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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"

27811 results found.

  1. GRB 080928: Swift-XRT refined analysis
  2. GRB 080928: Swift/UVOT observations
  3. GRB 080928, Swift-BAT final refined analysis
  4. GRB 080928: GROND DETECTION
  5. GRB 080928: Enhanced Swift-XRT position
  6. GRB 080928, Swift-BAT initial refined analysis
  7. GRB 080928A: ROTSE-III Confirmation of Optical Counterpart
  8. GRB 080928: Swift detection of a burst with an optical counterpart
  9. GRB 080925: Fermi GBM Detection
  10. GRB 080920: Fermi GBM detection
  11. Swift-BAT trigger 325707 is not a GRB
  12. Swift trigger 325707: Swift/UVOT Upper Limits
  13. Swift trigger 325707: Swift-XRT upper limit
  14. Swift detection of a possible GRB (trigger 325707)
  15. GRB080916A: Suzaku WAM observation of the prompt emission
  16. GRB 080922: Swift/UVOT Upper Limits
  17. GRB080922: Swift-XRT upper limit
  18. GRB 080913B: Fermi GBM detection
  19. Trigger 324561: IGR J08408-4503 detected by Swift
  20. GRB 080919: Swift/UVOT Refined Analysis
  21. GRB 080919: Swift-XRT refined analysis
  22. GRB 080919, Swift-BAT refined analysis
  23. GRB 080919: Swift detection of a short burst
  24. GRB080913: Swift-BAT spectral lag
  25. SGR 0501+4516: preliminary results of the Suzaku ToO observation
  26. GRB 080916A: Fermi GBM detection
  27. GRB 080916C: Swift UVOT Refined Analysis
  28. GRB 080916C: Swift XRT refined analysis
  29. GRB 080916B: Swift-XRT refined analysis
  30. Konus-Wind observation of GRB 080916A
  31. GRB 080916C: GROND Detection of the Optical Afterglow Candidate
  32. GRB 080913: Konus-Wind and Swift/BAT joint spectral analysis
  33. GRB 080916C: Enhanced XRT position
  34. GRB 080916C: Swift/XRT detection of possible afterglow
  35. GRB 080916B: Swift UVOT Refined Analysis
  36. GRB 080916B, Swift-BAT refined analysis
  37. GRB080916A: Refined Swift/UVOT Observations
  38. GRB 080916B: Enhanced Swift-XRT position
  39. GRB 080916C: Fermi LAT observation
  40. GRB 080916C: Fermi GBM Detection
  41. GRB 080916A: Swift XRT refined analysis
  42. GRB 080916A, Swift-BAT refined analysis
  43. GRB 080916B: Swift-XRT afterglow detection
  44. GRB 080916A: Enhanced Swift-XRT position
  45. GRB 080916B: Swift detection of a burst
  46. GRB 080916: REM detection of the NIR afterglow
  47. GRB 080916: Swift detection of a burst with optical afterglow
  48. GRB 080915B, Swift-BAT refined analysis
  49. GRB 080912 : Fermi GBM detection
  50. GRB 080915B: Swift detection of a burst
  51. GRB 080915: Swift/UVOT Upper Limits
  52. GRB 080915: Swift-XRT afterglow detection and analysis
  53. GRB 080915, Swift-BAT refined analysis
  54. GRB 080915: ROTSE-III Optical Limits
  55. GRB 080915: Swift detection of a burst
  56. GRB 080913: Swift-XRT refined analysis
  57. GRB080913: Swift/UVOT Upper Limits
  58. GRB 080913: GROND photo-z
  59. GRB 080913, Swift-BAT refined analysis
  60. GRB 080913: VLT/FORS2 observations
  61. GRB 080913: Enhanced Swift-XRT position
  62. GRB 080913: GROND observation of a high-z optical/NIR afterglow candidate
  63. GRB 080913: Swift detection of a burst
  64. GRB 080906: Watcher observations
  65. Swift-BAT/-XRT refined analysis on trigger 324362 (LS I +61 303)
  66. GRB 080906B: Fermi GBM detection
  67. GRB 080905C: Fermi GBM detection
  68. SGR J0501+4516: radio pulsar searches with GBT and WSRT
  69. Swift trigger 324362 (LS I +61 303 ?): XRT
  70. GRB 080905B: Photometric Redshift for the 2MASS Galaxy
  71. Swift trigger 324362 (LS I +61 303 ?)
  72. GRB080905A: Swift/UVOT Upper Limits
  73. GRB 080905B: Watcher optical detection
  74. GRB 080904: Fermi Gamma-ray Burst Monitor detection
  75. GRB 080905B: Fermi Gamma-ray Burst Monitor detection
  76. GRB 080905A: Fermi Gamma-ray Burst Monitor detection
  77. GRB 080905A: Enhanced Swift-XRT position
  78. Swift Trigger 324122 is again known source Swift J1842.5-1124
  79. Swift Trigger 324116 is known source again
  80. Swift Trigger 324112 is known source Swift J1842.5-1124
  81. GRB 080906: Refined Swift/UVOT Observations
  82. GRB 080906: Swift-XRT Refined Analysis
  83. GRB 080906, Swift-BAT refined analysis
  84. GRB 080906: GROND observations of the optical/NIR afterglow
  85. GRB 080905B: Swift-XRT Refined Analysis
  86. GRB 080905B: Refined UVOT Analysis
  87. GRB 080905B: VLT redshift
  88. GRB 080905B: Enhanced Swift-XRT position
  89. GRB 080905B, Swift-BAT refined analysis
  90. GRB 080905A, Swift-BAT refined analysis
  91. GRB 080906: Swift detection of a burst with optical afterglow
  92. GRB 080905A: Swift-XRT Refined Analysis
  93. GRB080825C: Fermi-LAT observations
  94. GRB 080905B: Swift detection of a burst with possible optical counterpart
  95. GRB 080905: R & I-band optical observations
  96. GRB 080905: Swift detection of a probably-short burst
  97. GRB 080903: Swift/UVOT Observations
  98. GRB 080903: Swift-XRT Refined Analysis
  99. GRB 080903: Enhanced Swift-XRT position
  100. GRB 080903, Swift-BAT refined analysis

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