Skip to main content
New! BOOM Notices and Schema v7.0.0. See news and announcements

GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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"

502 results found.

  1. GRB030929/SN2003jd association unlikely based on IPN localiztion
  2. IPN triangulation of GRB031027 (small error box)
  3. IPN triangulation of GRB031026B (large error box)
  4. IPN triangulation of GRB031024 (single error box)
  5. IPN triangulation of GRB031024 (annulus)
  6. IPN triangulation of GRB031020 (large error box)
  7. IPN triangulation of GRB031004B (annulus)
  8. IPN triangulation of GRB031004A (short/hard; annulus)
  9. IPN triangulation of GRB030926 (short/hard; large error box)
  10. IPN triangulation of GRB030922B (large error box)
  11. IPN triangulation of GRB030921 (large error box)
  12. IPN triangulation of GRB030919 (large error box)
  13. IPN triangulation of GRB030916 (possible short/hard GRB; large error box)
  14. IPN triangulation of GRB030908 (annulus)
  15. IPN triangulation of GRB030903 (large error box)
  16. IPN triangulation of GRB030831 (annulus)
  17. IPN triangulation of GRB030827 (large error box)
  18. IPN triangulation of GRB030821 (=H2814; refined error box)
  19. GRB 030821(=H2814): A Faint, Long GRB Localized by the HETE WXM and the IPN
  20. Summary of recent IPN and HETE detections of SGR bursts
  21. IPN triangulation of GRB030814 (annulus)
  22. IPN detection of continued activity from SGR1806-20
  23. SGR 1808-20 (=H2802): A Possible new SGR
  24. IPN triangulation of GRB030806 (large burst; large error box)
  25. IPN triangulation of GRB030801 (large error box)
  26. IPN triangulation of GRB030725 (=H2779; small error box)
  27. IPN triangulation of GRB030726 (large error box)
  28. IPN triangulation of GRB030721 (large error box)
  29. IPN triangulation of GRB030714 (two large error boxes)
  30. IPN triangulation of GRB030715 (two large error boxes)
  31. IPN triangulation of GRB030711 (annulus, =SGR0525-66?)
  32. IPN triangulation of GRB030626 (single large error box)
  33. IPN triangulation of GRB030626 (two large error boxes)
  34. Final IPN error ellipse for GRB021206 (the polarized GRB)
  35. IPN triangulation of GRB030606 (two alternate error boxes)
  36. IPN triangulation of GRB030509 (small errror box)
  37. IPN triangulation of GRB030425 (single error box)
  38. IPN triangulation of GRB030422 (two large error boxes)
  39. IPN triangulation of GRB030414 (small error box)
  40. IPN triangulation of GRB030413 (small error box)
  41. IPN triangulation of GRB030406 (small error box)
  42. IPN triangulation of GRB050403 (small error box)
  43. IPN triangulation of GRB030325 (final analysis)
  44. IPN triangulation of GRB030326 (single small error box)
  45. IPN triangulation of GRB030325 (single small error box)
  46. IPN triangulation of GRB030325 (two small error boxes)
  47. IPN triangulation of GRB030320 (small error box)
  48. IPN triangulation of GRB030320
  49. IPN upper limit to a GRB associated with SN2003L
  50. IPN triangulation of GRB030306 (single small error box - REVISED)
  51. IPN triangulation of GRB030306 (single small error box)
  52. IPN triangulation of GRB030306 (two small error boxes)
  53. IPN triangulation of GRB030306 (intense; annulus only so far)
  54. IPN triangulation of GRB030217 (small error box)
  55. IPN triangulation of GRB030204 (small error box)
  56. IPN triangulation of GRB030115C (large error box)
  57. IPN triangulation of GRB030115B (small error box)
  58. IPN triangulation of GRB030105 (large error box)
  59. GRB021226
  60. IPN triangulation of GRB021206 (small error box)
  61. IPN triangulation of GRB021206 (exceptionally bright; annulus only)
  62. IPN triangulation of GRB021205 (large error box)
  63. IPN triangulation of GRB021201 (short/hard burst, small error box)
  64. Improved IPN error box for GRB021125
  65. IPN triangulation of GRB021125 (INTEGRAL BURST)
  66. IPN triangulation of bursts from SGR1900+14, November 1-2, 2002
  67. IPN triangulation of GRB021027 (single large error box)
  68. IPN triangulation of GRB021023 (small error boc)
  69. IPN triangulation of GRB021020 (smaller error box)
  70. IPN triangulation of GRB021020
  71. IPN triangulation of GRB021013 (single error box)
  72. IPN triangulation of GRB021013 (two small error boxes)
  73. IPN triangulation of GRB021013 (annulus)
  74. IPN triangulation of GRB021008 (single error box)
  75. IPN triangulation of GRB021008 (two small error boxes)
  76. IPN triangulation of GRB020923 (two error boxes)
  77. IPN annulus for GRB020923
  78. Confirmation of IPN error box for GRB020910
  79. IPN triangulation of GRB020910
  80. Single IPN error box for GRB020904
  81. IPN triangulation of GRB020904
  82. IPN error box for GRB020813
  83. IPN triangulation of GRB020813
  84. Further refinement to IPN error box for GRB020531
  85. IPN triangulation of GRB020715 (=GRB150702)
  86. IPN triangulation of GRB020714
  87. IPN triangulation of GRB150702
  88. IPN triangulation of GRB020708
  89. IPN triangulation of GRB020706
  90. IPN triangulation of GRB020604
  91. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  92. IPN triangulation of GRB020603 (possible short/hard GRB)
  93. Refined IPN error box for GRB020531
  94. IPN triangulation of the short, hard GRB020531 (=H2042)
  95. IPN triangulation of GRB020525
  96. IPN triangulation of GRB020418
  97. Mars Odyssey joins the IPN
  98. IPN triangulation of GRB020413
  99. IPN localization of GRB020405
  100. IPN Upper Limits to a GRB Associated With SN2002ap

Advanced

Download all Circulars as a .tar.gz archive:
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