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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"

42809 results found.

  1. GRB 111204A: Swift-XRT refined Analysis
  2. GRB 111204A, Swift-BAT refined analysis
  3. GRB 111022B: CrAO optical limit
  4. GRB 110921A: optical observations in Maidanak observatory
  5. GRB 111204A: MASTER optical observations
  6. GRB 111123A: optical upper limit in CrAO: correction to the GCN circ. 12613
  7. GRB 111204A: Enhanced Swift-XRT position
  8. GRB 111123A: optical upper limit in CrAO
  9. GRB 111204A: Swift detection of a burst
  10. GRB 111201A: Confirmation of the X-ray afterglow
  11. GRB111201A: Swift-XRT observations
  12. GRB 111201A found in ground analysis of BAT data
  13. GRB 111121A: Suzaku WAM observation of the prompt emission
  14. GRB 111129A: Swift/UVOT Detection
  15. GRB 111129A, GROND afterglow observations
  16. GRB 111129A: Swift-XRT refined Analysis
  17. GRB 111129A: Swift-BAT refined analysis
  18. GRB 111129A: Enhanced Swift-XRT position
  19. GRB 111129A: Swift detection of a burst with an optical counterpart
  20. GRB 111126A found in ground analysis of BAT data
  21. GRB 111123A, Swift-BAT refined analysis
  22. GRB 111123A: Swift/UVOT Upper Limits
  23. GRB 111123A - NOT optical observations
  24. GRB 111123A, GROND observations
  25. GRB 111123A: correction to GCN 12593
  26. GRB 111123A: TNG NIR detection of the afterglow candidate
  27. GRB 111123A: Swift-XRT refined Analysis
  28. GRB 111123A: Enhanced Swift-XRT position
  29. GRB 111123A: GMG optical observation
  30. GRB 111117A: Refined Chandra Astrometry
  31. GRB 111123A: Swift detection of a burst
  32. Konus-Wind observation of GRB 111121A
  33. GRB 111121A: Swift/UVOT Upper Limits
  34. GRB 111121A: Magellan/Megacam observations
  35. GRB 111121A: Swift-XRT refined Analysis
  36. GRB 111121A: Swift-BAT refined analysis
  37. GRB 111117A: Chandra detection of the afterglow
  38. GRB 111121A: Enhanced Swift-XRT position
  39. GRB 111121A: Swift detection of a short hard burst
  40. GRB 111117A: Gemini Afterglow Limits
  41. GRB 111117A: optical upper limit in CrAO
  42. GRB 111117A: Fermi GBM observation
  43. GRB 111117A: further NOT observations
  44. GRB 111117A: EVLA observations
  45. GRB 111117A: TNG observations
  46. GRB 111117A: GROND observations
  47. GRB 111117A: Gemini host observation
  48. GRB111117A: Magellan IMACS observations
  49. GRB 111117A: Swift-XRT refined Analysis
  50. GRB111107A: Further ATCA observations - no detection
  51. GRB 111117A: NOT observations
  52. GRB 111117A: Chandra ToO observation scheduled
  53. GRB 111117A: Swift-BAT refined analysis of a short hard burst
  54. GRB 111117A: GMG upper limit
  55. GRB 111117A: Swift detection of a short hard burst
  56. GRB111107A: ATCA observations - upper limit and a possible detection
  57. Konus-Wind observation of GRB 111113A
  58. IPN Triangulation of GRB 111113A (short/hard/intense)
  59. XRF 111111A/MAXI J0158-744: MAXI GSC refined analysis
  60. XRF 111111A/MAXI J0158-744: MAXI GSC and SSC detection of a soft X-ray transient near SMC
  61. GRB 111109A: Swift-XRT refined Analysis
  62. GRB 111109A: Swift/UVOT Photometry
  63. GRB 111109A: Swift-BAT refined analysis
  64. GRB 111109A: Enhanced Swift-XRT position
  65. GRB 111109A: Swift detection of a burst
  66. GRB 111103B: optical upper limit of CrAO
  67. GRB 111103B: optical upper limit of Mt. Terskol observatory
  68. GRB 111107A: Fermi GBM observation
  69. Continued Skynet observations of GRB111107A
  70. GRB 111107A: Swift-XRT refined Analysis
  71. GRB 111107A: VLT/X-shooter spectroscopy
  72. GRB 111107A: APEX submm observation
  73. GRB 111107A: Swift-BAT refined analysis
  74. GRB 111107A: Enhanced Swift-XRT position
  75. GRB 111107A: Gemini-South Redshift
  76. GRB 111107A: GROND observations
  77. Skynet observations of GRB 111107A
  78. GRB 111107A: Swift detection of a burst with an optical counterpart
  79. Konus-Wind observation of GRB 111103B
  80. GRB 111103B : WIYN 3.5m NIR observations
  81. GRB 111103B: Swift-XRT refined Analysis
  82. GRB 111103A: Fermi GBM observation
  83. GRB111103B Swift/UVOT Upper Limits
  84. Trigger 506913: MASTER detection of Swift J1922.7-1716 optical counterpart
  85. GRB 111103B: Enhanced Swift-XRT position
  86. GRB 111103B: Swift-BAT refined analysis
  87. GRB 111103A: Swift-BAT refined analysis
  88. Trigger 506913: Swift detection of Swift J1922.7-1716 and its optical counterpart
  89. GRB 111022B: MASTER OT observations
  90. GRB 111103B: optical observations
  91. GRB 111103B: Swift detection of a strong burst from a GRB or Galactic source
  92. GRB 111103A: Swift detection of a burst
  93. Swift-BAT trigger 506884 is not a GRB
  94. GRB 111029A: SAO RAS optical limits
  95. GRB 111029A: Super-LOTIS early limits
  96. All GCN Circulars available in a tarfile for data mining
  97. GRB 111026A: spectral lag value inconclusive for a short burst
  98. GRB 111029A: TNT optical upper limit, Correction to GCN 12503
  99. GRB 111029A: Swift-XRT refined Analysis
  100. GRB 111029A: PAIRITEL NIR Upper Limits

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