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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"

42263 results found.

  1. GRB 080913B: Fermi GBM detection
  2. Trigger 324561: IGR J08408-4503 detected by Swift
  3. GRB 080916C: Fermi GBM Spectral Analysis
  4. GRB 080919: Swift/UVOT Refined Analysis
  5. GRB 080919: Swift-XRT refined analysis
  6. GRB 080919, Swift-BAT refined analysis
  7. GRB 080916C: IRSF/SIRUS NIR Observation
  8. GRB 080916C: GROND Confirmation of the Optical Afterglow
  9. GRB 080916C: GROND Confirmation of the Optical Afterglow
  10. GRB 080919: REM NIR observations
  11. GRB 080919: Swift detection of a short burst
  12. GRB 080915A: GROND upper limits
  13. GRB080913: Swift-BAT spectral lag
  14. GRB 080916A: GROND lightcurve
  15. SGR 0501+4516: preliminary results of the Suzaku ToO observation
  16. GRB 080916A: Rapid PROMPT Observations
  17. GRB 080916A: Fermi GBM detection
  18. GRB 080916C: Swift XRT refined analysis
  19. GRB 080916B: Swift-XRT refined analysis
  20. Konus-Wind observation of GRB 080916A
  21. Konus-Wind observation of GRB 080916C
  22. GRB 080916C: GROND Detection of the Optical Afterglow Candidate
  23. GRB 080913: Konus-Wind and Swift/BAT joint spectral analysis
  24. GRB 080916C: Enhanced XRT position
  25. GRB080916A: Spectroscopic redshift
  26. GRB 080916C: Swift/XRT detection of possible afterglow
  27. GRB 080916B: Swift UVOT Refined Analysis
  28. IPN Triangulation and Energy Spectrum of GRB080916C
  29. GRB 080916B, Swift-BAT refined analysis
  30. GRB080916A: Refined Swift/UVOT Observations
  31. GRB 080915a, SMARTS optical/IR observations
  32. GRB 080916B: Enhanced Swift-XRT position
  33. GRB 080916C: Fermi LAT observation
  34. GRB 080916C: Fermi GBM Detection
  35. GRB 080916A: Swift XRT refined analysis
  36. GRB 080916A, Swift-BAT refined analysis
  37. GRB 080916B: Swift-XRT afterglow detection
  38. GRB 080916A: Enhanced Swift-XRT position
  39. GRB 080916B: Swift detection of a burst
  40. GRB 080916: REM detection of the NIR afterglow
  41. GRB 080916: REM candidate afterglow
  42. GRB 080916: Swift detection of a burst with optical afterglow
  43. GRB 080915B, Swift-BAT refined analysis
  44. GRB 080912 : Fermi GBM detection
  45. GRB 080915B: Swift detection of a burst
  46. GRB 080915: Swift/UVOT Upper Limits
  47. GRB 080915: Swift-XRT afterglow detection and analysis
  48. GRB 080915, Swift-BAT refined analysis
  49. SGR 0501+4516 : P200 i-band observations
  50. GRB 080915: ROTSE-III Optical Limits
  51. GRB 080915: Swift detection of a burst
  52. GRB 080913: Swift-XRT refined analysis
  53. GRB 080913: VLT/FORS spectrum
  54. GRB080913: Swift/UVOT Upper Limits
  55. GRB 080913: GROND photo-z
  56. GRB 080913, Swift-BAT refined analysis
  57. GRB 080913: VLT/FORS2 observations
  58. GRB 080913: Enhanced Swift-XRT position
  59. GRB 080913: GROND observation of a high-z optical/NIR afterglow candidate
  60. GRB 080913: Swift detection of a burst
  61. GRB 080906: Watcher observations
  62. Swift-BAT/-XRT refined analysis on trigger 324362 (LS I +61 303)
  63. GRB 080906B: Fermi GBM detection
  64. GRB 080905C: Fermi GBM detection
  65. SGR J0501+4516: radio pulsar searches with GBT and WSRT
  66. Swift trigger 324362 (LS I +61 303 ?): XRT
  67. GRB 080905B: Photometric Redshift for the 2MASS Galaxy
  68. Swift trigger 324362 (LS I +61 303 ?)
  69. GRB080905A: Swift/UVOT Upper Limits
  70. GRB 080905B: Watcher optical detection
  71. GRB 080904: Fermi Gamma-ray Burst Monitor detection
  72. GRB 080905B: Fermi Gamma-ray Burst Monitor detection
  73. GRB 080905A: Fermi Gamma-ray Burst Monitor detection
  74. GRB 080905A: Enhanced Swift-XRT position
  75. GRB 080905A: MITSuME Akeno optical upper limits
  76. Swift Trigger 324122 is again known source Swift J1842.5-1124
  77. Swift Trigger 324116 is known source again
  78. Swift Trigger 324112 is known source Swift J1842.5-1124
  79. GRB 080906: Refined Swift/UVOT Observations
  80. GRB 080906: Swift-XRT Refined Analysis
  81. GRB 080906, Swift-BAT refined analysis
  82. GRB 080905A: optical afterglow
  83. GRB 080906: GROND observations of the optical/NIR afterglow
  84. GRB 080905B: Swift-XRT Refined Analysis
  85. GRB 080905B: Refined UVOT Analysis
  86. GRB 080905B: VLT redshift
  87. GRB 080905A: NOT and VLT observations
  88. GRB 080905B: Enhanced Swift-XRT position
  89. GRB 080905B, Swift-BAT refined analysis
  90. GRB 080905A, Swift-BAT refined analysis
  91. GRB 080906: Swift detection of a burst with optical afterglow
  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/UVOT Observations
  99. GRB 080903: Swift-XRT Refined Analysis
  100. GRB 080903: Enhanced Swift-XRT position

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