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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"

19662 results found.

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

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