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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"

43864 results found.

  1. GRB 140624A: Fermi GBM observation of a short burst
  2. GRB 140623A: Swift-XRT and UVOT observations
  3. GRB 140623A / iPTF14cyb: Fermi GBM detection
  4. GRB 140621A: Swift-XRT observations
  5. GRB 140622A: iTelescope.Net T11 Optical Observation
  6. GRB 140621A: Fermi GBM detection
  7. Konus-Wind observation of GRB 140621A
  8. IPN Triangulation of GRB 140621A
  9. Konus-Wind observation of GRB 140619A
  10. Fermi 425193729 / iPTF14cyb: Discovery of optical afterglow
  11. GRB 140620A / iPTF14cva: Konkoly optical observations
  12. GRB 140622A: Swift-XRT refined Analysis
  13. GRB 140622A: An unusual short event, Swift-BAT refined analysis
  14. GRB 140622A: VLT/X-shooter redshift
  15. GRB 140622A: RATIR Optical and NIR Observations
  16. GRB 140622A: GROND Upper limits
  17. GRB 140622A: Enhanced Swift-XRT position
  18. GRB 140622A: Swift detection of a short burst
  19. GRB 140620A: Swift/UVOT Detection
  20. GRB 140606B / iPTF 14bfu: SAO RAS optical observations
  21. Konus-Wind observation of GRB 140619C
  22. GRB 140620A: Swift-XRT observations
  23. IPN Triangulation of GRB 140619C (long/very intense)
  24. GRB 140620A / iPTF14cva: Fermi GBM observations
  25. Fermi 424934131 / iPTF14cva: Discovery and Redshift of Optical Afterglow
  26. GRB 140619B: Swift-XRT observations
  27. GRB 140619A: Swift-BAT refined analysis
  28. GRB 140610A: TShAO optical upper limit
  29. GRB 140619B: Fermi-LAT Detection
  30. GRB 140619B: Fermi GBM detection of a short GRB
  31. GRB 140619A: Swift/UVOT Observations
  32. GRB 140619A: Swift-XRT refined Analysis
  33. GRB 140619A: Enhanced Swift-XRT position
  34. GRB 140619A: Swift detection of a burst with a possible optical counterpart
  35. Swift trigger 601928 is V490 Cep: BAT+XRT refined analysis.
  36. Swift-BAT trigger 601928: Detection of a possible outburst from V490 Cep
  37. GRB 140606B: Swift XRT final light curve
  38. GRB 140606A: BTA and OSN optical observations
  39. GRB 140614C: 1.23m CAHA (+EDIPO) observations
  40. GRB 140614B: MOSFIRE Ks-band nondetection
  41. GRB 140614C found in ground analysis of BAT data
  42. GRB 140614B: Swift-XRT refined Analysis
  43. GRB 140614B: Swift-BAT refined analysis
  44. GRB 140606B / iPTF 14bfu: Mondy optical observations
  45. GRB 140614A: Swift-BAT refined analysis
  46. GRB 140614A: X-shooter redshift
  47. GRB 140614B: RATIR Optical and NIR Observations
  48. GRB 140606B / iPTF 14bfu: AAO optical observations
  49. GRB 140614A: Swift-XRT refined Analysis
  50. GRB 140614B: Enhanced Swift-XRT position
  51. GRB 140614B: Swift detection of a burst
  52. GRB 140614A: Enhanced Swift-XRT position
  53. GRB 140614A: GROND afterglow candidate
  54. GRB 140614A: Swift detection of a burst
  55. GRB 140611A: Swift-XRT observations
  56. Konus-Wind observation of GRB 140611A
  57. GRB 140610A: Swift-XRT refined Analysis
  58. GRB 140606B / iPTF 14bfu: MOSFIRE NIR imaging
  59. GRB 140611A Detection of a source in BAT ground analysis
  60. GRB 140610A: Fermi GBM Detection
  61. IPN Triangulation of GRB 140611A (short/hard)
  62. GRB 140610A: RATIR Optical and NIR Observations
  63. GRB 140610A: Swift-BAT refined analysis
  64. GRB 140610A: MASTER optical observations
  65. GRB 140610A: Swift/UVOT Upper Limits
  66. Konus-Wind observation of GRB 140610A
  67. Swift/XRT returns to normal observing
  68. GRB140606B: DCT time of observation correction
  69. GRB 140610A: Swift-XRT observations
  70. GRB 140610A: Swift detection of a burst
  71. Konus-Wind observation of GRB 140606B
  72. GRB 140606B: Swift XRT refined analysis
  73. GRB 140521A: AAO optical upper limit
  74. GRB 140606A: AAO optical upper limit
  75. GRB 140607A: Swift-BAT refined analysis
  76. IPN Triangulation of GRB 140606B
  77. GRB140606B/iPTF14bfu: Discovery Channel Telescope Optical Detection
  78. GRB 140606B: Swift XRT position
  79. GRB 140606B / Fermi 432717114 / iPTF 14bfu: Keck redshift
  80. GRB 140607A: Swift detection of a burst
  81. GRB 140606B: Fermi GBM detection
  82. Fermi 423717114: Additional P48 and P60 observations
  83. GRB 140606A: BOOTES-2 optical upper limit
  84. Fermi423717114: iPTF optical transient candidates
  85. GRB 140606A: Nanshan optical upper limit
  86. GRB 140606A: Swift-XRT upper limits
  87. Swift XRT status update
  88. Swift Trigger 600914 is noise
  89. GRB 140606A: Swift-BAT refined analysis
  90. GRB 140606A: Swift detection of a short hard burst
  91. Swift Trigger 600914 is probably a noise fluctuation
  92. Konus-Wind observation of GRB 140604A
  93. IPN Triangulation of GRB 140604A (short/hard)
  94. Swift XRT is off-line
  95. GRB 140523A: further Swift-XRT observations
  96. GRB 140528A: Fermi GBM Detection
  97. GRB 140529A BAT refined analysis
  98. Konus-Wind observation of GRB 140529A
  99. Konus-Wind observation of GRB 140528A
  100. GRB 140529A: Swift-XRT afterglow detection.

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