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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"

42265 results found.

  1. GRB080922: Swift-XRT upper limit
  2. GRB080922: A long GRB detected by INTEGRAL
  3. GRB 080913B: Fermi GBM detection
  4. Trigger 324561: IGR J08408-4503 detected by Swift
  5. GRB 080916C: Fermi GBM Spectral Analysis
  6. GRB 080919: Swift/UVOT Refined Analysis
  7. GRB 080919: Swift-XRT refined analysis
  8. GRB 080919, Swift-BAT refined analysis
  9. GRB 080916C: IRSF/SIRUS NIR Observation
  10. GRB 080916C: GROND Confirmation of the Optical Afterglow
  11. GRB 080916C: GROND Confirmation of the Optical Afterglow
  12. GRB 080919: REM NIR observations
  13. GRB 080919: Swift detection of a short burst
  14. GRB 080915A: GROND upper limits
  15. GRB080913: Swift-BAT spectral lag
  16. GRB 080916A: GROND lightcurve
  17. SGR 0501+4516: preliminary results of the Suzaku ToO observation
  18. GRB 080916A: Rapid PROMPT Observations
  19. GRB 080916A: Fermi GBM detection
  20. GRB 080916C: Swift XRT refined analysis
  21. GRB 080916B: Swift-XRT refined analysis
  22. Konus-Wind observation of GRB 080916A
  23. Konus-Wind observation of GRB 080916C
  24. GRB 080916C: GROND Detection of the Optical Afterglow Candidate
  25. GRB 080913: Konus-Wind and Swift/BAT joint spectral analysis
  26. GRB 080916C: Enhanced XRT position
  27. GRB080916A: Spectroscopic redshift
  28. GRB 080916C: Swift/XRT detection of possible afterglow
  29. GRB 080916B: Swift UVOT Refined Analysis
  30. IPN Triangulation and Energy Spectrum of GRB080916C
  31. GRB 080916B, Swift-BAT refined analysis
  32. GRB080916A: Refined Swift/UVOT Observations
  33. GRB 080915a, SMARTS optical/IR observations
  34. GRB 080916B: Enhanced Swift-XRT position
  35. GRB 080916C: Fermi LAT observation
  36. GRB 080916C: Fermi GBM Detection
  37. GRB 080916A: Swift XRT refined analysis
  38. GRB 080916A, Swift-BAT refined analysis
  39. GRB 080916B: Swift-XRT afterglow detection
  40. GRB 080916A: Enhanced Swift-XRT position
  41. GRB 080916B: Swift detection of a burst
  42. GRB 080916: REM detection of the NIR afterglow
  43. GRB 080916: REM candidate afterglow
  44. GRB 080916: Swift detection of a burst with optical afterglow
  45. GRB 080915B, Swift-BAT refined analysis
  46. GRB 080912 : Fermi GBM detection
  47. GRB 080915B: Swift detection of a burst
  48. GRB 080915: Swift/UVOT Upper Limits
  49. GRB 080915: Swift-XRT afterglow detection and analysis
  50. GRB 080915, Swift-BAT refined analysis
  51. SGR 0501+4516 : P200 i-band observations
  52. GRB 080915: ROTSE-III Optical Limits
  53. GRB 080915: Swift detection of a burst
  54. GRB 080913: Swift-XRT refined analysis
  55. GRB 080913: VLT/FORS spectrum
  56. GRB080913: Swift/UVOT Upper Limits
  57. GRB 080913: GROND photo-z
  58. GRB 080913, Swift-BAT refined analysis
  59. GRB 080913: VLT/FORS2 observations
  60. GRB 080913: Enhanced Swift-XRT position
  61. GRB 080913: GROND observation of a high-z optical/NIR afterglow candidate
  62. GRB 080913: Swift detection of a burst
  63. GRB 080906: Watcher observations
  64. Swift-BAT/-XRT refined analysis on trigger 324362 (LS I +61 303)
  65. GRB 080906B: Fermi GBM detection
  66. GRB 080905C: Fermi GBM detection
  67. SGR J0501+4516: radio pulsar searches with GBT and WSRT
  68. Swift trigger 324362 (LS I +61 303 ?): XRT
  69. GRB 080905B: Photometric Redshift for the 2MASS Galaxy
  70. Swift trigger 324362 (LS I +61 303 ?)
  71. GRB080905A: Swift/UVOT Upper Limits
  72. GRB 080905B: Watcher optical detection
  73. GRB 080904: Fermi Gamma-ray Burst Monitor detection
  74. GRB 080905B: Fermi Gamma-ray Burst Monitor detection
  75. GRB 080905A: Fermi Gamma-ray Burst Monitor detection
  76. GRB 080905A: Enhanced Swift-XRT position
  77. GRB 080905A: MITSuME Akeno optical upper limits
  78. Swift Trigger 324122 is again known source Swift J1842.5-1124
  79. Swift Trigger 324116 is known source again
  80. Swift Trigger 324112 is known source Swift J1842.5-1124
  81. GRB 080906: Refined Swift/UVOT Observations
  82. GRB 080906: Swift-XRT Refined Analysis
  83. GRB 080906, Swift-BAT refined analysis
  84. GRB 080905A: optical afterglow
  85. GRB 080906: GROND observations of the optical/NIR afterglow
  86. GRB 080905B: Swift-XRT Refined Analysis
  87. GRB 080905B: Refined UVOT Analysis
  88. GRB 080905B: VLT redshift
  89. GRB 080905A: NOT and VLT observations
  90. GRB 080905B: Enhanced Swift-XRT position
  91. GRB 080905B, Swift-BAT refined analysis
  92. GRB 080905A, Swift-BAT refined analysis
  93. GRB 080906: Swift detection of a burst with optical afterglow
  94. GRB 080905A: Swift-XRT Refined Analysis
  95. GRB 080825C: Fermi GBM Spectral Analysis
  96. GRB080825C: Fermi-LAT observations
  97. GRB 080905B: Swift detection of a burst with possible optical counterpart
  98. GRB 080905: R & I-band optical observations
  99. GRB 080905: Swift detection of a probably-short burst
  100. GRB 080903: Swift/UVOT Observations

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