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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"

41937 results found.

  1. GRB 140103A: AAO optical afterglow candidate
  2. GRB 140104B: Further Swift XRT observations
  3. GRB 140114A: RATIR Optical and NIR Afterglow Detection
  4. Fermi Gamma-ray Burst Monitor trigger 411362827 is not a GRB
  5. GRB 140102A: AAO optical upper limits
  6. GRB 140114A: P60 Observations
  7. GRB 140114A: Swift detection of a burst
  8. GRB 140108A: Konkoly optical observations
  9. GRB 140110A: Swift/UVOT retraction of UVOT candidates
  10. IPN Triangulation of GRB 140110A
  11. GRB 140110A: Swift/UVOT Observations
  12. GRB 140108A: Suzaku WAM observation of the prompt emission
  13. GRB 140104B: Suzaku WAM observation of the prompt emission
  14. GRB 140110A: Swift XRT observations
  15. GRB 140110A: Reported UVOT OT not GRB afterglow
  16. GRB 140110A: OT detection in Swift/UVOT imaging
  17. GRB 140108A BAT refined analysis update *CORRECTION*
  18. GRB 140108A BAT refined analysis update
  19. GRB 140110A: Fermi GBM observation
  20. GRB 140110A Tiled Swift observations
  21. GRB 140110A: Fermi-LAT detection of a burst
  22. GRB 140108A: Mondy optical upper limit
  23. GRB 140105A: MASTER-Net early optical observations and time correction
  24. GRB 131231A: AAO optical observations
  25. GRB 140108A: Swift-BAT refined analysis
  26. GRB 140108A: Fermi GBM detection
  27. GRB 140108A: Swift/UVOT Detection
  28. GRB 140108A: theoretical prediction of redshift and of supernova occurrence
  29. GRB 140108A: Swift-XRT refined Analysis
  30. GRB 140108A: Mondy optical observations
  31. GRB 140108A: D50+BART optical candidate detection
  32. GRB 140108A: 1.23m CAHA observations
  33. GRB 140108A: MASTER-Net OT detection
  34. GRB 140108A: Swift detection of a burst
  35. New Fermi-LAT GRB Table
  36. GRB 140105A: HCT Observations
  37. GRB 140105A: continued iPTF observations and rejection of optical candidates
  38. Swift-BAT triggered on KS 1947+300
  39. GRB 140105A: Swift XRT observations
  40. GRB 140103A: Swift XRT afterglow confirmation
  41. GRB 140105A/Fermi410578384: MASTER-Net early optical observations
  42. GRB 140104B: Swift XRT observations
  43. GRB 140102A: Swift/UVOT Detection
  44. LOAO R-band Observation of GRB 140102A
  45. GRB 140105A: Fermi GBM detection
  46. GRB 140104B: Fermi GBM observation
  47. Fermi410578384: iPTF optical afterglow candidates for a possible short GRB
  48. GRB 140102A: BOOTES-4 early optical observations
  49. GRB 140104B: Fermi-LAT detection of a burst
  50. GRB 131209A: Further Swift XRT observations
  51. GRB 140103A: Lulin Optical r-band Observations
  52. GRB 131231A : Lulin Optical Observations
  53. GRB 131231A: CARMA 3mm detection
  54. Swift-BAT trigger 582894 is HR 1099 (Flare star)
  55. GRB140104A : Xinglong TNT observation. A bright star is located nearby
  56. GRB 140102A, Optical Observations
  57. GRB 131231A, Optical Observations
  58. GRB 140103A: P60 Observations
  59. GRB 140102A: P60 observations
  60. GRB 131231A: Swift/UVOT Observations of the Optical Afterglow
  61. GRB 131231A: Fermi GBM correction to GCN 15644
  62. GRB 140103A: Swift/UVOT Upper Limits
  63. Konus-Wind observation of GRB 131231A
  64. GRB 140102A: Fermi/GBM Observation
  65. GRB 131229A: Suzaku WAM observation of the prompt emission
  66. Konus-Wind observation of GRB 140102A
  67. GRB 140103A: Swift-XRT refined analysis
  68. GRB 140102A: GROND observations
  69. GRB 140103A, Swift-BAT refined analysis
  70. GRB 140102A: MAXI/GSC detection
  71. GRB 140102A, Swift-BAT refined analysis
  72. GRB 140102A: Swift-XRT refined Analysis
  73. GRB 140103A: MASTER-Net optical observations
  74. GRB 140102A: Fermi-LAT detection of a burst
  75. GRB 140102A: I-band observations from IAC80 and 1.23m CAHA telescopes
  76. GRB 140103A: Swift detection of a burst
  77. GRB 140102A: Early optical observations from Nanshan
  78. GRB 131224B detected in ground analysis of Swift-BAT data
  79. GRB 140102A: Swift detection of a burst with optical counterpart
  80. GRB 131231A: Gemini-South Redshift
  81. GRB 131229A: Fermi GBM detection
  82. GRB 131231A: P60 observations
  83. GRB 131227A: KAIT light curve analysis
  84. GRB 131231A: Swift-XRT observations
  85. GRB 131231A : xinglong TNT optical observation
  86. GRB 131231A: MDM afterglow observation
  87. GRB 131231A: VLT/X-shooter redshift
  88. GRB 131231A: Fermi GBM detection
  89. GRB 131231A: iPTF optical afterglow candidate coincident with Nanshan detection
  90. GRB 131231A: afterglow confirmation from the NOT
  91. GRB 131231A: Nanshan afterglow candidate
  92. GRB 131231A: Fermi-LAT detection of a burst
  93. Konus-Wind observation of GRB 131229A
  94. GRB 131229A: CARMA 3mm observations
  95. GRB 131229A: Magellan upper limit
  96. GRB 131229A: GROND observations
  97. GRB 131229A: Swift-BAT refined analysis
  98. GRB 131229A: Swift-XRT refined Analysis
  99. GRB 131229A: Swift/UVOT Upper Limits
  100. GRB 131227A: GROND Upper Limits

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