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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"

36380 results found.

  1. GRB 111123A, GROND observations
  2. GRB 111123A: correction to GCN 12593
  3. GRB 111123A: TNG NIR detection of the afterglow candidate
  4. GRB 111123A: Swift-XRT refined Analysis
  5. GRB 111123A: MITSuME Okayama Optical upper limits
  6. GRB 111123A: Enhanced Swift-XRT position
  7. GRB 111123A: GMG optical observation
  8. GRB 111117A: Refined Chandra Astrometry
  9. GRB 111123A: Swift detection of a burst
  10. GRB 111117A, the review of the sky area in plate archives
  11. Konus-Wind observation of GRB 111121A
  12. GRB 111121A: Swift/UVOT Upper Limits
  13. GRB 111121A: Magellan/Megacam observations
  14. GRB 111121A: Swift-XRT refined Analysis
  15. GRB 111121A: Swift-BAT refined analysis
  16. GRB 111117A: Chandra detection of the afterglow
  17. GRB 111121A: Enhanced Swift-XRT position
  18. GRB 111121A: Swift detection of a short hard burst
  19. GRB 111117A: Gemini Afterglow Limits
  20. GRB 111117A: optical upper limit in CrAO
  21. GRB 111117A: Fermi GBM observation
  22. GRB 111117A: further NOT observations
  23. GRB 111117A: EVLA observations
  24. GRB 111117A: TNG observations
  25. GRB 111117A: Swift/UVOT Upper Limits
  26. GRB 111117A: GROND observations
  27. GRB 111117A: Gemini host observation
  28. GRB111117A: Magellan IMACS observations
  29. GRB 111117A: Swift-XRT refined Analysis
  30. GRB111107A: Further ATCA observations - no detection
  31. GRB 111117A: NOT observations
  32. GRB 111117A: Chandra ToO observation scheduled
  33. GRB 111117A: Swift-BAT refined analysis of a short hard burst
  34. GRB 111117A: GMG upper limit
  35. GRB 111117A: Swift detection of a short hard burst
  36. GRB111107A: ATCA observations - upper limit and a possible detection
  37. Konus-Wind observation of GRB 111113A
  38. IPN Triangulation of GRB 111113A (short/hard/intense)
  39. GRB 111109A: Swift-XRT refined Analysis
  40. GRB 111109A: Swift/UVOT Photometry
  41. GRB 111109A: Swift-BAT refined analysis
  42. GRB 111109A: Enhanced Swift-XRT position
  43. GRB 111109A: Swift-XRT observations
  44. GRB 111109A: Swift detection of a burst
  45. GRB 111103B: optical upper limit of CrAO
  46. GRB 111103B: optical upper limit of Mt. Terskol observatory
  47. GRB 111107A: Fermi GBM observation
  48. Continued Skynet observations of GRB111107A
  49. GRB 111107A: Swift-XRT refined Analysis
  50. GRB 111107A: VLT/X-shooter spectroscopy
  51. GRB 111107A: APEX submm observation
  52. GRB 111107A: Swift/UVOT Afterglow Analysis
  53. GRB 111107A: Swift-BAT refined analysis
  54. GRB 111107A: Enhanced Swift-XRT position
  55. GRB 111107A: Gemini-South Redshift
  56. GRB 111107A: GROND observations
  57. Skynet observations of GRB 111107A
  58. GRB 111107A: Swift detection of a burst with an optical counterpart
  59. GRB 111103B: MITSuME Akeno Optical upper limits
  60. Konus-Wind observation of GRB 111103B
  61. GRB 111103B : WIYN 3.5m NIR observations
  62. GRB 111103B: Swift-XRT refined Analysis
  63. GRB 111103A: Fermi GBM observation
  64. GRB111103B Swift/UVOT Upper Limits
  65. GRB 111103B: optical observations from TAU, Ka-Dar
  66. GRB 111103B: Enhanced Swift-XRT position
  67. GRB 111103B: Swift-BAT refined analysis
  68. GRB 111103A: Swift-BAT refined analysis
  69. GRB 111022B: MASTER OT observations
  70. GRB 111103B: optical observations
  71. GRB 111103B: Swift detection of a strong burst from a GRB or Galactic source
  72. GRB 111103A: Swift detection of a burst
  73. Swift-BAT trigger 506884 is not a GRB
  74. GRB 111029A: RAPTOR Limits During the Gamma-ray Emitting Interval
  75. GRB 111029A: SAO RAS optical limits
  76. GRB 111029A: Super-LOTIS early limits
  77. All GCN Circulars available in a tarfile for data mining
  78. GRB 111026A: spectral lag value inconclusive for a short burst
  79. GRB111029A: MITSuME Ishigakijima Optical Upper Limits
  80. GRB 111029A: TNT optical upper limit, Correction to GCN 12503
  81. GRB 111029A: Swift-XRT refined Analysis
  82. GRB 111029A: PAIRITEL NIR Upper Limits
  83. GRB 111026A: Swift-BAT refined analysis
  84. GRB 111029A: Swift/UVOT Upper Limits
  85. GRB 111029A: KAIT optical limits
  86. GRB 111029A: Swift-BAT refined analysis
  87. GRB 111029A: TNT optical upper limit
  88. GRB 111029A: Enhanced Swift-XRT position
  89. GRB 111029A: Faulkes Telescope North observations
  90. GRB 111029A: optical upper limit
  91. GRB 111029A: ROTSE-III Optical Limits
  92. GRB 111029A: Swift detection of a burst
  93. GRB 111026A: Swift detection of a burst
  94. GRB 111022B: EVLA observations - correction to GCN 12495
  95. GRB 111022B: EVLA observations
  96. GRB 111022B: 10.4m GTC z'-band observations
  97. GRB111022B: D50 optical limit
  98. GRB 111020A: Chandra Observation
  99. GRB 111022B: BTA Optical Observations
  100. GRB 111022A: MITSuME Akeno Optical upper limits

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