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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"

37682 results found.

  1. GRB080916A: Refined Swift/UVOT Observations
  2. GRB 080915a, SMARTS optical/IR observations
  3. GRB 080916B: Enhanced Swift-XRT position
  4. GRB 080916C: Fermi LAT observation
  5. GRB 080916C: Fermi GBM Detection
  6. GRB 080916A: Swift XRT refined analysis
  7. GRB 080916A, Swift-BAT refined analysis
  8. GRB 080916B: Swift-XRT afterglow detection
  9. GRB 080916A: Enhanced Swift-XRT position
  10. GRB 080916B: Swift detection of a burst
  11. GRB 080916: REM detection of the NIR afterglow
  12. GRB 080916: REM candidate afterglow
  13. GRB 080916: Swift detection of a burst with optical afterglow
  14. GRB 080915B, Swift-BAT refined analysis
  15. GRB 080912 : Fermi GBM detection
  16. GRB 080915B: Swift detection of a burst
  17. GRB 080915: REM NIR early observations
  18. GRB 080915: Swift/UVOT Upper Limits
  19. GRB 080915: Swift-XRT afterglow detection and analysis
  20. GRB 080915, Swift-BAT refined analysis
  21. GRB 080915: ROTSE-III Optical Limits
  22. GRB 080915: Swift detection of a burst
  23. GRB 080913: Swift-XRT refined analysis
  24. GRB 080913: VLT/FORS spectrum
  25. GRB080913: Swift/UVOT Upper Limits
  26. GRB 080913: GROND photo-z
  27. GRB 080913, Swift-BAT refined analysis
  28. GRB 080913: VLT/FORS2 observations
  29. GRB 080913: REM NIR early observations
  30. GRB 080913: Enhanced Swift-XRT position
  31. GRB 080913: GROND observation of a high-z optical/NIR afterglow candidate
  32. GRB 080913: Swift detection of a burst
  33. GRB 080906: Watcher observations
  34. Swift-BAT/-XRT refined analysis on trigger 324362 (LS I +61 303)
  35. GRB 080906B: Fermi GBM detection
  36. GRB 080905C: Fermi GBM detection
  37. GRB 080905B: Photometric Redshift for the 2MASS Galaxy
  38. Swift trigger 324362 (LS I +61 303 ?)
  39. GRB080905A: Swift/UVOT Upper Limits
  40. GRB 080905B: Watcher optical detection
  41. GRB 080904: Fermi Gamma-ray Burst Monitor detection
  42. GRB 080905B: Fermi Gamma-ray Burst Monitor detection
  43. GRB 080905A: Fermi Gamma-ray Burst Monitor detection
  44. GRB 080905A: Enhanced Swift-XRT position
  45. GRB 080905A: MITSuME Akeno optical upper limits
  46. Swift Trigger 324116 is known source again
  47. Swift Trigger 324112 is known source Swift J1842.5-1124
  48. GRB 080906: Refined Swift/UVOT Observations
  49. GRB 080906: Swift-XRT Refined Analysis
  50. GRB 080906, Swift-BAT refined analysis
  51. GRB 080905A: optical afterglow
  52. GRB 080906: GROND observations of the optical/NIR afterglow
  53. GRB 080905B: Swift-XRT Refined Analysis
  54. GRB 080905B: Refined UVOT Analysis
  55. GRB 080905B: VLT redshift
  56. GRB 080905A: NOT and VLT observations
  57. GRB 080905B: Enhanced Swift-XRT position
  58. GRB 080905B, Swift-BAT refined analysis
  59. GRB 080905A, Swift-BAT refined analysis
  60. GRB 080906: Swift detection of a burst with optical afterglow
  61. GRB 080905A: Swift-XRT Refined Analysis
  62. GRB 080825C: Fermi GBM Spectral Analysis
  63. GRB080825C: Fermi-LAT observations
  64. GRB 080905B: Swift detection of a burst with possible optical counterpart
  65. GRB 080905: R & I-band optical observations
  66. GRB 080905: Swift detection of a probably-short burst
  67. GRB 080903: Swift/UVOT Observations
  68. GRB 080903: Swift-XRT Refined Analysis
  69. GRB 080903: Enhanced Swift-XRT position
  70. GRB 080903, Swift-BAT refined analysis
  71. GRB 080903: optical observations
  72. GRB 080903: Liverpool Telescope observations
  73. GRB 080903: Astrotel-Caucasus optical observations
  74. GRB 080903: Optical afterglow candidate
  75. GRB 080903: TAROT Calern observatory optical observations
  76. GRB 080903: ROTSE-III Optical Limits
  77. GRB 080903: Swift detection of a burst
  78. GRB 080830: Fermi Gamma-ray Burst Monitor detection
  79. GRB080828: Swift/UVOT Upper Limits
  80. GRB080825B: Swift/UVOT Upper Limits
  81. GRB 080828: Swift-XRT detection of a possible X-ray afterglow
  82. Swift-BAT trigger 322590 is not a GRB
  83. Swift trigger 322590: BAT detection of a possible burst
  84. GRB 080828: SuperAGILE GRB Localization
  85. GRB080823: Fermi Gamma-ray Burst Monitor detection
  86. GRB 080824: Fermi Gamma Ray Burst Monitor detection
  87. GRB 080825B: pseudo-z= 0.83 from prompt emission spectrum
  88. Konus-Wind observation of GRB 080825B
  89. GRB080825C: GLAST Burst Monitor detection
  90. GRB 080825B: Swift-XRT team analysis
  91. SGR 0501+4516: Fermi GBM (formerly GLAST Burst Monitor) observations of three exceptionally intense outbursts
  92. GRB080825: Afterglow confirmation and redshift estimate
  93. GRB 080825B - optical counterpart candidate
  94. GRB 080825B: GRB Localization by SuperAGILE
  95. GRB 080822B, Swift-BAT refined analysis
  96. GRB 080822B: MASTER optical observation
  97. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  98. Swift Trigger 321481: A Large Flare from SGR 0501+4516
  99. GRB 080822B: Swift detection of a burst
  100. GRB080818B: GLAST Burst Monitor detection

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