Skip to main content
End of Swift Science Operations, CHIME Notices Unavailable During Upgrade. See news and announcements

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"

19318 results found.

  1. GRB 080723, Swift-BAT refined analysis
  2. GRB 080723B: AGILE GRID and MCAL results
  3. GRB 080723A: Swift-XRT refined analysis
  4. GRB 080723B: Detection and Localization by SuperAGILE
  5. GRB 080721 : Lulin 2nd optical follow-ups
  6. GRB 080721: Swift-XRT refined analysis
  7. GRB 080721, Swift-BAT refined analysis
  8. GRB 080721 : Lulin Optical follow-ups
  9. GRB 080721: Swift detection of a burst with a bright optical counterpart.
  10. Trigger 317205: Swift detection of an outburst from XTE J1701-407
  11. Konus-Wind observation of GRB 080714
  12. GRB 080714: Swift-BAT refined analysis
  13. GRB 080714: Swift detection of a burst
  14. GRB 080702B: Swift XRT confirmation of the afterglow
  15. GRB 080710, Swift-BAT refined analysis
  16. GRB 0800707: optical observations
  17. GRB 080710: Swift-XRT refined analysis
  18. GRB080710: Swift/UVOT observations
  19. New Swift-XRT GRB products available online.
  20. GRB 080707, Swift-BAT refined analysis
  21. GRB 080707: Swift XRT refined analysis
  22. GRB 080707: Swift detection of a burst
  23. Refined analysis of Swift Trigger 316063, is IGR J08408-4503
  24. Trigger 316063: Swift detection of a transient
  25. GRB 080703: UVOT Follow-Up Observation
  26. GRB 080703, Swift-BAT refined analysis
  27. GRB 080702B Swift-BAT refined analysis
  28. GRB 080703: Swift detection of a burst with optical afterglow
  29. GRB 080703A: ROTSE-III Detection of Optical Counterpart
  30. GRB 080702B: Swift XRT and UVOT observations
  31. GRB 080625: Suzaku WAM observation of the prompt emission
  32. GRB 080702A, Swift-BAT refined analysis
  33. GRB 080702A: Swift-XRT Team refined analysis
  34. Swift Trigger 315630: Probably not a GRB
  35. TLS I-Band Observation of GRB 080701A
  36. GRB 080701A, Swift-BAT refined analysis
  37. GRB 080701: Swift detection of a burst
  38. GRB 080623: Suzaku WAM observation of the prompt emission
  39. GRB 080625:Swift-XRT detection of the afterglow
  40. GRB 080625: Swift/UVOT Detection of an Optical Afterglow
  41. GRB 080625: Gamma Ray Burst Localization by SuperAGILE
  42. GRB 080623: Swift-XRT refined analysis
  43. GRB 080623, Swift-BAT refined analysis
  44. GRB 080623: Swift detection of a burst
  45. Swift trigger 314975 is not a GRB
  46. GRB 070809: Putative host galaxy and redshift
  47. VLA upper limit on INTEGRAL burst GRB 080613A
  48. GRB 080613A: Swift-XRT detection of the afterglow
  49. GRB 080613B, Swift-BAT refined analysis
  50. GRB 080613B: Swift-XRT refined analysis
  51. GRB 080613B: Swift detection of a burst
  52. GRB 080613 : a long GRB detected with INTEGRAL
  53. GRB 080603A: final Swift-XRT observations.
  54. GRB 080607: AGILE-MCAL observation of the prompt emission
  55. GRB 080605: TLS 3rd Epoch - Source Confusion
  56. GRB 080603A: optical observations
  57. GRB 080607: Swift-XRT refined analysis
  58. Swift/UVOT Observations of GRB080607
  59. GRB 080607, Swift-BAT refined analysis
  60. GRB 080607: Swift detection of a burst with optical afterglow
  61. GRB 080607: ROTSE-III Detection of Optical Counterpart
  62. GRB 080605: TLS RRM Analysis, Plateau/Rebrightening, Red OT
  63. GRB 080605: Swift-UVOT refined analysis
  64. GRB 080605, Swift-BAT refined analysis
  65. GRB 080605, Swift-BAT refined analysis
  66. GRB 080605: Swift-XRT refined analysis
  67. GRB 080605: Swift detection of a burst with an optical afterglow
  68. GRB 080604, Swift-BAT refined analysis
  69. GRB 080604: Swift-XRT refined analysis
  70. Konus-Wind observation of GRB 080603B
  71. GRB 080603B: Swift-XRT refined analysis
  72. GRB 080603A: Swift-XRT detection of the afterglow
  73. GRB 080430: optical observations
  74. GRB 080603B: Swift/UVOT detection of the afterglow
  75. GRB 080603B, Swift-BAT refined analysis
  76. GRB080603B: RTT150 optical observations, break in light curves
  77. GRB 080604: Swift detection of a burst with an optical afterglow
  78. GRB 080603B: Swift detection of a burst with optical afterglow
  79. GRB 080603B: ROTSE-III Detection of Optical Counterpart
  80. GRB 080603: A long GRB detected by INTEGRAL
  81. SGR 1627-41: Chandra/RXTE/Swift Observations Scheduled
  82. GRB 080602, Swift-BAT refined analysis
  83. GRB 080602: Swift-XRT refined analysis
  84. Konus-Wind observation of GRB 080602
  85. Konus-Wind observation of reactivation of SGR 1627-41
  86. GRB 080524: Swift-BAT detection of a burst in ground analysis
  87. GRB 080523: Swift-XRT refined analysis
  88. GRB 080523, Swift-BAT refined analysis
  89. GRB 080515: Swift-XRT position and analysis
  90. GRB 080520, Swift-BAT refined analysis
  91. GRB 080514B: Suzaku WAM observation of the prompt emission
  92. Konus-Wind observation of GRB 080514B
  93. GRB 080514B: second epoch Swift XRT data confirms the X-ray afterglow
  94. GRB 080517, Swift-BAT refined analysis
  95. GRB 080517: Swift-XRT refined analysis
  96. GRB 080516, GROND 2nd epoch observations
  97. GRB 080516, GROND observations
  98. GRB 080516: Swift-XRT Team refined analysis
  99. GRB 080516, Swift-BAT refined analysis
  100. GRB 080514B : redshift estimation

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
Want to contribute code to GCN?
Get involved on GitHub.

gcn.nasa.gov

A service of the Astrophysics Science Division at NASA Goddard Space Flight Center

Looking for U.S. government information and services? Visit USA.gov