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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"

19662 results found.

  1. GRB 110206A: Swift detection of a probable X-ray afterglow
  2. GRB 110205A: Lightbuckets Optical Observations
  3. GRB 110205A: Swift/UVOT Continuing Observations
  4. Observations GRB 110205A
  5. GRB 110205A: Swift-BAT refined analysis
  6. GRB 110205A: Newcastle Observatory Optical Observations
  7. GRB 110205A: Swift-XRT refined Analysis
  8. GRB 110205A: optical flare confirmation
  9. GRB 110205A: Enhanced Swift-XRT position
  10. GRB 110205A: PAIRITEL NIR Afterglow Detection
  11. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  12. GRB 110205A: Liverpool Telescope Afterglow Confirmation
  13. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  14. GRB 110205A: TAROT Calern observatory optical detection
  15. GRB 110205A: Swift detection of a burst with an optical candidate
  16. GRB 110128A: Fermi GBM detection
  17. GRB 110201A: Swift-XRT refined Analysis
  18. Swift/UVOT observations of GRB110201A
  19. GRB 110201A: Swift-BAT refined analysis
  20. GRB 110201A: MASTER optical observations
  21. GRB 110201A: Swift detection of a burst
  22. GRB 110128A, Swift-BAT refined analysis
  23. GRB 110128A: Swift/UVOT observations
  24. GRB 110128A: Swift-XRT refined Analysis
  25. GRB 110128A: Enhanced Swift-XRT position
  26. GRB 110128A: TAROT Calern observatory upper limits
  27. GRB 110128A: Swift detection of a burst
  28. GRB 110106B, radio observations
  29. IPN triangulation of GRB 110120A
  30. GRB 110106A: CrAO optical observations
  31. GRB 110119A: Fermi GBM detection
  32. GRB 110119A: Suzaku WAM observation of the prompt emission
  33. GRB 110112A: optical upper limit
  34. GRB110119: Swift/UVOT Detection
  35. GRB 110119A: Swift-XRT refined Analysis
  36. GRB 110119A: Swift-BAT refined analysis
  37. GRB 110119A: PAIRITEL NIR Afterglow Detection
  38. GRB 110119A: Enhanced Swift-XRT position
  39. GRB 110119A: Swift detection of a burst with an optical detection
  40. GRB 101219B: GROND detection of a SN signature
  41. Swift-BAT trigger 442771 is a noise fluctuation
  42. GRB 101219B: correction
  43. GRB 101219B: Likely the GRB host emission dominates now in the uvw2 filter
  44. New feature in Fermi GBM GRB Ground Position Notices
  45. Swift-BAT Trigger 442539 is not a GRB
  46. Swift Trigger 442539 is probably not a GRB
  47. GRB 110112B: Swift XRT and UVOT observations of the INTEGRAL burst
  48. GRB 110107A: Swift-XRT afterglow confirmation
  49. GRB 110112A: Swift-XRT refined Analysis
  50. GRB 110112A: Swift/UVOT upper limits
  51. GRB 110112A: MASTER optical observations
  52. GRB 110112A: Swift-BAT refined analysis
  53. GRB 110112A: Enhanced Swift-XRT position
  54. GRB 110112A: Swift detection of a possible short burst
  55. GRB 110107A: Swift/UVOT upper limits
  56. GRB 101225a
  57. GRB 110107A: Swift-XRT Afterglow Candidate
  58. GRB 110107A: Swift-BAT refined analysis
  59. GRB 110107A detected in ground analysis of BAT slew data
  60. GRB 110106B: Fermi GBM detection
  61. GRB 110106B: Swift-XRT refined Analysis
  62. GRB 110106B: Swift-BAT refined analysis
  63. GRB 110106B: Enhanced Swift-XRT position
  64. GRB 110106A: Swift/UVOT Upper Limits
  65. GRB 110106A: Swift-XRT refined Analysis
  66. GRB 110106A: Swift-BAT refined analysis
  67. GRB 110106A: Enhanced Swift-XRT position
  68. GRB 110106B: Swift detection of a burst
  69. GRB 110106A: MASTER optical observations
  70. GRB 110106A: Swift detection of a burst
  71. GRB 110102A: Swift-XRT refined Analysis
  72. GRB 101219B: After 2 weeks still detected by Swift/UVOT
  73. Konus-Wind observation of GRB 110102A
  74. GRB110102A: Swift/UVOT observations
  75. GRB 110102A: Fermi GBM observation
  76. GRB 110102A: Swift-BAT refined analysis
  77. GRB 110102A: Enhanced Swift-XRT position
  78. GRB 110102A: Swift detection of a burst with an optical detection
  79. GRB 101225A: MAXI/GSC observations
  80. GRB 101225A Late-time emission observed by Swift-BAT
  81. Tentative redshift of GRB101225A (Christmas's burst) from Swift-XRT data
  82. GRB 101225A, Swift-BAT refined analysis
  83. GRB 101225A: Swift/UVOT Detection
  84. GRB 101225A: Swift-XRT refined Analysis
  85. GRB 101225A: Enhanced Swift-XRT position
  86. Trigger 441015 / GRB 101225A: NOT optical afterglow candidate
  87. GRB 101225A (Swift trigger 441015): optical upper limit
  88. Trigger 441015: Swift detection of a possible burst or transient
  89. GRB 101224A: Swift/UVOT Upper Limits
  90. GRB 101224A: Fermi GBM observation
  91. GRB 101224A: Swift-XRT refined Analysis
  92. GRB 101224A, Swift-BAT refined analysis
  93. GRB 101224A - UVOT-enhanced XRT position
  94. GRB 101224A: Swift detection of a short burst
  95. GRB 101219B: Swift/UVOT refined analysis
  96. GRB 101219B: Swift-XRT refined Analysis
  97. GRB 101219B: Enhanced Swift-XRT position
  98. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  99. GRB 101219B: Fermi GBM observation
  100. GRB 101219B: Swift-BAT refined analysis

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