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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"

27630 results found.

  1. Konus-Wind observation of GRB 160424A
  2. LIGO/Virgo G197392 / LVT151012: Identification of a GW CBC Candidate
  3. GRB 160424A: Fermi GBM observation
  4. GRB 160424A: Swift-BAT refined analysis
  5. GRB 160424A: Swift/UVOT Upper Limit
  6. GRB 160424A: Swift-XRT observations
  7. GRB 160424A: Swift detection of a burst
  8. GRB 160422A: Swift/UVOT Candidate Afterglow
  9. GRB 160422A: Fermi GBM observation
  10. GRB 160422A: Fermi-LAT Detection
  11. GRB 160419A, Swift-BAT refined analysis
  12. GRB 160419A: Fermi GBM detection
  13. GRB 160419A: Swift detection of a burst
  14. Fermi GBM trigger 482632364/160418023 is not a GRB
  15. GRB 160417A: GMG observations
  16. GRB 160417A: Swift-BAT refined analysis
  17. GRB 160417A: Swift/UVOT Detection
  18. GRB 160417A: Swift-XRT refined Analysis
  19. GRB 160417A: KAIT optical afterglow confirmation
  20. GRB 160417A: Swift detection of a burst with an optical counterpart
  21. LIGO/Virgo G211117: EWE for NOWT of 12 days follow-up of northern sky
  22. GRB 160412A: GROND upper limits
  23. Konus-Wind observation of GRB 160409A
  24. LIGO Virgo G211117: Additional MWA Observations
  25. GRB 160410A: TLS Tautenburg observations
  26. GRB 160412A: Swift/UVOT Upper Limits
  27. Swift Trigger 682614 is not a GRB
  28. GRB 160410A: JCMT SCUBA-2 sub-mm observation
  29. GRB 160409A: Swift-XRT observations
  30. GRB 160409A found in Swift BAT ground analysis
  31. GRB 160412A: Swift-XRT refined Analysis
  32. GRB 160411A: Swift-BAT refined analysis of the short burst
  33. GRB 160412A: Swift-BAT refined analysis
  34. GRB 160412A: Swift detection of a burst
  35. GRB 160408A: CALET Gamma-Ray Burst Monitor detection
  36. GRB 160409A: Swift ToO observations
  37. GRB 160411A: Gemini-S optical observations
  38. GRB 160411A: GROND Optical/NIR upper limits
  39. GRB 160411A: Swift/UVOT Upper Limits
  40. GRB 160411A: Fermi GBM detection
  41. Konus-Wind observation of GRB 160410A (short/hard)
  42. GRB 160410A: TAROT La Silla observatory early optical observations
  43. GRB 160411A: Swift-XRT refined Analysis
  44. GRB 160411A: MASTER-NET early optical observations.
  45. GRB 160410A: Swift-XRT refined Analysis
  46. GRB 160411A: Swift-XRT observations
  47. GRB 160410A: GMG observation
  48. GRB 160411A: Swift detection of a short burst
  49. GRB 160410A: Keck-I/LRIS redshift
  50. GRB 160410A: Skynet PROMPT-CTIO observations of the optical afterglow
  51. GRB 160410A: Swift-BAT refined analysis of the short GRB
  52. GRB 160410A: Swift/UVOT Detection
  53. GRB 160410A: GROND optical detection
  54. GRB 160410A: Swift detection of a (possibly-short) burst with an optical counterpart
  55. GRB 160408A: GMG observation limit
  56. GRB 160408A: TLS Tautenburg observations
  57. GRB 160408A: Swift/UVOT Upper Limits
  58. GRB 160408A: Swift-XRT refined Analysis
  59. GRB 160408A: Fermi GBM detection
  60. GRB 160406A: Fermi GBM observation
  61. GRB 160408A: Swift-BAT refined analysis
  62. GRB 160408A: Swift detection of a short burst
  63. IPN Triangulation of GRB 160406A (short/hard)
  64. GRB 160401A: Swift/UVOT Upper Limits
  65. GRB 160401A: Zadko observatory - Gingin optical observations
  66. GRB 160401A: LT observations
  67. GRB 160401A: MASTER-IAC prompt optical observations
  68. GRB 160327A: Continued RATIR Optical and NIR Observations
  69. LIGO/Virgo G211117: LOFAR follow-up
  70. GRB 160324A: CALET Gamma-Ray Burst Monitor detection
  71. GRB 160327A: Early RAPTOR Limits
  72. GRB 160327A: JCMT SCUBA-2 sub-mm observation
  73. Konus-Wind observation of GRB 160325A
  74. GRB 160327A: Continued RATIR Optical and NIR Observations
  75. GRB 160327A: Swift-BAT refined analysis
  76. GRB 160327A: Swift/UVOT Upper Limits
  77. GRB 160327A: Swift-XRT refined Analysis
  78. GRB 160327A: RATIR Optical and NIR Afterglow Detection
  79. GRB 160327A: Swift detection of a burst
  80. GRB 160325A, Swift-BAT refined analysis
  81. GRB 160325A: GROND Upper Limits
  82. GRB 160325A: Swift-XRT refined Analysis
  83. GRB 160325A: Further Swift/UVOT Observations
  84. GRB160325A Swift/UVOT Detection
  85. GRB 160325A: Fermi-LAT detection
  86. Swift Trigger 680457 is not a GRB
  87. LIGO/Virgo G211117: CALET GBM Observations
  88. GRB 160325A: Fermi GBM detection
  89. GRB 160325A: Swift detection of a burst
  90. Swift detects GX 301-2 in very high state
  91. Fermi Gamma-ray Burst Monitor trigger 160323546 is not a GRB
  92. GRB 160321A: Possible RATIR Optical and NIR Detections
  93. GRB 160321A: Swift/UVOT Upper Limits
  94. GRB 160321A: Swift-BAT refined analysis
  95. GRB 160321A: Swift-XRT refined Analysis
  96. GRB 160316A: CALET Gamma-Ray Burst Monitor detection
  97. GRB 160321A: MASTER observations zero Galaxy latitude GRB
  98. GRB 160321A: Swift detection of a probable burst
  99. GRB 160310A: Terskol 2-m observations
  100. IPN Triangulation of GRB 160310A

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