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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"

23729 results found.

  1. GRB 110918A: submm observations from APEX
  2. GRB 110921A: optical observations in Mt. Terskol and Maidanak observatories
  3. GRB 110921A: MITSuME Akeno Optical Observation
  4. GRB 110921A: MASTER-Net early limit
  5. GRB 110921A: Swift detection of a burst
  6. GRB 110918A: Swift/UVOT Detection of the Optical Counterpart
  7. GRB 110918A optical observation
  8. GRB 110918A: Swift-XRT observations
  9. Konus-Wind observation of GRB 110918A
  10. GRB110918A: BOOTES-1 optical limit
  11. MAXI/GSC detection of a short soft X-ray transient
  12. GRB 110915A: Konus-Wind and Swift/BAT joint spectral analysis
  13. IPN triangulation of GRB 110918A (long duration, extremely intense)
  14. GRB 110915B: GROND Observations of the Optical/NIR Afterglow Candidate
  15. GRB 110915A, Swift-BAT refined analysis
  16. GRB 110915A: Deep Near-IR Limits from Magellan
  17. GRB 110903A: Suzaku WAM observation of the prompt emission
  18. GRB110915A MITSuME Okayama J-band upper-limit
  19. GRB 110915A: MITSuME Okayama and Ishigakijima Optical upper limits
  20. GRB 110915B: SuperAGILE localization of a long GRB
  21. GRB 110915A: GMG optical upper limit
  22. GRB 110915A: MITSuME Akeno Optical upper limits
  23. GRB 110915A: MASTER-Net early limit
  24. GRB 110915A: Swift detection of a burst
  25. GRB 110825A: Further Swift/XRT Observations
  26. GRB 110731A: SAO RAS and Terskol observations
  27. MAXI J1836-194 (originally GRB 110905A): Swift-BAT refined analysis
  28. GRB 110905A / X-ray transient MAXI J1836-194: TNT optical observation
  29. GRB 110905A: KAIT observations
  30. Konus-Wind observation of GRB 110903A
  31. Trigger 502024: Swift detection of KS 1741-293
  32. SGR Swift J1834.9-0846: Swift-BAT refined analysis of trigger 501752
  33. Swift detection of an SGR burst from Swift J1834.9-0846
  34. GRB 110825A: Suzaku WAM observation of the prompt emission
  35. GRB 110825A: GMG optical observation
  36. GRB 110827A, Swift-BAT refined analysis
  37. GRB 110827A: Swift detection of a burst
  38. IPN triangulation of GRB110825A (very intense, long-duration)
  39. GRB 110820A, the review of the sky area in plate archives
  40. Swift-BAT Trigger 501485 is noise
  41. Swift-BAT refined analysis of SFXT IGR J08408-4503 (trigger 501368)
  42. Konus-Wind observation of GRB 110820B
  43. GRB 110820A: MASTER-NET first hour observations
  44. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  45. GRB110820A: MITSuME Ishigakijima Optical Upper Limits
  46. GRB 110820A: Swift-BAT refined analysis
  47. GRB 110820A: MASTER-NET observations
  48. GRB 110820A: Swift detection of a burst
  49. GRB 110818A: Fermi GBM observation
  50. GRB 110818A: Optical afterglow and redshift from VLT/X-shooter
  51. GRB 110818A, Swift-BAT refined analysis
  52. GRB 110815A : Suzaku WAM observation of the prompt emission
  53. GRB 110818A: Swift detection of a burst
  54. Konus-Wind observation of GRB 110815A
  55. IPN triangulation of GRB110815A (long, intense)
  56. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  57. GRB 110801A: optical observations at Mt. Terskol observatory
  58. GRB 110812A: SuperAGILE localization of a long GRB.
  59. Konus-Wind observation of GRB 110808B
  60. Konus-Wind observation of GRB 110808A
  61. IPN triangulation of GRB 110808B (short/hard/intense)
  62. Swift Trigger 458942 is probably not a burst
  63. GRB 110808A: Swift-BAT refined analysis
  64. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  65. GRB 110808A: Swift detection of a burst with optical counterpart
  66. GRB 110807A: SAO RAS observations
  67. GRB 110807A: Swift detection of a burst or a posible new SGR
  68. Fermi Gamma-ray Burst Monitor trigger 110806.263 is not a GRB
  69. GRB 110726A: two epochs of SAO RAS optical observations
  70. Konus-Wind observation of GRB 110802A
  71. IPN triangulation of GRB110802A (short/hard burst)
  72. GRB 110731A : Suzaku WAM observation of the prompt emission
  73. GRB 110801A: SAO RAS optical observations
  74. GRB110801A: MITSuME Ishigakijima Optical Observation at 1 day after the burst
  75. GRB 110801A: Evidence for a jet break
  76. GRB 110801A: MASTER OT observations
  77. GRB 110801A: Swift-BAT refined analysis
  78. Swift/UVOT observations of GRB110801A
  79. GRB 110801A: Swift-XRT refined Analysis
  80. GRB110801A: MITSuME Ishigakijima Optical Observation
  81. GRB 110801A: TLS Optical afterglow confirmation
  82. GRB 110801A: Swift detection of a burst with an optical counterpart
  83. GRB110731A: MITSuME Ishigakijima Optical Upper Limits
  84. GRB 110731A: Swift-XRT refined Analysis
  85. Konus-Wind observation of GRB 110731A
  86. GRB 110731A: Fermi GBM observation
  87. GRB 110731A: NOT photometry
  88. GRB 110731A: Swift-BAT refined analysis
  89. GRB 110731A: Swift detection of a burst with an optical counterpart
  90. AXP 4U 0142+61: Swift-BAT refined analysis
  91. Swift detection of a SGR-like burst from the AXP 4U 0142+61
  92. GRB110726A: MITSuME Ishigakijima Optical Observation
  93. GRB 110726A: Swift-BAT refined analysis
  94. GRB 110726A: Liverpool Telescope observations
  95. GRB 110726A: Swift detection of a burst
  96. IPN triangulation of GRB 110721A
  97. GRB 110721A: Gemini-South spectroscopy of the potential optical counterpart
  98. GRB 110721A: potential counterpart candidate
  99. Konus-Wind observation of GRB 110721A
  100. GRB 110715A : Suzaku WAM observation of the prompt emission

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