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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"

37565 results found.

  1. GRB 080915: Swift/UVOT Upper Limits
  2. GRB 080915: Swift-XRT afterglow detection and analysis
  3. GRB 080915, Swift-BAT refined analysis
  4. GRB 080915: ROTSE-III Optical Limits
  5. GRB 080915: Swift detection of a burst
  6. GRB 080913: Swift-XRT refined analysis
  7. GRB 080913: VLT/FORS spectrum
  8. GRB080913: Swift/UVOT Upper Limits
  9. GRB 080913: GROND photo-z
  10. GRB 080913, Swift-BAT refined analysis
  11. GRB 080913: VLT/FORS2 observations
  12. GRB 080913: REM NIR early observations
  13. GRB 080913: Enhanced Swift-XRT position
  14. GRB 080913: GROND observation of a high-z optical/NIR afterglow candidate
  15. GRB 080913: Swift detection of a burst
  16. GRB 080906: Watcher observations
  17. Swift-BAT/-XRT refined analysis on trigger 324362 (LS I +61 303)
  18. GRB 080906B: Fermi GBM detection
  19. GRB 080905C: Fermi GBM detection
  20. GRB 080905B: Photometric Redshift for the 2MASS Galaxy
  21. Swift trigger 324362 (LS I +61 303 ?)
  22. GRB080905A: Swift/UVOT Upper Limits
  23. GRB 080905B: Watcher optical detection
  24. GRB 080904: Fermi Gamma-ray Burst Monitor detection
  25. GRB 080905B: Fermi Gamma-ray Burst Monitor detection
  26. GRB 080905A: Fermi Gamma-ray Burst Monitor detection
  27. GRB 080905A: Enhanced Swift-XRT position
  28. GRB 080905A: MITSuME Akeno optical upper limits
  29. Swift Trigger 324116 is known source again
  30. Swift Trigger 324112 is known source Swift J1842.5-1124
  31. GRB 080906: Refined Swift/UVOT Observations
  32. GRB 080906: Swift-XRT Refined Analysis
  33. GRB 080906, Swift-BAT refined analysis
  34. GRB 080905A: optical afterglow
  35. GRB 080906: GROND observations of the optical/NIR afterglow
  36. GRB 080905B: Swift-XRT Refined Analysis
  37. GRB 080905B: Refined UVOT Analysis
  38. GRB 080905B: VLT redshift
  39. GRB 080905A: NOT and VLT observations
  40. GRB 080905B: Enhanced Swift-XRT position
  41. GRB 080905B, Swift-BAT refined analysis
  42. GRB 080905A, Swift-BAT refined analysis
  43. GRB 080906: Swift detection of a burst with optical afterglow
  44. GRB 080905A: Swift-XRT Refined Analysis
  45. GRB 080825C: Fermi GBM Spectral Analysis
  46. GRB080825C: Fermi-LAT observations
  47. GRB 080905B: Swift detection of a burst with possible optical counterpart
  48. GRB 080905: R & I-band optical observations
  49. GRB 080905: Swift detection of a probably-short burst
  50. GRB 080903: Swift/UVOT Observations
  51. GRB 080903: Swift-XRT Refined Analysis
  52. GRB 080903: Enhanced Swift-XRT position
  53. GRB 080903, Swift-BAT refined analysis
  54. GRB 080903: optical observations
  55. GRB 080903: Liverpool Telescope observations
  56. GRB 080903: Astrotel-Caucasus optical observations
  57. GRB 080903: Optical afterglow candidate
  58. GRB 080903: TAROT Calern observatory optical observations
  59. GRB 080903: ROTSE-III Optical Limits
  60. GRB 080903: Swift detection of a burst
  61. GRB 080830: Fermi Gamma-ray Burst Monitor detection
  62. GRB080828: Swift/UVOT Upper Limits
  63. GRB080825B: Swift/UVOT Upper Limits
  64. GRB 080828: Swift-XRT detection of a possible X-ray afterglow
  65. Swift-BAT trigger 322590 is not a GRB
  66. Swift trigger 322590: BAT detection of a possible burst
  67. GRB 080828: SuperAGILE GRB Localization
  68. GRB080823: Fermi Gamma-ray Burst Monitor detection
  69. GRB 080824: Fermi Gamma Ray Burst Monitor detection
  70. GRB 080825B: pseudo-z= 0.83 from prompt emission spectrum
  71. Konus-Wind observation of GRB 080825B
  72. GRB080825C: GLAST Burst Monitor detection
  73. GRB 080825B: Swift-XRT team analysis
  74. SGR 0501+4516: Fermi GBM (formerly GLAST Burst Monitor) observations of three exceptionally intense outbursts
  75. GRB080825: Afterglow confirmation and redshift estimate
  76. GRB 080825B - optical counterpart candidate
  77. GRB 080825B: GRB Localization by SuperAGILE
  78. GRB 080822B, Swift-BAT refined analysis
  79. GRB 080822B: MASTER optical observation
  80. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  81. Swift Trigger 321481: A Large Flare from SGR 0501+4516
  82. GRB 080822B: Swift detection of a burst
  83. GRB080818B: GLAST Burst Monitor detection
  84. GRB 080822 (SGR 0501+4516): archival optical observations
  85. New Soft Gamma Repeater 0501+4516 was GRB 080822
  86. GRB 080822: Swift detection of a short burst
  87. GLAST Burst Monitor detection of a GRB: 080816B
  88. GLAST Burst Monitor detection of GRB 080818
  89. GLAST Burst Monitor detection of GRB080817B
  90. GLAST Burst Monitor detection of GRB 080817
  91. GLAST Burst Monitor detection of GRB080816
  92. GRB080810 - optical observations
  93. GRB080810: optical observations
  94. GLAST Burst Monitor detection of GRB 080812
  95. Radio detection of GRB 080810 with the VLA
  96. GRB 080810: RTT150 optical observations
  97. GRB 080810: Konus-Wind and Swift/BAT joint spectral analysis
  98. GLAST Burst Monitor detection of GRB 080810
  99. GRB 080810: Liverpool and Faulkes North observations
  100. GRB 080810: RTT150 optical observations

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