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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"

28123 results found.

  1. GRB 080928: Watcher observations
  2. GRB 080927: Fermi GBM detection
  3. GRB 080928: VLT redshift
  4. GRB 080928: Swift-XRT refined analysis
  5. GRB 080928, Swift-BAT final refined analysis
  6. GRB 080928: GROND DETECTION
  7. GRB 080928: Enhanced Swift-XRT position
  8. GRB 080928, Swift-BAT initial refined analysis
  9. GRB 080928A: ROTSE-III Confirmation of Optical Counterpart
  10. GRB 080928: Swift detection of a burst with an optical counterpart
  11. GRB 080925: Fermi GBM Detection
  12. GRB 080920: Fermi GBM detection
  13. GRB080922, optical upper limit
  14. Swift trigger 325707: Swift/UVOT Upper Limits
  15. Swift trigger 325707: Swift-XRT upper limit
  16. Swift detection of a possible GRB (trigger 325707)
  17. GRB080916A: Suzaku WAM observation of the prompt emission
  18. GRB 080922: Swift/UVOT Upper Limits
  19. GRB080922: Swift-XRT upper limit
  20. GRB080922: A long GRB detected by INTEGRAL
  21. GRB 080913B: Fermi GBM detection
  22. Trigger 324561: IGR J08408-4503 detected by Swift
  23. GRB 080919: Swift-XRT refined analysis
  24. GRB 080919, Swift-BAT refined analysis
  25. GRB 080916C: IRSF/SIRUS NIR Observation
  26. GRB 080916C: GROND Confirmation of the Optical Afterglow
  27. GRB 080916C: GROND Confirmation of the Optical Afterglow
  28. GRB 080919: REM NIR observations
  29. GRB 080919: Swift detection of a short burst
  30. GRB 080915A: GROND upper limits
  31. GRB 080916A: GROND lightcurve
  32. SGR 0501+4516: preliminary results of the Suzaku ToO observation
  33. GRB 080916A: Fermi GBM detection
  34. GRB 080916C: Swift UVOT Refined Analysis
  35. GRB 080916C: Swift XRT refined analysis
  36. GRB 080916B: Swift-XRT refined analysis
  37. Konus-Wind observation of GRB 080916A
  38. GRB 080916C: GROND Detection of the Optical Afterglow Candidate
  39. GRB 080913: Konus-Wind and Swift/BAT joint spectral analysis
  40. GRB 080916C: Enhanced XRT position
  41. GRB080916A: Spectroscopic redshift
  42. GRB 080916C: Swift/XRT detection of possible afterglow
  43. GRB 080916B: Swift UVOT Refined Analysis
  44. GRB 080916B, Swift-BAT refined analysis
  45. GRB080916A: Refined Swift/UVOT Observations
  46. GRB 080915a, SMARTS optical/IR observations
  47. GRB 080916B: Enhanced Swift-XRT position
  48. GRB 080916C: Fermi LAT observation
  49. GRB 080916C: Fermi GBM Detection
  50. GRB 080916A: Swift XRT refined analysis
  51. GRB 080916A, Swift-BAT refined analysis
  52. GRB 080916B: Swift-XRT afterglow detection
  53. GRB 080916A: Enhanced Swift-XRT position
  54. GRB 080916: REM detection of the NIR afterglow
  55. GRB 080916: REM candidate afterglow
  56. GRB 080916: Swift detection of a burst with optical afterglow
  57. GRB 080915B, Swift-BAT refined analysis
  58. GRB 080912 : Fermi GBM detection
  59. GRB 080915: REM NIR early observations
  60. GRB 080915: Swift/UVOT Upper Limits
  61. GRB 080915: Swift-XRT afterglow detection and analysis
  62. GRB 080915, Swift-BAT refined analysis
  63. GRB 080915: ROTSE-III Optical Limits
  64. GRB 080913: Swift-XRT refined analysis
  65. GRB080913: Swift/UVOT Upper Limits
  66. GRB 080913, Swift-BAT refined analysis
  67. GRB 080913: VLT/FORS2 observations
  68. GRB 080913: REM NIR early observations
  69. GRB 080913: Enhanced Swift-XRT position
  70. GRB 080913: GROND observation of a high-z optical/NIR afterglow candidate
  71. GRB 080913: Swift detection of a burst
  72. GRB 080906: Watcher observations
  73. Swift-BAT/-XRT refined analysis on trigger 324362 (LS I +61 303)
  74. GRB 080906B: Fermi GBM detection
  75. GRB 080905C: Fermi GBM detection
  76. SGR J0501+4516: radio pulsar searches with GBT and WSRT
  77. Swift trigger 324362 (LS I +61 303 ?)
  78. GRB080905A: Swift/UVOT Upper Limits
  79. GRB 080905B: Watcher optical detection
  80. GRB 080904: Fermi Gamma-ray Burst Monitor detection
  81. GRB 080905B: Fermi Gamma-ray Burst Monitor detection
  82. GRB 080905A: Fermi Gamma-ray Burst Monitor detection
  83. GRB 080905A: MITSuME Akeno optical upper limits
  84. GRB 080906: Refined Swift/UVOT Observations
  85. GRB 080906: Swift-XRT Refined Analysis
  86. GRB 080906, Swift-BAT refined analysis
  87. GRB 080905A: optical afterglow
  88. GRB 080906: GROND observations of the optical/NIR afterglow
  89. GRB 080905B: Refined UVOT Analysis
  90. GRB 080905B: VLT redshift
  91. GRB 080905A: NOT and VLT observations
  92. GRB 080905B: Enhanced Swift-XRT position
  93. GRB 080905B, Swift-BAT refined analysis
  94. GRB 080905A, Swift-BAT refined analysis
  95. GRB 080906: Swift detection of a burst with optical afterglow
  96. GRB 080905A: Swift-XRT Refined Analysis
  97. GRB080825C: Fermi-LAT observations
  98. GRB 080905B: Swift detection of a burst with possible optical counterpart
  99. GRB 080905: Swift detection of a probably-short burst
  100. GRB 080903: Swift/UVOT Observations

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