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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"

19611 results found.

  1. GRB 110112A: Swift-BAT refined analysis
  2. GRB 110112A: Enhanced Swift-XRT position
  3. GRB 110112A: Swift detection of a possible short burst
  4. GRB 110107A: Swift/UVOT upper limits
  5. GRB 101225a
  6. GRB 110107A: Swift-XRT Afterglow Candidate
  7. GRB 110107A: Swift-BAT refined analysis
  8. GRB 110107A detected in ground analysis of BAT slew data
  9. GRB 110106B: Fermi GBM detection
  10. GRB 110106B: Swift-XRT refined Analysis
  11. GRB 110106B: Swift-BAT refined analysis
  12. GRB 110106B: Enhanced Swift-XRT position
  13. GRB 110106A: Swift/UVOT Upper Limits
  14. GRB 110106A: Swift-XRT refined Analysis
  15. GRB 110106A: Swift-BAT refined analysis
  16. GRB 110106A: Enhanced Swift-XRT position
  17. GRB 110106B: Swift detection of a burst
  18. GRB 110106A: MASTER optical observations
  19. GRB 110106A: Swift detection of a burst
  20. GRB 110102A: Swift-XRT refined Analysis
  21. GRB 101219B: After 2 weeks still detected by Swift/UVOT
  22. Konus-Wind observation of GRB 110102A
  23. GRB110102A: Swift/UVOT observations
  24. GRB 110102A: Fermi GBM observation
  25. GRB 110102A: Swift-BAT refined analysis
  26. GRB 110102A: Enhanced Swift-XRT position
  27. GRB 110102A: Swift detection of a burst with an optical detection
  28. GRB 101225A: MAXI/GSC observations
  29. GRB 101225A Late-time emission observed by Swift-BAT
  30. Tentative redshift of GRB101225A (Christmas's burst) from Swift-XRT data
  31. GRB 101225A, Swift-BAT refined analysis
  32. GRB 101225A: Swift/UVOT Detection
  33. GRB 101225A: Swift-XRT refined Analysis
  34. GRB 101225A: Enhanced Swift-XRT position
  35. Trigger 441015 / GRB 101225A: NOT optical afterglow candidate
  36. GRB 101225A (Swift trigger 441015): optical upper limit
  37. Trigger 441015: Swift detection of a possible burst or transient
  38. GRB 101224A: Swift/UVOT Upper Limits
  39. GRB 101224A: Fermi GBM observation
  40. GRB 101224A: Swift-XRT refined Analysis
  41. GRB 101224A, Swift-BAT refined analysis
  42. GRB 101224A - UVOT-enhanced XRT position
  43. GRB 101224A: Swift detection of a short burst
  44. GRB 101219B: Swift/UVOT refined analysis
  45. GRB 101219B: Swift-XRT refined Analysis
  46. GRB 101219B: Enhanced Swift-XRT position
  47. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  48. GRB 101219B: Fermi GBM observation
  49. GRB 101219B: Swift-BAT refined analysis
  50. GRB 101219A: Swift-XRT refined Analysis
  51. GRB 101219B: Swift detection of a burst with an optical afterglow
  52. GRB 101219A: Swift/UVOT Upper Limits
  53. GRB 101219A: GROND Upper limits
  54. Konus-Wind observation of short hard GRB 101219A
  55. GRB 101219A: Swift-BAT refined analysis
  56. GRB 101219A: ROTSE-III Optical Limits
  57. GRB 101219A: Swift detection of a short hard burst
  58. GRB 101213A : Suzaku WAM observation of the prompt emission
  59. Redshift solution(s) for GRB101213A from Swift-XRT data
  60. Konus-Wind observation of GRB 101213A
  61. GRB 101213A: Fermi GBM observation
  62. GRB 101213A, Swift-BAT refined analysis
  63. GRB 101213A: Swift-XRT refined Analysis
  64. GRB 101213A: Swift/UVOT Upper Limits
  65. GRB 101213A: Enhanced Swift-XRT position
  66. GRB 101213A: Swift detection of a burst
  67. GRB101204A: Swift/UVOT observations
  68. GRB 101204A: Swift-XRT refined Analysis
  69. GRB101204A GROND Detection of the Optical/NIR Afterglow
  70. GRB 101204A Afterglow Candidate, VATT Observations
  71. GRB 101129A : Suzaku WAM observation of the prompt emission
  72. GRB 101204A Swift-XRT/UVOT afterglow candidate
  73. GRB 101204A detected in ground analysis of BAT data
  74. GRB 101129A SHB found by IPN and in ground analysis of BAT data
  75. GRB 101201A: Fermi GBM observation
  76. GRB 101201A: Swift-XRT refined Analysis
  77. GRB 101201A: Swift/UVOT Detection
  78. GRB 101201A: GROND Detection of the Optical/NIR Afterglow
  79. GRB 101201A detected in ground analysis of BAT data
  80. Swift detection of MAXIJ1409-619
  81. IPN triangulation of bright GRB 101123A
  82. Optical observation of GRB 101024A
  83. GRB 101117B: GROND Upper limits
  84. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  85. GRB 101117B: Swift-XRT refined analysis
  86. GRB101114A: Swift/UVOT Upper Limits
  87. GRB 101114A: Confirmation of the X-ray afterglow
  88. GRB 101117B: Swift-BAT refined analysis
  89. GRB 101117B: Enhanced Swift-XRT position
  90. GRB 101117B: Swift/UVOT Discovery of an Optical Afterglow
  91. GRB 101117B: Swift detection of a burst
  92. GRB 101114A: GROND Upper limits
  93. GRB 101114A: Swift-XRT candidate afterglow detection and analysis
  94. GRB 101114A, Swift-BAT GRB detected by ground processing
  95. GRB 101112A - XRT source detection/analysis
  96. GRB 101030A : MOA optical observation
  97. GRB 101030A : Swift XRT refined analysis
  98. GRB 101030A: Swift/UVOT Upper Limits
  99. GRB 101030A: Swift-BAT refined analysis
  100. GRB 101030A: Enhanced Swift-XRT position

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