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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"

19663 results found.

  1. GRB 140614A: Swift-XRT refined Analysis
  2. GRB 140614B: Enhanced Swift-XRT position
  3. GRB 140614B: Swift detection of a burst
  4. GRB 140614A: Enhanced Swift-XRT position
  5. GRB 140614A: GROND afterglow candidate
  6. GRB 140614A: Swift detection of a burst
  7. GRB 140611A: Swift-XRT observations
  8. Konus-Wind observation of GRB 140611A
  9. GRB 140610A: Swift-XRT refined Analysis
  10. GRB 140611A Detection of a source in BAT ground analysis
  11. GRB 140610A: Fermi GBM Detection
  12. IPN Triangulation of GRB 140611A (short/hard)
  13. GRB 140610A: RATIR Optical and NIR Observations
  14. GRB 140610A: Swift-BAT refined analysis
  15. GRB 140610A: MASTER optical observations
  16. GRB 140610A: Swift/UVOT Upper Limits
  17. Konus-Wind observation of GRB 140610A
  18. Swift/XRT returns to normal observing
  19. GRB 140610A: Swift-XRT observations
  20. GRB 140610A: Swift detection of a burst
  21. GRB 140606B: Swift XRT refined analysis
  22. GRB 140521A: AAO optical upper limit
  23. GRB 140606A: AAO optical upper limit
  24. GRB 140607A: Swift-BAT refined analysis
  25. GRB 140606B: Swift/UVOT Upper Limits
  26. GRB 140606B: Swift XRT position
  27. GRB 140607A: Swift detection of a burst
  28. GRB 140606A: BOOTES-2 optical upper limit
  29. GRB 140606A: Swift/UVOT Upper Limits
  30. GRB 140606A: Swift-XRT upper limits
  31. Swift XRT status update
  32. Swift Trigger 600914 is noise
  33. GRB 140606A: Swift-BAT refined analysis
  34. GRB 140606A: Swift detection of a short hard burst
  35. Swift Trigger 600914 is probably a noise fluctuation
  36. Swift XRT is off-line
  37. GRB 140523A: further Swift-XRT observations
  38. GRB 140529A BAT refined analysis
  39. GRB 140529A: Swift/UVOT Upper Limits
  40. GRB 140529A: Swift-XRT afterglow detection.
  41. GRB 140408A: Withdrawal of afterglow candidate
  42. GRB 140529A found in ground analysis of BAT slew data
  43. Swift Trigger 600114 in M31: UVOT Observations
  44. Swift trigger 600114 is not an outbursting X-ray source
  45. Swift Trigger 600114: Optical spectroscopy from GTC
  46. Swift Trigger 600114: Preliminary BAT analysis
  47. Swift Trigger 600114 in M31: Archival and Prompt UVOT Imaging
  48. Swift detection of a bright X-ray source in M31
  49. Swift detection of SFXT IGR J17544-2619
  50. GRB 140523A: NOT observation
  51. IPN Triangulation of GRB 140523A
  52. Swift trigger 599860 probably not real
  53. GRB 140523A: possible X-ray afterglow candidate from tiled Swift/XRT observations
  54. GRB 140523A Tiled Swift observations
  55. GRB 140523A: Fermi-LAT detection
  56. GRB 140521A: Fermi GBM Detection
  57. GRB 140423A: TShAO optical observations
  58. GRB 140521A: AAO optical observations
  59. GRB 140521A: Swift-BAT refined analysis
  60. GRB 140521A: AROMA-N Optical Observation
  61. GRB 140516A: further Swift-XRT analysis
  62. GRB 140521A: MASTER optical observations
  63. GRB 140521A: Swift detection of a burst
  64. GRB 140518A: T100 observations
  65. GRB 140512A: MASTER prompt and afterglow optical observations
  66. GRB 140518A, Swift-BAT refined analysis
  67. GRB 140518A: Swift-XRT refined Analysis
  68. GRB 140518A: Skynet GORT Detections of the Optical Afterglow
  69. GRB 140518A: Swift/UVOT Upper Limits
  70. GRB 140518A: RATIR Optical and NIR Observations
  71. GRB 140518A: P60 i-/z-band detections
  72. GRB 140518A: KAIT optical candidate
  73. GRB 140518A: Swift detection of a burst
  74. GRB 140516A: RATIR Optical and NIR Observations
  75. GRB 140516A: Swift/UVOT Upper Limits
  76. GRB 140516A: Swift-BAT refined analysis
  77. GRB 140516A: Swift-XRT refined Analysis
  78. GRB 140516A: Enhanced Swift-XRT position
  79. GRB 140516A: MASTER early optical observations
  80. GRB 140516A: Swift detection of a short burst
  81. GRB 140515A: Swift-BAT refined analysis
  82. GRB 140419A: Continued Mondy optical observations
  83. GRB 140515A: GROND observation of the afterglow
  84. GRB 140515A: Swift-XRT refined Analysis
  85. GRB 140515A: KAIT Optical Upper Limit
  86. GRB 140515A: Swift/UVOT Upper Limits
  87. GRB 140423A: HCT optical observations
  88. GRB 140515A: Enhanced Swift-XRT position
  89. Trigger 599041: Swift detection of SFXT IGR J16479-4514
  90. GRB 140515A: Swift detection of a burst
  91. Konus-Wind observation of GRB 140512A
  92. GRB 140423A: AAO optical upper limits
  93. GRB 140512A: Continued UVOT Observations
  94. GRB 140512A: Fermi GBM detection
  95. GRB 140508A: Mondy upper limit
  96. GRB 140512A: Swift-BAT refined analysis
  97. GRB 140512A: Swift-XRT refined Analysis
  98. GRB 140512A: Enhanced Swift-XRT position
  99. Swift Observations of GRB 140508A
  100. GRB 140428A: GROND afterglow confirmation

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