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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"

21948 results found.

  1. GRB 140703A: Swift detection of a burst
  2. GRB 140619C: Suzaku WAM observation of the prompt emission
  3. GRB 140629A: MITSuME Akeno Optical observation
  4. GRB 140629A: MASTER-Net preliminary light curve
  5. GRB 140629A: SAO RAS monitoring
  6. GRB 140629A: Nishi-Harima NIR Observations
  7. GRB 140629A: Swift/UVOT Detection
  8. GRB140629A: VATT optical observations
  9. GRB 140629A: P60 observations
  10. GRB 140629A: MITSuME Ishigakijima Optical Observation
  11. GRB 140629A: T100 observations
  12. GRB 140629A: NOT optical observations
  13. GRB 140629A: KWFC z-band photometry
  14. GRB 140629A: RTT150 optical observations
  15. GRB 140629A: Enhanced Swift-XRT position
  16. GRB 140629A: Swift detection of a burst with an optical counterpart
  17. GRB 140628A: GROND observation of the afterglow
  18. GRB 140628A: Swift-XRT refined Analysis
  19. GRB 140628A: Zadko observatory - Gingin optical observations
  20. GRB 140628A: Swift/UVOT Detection
  21. GRB 140628A: Swift/UVOT Detection
  22. GRB 140628A: Swift-XRT afterglow detection and enhanced position
  23. GRB 140626A: TAROT La Silla observatory optical observations
  24. GRB 140622A: TAROT La Silla observatory optical observations
  25. GRB 140628A: Swift detection of a burst
  26. GRB 140619B: Magellan near-infrared observations
  27. Swift Trigger 602668: XRT and UVOT confirm is not astrophysical source
  28. GRB 140623A: further Swift-XRT observations
  29. Swift Trigger 602668 is probably not an astrophysical source
  30. GRB 140626A: Swift/UVOT Upper Limits
  31. GRB 140626A: Enhanced Swift-XRT position
  32. GRB 140626A: GROND Afterglow Candidate
  33. GRB 140619B: Suzaku WAM observation of the prompt emission
  34. GRB 140626A: Swift detection of a burst
  35. GRB 140623A: Swift-XRT and UVOT observations
  36. GRB 140621A: Swift-XRT observations
  37. GRB 140622A: iTelescope.Net T11 Optical Observation
  38. GRB 140622A: Swift/UVOT Upper Limits
  39. Konus-Wind observation of GRB 140621A
  40. IPN Triangulation of GRB 140621A
  41. Konus-Wind observation of GRB 140619A
  42. GRB 140620A / iPTF14cva: Konkoly optical observations
  43. GRB 140622A: VLT/X-shooter redshift
  44. GRB 140622A: RATIR Optical and NIR Observations
  45. GRB 140622A: GROND Upper limits
  46. GRB 140622A: Enhanced Swift-XRT position
  47. GRB 140622A: Swift detection of a short burst
  48. GRB 140620A: Swift/UVOT Detection
  49. GRB 140606B / iPTF 14bfu: SAO RAS optical observations
  50. Konus-Wind observation of GRB 140619C
  51. GRB 140620A: Swift-XRT observations
  52. GRB 140620A / iPTF14cva: Fermi GBM observations
  53. GRB 140619A: Swift-BAT refined analysis
  54. GRB 140610A: TShAO optical upper limit
  55. GRB 140619B: Fermi-LAT Detection
  56. GRB 140619B: Fermi GBM detection of a short GRB
  57. GRB 140619A: Swift/UVOT Observations
  58. GRB 140619A: Enhanced Swift-XRT position
  59. GRB 140619A: Swift detection of a burst with a possible optical counterpart
  60. Swift-BAT trigger 601928: Detection of a possible outburst from V490 Cep
  61. GRB 140606B: Swift XRT final light curve
  62. GRB 140606A: BTA and OSN optical observations
  63. GRB 140614B: MOSFIRE Ks-band nondetection
  64. GRB 140614B: MITSuME Akeno upper limits
  65. GRB 140614B: MITSuME Okayama upper limits
  66. GRB 140614B: Swift-BAT refined analysis
  67. GRB 140606B / iPTF 14bfu: Mondy optical observations
  68. GRB 140614B: Swift/UVOT Upper Limits
  69. GRB 140614B: RATIR Optical and NIR Observations
  70. GRB 140606B / iPTF 14bfu: AAO optical observations
  71. GRB 140614A: Swift/UVOT Upper Limits
  72. GRB 140614B: Enhanced Swift-XRT position
  73. GRB 140614B: Swift detection of a burst
  74. GRB 140614A: Enhanced Swift-XRT position
  75. GRB 140614A: GROND afterglow candidate
  76. GRB 140614A: Swift detection of a burst
  77. Konus-Wind observation of GRB 140611A
  78. GRB 140610A: Swift-XRT refined Analysis
  79. GRB 140606B / iPTF 14bfu: MOSFIRE NIR imaging
  80. GRB 140611A Detection of a source in BAT ground analysis
  81. IPN Triangulation of GRB 140611A (short/hard)
  82. GRB 140610A: RATIR Optical and NIR Observations
  83. GRB 140610A: MASTER optical observations
  84. GRB 140610A: Swift/UVOT Upper Limits
  85. Konus-Wind observation of GRB 140610A
  86. Swift/XRT returns to normal observing
  87. GRB 140610A: Swift-XRT observations
  88. Konus-Wind observation of GRB 140606B
  89. GRB 140606B: Swift XRT refined analysis
  90. GRB 140521A: AAO optical upper limit
  91. GRB 140606A: AAO optical upper limit
  92. GRB 140606B: Swift/UVOT Upper Limits
  93. GRB140606B/iPTF14bfu: Discovery Channel Telescope Optical Detection
  94. GRB 140606B: Swift XRT position
  95. GRB 140606A: Nanshan optical upper limit
  96. GRB 140606A: Swift/UVOT Upper Limits
  97. GRB 140606A: Swift-XRT upper limits
  98. Konus-Wind observation of GRB 140604A
  99. GRB 140523A: further Swift-XRT observations
  100. Konus-Wind observation of GRB 140528A

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