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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"

23469 results found.

  1. GRB 080919: Swift/UVOT Refined Analysis
  2. GRB 080919: Swift-XRT refined analysis
  3. GRB 080916C: IRSF/SIRUS NIR Observation
  4. GRB 080916C: GROND Confirmation of the Optical Afterglow
  5. GRB 080916C: GROND Confirmation of the Optical Afterglow
  6. GRB 080919: REM NIR observations
  7. GRB 080919: Swift detection of a short burst
  8. GRB 080915A: GROND upper limits
  9. GRB 080916A: GROND lightcurve
  10. GRB 080916A: Fermi GBM detection
  11. GRB 080916C: Swift UVOT Refined Analysis
  12. GRB 080916C: Swift XRT refined analysis
  13. GRB 080916B: Swift-XRT refined analysis
  14. GRB 080916C: GROND Detection of the Optical Afterglow Candidate
  15. GRB 080913: Konus-Wind and Swift/BAT joint spectral analysis
  16. GRB080916A: Spectroscopic redshift
  17. GRB 080916C: Swift/XRT detection of possible afterglow
  18. GRB 080916B: Swift UVOT Refined Analysis
  19. GRB 080916B, Swift-BAT refined analysis
  20. GRB080916A: Refined Swift/UVOT Observations
  21. GRB 080915a, SMARTS optical/IR observations
  22. GRB 080916B: Enhanced Swift-XRT position
  23. GRB 080916C: Fermi LAT observation
  24. GRB 080916C: Fermi GBM Detection
  25. GRB 080916A, Swift-BAT refined analysis
  26. GRB 080916B: Swift-XRT afterglow detection
  27. GRB 080916A: Enhanced Swift-XRT position
  28. GRB 080916B: Swift detection of a burst
  29. GRB 080916: REM detection of the NIR afterglow
  30. GRB 080916: REM candidate afterglow
  31. GRB 080916: Swift detection of a burst with optical afterglow
  32. GRB 080912 : Fermi GBM detection
  33. GRB 080915B: Swift detection of a burst
  34. GRB 080915: REM NIR early observations
  35. GRB 080915: Swift/UVOT Upper Limits
  36. GRB 080915: ROTSE-III Optical Limits
  37. GRB 080915: Swift detection of a burst
  38. GRB 080913: Swift-XRT refined analysis
  39. GRB080913: Swift/UVOT Upper Limits
  40. GRB 080913: GROND photo-z
  41. GRB 080913: VLT/FORS2 observations
  42. GRB 080913: REM NIR early observations
  43. GRB 080913: Enhanced Swift-XRT position
  44. GRB 080913: GROND observation of a high-z optical/NIR afterglow candidate
  45. GRB 080913: Swift detection of a burst
  46. GRB 080906: Watcher observations
  47. GRB 080906B: Fermi GBM detection
  48. GRB 080905C: Fermi GBM detection
  49. SGR J0501+4516: radio pulsar searches with GBT and WSRT
  50. Swift trigger 324362 (LS I +61 303 ?)
  51. GRB080905A: Swift/UVOT Upper Limits
  52. GRB 080905B: Watcher optical detection
  53. GRB 080904: Fermi Gamma-ray Burst Monitor detection
  54. GRB 080905B: Fermi Gamma-ray Burst Monitor detection
  55. GRB 080905A: Fermi Gamma-ray Burst Monitor detection
  56. GRB 080905A: MITSuME Akeno optical upper limits
  57. Swift Trigger 324122 is again known source Swift J1842.5-1124
  58. Swift Trigger 324116 is known source again
  59. Swift Trigger 324112 is known source Swift J1842.5-1124
  60. GRB 080906: Refined Swift/UVOT Observations
  61. GRB 080906: Swift-XRT Refined Analysis
  62. GRB 080905A: optical afterglow
  63. GRB 080906: GROND observations of the optical/NIR afterglow
  64. GRB 080905B: Swift-XRT Refined Analysis
  65. GRB 080905B: Refined UVOT Analysis
  66. GRB 080905B: VLT redshift
  67. GRB 080905A: NOT and VLT observations
  68. GRB 080905B: Enhanced Swift-XRT position
  69. GRB 080906: Swift detection of a burst with optical afterglow
  70. GRB080825C: Fermi-LAT observations
  71. GRB 080905B: Swift detection of a burst with possible optical counterpart
  72. GRB 080905: Swift detection of a probably-short burst
  73. GRB 080903: Swift/UVOT Observations
  74. GRB 080903: Swift-XRT Refined Analysis
  75. GRB 080903: Enhanced Swift-XRT position
  76. GRB 080903: optical observations
  77. GRB 080903: Liverpool Telescope observations
  78. GRB 080903: Optical afterglow candidate
  79. GRB 080903: TAROT Calern observatory optical observations
  80. GRB 080903: ROTSE-III Optical Limits
  81. GRB 080903: Swift detection of a burst
  82. GRB 080830: Fermi Gamma-ray Burst Monitor detection
  83. SGR 0501+4516: Spin Down Rate and Inferred Dipole Magnetic Field
  84. nIR observations of SGR 0501+4516
  85. SGR 0501+4516: Confirmation of the NIR counterpart
  86. GRB080828: Swift/UVOT Upper Limits
  87. SGR 0501+4516: Detection of possible optical counterpart
  88. GRB080825B: Swift/UVOT Upper Limits
  89. GRB 080828: Swift-XRT detection of a possible X-ray afterglow
  90. Swift trigger 322590: BAT detection of a possible burst
  91. GRB 080828: SuperAGILE GRB Localization
  92. Enhanced Swift-XRT position of SGR 0501+4516
  93. SGR 0501+4516: GMRT Radio Observation at 618 MHz
  94. GRB080823: Fermi Gamma-ray Burst Monitor detection
  95. GRB 080824: Fermi Gamma Ray Burst Monitor detection
  96. GRB080825C: GLAST Burst Monitor detection
  97. GRB 080825B: Swift-XRT team analysis
  98. GRB080825: Afterglow confirmation and redshift estimate
  99. Suzaku ToO Observation of SGR 0501+4516
  100. GRB 080825B - optical counterpart candidate

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