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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"

19644 results found.

  1. GRB 110201A: Swift-BAT refined analysis
  2. GRB 110201A: MASTER optical observations
  3. GRB 110201A: Swift detection of a burst
  4. GRB 110128A, Swift-BAT refined analysis
  5. GRB 110128A: Swift/UVOT observations
  6. GRB 110128A: Swift-XRT refined Analysis
  7. GRB 110128A: Enhanced Swift-XRT position
  8. GRB 110128A: TAROT Calern observatory upper limits
  9. GRB 110128A: Swift detection of a burst
  10. GRB 110106B, radio observations
  11. IPN triangulation of GRB 110120A
  12. GRB 110106A: CrAO optical observations
  13. GRB 110119A: Fermi GBM detection
  14. GRB 110119A: Suzaku WAM observation of the prompt emission
  15. GRB 110112A: optical upper limit
  16. GRB110119: Swift/UVOT Detection
  17. GRB 110119A: Swift-XRT refined Analysis
  18. GRB 110119A: Swift-BAT refined analysis
  19. GRB 110119A: PAIRITEL NIR Afterglow Detection
  20. GRB 110119A: Enhanced Swift-XRT position
  21. GRB 110119A: Swift detection of a burst with an optical detection
  22. GRB 101219B: GROND detection of a SN signature
  23. Swift-BAT trigger 442771 is a noise fluctuation
  24. GRB 101219B: correction
  25. GRB 101219B: Likely the GRB host emission dominates now in the uvw2 filter
  26. New feature in Fermi GBM GRB Ground Position Notices
  27. Swift-BAT Trigger 442539 is not a GRB
  28. Swift Trigger 442539 is probably not a GRB
  29. GRB 110112B: Swift XRT and UVOT observations of the INTEGRAL burst
  30. GRB 110107A: Swift-XRT afterglow confirmation
  31. GRB 110112A: Swift-XRT refined Analysis
  32. GRB 110112A: Swift/UVOT upper limits
  33. GRB 110112A: MASTER optical observations
  34. GRB 110112A: Swift-BAT refined analysis
  35. GRB 110112A: Enhanced Swift-XRT position
  36. GRB 110112A: Swift detection of a possible short burst
  37. GRB 110107A: Swift/UVOT upper limits
  38. GRB 101225a
  39. GRB 110107A: Swift-XRT Afterglow Candidate
  40. GRB 110107A: Swift-BAT refined analysis
  41. GRB 110107A detected in ground analysis of BAT slew data
  42. GRB 110106B: Fermi GBM detection
  43. GRB 110106B: Swift-XRT refined Analysis
  44. GRB 110106B: Swift-BAT refined analysis
  45. GRB 110106B: Enhanced Swift-XRT position
  46. GRB 110106A: Swift/UVOT Upper Limits
  47. GRB 110106A: Swift-XRT refined Analysis
  48. GRB 110106A: Swift-BAT refined analysis
  49. GRB 110106A: Enhanced Swift-XRT position
  50. GRB 110106B: Swift detection of a burst
  51. GRB 110106A: MASTER optical observations
  52. GRB 110106A: Swift detection of a burst
  53. GRB 110102A: Swift-XRT refined Analysis
  54. GRB 101219B: After 2 weeks still detected by Swift/UVOT
  55. Konus-Wind observation of GRB 110102A
  56. GRB110102A: Swift/UVOT observations
  57. GRB 110102A: Fermi GBM observation
  58. GRB 110102A: Swift-BAT refined analysis
  59. GRB 110102A: Enhanced Swift-XRT position
  60. GRB 110102A: Swift detection of a burst with an optical detection
  61. GRB 101225A: MAXI/GSC observations
  62. GRB 101225A Late-time emission observed by Swift-BAT
  63. Tentative redshift of GRB101225A (Christmas's burst) from Swift-XRT data
  64. GRB 101225A, Swift-BAT refined analysis
  65. GRB 101225A: Swift/UVOT Detection
  66. GRB 101225A: Swift-XRT refined Analysis
  67. GRB 101225A: Enhanced Swift-XRT position
  68. Trigger 441015 / GRB 101225A: NOT optical afterglow candidate
  69. GRB 101225A (Swift trigger 441015): optical upper limit
  70. Trigger 441015: Swift detection of a possible burst or transient
  71. GRB 101224A: Swift/UVOT Upper Limits
  72. GRB 101224A: Fermi GBM observation
  73. GRB 101224A: Swift-XRT refined Analysis
  74. GRB 101224A, Swift-BAT refined analysis
  75. GRB 101224A - UVOT-enhanced XRT position
  76. GRB 101224A: Swift detection of a short burst
  77. GRB 101219B: Swift/UVOT refined analysis
  78. GRB 101219B: Swift-XRT refined Analysis
  79. GRB 101219B: Enhanced Swift-XRT position
  80. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  81. GRB 101219B: Fermi GBM observation
  82. GRB 101219B: Swift-BAT refined analysis
  83. GRB 101219A: Swift-XRT refined Analysis
  84. GRB 101219B: Swift detection of a burst with an optical afterglow
  85. GRB 101219A: Swift/UVOT Upper Limits
  86. GRB 101219A: GROND Upper limits
  87. Konus-Wind observation of short hard GRB 101219A
  88. GRB 101219A: Swift-BAT refined analysis
  89. GRB 101219A: ROTSE-III Optical Limits
  90. GRB 101219A: Swift detection of a short hard burst
  91. GRB 101213A : Suzaku WAM observation of the prompt emission
  92. Redshift solution(s) for GRB101213A from Swift-XRT data
  93. Konus-Wind observation of GRB 101213A
  94. GRB 101213A: Fermi GBM observation
  95. GRB 101213A, Swift-BAT refined analysis
  96. GRB 101213A: Swift-XRT refined Analysis
  97. GRB 101213A: Swift/UVOT Upper Limits
  98. GRB 101213A: Enhanced Swift-XRT position
  99. GRB 101213A: Swift detection of a burst
  100. GRB101204A: Swift/UVOT observations

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