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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"

37680 results found.

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

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