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"

19670 results found.

  1. GRB 130727A: Swift/UVOT Detection
  2. Konus-Wind observation of GRB 130727A
  3. GRB 130727A: Swift-XRT refined Analysis
  4. GRB 130727A: Fermi GBM detection
  5. GRB 130727A: GROND observations
  6. GRB 130727A: Enhanced Swift-XRT position
  7. GRB 130727A: Swift-BAT refined analysis
  8. GRB 130727A: Swift-XRT observations
  9. GRB 130727A: Swift-XRT and Swift-UVOT prompt observations
  10. GRB 130727A: Swift detection of a burst
  11. GRB 130725B: Swift/UVOT Observations
  12. GRB 130725B: Swift trigger time correction
  13. GRB 130725A: Swift-XRT refined Analysis
  14. GRB 130725B, Swift-BAT refined analysis
  15. GRB 130725B: Swift-XRT refined Analysis
  16. GRB 130725B - UVOT-enhanced XRT position
  17. GRB 130725A: Swift/UVOT Upper Limits
  18. GRB 130725A - Faulkes Telescope South Observations
  19. GRB 130725B: GROND Detection of the Optical/NIR Afterglow
  20. GRB 130725B: Swift/UVOT Detection of an Optical Counterpart
  21. GRB 130725A, Swift-BAT refined analysis
  22. GRB 130719A: Skynet/PROMPT observations
  23. GRB 130725B: Swift detection of a burst
  24. Swift Trigger 563980 is GRB 130725A
  25. Swift Trigger 563980 cannot be identified at this time.
  26. Retraction of GCN Circ. 15020 (GRB 130722C Tiled Swift observations)
  27. Konus-Wind observation of GRB 130722A
  28. GRB 130722A: Swift/UVOT Detection
  29. GRB 130722C Tiled Swift observations
  30. GRB 130722A: Enhanced Swift-XRT position
  31. GRB 130722A: Swift-XRT refined Analysis
  32. GRB 130722A: Skynet/GORT observations
  33. GRB 130719A, Swift-BAT refined analysis
  34. GRB 130715A: Suzaku WAM observation of the prompt emission
  35. GRB 130722A: Swift detection of a burst
  36. GRB 130719A: Swift detection of a burst
  37. GRB 130716A: Fermi GBM observation
  38. GRB 130716A Swift-BAT Spectral lag analysis
  39. GRB 130716A: UVOT Upper Limits
  40. GRB 130716A: Probable short-hard burst with delayed Swift data
  41. GRB 130626A: Retraction of possible X-ray afterglow
  42. GRB 130708A: Swift XRT and UVOT Observations
  43. GRB 130708A: Fermi GBM observation
  44. GRB 130708A found in ground analysis of Swift-BAT data
  45. GRB 130628A: Suzaku WAM observation of the prompt emission
  46. GRB 130702A: Continued UVOT Observations
  47. GRB 130702A: further Swift-XRT observations
  48. Fermi GRB 130702A: Swift XRT and UVOT observations
  49. Fermi394416326: iPTF detection of a possible optical afterglow
  50. GRB 130627B: Swift afterglow confirmation
  51. GRB 130623A: Second Swift-XRT observation
  52. GRB 130701A: Swift-XRT refined Analysis
  53. GRB 130701A: P60 Observations
  54. GRB 130701A, Swift-BAT refined analysis
  55. Konus-Wind observation of GRB 130701A
  56. GRB 130701A: Swift/UVOT Detection
  57. GRB 130701A: Enhanced Swift-XRT position
  58. GRB 130701A: Swift detection of a burst
  59. GRB 130627B, Swift-BAT refined analysis
  60. GRB 130627A, Swift-BAT refined analysis
  61. GRB 130627B: Swift/UVOT Upper Limits
  62. GRB 130627A: Swift/UVOT Upper Limits
  63. GRB 130627A: Swift-XRT refined Analysis
  64. GRB 130627B: Possible Swift-XRT afterglow detection
  65. Swift trigger 559221 is likely a false trigger coincident with IGR J17544-2619
  66. GRB 130627A: Enhanced Swift-XRT position
  67. GRB 130626A: RATIR Optical Observations
  68. GRB 130626A, Swift-BAT refined analysis
  69. GRB 130627A: Fermi GBM detection
  70. GRB 130623A: Fermi GBM detection
  71. GRB130627B: Swift/UVOT Observations
  72. GRB 130627B: Swift-XRT observations
  73. GRB 130626A: Swift-XRT possible detection and UVOT upper limits
  74. GRB 130627B: Swift detection of a burst
  75. GRB 130627A: Swift-XRT observations
  76. GRB 130627A: Swift/UVOT Observation
  77. GRB 130627A: Swift detection of a burst
  78. Swift Trigger 559108 is not astrophysical
  79. GRB 130626A: Swift detection of a short burst
  80. GRB 130625A: Swift-XRT refined Analysis
  81. GRB 130625A: MASTER afterglow limit
  82. GRB 130625A: Swift/UVOT Upper Limits
  83. GRB 130623A: Swift-XRT and UVOT observations
  84. GRB 130625A: Swift-BAT refined analysis
  85. GRB 130625A: Enhanced Swift-XRT position
  86. GRB 130625A: Swift detection of a burst
  87. GRB 130603B: First epoch of XMM-Newton observations
  88. GRB 130623A detected in ground analysis of Swift-BAT data
  89. Swift Trigger 558828 is not an interesting event
  90. Swift Trigger 558631: AAO optical observations
  91. GRB 130614A: Suzaku WAM observation of the prompt emission
  92. Swift Trigger 558631 is not a real source
  93. GRB 130612A: Swift-BAT refined analysis
  94. GRB 130612A: Continued Skynet/PROMPT/GORT/DSO observations
  95. Fermi/GBM observation of the Soft Gamma Repeater SGR J1550-5418
  96. Trigger 558399: Swift detection of the Soft Gamma Repeater AXP 1E1547.0-5408
  97. Swift Trigger 557910 is not astrophysical
  98. GRB 130615A: Continued Skynet/PROMPT Observations
  99. GRB 130610A: TAROT La Silla observatory optical observations
  100. GRB 130610A: CrAO optical observations

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