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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"

19609 results found.

  1. GRB 081012: Fermi GBM detection
  2. GRB 081007 and GRB 081007B: Fermi GBM detection
  3. GRB 081012: Swift/UVOT analysis of initial observations
  4. GRB 081012: Swift/XRT detection
  5. GRB 081012, Swift-BAT refined analysis
  6. GRB 081012: ROTSE-III Optical Limits
  7. GRB 081012: Swift detection of a burst
  8. Revised table for GRB 081011 UVOT detections
  9. GRB081011: UVOT detection of an optical afterglow
  10. GRB 081011: Swift/XRT detection
  11. GRB 081011, Swift-BAT refined analysis
  12. GRB 081011: Swift detection of a burst
  13. GRB 081008, Swift-BAT refined analysis
  14. GRB 081008: Swift-XRT Refined Analysis
  15. GRB081008: Swift/UVOT observations
  16. GRB 081008: Enhanced Swift-XRT position
  17. GRB 081008: Swift detection of a burst with optical afterglow
  18. GRB 081008: ROTSE-III Detection of Optical Counterpart
  19. GRB081007: Swift/UVOT Observations
  20. GRB 081007, Swift-BAT refined analysis
  21. GRB 081007: Early RAPTOR measurements of optical counterpart
  22. GRB 081007: Swift-XRT Team refined analysis
  23. GRB 081007: Enhanced Swift-XRT position
  24. GRB 081007: Swift detection of a burst with optical afterglow
  25. AXP 1E 1547.0-5408: Swift/UVOT Upper Limits
  26. GRB 081003B: Swift-XRT upper limit
  27. GRB 081003A: OSN optical observations
  28. AXP 1E1547.0-5408: Swift-XRT Team refined analysis
  29. GRB 081003A: Swift-XRT Team position and analysis
  30. Swift-BAT refined analysis of AXP 1E1547.0-5408 (Trigger 330353)
  31. GRB 080928: Fermi GBM detection
  32. AXP 1E1547.0-5408 (SGR 1550-5418): Fermi GBM detection
  33. SGR 1550-5418 = AXP 1E1547.0-5408 (Trigger 330353)
  34. Swift discovery of a new Soft Gamma Repeater SGR 1550-5418
  35. Trigger 330353: Swift detection of a Galactic short soft burst
  36. GRB 081001: Observations from OSN
  37. GRB 081001: Swift UVOT Observations
  38. GRB 081001: Swift-XRT position
  39. GRB 080928: Watcher observations
  40. GRB 080928: VLT redshift
  41. GRB 080928: Swift-XRT refined analysis
  42. GRB 080928: Swift/UVOT observations
  43. GRB 080928, Swift-BAT final refined analysis
  44. GRB 080928: Enhanced Swift-XRT position
  45. GRB 080928, Swift-BAT initial refined analysis
  46. GRB 080928A: ROTSE-III Confirmation of Optical Counterpart
  47. GRB 080928: Swift detection of a burst with an optical counterpart
  48. Swift-BAT trigger 325707 is not a GRB
  49. Swift trigger 325707: Swift/UVOT Upper Limits
  50. Swift trigger 325707: Swift-XRT upper limit
  51. Swift detection of a possible GRB (trigger 325707)
  52. GRB080916A: Suzaku WAM observation of the prompt emission
  53. GRB 080922: Swift/UVOT Upper Limits
  54. GRB080922: Swift-XRT upper limit
  55. Trigger 324561: IGR J08408-4503 detected by Swift
  56. GRB 080919: Swift/UVOT Refined Analysis
  57. GRB 080919: Swift-XRT refined analysis
  58. GRB 080919, Swift-BAT refined analysis
  59. GRB 080919: Swift detection of a short burst
  60. GRB080913: Swift-BAT spectral lag
  61. SGR 0501+4516: preliminary results of the Suzaku ToO observation
  62. GRB 080916A: Fermi GBM detection
  63. GRB 080916C: Swift UVOT Refined Analysis
  64. GRB 080916C: Swift XRT refined analysis
  65. GRB 080916B: Swift-XRT refined analysis
  66. Konus-Wind observation of GRB 080916A
  67. GRB 080916C: GROND Detection of the Optical Afterglow Candidate
  68. GRB 080913: Konus-Wind and Swift/BAT joint spectral analysis
  69. GRB 080916C: Enhanced XRT position
  70. GRB 080916C: Swift/XRT detection of possible afterglow
  71. GRB 080916B: Swift UVOT Refined Analysis
  72. GRB 080916B, Swift-BAT refined analysis
  73. GRB080916A: Refined Swift/UVOT Observations
  74. GRB 080916B: Enhanced Swift-XRT position
  75. GRB 080916A: Swift XRT refined analysis
  76. GRB 080916A, Swift-BAT refined analysis
  77. GRB 080916B: Swift-XRT afterglow detection
  78. GRB 080916A: Enhanced Swift-XRT position
  79. GRB 080916B: Swift detection of a burst
  80. GRB 080916: Swift detection of a burst with optical afterglow
  81. GRB 080915B, Swift-BAT refined analysis
  82. GRB 080915B: Swift detection of a burst
  83. GRB 080915: Swift/UVOT Upper Limits
  84. GRB 080915: Swift-XRT afterglow detection and analysis
  85. GRB 080915, Swift-BAT refined analysis
  86. GRB 080915: ROTSE-III Optical Limits
  87. GRB 080915: Swift detection of a burst
  88. GRB 080913: Swift-XRT refined analysis
  89. GRB080913: Swift/UVOT Upper Limits
  90. GRB 080913: GROND photo-z
  91. GRB 080913, Swift-BAT refined analysis
  92. GRB 080913: VLT/FORS2 observations
  93. GRB 080913: Enhanced Swift-XRT position
  94. GRB 080913: GROND observation of a high-z optical/NIR afterglow candidate
  95. GRB 080913: Swift detection of a burst
  96. GRB 080906: Watcher observations
  97. Swift-BAT/-XRT refined analysis on trigger 324362 (LS I +61 303)
  98. SGR J0501+4516: radio pulsar searches with GBT and WSRT
  99. Swift trigger 324362 (LS I +61 303 ?): XRT
  100. GRB 080905B: Photometric Redshift for the 2MASS Galaxy

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