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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"

43888 results found.

  1. GRB111107A: ATCA observations - upper limit and a possible detection
  2. Konus-Wind observation of GRB 111113A
  3. IPN Triangulation of GRB 111113A (short/hard/intense)
  4. XRF 111111A/MAXI J0158-744: MAXI GSC refined analysis
  5. XRF 111111A/MAXI J0158-744: MAXI GSC and SSC detection of a soft X-ray transient near SMC
  6. GRB 111109A: Swift-XRT refined Analysis
  7. GRB 111109A: Swift/UVOT Photometry
  8. GRB 111109A: Swift-BAT refined analysis
  9. GRB 111109A: Enhanced Swift-XRT position
  10. GRB 111109A: Swift detection of a burst
  11. GRB 111103B: optical upper limit of CrAO
  12. GRB 111103B: optical upper limit of Mt. Terskol observatory
  13. GRB 111107A: Fermi GBM observation
  14. Continued Skynet observations of GRB111107A
  15. GRB 111107A: Swift-XRT refined Analysis
  16. GRB 111107A: VLT/X-shooter spectroscopy
  17. GRB 111107A: APEX submm observation
  18. GRB 111107A: Swift-BAT refined analysis
  19. GRB 111107A: Enhanced Swift-XRT position
  20. GRB 111107A: Gemini-South Redshift
  21. GRB 111107A: GROND observations
  22. Skynet observations of GRB 111107A
  23. GRB 111107A: Swift detection of a burst with an optical counterpart
  24. GRB 111103B: MITSuME Akeno Optical upper limits
  25. Konus-Wind observation of GRB 111103B
  26. GRB 111103B : WIYN 3.5m NIR observations
  27. GRB 111103B: Swift-XRT refined Analysis
  28. GRB 111103A: Fermi GBM observation
  29. GRB111103B Swift/UVOT Upper Limits
  30. GRB 111103B: optical observations from TAU, Ka-Dar
  31. Trigger 506913: MASTER detection of Swift J1922.7-1716 optical counterpart
  32. GRB 111103B: Enhanced Swift-XRT position
  33. GRB 111103B: Swift-BAT refined analysis
  34. GRB 111103A: Swift-BAT refined analysis
  35. Trigger 506913: Swift detection of Swift J1922.7-1716 and its optical counterpart
  36. GRB 111022B: MASTER OT observations
  37. GRB 111103B: optical observations
  38. GRB 111103B: Swift detection of a strong burst from a GRB or Galactic source
  39. GRB 111103A: Swift detection of a burst
  40. Swift-BAT trigger 506884 is not a GRB
  41. GRB 111029A: SAO RAS optical limits
  42. GRB 111029A: Super-LOTIS early limits
  43. All GCN Circulars available in a tarfile for data mining
  44. GRB 111026A: spectral lag value inconclusive for a short burst
  45. GRB 111029A: TNT optical upper limit, Correction to GCN 12503
  46. GRB 111029A: Swift-XRT refined Analysis
  47. GRB 111029A: PAIRITEL NIR Upper Limits
  48. GRB 111026A: Swift-BAT refined analysis
  49. GRB 111029A: Swift/UVOT Upper Limits
  50. GRB 111029A: KAIT optical limits
  51. GRB 111029A: Swift-BAT refined analysis
  52. GRB 111029A: TNT optical upper limit
  53. GRB 111029A: Enhanced Swift-XRT position
  54. GRB 111029A: Faulkes Telescope North observations
  55. GRB 111029A: optical upper limit
  56. GRB 111029A: ROTSE-III Optical Limits
  57. GRB 111029A: Swift detection of a burst
  58. GRB 111026A: Swift detection of a burst
  59. GRB 111022B: EVLA observations - correction to GCN 12495
  60. GRB 111022B: EVLA observations
  61. GRB 111022B: 10.4m GTC z'-band observations
  62. GRB111022B: D50 optical limit
  63. GRB 111020A: Chandra Observation
  64. GRB 111022B: BTA Optical Observations
  65. GRB 111024A: MAXI/GSC detection of a burst
  66. GRB 111022A: Swift/UVOT Upper Limits
  67. GRB 111016A: optical upper limit
  68. GRB 111022B, Swift-BAT refined analysis
  69. GRB 111022B: Swift-XRT refined Analysis
  70. GRB 111022A: RIzY Observation
  71. GRB 111022A: Swift-XRT refined Analysis
  72. GRB 111022B: Gemini infrared observations
  73. GRB 111022B: NOT observations
  74. GRB 111022B: Enhanced Swift-XRT position
  75. GRB 111020A Spectral lag analysis
  76. GRB 111022A: Swift-BAT refined analysis
  77. GRB 111022B: MASTER-Net early limit
  78. GRB 111022A: Preliminary UVOT TDRSS Non-Detection
  79. GRB 111022A: MASTER-Net early limit
  80. GRB 111022B: Swift detection of a burst
  81. GRB 111022A: Swift detection of a burst
  82. GRB 111020A: Gemini-South additional observations and limit on an optical afterglow
  83. GRB 111020A: EVLA observations
  84. GRB 111020A: Swift-XRT refined Analysis
  85. GRB 111020A: Gemini-South i-band observations
  86. GRB 111020A: Swift/UVOT Upper Limits
  87. GRB 111020A: Faulkes Telescope South observations
  88. GRB 111020A: Swift-BAT refined analysis
  89. GRB 111020A: Enhanced Swift-XRT position
  90. GRB 111020A: BOOTES-3 Optical Upper Limit.
  91. GRB 111020A: Planned XMM-Newton observation
  92. GRB 111020A: Swift detection of a short burst
  93. GRB 111018A: Swift/UVOT Upper Limits
  94. GRB 110918A: Optical light curve for days 1.4 to 16.3
  95. GRB 111018A: Swift-BAT refined analysis
  96. Konus-Wind observation of GRB 111016B
  97. GRB 111018A: Swift-XRT refined Analysis
  98. GRB 111018A: GROND Upper Limits
  99. GRB 111018A: Enhanced Swift-XRT position
  100. IPN Triangulation of GRB 111016B (long duration, intense)

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