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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"

37674 results found.

  1. GRB 130514B: RATIR Optical and NIR Observations
  2. Fermi GBM trigger 390275038 / 130515072 is not a GRB
  3. GRB 130515A: Fermi GBM detection
  4. GRB 130427A: Skynet detections of a possible supernova
  5. GRB 130515A: Swift-XRT refined Analysis
  6. GRB 130515A: Swift/UVOT Upper Limits
  7. GRB 130514B Swift-BAT observations
  8. GRB 130515A: Swift-BAT refined analysis
  9. GRB 130514B: GROND observations
  10. GRB 130515A: Gemini/GMOS Observations
  11. GRB 130515A: GROND Observations
  12. GRB 130515A: Enhanced Swift-XRT position
  13. GRB 130515A: VLT acquisition observation
  14. GRB 130511A: SSO 2.3m observation
  15. GRB 130514B: Swift-XRT Observations
  16. GRB 130515A: Swift detection of a short burst
  17. GRB 130514A: Swift-XRT refined Analysis
  18. GRB 130514A: Skynet/PROMPT/DSO Detections
  19. GRB 130513A: Bassano Bresciano optical upper limit
  20. GRB 130427A: Spectroscopic detection of the SN from the 10.4m GTC
  21. GRB 130427A: optical observations
  22. GRB130514B: MASTER-Net optical observations.
  23. GRB 130514A: RATIR Optical and NIR Observations
  24. GRB 130513A: RATIR Optical and NIR Observations
  25. GRB 130513A: Swift/UVOT Upper Limits
  26. GRB 130514A: Swift/UVOT Upper Limits
  27. GRB 130513A: GROND observations
  28. GRB 130514B: a long GRB detected by INTEGRAL
  29. GRB 130514A: Enhanced Swift-XRT position
  30. GRB 130514A: Swift-BAT refined analysis
  31. GRB 130513A: Swift-XRT detection of the afterglow.
  32. GRB 130514A: GROND optical-NIR afterglow discovery and photo-z
  33. GRB 130514A: P60 Observations
  34. GRB 130514A: Swift detection of a burst
  35. GRB 130427A: Tautenburg 2nd epoch: No break, no clear SN
  36. GRB 130513A: a long GRB detected by INTEGRAL
  37. GRB130508A: MASTER-Net optical observations
  38. GRB130511A: SOAO Optical Observation
  39. GRB 130511A: Swift-XRT refined Analysis
  40. GRB 130511A: Kanata/HOWPol optical observation
  41. GRB 130511A: MITSuME Okayama upper limits
  42. GRB 130511A, Swift-BAT refined analysis
  43. GRB 130511A: Upper limit by Xinglong TNT optical observation
  44. GRB 130511A: Enhanced Swift-XRT position
  45. GRB 130511A: Gemini-North Redshift
  46. GRB 130511A: Swift detection of a burst with an optical counterpart
  47. GRB 130508A: Swift/UVOT Upper Limits
  48. GRB 130508A: MITSuME Akeno upper limits
  49. GRB 130427A: host galaxy observations
  50. GRB 130508A: RATIR Optical and NIR Observations
  51. GRB 130427A: Keck/LRIS Observations
  52. GRB 130508A: Refined Swift-XRT analysis: Correction to GCN 14612
  53. GRB 130508A, Swift-BAT refined analysis
  54. GRB 130508A: MITSuME Okayama upper limits
  55. Fermi Trigger 130507.091 - Detection of a SGR-like Burst
  56. GRB130508A: BOOTES-3 optical limit
  57. GRB 130427A: Ten nights of Skynet/PROMPT/GORT observations
  58. GRB 130508A: Swift detection of a probable burst
  59. GRB 130427A: Continued RATIR Optical and NIR Observations
  60. GRB 130427A, LBT optical spectrum
  61. GRB 130505B: Further Swift observations
  62. GRB 130504C: Swift-XRT afterglow confirmation
  63. GRB 130505A: MITSuME Akeno Optical observation
  64. GRB 130504C: Suzaku WAM observation of the prompt emission
  65. GRB 130504B: Suzaku WAM observation of the prompt emission
  66. GRB 130505A: Suzaku WAM observation of the prompt emission
  67. GRB 130427A, Watcher afterglow detection
  68. GRB 130427A: Excess optical emission consistent with an emerging supernova
  69. GRB 130427A: Amateur observations from Sweden
  70. GRB 130505A: RATIR Optical and NIR Observations
  71. GRB 130505B: Swift Candidate Afterglow
  72. GRB 130505A: Tautenburg afterglow observations
  73. GRB 130427A: Tautenburg afterglow observations
  74. Refined IPN Triangulation of GRB 130502B
  75. GRB 130427A: RHESSI observations
  76. GRB 130505A, Swift-BAT refined analysis
  77. GRB 130504C: further Swift-XRT observations
  78. Konus-Wind observation of GRB 130504C
  79. GRB 130505B: MAXI/GSC detection
  80. GRB 130505A: optical observations
  81. GRB 130504C: Swift-XRT observations
  82. GRB 130504C: Fermi GBM detection
  83. GRB 130427A: optical observations in CrAO
  84. GRB 130502A: optical upper limit
  85. GRB 130505A: E_iso record retraction
  86. GRB 130427A: correction to GCN 14487
  87. GRB 130505A: correction to GCN 14575
  88. GRB 130505A: Swift-XRT refined Analysis
  89. GRB 130505A: Largest E_iso ever measured
  90. Konus-Wind observation of GRB 130505A
  91. GRB 130504C: Fermi-LAT detection of a burst
  92. Swift/UVOT observations of GRB130505A
  93. GRB 130505A: iTelescope T12 optical observations
  94. GRB 130505A: Xinglong TNT optical observations
  95. GRB 130505A; Weihai optical observations
  96. GRB 130505A: Enhanced Swift-XRT position
  97. GRB 130505A: MITSuME Okayama Optical Observation
  98. GRB 130505A - Gemini-N/GMOS redshift determination
  99. GRB 130505A: MAXI/GSC detection
  100. Konus-Wind observation of GRB 130504B

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