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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"

27220 results found.

  1. GRB 160410A: Keck-I/LRIS redshift
  2. GRB 160410A: Skynet PROMPT-CTIO observations of the optical afterglow
  3. GRB 160410A: Swift-BAT refined analysis of the short GRB
  4. GRB 160410A: Swift/UVOT Detection
  5. GRB 160410A: GROND optical detection
  6. GRB 160410A: Swift detection of a (possibly-short) burst with an optical counterpart
  7. GRB 160408A: GMG observation limit
  8. GRB 160408A: TLS Tautenburg observations
  9. GRB 160408A: Swift/UVOT Upper Limits
  10. GRB 160408A: Swift-XRT refined Analysis
  11. GRB 160408A: Fermi GBM detection
  12. GRB 160406A: Fermi GBM observation
  13. GRB 160408A: Swift-BAT refined analysis
  14. GRB 160408A: Swift detection of a short burst
  15. IPN Triangulation of GRB 160406A (short/hard)
  16. GRB 160401A: Swift/UVOT Upper Limits
  17. GRB 160401A: Zadko observatory - Gingin optical observations
  18. GRB 160401A: LT observations
  19. GRB 160401A: MASTER-IAC prompt optical observations
  20. GRB 160327A: Continued RATIR Optical and NIR Observations
  21. LIGO/Virgo G211117: LOFAR follow-up
  22. GRB 160324A: CALET Gamma-Ray Burst Monitor detection
  23. GRB 160327A: Early RAPTOR Limits
  24. GRB 160327A: JCMT SCUBA-2 sub-mm observation
  25. Konus-Wind observation of GRB 160325A
  26. GRB 160327A: Continued RATIR Optical and NIR Observations
  27. GRB 160327A: Swift-BAT refined analysis
  28. GRB 160327A: Swift/UVOT Upper Limits
  29. GRB 160327A: Swift-XRT refined Analysis
  30. GRB 160327A: RATIR Optical and NIR Afterglow Detection
  31. GRB 160327A: Swift detection of a burst
  32. GRB 160325A, Swift-BAT refined analysis
  33. GRB 160325A: GROND Upper Limits
  34. GRB 160325A: Swift-XRT refined Analysis
  35. GRB 160325A: Further Swift/UVOT Observations
  36. GRB160325A Swift/UVOT Detection
  37. GRB 160325A: Fermi-LAT detection
  38. Swift Trigger 680457 is not a GRB
  39. LIGO/Virgo G211117: CALET GBM Observations
  40. GRB 160325A: Fermi GBM detection
  41. GRB 160325A: Swift detection of a burst
  42. Swift detects GX 301-2 in very high state
  43. Fermi Gamma-ray Burst Monitor trigger 160323546 is not a GRB
  44. GRB 160321A: Possible RATIR Optical and NIR Detections
  45. GRB 160321A: Swift/UVOT Upper Limits
  46. GRB 160321A: Swift-BAT refined analysis
  47. GRB 160321A: Swift-XRT refined Analysis
  48. GRB 160316A: CALET Gamma-Ray Burst Monitor detection
  49. GRB 160321A: MASTER observations zero Galaxy latitude GRB
  50. GRB 160321A: Swift detection of a probable burst
  51. GRB 160310A: Terskol 2-m observations
  52. LIGO/Virgo G211117: EWE for NOWT follow-up of northern sky
  53. SGR 0755-2933, Swift-BAT refined analysis
  54. Swift detection of a likely new SGR: SGR 0755-2933
  55. GRB 160314A: Continued RATIR Optical and NIR Observations
  56. GRB 160314A: GROND optical/NIR observations
  57. GRB 160314B: Fermi GBM observation
  58. GRB 160314B: Fermi-LAT detection
  59. GRB 160314A: RATIR Optical and NIR Observations
  60. GRB 160313A: Swift/UVOT Upper Limits
  61. LIGO/Virgo G194575: EWE for NOWT follow-up of northern sky
  62. GRB 160314A: VLT/X-shooter redshift
  63. GRB 160314A: Swift-XRT refined Analysis
  64. GRB 160314A: Swift-BAT refined analysis
  65. GRB 160314A: Swift/UVOT Detection
  66. GRB 160228A: GROND afterglow confirmation and X-shooter host candidate redshift
  67. GRB 160314A: Swift detection of a burst
  68. GRB 160313A, Swift-BAT refined analysis
  69. Fermi GBM trigger 479509107/160312874 is not a GRB
  70. GRB 160313A: Chante-Perdrix Observatory optical observations
  71. GRB 160313A: MASTER-Net optical observations
  72. GRB 160313A: LT observations
  73. GRB 160313A: Swift-XRT refined Analysis
  74. GRB 160313A: TAROT Calern observatory optical observations
  75. GRB 160313A: RATIR Optical and NIR Observations
  76. GRB 160313A: SAO RAS observations
  77. GRB 160313A: Swift detection of a burst
  78. GRB 160310A: MASTER-Kislovods observations
  79. GRB 160310A: Further NOT observations
  80. GRB 160310A: Swift/UVOT Upper Limits
  81. GRB 160310A: RATIR Optical and NIR Observations
  82. GRB 160307A: CALET Gamma-Ray Burst Monitor detection of a possible short GRB
  83. GRB 160310A: NOT optical observations
  84. GRB 160310A: Fermi GBM observation
  85. GRB 160310A: Fermi-LAT detection
  86. Swift Trigger 678197 is a noise fluctuation
  87. LIGO/Virgo G211117: HAWC follow-up of northern sky
  88. Trigger 677981: Swift detection of IGRJ17091-3624
  89. Swift trigger 677890 is noise
  90. GRB 160303A: JCMT SCUBA-2 sub-mm observation
  91. GRB160303A: further GROND observations
  92. GRB 160303A, Swift-BAT refined analysis
  93. GRB 160303A: Continued RATIR Optical and NIR Observations
  94. GRB 160303A: GROND Optical Detection
  95. GRB 160303A: VLT/FORS2 afterglow obervations
  96. GRB 160303A iTelescope observation
  97. GRB 160303A: Swift-XRT refined Analysis
  98. Swift possibly triggered on IGR17091-3624
  99. GRB 160303A: Swift/UVOT Detection
  100. GRB 160303A: RAPTOR Observations During Gamma-Ray Emitting Interval

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