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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"

11610 results found.

  1. GRB 131029A: Nanshan optical observations
  2. GRB 131029A: Fermi GBM observation
  3. GRB 131029A Tiled Swift observations
  4. GRB 131029A: Fermi-LAT detection of a burst
  5. Konus-Wind observation of GRB 131028A
  6. IPN Triangulation of GRB 131028A (long/bright)
  7. GRB 131028A: Fermi GBM detection
  8. GRB 131024B: Fermi GBM observation
  9. Fermi GBM trigger 13121024.436 is not a GRB
  10. GRB 131014A: RATIR Optical/NIR Afterglow Retraction
  11. IPN Triangulation of GRB 131014A
  12. GRB 131018B: Swift-XRT observations
  13. GRB 131018B: Fermi GBM observation
  14. GRB 131018B: Fermi-LAT detection of a burst
  15. GRB 131014A: Suzaku WAM observation of the prompt emission
  16. GRB 131014A: GROND observations
  17. GRB 131014A: RATIR Optical/NIR Afterglow Confirmation
  18. Fermi GBM data availability during U.S. government shutdown
  19. GRB 131014A: Swift-XRT refined Analysis
  20. GRB 131011A: Swift/UVOT Upper Limits
  21. GRB 131014A: Swift/UVOT Upper Limits
  22. Fermi 403206457 / GRB 131011A: AAO optical observations
  23. GRB 131014A: RATIR Optical and NIR Observations
  24. Konus-Wind observation of GRB 131014A
  25. GRB 131014A: NOT afterglow candidate
  26. GRB 131014A: Nanshan optical observations
  27. GRB 131014A: Swift detection of a possible X-ray afterglow
  28. GRB 131014A Tiled Swift observations
  29. GRB 131014A: Fermi-LAT detection
  30. GRB 131014A: Fermi GBM detection
  31. GRB 131011A: Fermi GBM detection
  32. iPTF 13dsw/Fermi403206457: X-Shooter redshift
  33. Swift-XRT detection of iPTF 13dsw/Fermi403206457
  34. Fermi403206457: continued P60 observations and fading behavior
  35. Fermi403206457: Weihai optical upper limit
  36. Fermi403206457: NOT optical observations
  37. Fermi403206457: iPTF detection of a possible optical afterglow
  38. GRB 131004A: Fermi GBM observation
  39. GRB 131002A: Fermi GBM observation
  40. Fermi Gamma-ray Burst Monitor trigger 402405063 / 131002466 is not a GRB
  41. IPN Observations of GRB 130925A
  42. Fermi LAT Upper Limits on GRB 130925A
  43. GRB 130925A: Fermi GBM Detection
  44. Konus-Wind observation of GRB 130925A
  45. Observation of possible GRB/TDE 130925A by INTEGRAL/SPI-ACS: three activity episodes
  46. GRB 130925A Swift-BAT refined analysis
  47. Fermi GBM detection of GRB 130925A and a possible precursor
  48. IPN Triangulation of SGR-like burst 130913 - probable association with SGR/AXP 1E1841-045
  49. GRB 130702A: RTT150 optical observations
  50. Fermi Trigger 401326696: MASTER prompt optical observations
  51. Fermi/GBM Detection of two SGR-like bursts possibly associated with SGR J1833-0832
  52. Konus-Wind observation of GRB 130912A
  53. GRB 130912A: Fermi GBM detection
  54. GRB 130828A: Further Swift XRT observations
  55. GRB 130907A: INTEGRAL/SPI-ACS light curve
  56. Errata of GRB name in GCN 15196: should have been GRB 130907A instead of GRB 120916A
  57. GRB 120916A: Fermi-LAT detection of a burst
  58. GRB 130903A: Fermi GBM observation
  59. IPN triangulation of GRB 130828A - error box
  60. GRB 130828A: Swift XRT and UVOT observations
  61. IPN triangulation of GRB 130828A
  62. GRB 130828A Tiled Swift observations
  63. GRB 130828A: Fermi GBM detection
  64. GRB 130828A: Fermi-LAT detection of a burst
  65. IPN triangulation of GRB130821A
  66. Konus-Wind observation of GRB 130821A
  67. GRB 130821A: Swift-XRT observation
  68. GRB 130821A: Fermi-LAT detection of a burst
  69. GRB 130821A: Fermi GBM Detection
  70. Fermi Gamma-ray Burst Monitor trigger 398555975 / 130818916 is not a GRB
  71. GRB 130816A: Fermi GBM observation
  72. Konus-Wind observation of GRB 130804A
  73. IPN localization of GRB 130804A
  74. GRB 130804A; Fermi GBM observation
  75. GRB 130803A; Fermi GBM observation
  76. GRB 130727A: Fermi GBM detection
  77. Fermi Gamma-ray Burst Monitor trigger 396484884 / 130725945 is not a GRB
  78. Fermi Gamma-ray Burst Monitor trigger 396533554 / 130726509 is not a GRB
  79. Fermi Gamma-ray Burst Monitor trigger 396447899 / 130725517 is not a GRB
  80. GRB 130702A in the Ep,i - Eiso plane
  81. GRB 130716A: Fermi GBM observation
  82. GRB 130702A : Xinglong TNT continue optical observation
  83. GRB 130715A: Fermi GBM detection
  84. GRB 130702A: TNG spectroscopic observations of the emerging supernova
  85. GRB 130708A: Fermi GBM observation
  86. GRB 130702A: P200 Spectroscopic Confirmation of Associated Supernova
  87. GRB 130708A found in ground analysis of Swift-BAT data
  88. GRB 130702A: Xinglong TNT optical observation
  89. GRB 130702A: VLA detection
  90. GRB 130702A (= Fermi 394416326): correction of the GCN #14988 title
  91. GRB 130702Ð
  92. Konus-Wind observation of GRB 130702A
  93. GRB 130702A: further TNG observations
  94. GRB 130702A: further Swift-XRT observations
  95. GRB 130702A: Continued P60 observations
  96. GRB 130702A: CARMA 3mm detection
  97. GRB 130702A: TNG optical observations
  98. GRB 130702A / Fermi394416326 : Nanshan optical observations
  99. IPN localization of GRB 130702A (= Fermi 394416326)
  100. Fermi GRB 130702A: Swift XRT and UVOT observations

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