Skip to main content
JSON Notices via Email, Kafka Cron Jobs, Submitter Profile, GCN is Hiring. 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"

19605 results found.

  1. GRB 130816A: GROND confirmation of afterglow
  2. GRB 130816A: Enhanced Swift-XRT position
  3. GRB 130816B: Swift detection of a burst
  4. GRB 130816A: Swift detection of a burst
  5. Refined IPN Triangulation of GRB 130812B
  6. IPN Triangulation of GRB 130812B (long/soft)
  7. GRB 130812A: Swift/UVOT Upper Limits
  8. GRB 130812A, Swift-BAT refined analysis
  9. GRB 130812A: GROND upper limits
  10. GRB 130812A: Swift-XRT refined Analysis
  11. GRB 130812A: Enhanced Swift-XRT position
  12. GRB 130812A: Swift detection of a burst
  13. Correction to GCN Circ. 15086 "GRB130807A: Swift/UVOT observations"
  14. GRB130807A: Swift/UVOT observations
  15. GRB 130807A: Swift-XRT refined analysis
  16. GRB 130806A: Swift/UVOT Upper Limits
  17. GRB 130807A, Swift-BAT refined analysis
  18. GRB 130807A: Swift detection of a GRB or Galactic transient
  19. GRB 130623A: GROND detection of the optical/NIR afterglow
  20. GRB 130806A: Swift-XRT refined Analysis
  21. GRB 130806A, Swift-BAT refined analysis
  22. IPN localization of GRB 130804A
  23. SGR 1745-29 (Swift trigger 565443), Swift-BAT refined analysis
  24. GRB130803A: GROND observations
  25. GRB 130806A: Enhanced Swift-XRT position
  26. GRB 130806A: Swift detection of a burst
  27. Trigger 565443: Swift detection of a burst from SGR J1745-29
  28. GRB 130803A: Swift-XRT refined Analysis
  29. GRB 130803A: RATIR Optical and NIR Observations
  30. GRB130803A: GROND detection of possible host
  31. GRB 130803A: Swift/UVOT Upper Limits
  32. GRB 130803A; Fermi GBM observation
  33. GRB 130803A, Swift-BAT refined analysis
  34. GRB 130803A: Enhanced Swift-XRT position
  35. GRB 130803A: Faulkes Telescope South Observations
  36. GRB 130803A: Swift detection of a burst
  37. GRB 130727A: Watcher optical limit
  38. GRB 130727A: Swift/UVOT Detection
  39. Konus-Wind observation of GRB 130727A
  40. GRB 130727A: Swift-XRT refined Analysis
  41. GRB 130727A: Fermi GBM detection
  42. GRB 130727A: GROND observations
  43. GRB 130727A: Enhanced Swift-XRT position
  44. GRB 130727A: Swift-BAT refined analysis
  45. GRB 130727A: Swift-XRT observations
  46. GRB 130727A: Swift-XRT and Swift-UVOT prompt observations
  47. GRB 130727A: Swift detection of a burst
  48. GRB 130725B: Swift/UVOT Observations
  49. GRB 130725B: Swift trigger time correction
  50. GRB 130725A: Swift-XRT refined Analysis
  51. GRB 130725B, Swift-BAT refined analysis
  52. GRB 130725B: Swift-XRT refined Analysis
  53. GRB 130725B - UVOT-enhanced XRT position
  54. GRB 130725A: Swift/UVOT Upper Limits
  55. GRB 130725A - Faulkes Telescope South Observations
  56. GRB 130725B: GROND Detection of the Optical/NIR Afterglow
  57. GRB 130725B: Swift/UVOT Detection of an Optical Counterpart
  58. GRB 130725A, Swift-BAT refined analysis
  59. GRB 130719A: Skynet/PROMPT observations
  60. GRB 130725B: Swift detection of a burst
  61. Swift Trigger 563980 is GRB 130725A
  62. Swift Trigger 563980 cannot be identified at this time.
  63. Retraction of GCN Circ. 15020 (GRB 130722C Tiled Swift observations)
  64. Konus-Wind observation of GRB 130722A
  65. GRB 130722A: Swift/UVOT Detection
  66. GRB 130722C Tiled Swift observations
  67. GRB 130722A: Enhanced Swift-XRT position
  68. GRB 130722A: Swift-XRT refined Analysis
  69. GRB 130722A: Skynet/GORT observations
  70. GRB 130719A, Swift-BAT refined analysis
  71. GRB 130715A: Suzaku WAM observation of the prompt emission
  72. GRB 130722A: Swift detection of a burst
  73. GRB 130719A: Swift detection of a burst
  74. GRB 130716A: Fermi GBM observation
  75. GRB 130716A Swift-BAT Spectral lag analysis
  76. GRB 130716A: UVOT Upper Limits
  77. GRB 130716A: Probable short-hard burst with delayed Swift data
  78. GRB 130626A: Retraction of possible X-ray afterglow
  79. GRB 130708A: Swift XRT and UVOT Observations
  80. GRB 130708A: Fermi GBM observation
  81. GRB 130708A found in ground analysis of Swift-BAT data
  82. GRB 130628A: Suzaku WAM observation of the prompt emission
  83. GRB 130702A: Continued UVOT Observations
  84. GRB 130702A: further Swift-XRT observations
  85. Fermi GRB 130702A: Swift XRT and UVOT observations
  86. Fermi394416326: iPTF detection of a possible optical afterglow
  87. GRB 130627B: Swift afterglow confirmation
  88. GRB 130623A: Second Swift-XRT observation
  89. GRB 130701A: Swift-XRT refined Analysis
  90. GRB 130701A: P60 Observations
  91. GRB 130701A, Swift-BAT refined analysis
  92. Konus-Wind observation of GRB 130701A
  93. GRB 130701A: Swift/UVOT Detection
  94. GRB 130701A: Enhanced Swift-XRT position
  95. GRB 130701A: Swift detection of a burst
  96. GRB 130627B, Swift-BAT refined analysis
  97. GRB 130627A, Swift-BAT refined analysis
  98. GRB 130627B: Swift/UVOT Upper Limits
  99. GRB 130627A: Swift/UVOT Upper Limits
  100. GRB 130627A: Swift-XRT refined Analysis

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