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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"

26370 results found.

  1. GRB 111121A: Swift-BAT refined analysis
  2. GRB 111117A: Chandra detection of the afterglow
  3. GRB 111121A: Enhanced Swift-XRT position
  4. GRB 111121A: Swift detection of a short hard burst
  5. GRB 111117A: Fermi GBM observation
  6. GRB 111117A: TNG observations
  7. GRB 111117A: GROND observations
  8. GRB 111117A: Gemini host observation
  9. GRB111117A: Magellan IMACS observations
  10. GRB 111117A: Chandra ToO observation scheduled
  11. GRB 111117A: Swift-BAT refined analysis of a short hard burst
  12. GRB 111117A: Swift detection of a short hard burst
  13. GRB111107A: ATCA observations - upper limit and a possible detection
  14. Konus-Wind observation of GRB 111113A
  15. IPN Triangulation of GRB 111113A (short/hard/intense)
  16. XRF 111111A/MAXI J0158-744: MAXI GSC refined analysis
  17. XRF 111111A/MAXI J0158-744: MAXI GSC and SSC detection of a soft X-ray transient near SMC
  18. GRB 111109A: Swift-XRT refined Analysis
  19. GRB 111109A: Swift-BAT refined analysis
  20. GRB 111109A: Enhanced Swift-XRT position
  21. GRB 111109A: Swift detection of a burst
  22. GRB 111107A: Fermi GBM observation
  23. GRB 111107A: Swift-XRT refined Analysis
  24. GRB 111107A: VLT/X-shooter spectroscopy
  25. GRB 111107A: Swift-BAT refined analysis
  26. GRB 111107A: Enhanced Swift-XRT position
  27. GRB 111107A: GROND observations
  28. GRB 111107A: Swift detection of a burst with an optical counterpart
  29. Konus-Wind observation of GRB 111103B
  30. GRB 111103B: Swift-XRT refined Analysis
  31. GRB 111103A: Fermi GBM observation
  32. GRB 111103B: optical observations from TAU, Ka-Dar
  33. Trigger 506913: MASTER detection of Swift J1922.7-1716 optical counterpart
  34. GRB 111103B: Enhanced Swift-XRT position
  35. GRB 111103B: Swift-BAT refined analysis
  36. GRB 111103A: Swift-BAT refined analysis
  37. Trigger 506913: Swift detection of Swift J1922.7-1716 and its optical counterpart
  38. GRB 111103B: Swift detection of a strong burst from a GRB or Galactic source
  39. GRB 111103A: Swift detection of a burst
  40. GRB 111029A: RAPTOR Limits During the Gamma-ray Emitting Interval
  41. GRB 111029A: Swift-XRT refined Analysis
  42. GRB 111026A: Swift-BAT refined analysis
  43. GRB 111029A: Swift-BAT refined analysis
  44. GRB 111029A: Enhanced Swift-XRT position
  45. GRB 111029A: Swift detection of a burst
  46. GRB 111026A: Swift detection of a burst
  47. GRB111022B: D50 optical limit
  48. GRB 111020A: Chandra Observation
  49. GRB 111022A: Swift/UVOT Upper Limits
  50. GRB 111022B, Swift-BAT refined analysis
  51. GRB 111022B: Swift-XRT refined Analysis
  52. GRB 111022B: Enhanced Swift-XRT position
  53. GRB 111020A Spectral lag analysis
  54. GRB 111022A: Swift-BAT refined analysis
  55. GRB 111022B: MASTER-Net early limit
  56. GRB 111022B: Swift detection of a burst
  57. GRB 111022A: Swift detection of a burst
  58. GRB 111020A: Swift-XRT refined Analysis
  59. GRB 111020A: Swift/UVOT Upper Limits
  60. GRB 111020A: Swift-BAT refined analysis
  61. GRB 111020A: Enhanced Swift-XRT position
  62. GRB 111020A: BOOTES-3 Optical Upper Limit.
  63. GRB 111020A: Planned XMM-Newton observation
  64. GRB 111020A: Swift detection of a short burst
  65. GRB 110918A: Optical light curve for days 1.4 to 16.3
  66. GRB 111018A: Swift-BAT refined analysis
  67. Konus-Wind observation of GRB 111016B
  68. GRB 111018A: Swift-XRT refined Analysis
  69. GRB 111018A: GROND Upper Limits
  70. GRB 111018A: Enhanced Swift-XRT position
  71. IPN Triangulation of GRB 111016B (long duration, intense)
  72. GRB 111018A: Swift detection of a burst
  73. GRB 111017A: Fermi GBM Detection
  74. GRB111016A: D50 optical limit
  75. GRB 111016A: Swift/UVOT Detection of a Source
  76. GRB 111016A: Swift-BAT refined analysis
  77. GRB 111016A: Swift-XRT refined Analysis
  78. GRB 111016A: Enhanced Swift-XRT position
  79. GRB 111016A: Swift detection of a burst
  80. GRB 110921A: optical observations
  81. GRB 111008A : miniTAO/ANIR NIR observations
  82. GRB 111005A: ATCA 18 GHz decay
  83. GRB 111008A: Swift/UVOT Upper Limits
  84. Konus-Wind observation of GRB 111008A
  85. GRB 111008A: IAC80 I-band observations
  86. GRB 111008A: VLT/X-shooter spectroscopy
  87. GRB 111008A: Swift-XRT refined Analysis
  88. GRB 111008A: Enhanced Swift-XRT position
  89. GRB 111008A, Swift-BAT refined analysis,
  90. GRB 111008A: Swift detection of a burst
  91. GRB 111005A: ATCA 18 GHz detection
  92. GRB 111005A: ATCA radio upper limit
  93. GRB 111005A : miniTAO/ANIR NIR observations
  94. GRB 111005A: GROND NIR observations
  95. GRB 111005A: Swift-BAT refined analysis
  96. GRB 111005A: Swift detection of a burst
  97. GRB 111003A: Fermi GBM detection
  98. GRB 110928A: Swift-XRT refined Analysis
  99. GRB 110825A: GROND Observations
  100. GRB 110928A: Enhanced Swift-XRT position

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