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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"

21925 results found.

  1. GRB 140419A: Swift-XRT refined Analysis
  2. GRB 140419A: Swift-BAT refined analysis
  3. GRB 140419A: Enhanced Swift-XRT position
  4. GRB 140419A: RATIR Optical and NIR Observations
  5. GRB 140419A: Swift detection of a burst with optical afterglow
  6. Konus-Wind observation of GRB 140416A
  7. GRB 140414A: Swift/UVOT Upper Limit
  8. GRB 140414A: Swift-XRT observations
  9. GRB 140414A: TNG optical observations
  10. GRB 140413A: Swift/UVOT Observations of the Optical Afterglow
  11. GRB 140412A: Swift/UVOT Upper Limits
  12. Konus-Wind observation of GRB 140413A
  13. GRB 140413A: Swift-XRT refined Analysis
  14. GRB 140413A: TAROT La Silla observatory optical observations
  15. GRB 140413A: Swift-XRT observations
  16. GRB 140412A: Enhanced Swift-XRT position
  17. GRB 140413A: GROND afterglow candidate
  18. GRB 140412A: Swift detection of a burst
  19. GRB 140408A: 1.5m OSN optical upper limit
  20. Swift Trigger 595345 is not an astrophysical source
  21. Swift-BAT trigger 595162 is noise
  22. GRB 140408A: MITSuME Akeno Optical observation
  23. Fermi418277210: iPTF optical observations
  24. GRB 140408A: RATIR Optical Upper Limits
  25. GRB 140408A: GROND Detection of an Afterglow Candidate
  26. GRB 140408A: Swift/UVOT Upper Limits
  27. GRB 140408A: MITSuME Okayama upper limits
  28. GRB 140408A: Enhanced Swift-XRT position
  29. GRB 140408A: Swift detection of a burst
  30. GRB 140402A: Deep limit on the optical afterglow from Magellan observations
  31. GRB 140331A: Continued RATIR Optical and NIR Observations
  32. GRB 140402A: MASTER optical observations
  33. GRB 140402A: Marginal BAT detection
  34. Swift trigger 594286: Is likely a noise trigger
  35. GRB 140301A: Zadko observatory - Gingin optical observations
  36. GRB 140331A: Swift/UVOT Upper Limits
  37. GRB 140302A: TAROT La Silla observatory optical observations
  38. GRB 140323A: Zadko observatory - Gingin optical observations
  39. GRB 140331A: Zadko observatory - Gingin optical observations
  40. GRB 140129B: AAO optical upper limit
  41. GRB 140129A: Mondy optical observations
  42. GRB 140331A: MITSuME Okayama upper limits
  43. GRB 140331A: Enhanced Swift-XRT position
  44. GRB 140331A: RATIR Optical and NIR Observations
  45. GRB 140331A: Swift detection of a burst
  46. GRB 140329A: Fermi-LAT detection
  47. Konus-Wind observation of GRB 140329A
  48. GRB 140320D: MASTER optical observations
  49. GRB 140329A: Fermi GBM observation of a bright burst
  50. GRB 140320D: Suzaku WAM observation of the prompt emission
  51. GRB 140323A : Suzaku WAM observation of the prompt emission
  52. GRB 140226A/iPTF14yb: Mondy optical observations
  53. GRB 140320C: Mondy optical observations and afterglow confirmation
  54. Konus-Wind observation of GRB 140323A
  55. GRB 140323A: Swift/UVOT Upper Limits
  56. GRB 140323A: Enhanced Swift-XRT position
  57. GRB 140323A: Swift detection of a burst
  58. GRB 140320A: RATIR Optical and NIR Observations
  59. Konus-Wind observation of GRB 140320D
  60. GRB 140320B: P60 detection of a very red afterglow
  61. IPN Triangulation of very intense GRB 140320D
  62. GRB 140320C: Mini-GWAC prompt observation
  63. GRB 140320C: Swift/UVOT Upper Limits
  64. GRB 140320B: Swift/UVOT Upper Limits
  65. GRB 140320A: Swift/UVOT Upper Limits
  66. GRB 140320C: Swift-XRT observations
  67. GRB 140320C: Swift-XRT detection of the X-ray afterglow
  68. GRB 140320B: Swift-XRT detection of the afterglow
  69. GRB 140320C: Mondy optical observations
  70. GRB 140320A: Enhanced Swift-XRT position
  71. GRB 140320A: Swift-XRT detection of an afterglow candidate
  72. GRB 140320C: MASTER optical observations
  73. GRB 140320C: FTN optical observations
  74. GRB 140320B: ISON-NM optical observations
  75. Swift Trigger 592558 is not an astrophysical source
  76. GRB 140318A: Continued RATIR Optical and NIR Observations
  77. GRB 140318A: Mondy optical limit
  78. GRB 140318A: Swift/UVOT Upper Limits
  79. GRB 140311B: Mondy optical limit
  80. GRB 140311A: Mondy optical limits
  81. GRB 140318A: Enhanced Swift-XRT position
  82. GRB 140318A: RATIR Optical and NIR Detections
  83. GRB140318A: Discovery Channel Telescope Optical Detection
  84. GRB 140318A: NOT detection of the afterglow
  85. GRB 140318A: Swift detection of a burst
  86. GRB140308A: Suzaku WAM observation of the prompt emission
  87. GRB 140311C: MASTER optical observations
  88. GRB 140311C: Swift-XRT and UVOT observations
  89. GRB 140311C: MASTER before, during and after trigger optical observations
  90. GRB 140311B: Swift-BAT refined analysis
  91. GRB 140311A: RATIR Optical and NIR Detection
  92. GRB 140311A: Montarrenti Observatory optical upper limit
  93. GRB 140311A: Swift/UVOT Upper Limits
  94. GRB 140311B: Swift/UVOT Upper Limits
  95. GRB 140311B: RATIR Optical and NIR Observations
  96. GRB 140311A: Bassano Bresciano Observatory optical upper limit
  97. GRB 140311A: Swift-XRT refined Analysis
  98. GRB 140302A: GROND confirmation of the afterglow
  99. GRB 140311A: NOT redshift confirmation
  100. GRB 140311A: Swift-BAT refined analysis

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