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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"

45762 results found.

  1. Swift Trigger 602668 is probably not an astrophysical source
  2. GRB 140626A: Swift-BAT refined analysis
  3. GRB 140626A: Swift-XRT refined Analysis
  4. GRB 140626A: Swift/UVOT Upper Limits
  5. GRB 140626A: Enhanced Swift-XRT position
  6. GRB 140626A: GROND Afterglow Candidate
  7. GRB 140619B: Suzaku WAM observation of the prompt emission
  8. GRB 140626A: Swift detection of a burst
  9. Further Swift/XRT observations of GRB140620A/iPTFcva
  10. GRB140606B/iPTF14bfu: Keck detection of an associated supernova
  11. GRB 140620A / iPTF14cva: TShAO optical observations
  12. GRB 140624A: Fermi GBM observation of a short burst
  13. GRB 140623A: Swift-XRT and UVOT observations
  14. GRB 140623A / iPTF14cyb: Fermi GBM detection
  15. GRB 140621A: Swift-XRT observations
  16. GRB 140622A: iTelescope.Net T11 Optical Observation
  17. GRB 140621A: Fermi GBM detection
  18. GRB 140622A: Swift/UVOT Upper Limits
  19. Konus-Wind observation of GRB 140621A
  20. IPN Triangulation of GRB 140621A
  21. Konus-Wind observation of GRB 140619A
  22. Fermi 425193729 / iPTF14cyb: Discovery of optical afterglow
  23. GRB 140622A: KAIT Optical Upper Limit
  24. GRB 140620A / iPTF14cva: Konkoly optical observations
  25. GRB 140622A: Swift-XRT refined Analysis
  26. GRB 140622A: An unusual short event, Swift-BAT refined analysis
  27. GRB 140622A: VLT/X-shooter redshift
  28. GRB 140622A: RATIR Optical and NIR Observations
  29. GRB 140622A: GROND Upper limits
  30. GRB 140622A: Enhanced Swift-XRT position
  31. GRB 140622A: Swift detection of a short burst
  32. GRB 140620A: Swift/UVOT Detection
  33. GRB 140606B / iPTF 14bfu: SAO RAS optical observations
  34. Correction to GCN 16429 (GRB 140619C)
  35. Konus-Wind observation of GRB 140619C
  36. GRB 140620A: Swift-XRT observations
  37. IPN Triangulation of GRB 140619C (long/very intense)
  38. GRB 140620A / iPTF14cva: Fermi GBM observations
  39. Fermi 424934131 / iPTF14cva: Discovery and Redshift of Optical Afterglow
  40. GRB 140619B: Swift-XRT observations
  41. GRB 140619A: Swift-BAT refined analysis
  42. GRB 140610A: TShAO optical upper limit
  43. GRB 140619B: Fermi-LAT Detection
  44. GRB 140619B: Fermi GBM detection of a short GRB
  45. GRB 140619A: Swift/UVOT Observations
  46. GRB 140619A: Swift-XRT refined Analysis
  47. GRB 140619A: Enhanced Swift-XRT position
  48. GRB 140619A: Swift detection of a burst with a possible optical counterpart
  49. Swift trigger 601928 is V490 Cep: BAT+XRT refined analysis.
  50. Swift-BAT trigger 601928: Detection of a possible outburst from V490 Cep
  51. GRB 140606B: Swift XRT final light curve
  52. GRB 140606A: BTA and OSN optical observations
  53. GRB 140614C: 1.23m CAHA (+EDIPO) observations
  54. GRB 140614B: MOSFIRE Ks-band nondetection
  55. GRB 140614C found in ground analysis of BAT data
  56. GRB 140614B: MITSuME Akeno upper limits
  57. GRB 140614B: Swift-XRT refined Analysis
  58. GRB 140614B: MITSuME Okayama upper limits
  59. GRB 140614B: Swift-BAT refined analysis
  60. GRB 140606B / iPTF 14bfu: Mondy optical observations
  61. GRB 140614A: Swift-BAT refined analysis
  62. GRB 140614A: X-shooter redshift
  63. GRB 140614B: Swift/UVOT Upper Limits
  64. GRB 140614B: RATIR Optical and NIR Observations
  65. GRB 140606B / iPTF 14bfu: AAO optical observations
  66. GRB 140614A: Swift/UVOT Upper Limits
  67. GRB 140614A: Swift-XRT refined Analysis
  68. GRB 140614B: Enhanced Swift-XRT position
  69. GRB 140614B: Swift detection of a burst
  70. GRB 140614A: Enhanced Swift-XRT position
  71. GRB 140614A: GROND afterglow candidate
  72. GRB 140614A: Swift detection of a burst
  73. GRB 140611A: Swift-XRT observations
  74. Konus-Wind observation of GRB 140611A
  75. GRB 140610A: Swift-XRT refined Analysis
  76. GRB 140606B / iPTF 14bfu: MOSFIRE NIR imaging
  77. GRB 140611A Detection of a source in BAT ground analysis
  78. GRB 140610A: Fermi GBM Detection
  79. IPN Triangulation of GRB 140611A (short/hard)
  80. GRB 140610A: RATIR Optical and NIR Observations
  81. GRB 140610A: Swift-BAT refined analysis
  82. GRB 140610A: MASTER optical observations
  83. GRB 140610A: Swift/UVOT Upper Limits
  84. Konus-Wind observation of GRB 140610A
  85. Swift/XRT returns to normal observing
  86. GRB140606B: DCT time of observation correction
  87. GRB 140610A: Swift-XRT observations
  88. GRB 140610A: Swift detection of a burst
  89. Konus-Wind observation of GRB 140606B
  90. GRB 140606B: Swift XRT refined analysis
  91. GRB 140521A: AAO optical upper limit
  92. GRB 140606A: AAO optical upper limit
  93. GRB 140607A: Swift-BAT refined analysis
  94. IPN Triangulation of GRB 140606B
  95. GRB 140606B: Swift/UVOT Upper Limits
  96. GRB140606B/iPTF14bfu: Discovery Channel Telescope Optical Detection
  97. GRB 140606B: Swift XRT position
  98. GRB 140606B / Fermi 432717114 / iPTF 14bfu: Keck redshift
  99. GRB 140607A: Swift detection of a burst
  100. GRB 140606B: Fermi GBM detection

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