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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"

26512 results found.

  1. AXP 1E1547.0-5408 (SGR 1550-5418): Fermi GBM detection
  2. GRB 081003: A long GRB discovered by INTEGRAL
  3. Swift discovery of a new Soft Gamma Repeater SGR 1550-5418
  4. Trigger 330353: Swift detection of a Galactic short soft burst
  5. GRB 081001: Observations from OSN
  6. GRB 080925: Suzaku WAM observation of the prompt emission
  7. GRB081001: SuperAGILE Localization of a long GRB
  8. GRB080928: redshift retraction
  9. GRB 080927: Fermi GBM detection
  10. GRB 080928: VLT redshift
  11. GRB 080928: Swift-XRT refined analysis
  12. GRB 080928, Swift-BAT final refined analysis
  13. GRB 080928: GROND DETECTION
  14. GRB 080928: Enhanced Swift-XRT position
  15. GRB 080928, Swift-BAT initial refined analysis
  16. GRB 080928: Swift detection of a burst with an optical counterpart
  17. GRB 080925: Fermi GBM Detection
  18. GRB 080920: Fermi GBM detection
  19. Swift trigger 325707: Swift-XRT upper limit
  20. Swift detection of a possible GRB (trigger 325707)
  21. GRB080916A: Suzaku WAM observation of the prompt emission
  22. GRB080922: Swift-XRT upper limit
  23. GRB080922: A long GRB detected by INTEGRAL
  24. GRB 080913B: Fermi GBM detection
  25. Trigger 324561: IGR J08408-4503 detected by Swift
  26. GRB 080916C: Fermi GBM Spectral Analysis
  27. GRB 080919: Swift/UVOT Refined Analysis
  28. GRB 080919: Swift-XRT refined analysis
  29. GRB 080919, Swift-BAT refined analysis
  30. GRB 080916C: IRSF/SIRUS NIR Observation
  31. GRB 080916C: GROND Confirmation of the Optical Afterglow
  32. GRB 080916C: GROND Confirmation of the Optical Afterglow
  33. GRB 080919: Swift detection of a short burst
  34. GRB 080916A: GROND lightcurve
  35. SGR 0501+4516: preliminary results of the Suzaku ToO observation
  36. GRB 080916A: Fermi GBM detection
  37. GRB 080916C: Swift XRT refined analysis
  38. Konus-Wind observation of GRB 080916A
  39. Konus-Wind observation of GRB 080916C
  40. GRB 080916C: GROND Detection of the Optical Afterglow Candidate
  41. GRB 080913: Konus-Wind and Swift/BAT joint spectral analysis
  42. GRB 080916C: Enhanced XRT position
  43. IPN Triangulation and Energy Spectrum of GRB080916C
  44. GRB 080916B, Swift-BAT refined analysis
  45. GRB 080915a, SMARTS optical/IR observations
  46. GRB 080916B: Enhanced Swift-XRT position
  47. GRB 080916C: Fermi LAT observation
  48. GRB 080916A: Swift XRT refined analysis
  49. GRB 080916A, Swift-BAT refined analysis
  50. GRB 080916A: Enhanced Swift-XRT position
  51. GRB 080916B: Swift detection of a burst
  52. GRB 080916: Swift detection of a burst with optical afterglow
  53. GRB 080915B, Swift-BAT refined analysis
  54. GRB 080912 : Fermi GBM detection
  55. GRB 080915B: Swift detection of a burst
  56. GRB 080915, Swift-BAT refined analysis
  57. SGR 0501+4516 : P200 i-band observations
  58. GRB 080915: ROTSE-III Optical Limits
  59. GRB 080915: Swift detection of a burst
  60. GRB 080913: Swift-XRT refined analysis
  61. GRB 080913: VLT/FORS spectrum
  62. GRB 080913, Swift-BAT refined analysis
  63. GRB 080913: VLT/FORS2 observations
  64. GRB 080913: REM NIR early observations
  65. GRB 080913: Enhanced Swift-XRT position
  66. GRB 080913: Swift detection of a burst
  67. GRB 080906: Watcher observations
  68. Swift-BAT/-XRT refined analysis on trigger 324362 (LS I +61 303)
  69. GRB 080906B: Fermi GBM detection
  70. GRB 080905C: Fermi GBM detection
  71. Swift trigger 324362 (LS I +61 303 ?): XRT
  72. Swift trigger 324362 (LS I +61 303 ?)
  73. GRB080905A: Swift/UVOT Upper Limits
  74. GRB 080905B: Watcher optical detection
  75. GRB 080904: Fermi Gamma-ray Burst Monitor detection
  76. GRB 080905B: Fermi Gamma-ray Burst Monitor detection
  77. GRB 080905A: Fermi Gamma-ray Burst Monitor detection
  78. GRB 080905A: Enhanced Swift-XRT position
  79. Swift Trigger 324122 is again known source Swift J1842.5-1124
  80. Swift Trigger 324116 is known source again
  81. Swift Trigger 324112 is known source Swift J1842.5-1124
  82. GRB 080906: Swift-XRT Refined Analysis
  83. GRB 080906, Swift-BAT refined analysis
  84. GRB 080905A: optical afterglow
  85. GRB 080906: GROND observations of the optical/NIR afterglow
  86. GRB 080905B: Swift-XRT Refined Analysis
  87. GRB 080905B: VLT redshift
  88. GRB 080905A: NOT and VLT observations
  89. GRB 080905B: Enhanced Swift-XRT position
  90. GRB 080905B, Swift-BAT refined analysis
  91. GRB 080905A, Swift-BAT refined analysis
  92. GRB 080905A: Swift-XRT Refined Analysis
  93. GRB 080825C: Fermi GBM Spectral Analysis
  94. GRB080825C: Fermi-LAT observations
  95. GRB 080905B: Swift detection of a burst with possible optical counterpart
  96. GRB 080905: R & I-band optical observations
  97. GRB 080905: Swift detection of a probably-short burst
  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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