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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"

42810 results found.

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

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