL/SPI-ACS light curve
  68. Errata of GRB name in GCN 15196: should have been GRB 130907A instead of GRB 120916A
  69. GRB 120916A: Fermi-LAT detection of a burst
  70. GRB 130903A: Fermi GBM observation
  71. IPN triangulation of GRB 130828A - error box
  72. GRB 130828A: Swift XRT and UVOT observations
  73. IPN triangulation of GRB 130828A
  74. GRB 130828A Tiled Swift observations
  75. GRB 130828A: Fermi GBM detection
  76. GRB 130828A: Fermi-LAT detection of a burst
  77. IPN triangulation of GRB130821A
  78. Konus-Wind observation of GRB 130821A
  79. GRB 130821A: Swift-XRT observation
  80. GRB 130821A: Fermi-LAT detection of a burst
  81. GRB 130821A: Fermi GBM Detection
  82. Fermi Gamma-ray Burst Monitor trigger 398555975 / 130818916 is not a GRB
  83. GRB 130816A: Fermi GBM observation
  84. Konus-Wind observation of GRB 130804A
  85. IPN localization of GRB 130804A
  86. GRB 130804A; Fermi GBM observation
  87. GRB 130803A; Fermi GBM observation
  88. GRB 130727A: Fermi GBM detection
  89. Fermi Gamma-ray Burst Monitor trigger 396484884 / 130725945 is not a GRB
  90. Fermi Gamma-ray Burst Monitor trigger 396533554 / 130726509 is not a GRB
  91. Fermi Gamma-ray Burst Monitor trigger 396447899 / 130725517 is not a GRB
  92. GRB 130702A in the Ep,i - Eiso plane
  93. GRB 130716A: Fermi GBM observation
  94. GRB 130702A : Xinglong TNT continue optical observation
  95. GRB 130715A: Fermi GBM detection
  96. GRB 130702A: TNG spectroscopic observations of the emerging supernova
  97. GRB 130708A: Fermi GBM observation
  98. GRB 130702A: P200 Spectroscopic Confirmation of Associated Supernova
  99. GRB 130708A found in ground analysis of Swift-BAT data
  100. GRB 130702A: Xinglong TNT optical observation

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