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"

24519 results found.

  1. GRB 131127B: rejection of optical counterpart candidates
  2. GRB 131126A: Fermi GBM observation
  3. GRB 131126A: iPTF upper limits on the afterglow of a short GRB
  4. GRB 131127A: optically dark burst
  5. GRB 131202A, Swift-BAT refined analysis
  6. GRB 131202A: Fermi GBM Detection
  7. GRB 131128A; Fermi GBM observation
  8. GRB 131125A: MASTER-Net very early optical observations
  9. GRB 131125A: iPTF upper limits on the afterglow of a short GRB
  10. Konus-Wind observation of GRB 131126A
  11. IPN Triangulation of GRB 131126A (short/hard)
  12. Konus-Wind observation of GRB 131125A
  13. GRB 131128A: GROND observations of the afterglow
  14. IPN Triangulation of GRB 131125A (short/hard)
  15. GRB 131128A: Swift-BAT refined analysis
  16. GRB 131128A: MASTER-Net optical observations
  17. GRB 131127B: MASTER-Net optical observations
  18. Konus-Wind observation of GRB 131127B
  19. GRB 131127B: Fermi GBM detection
  20. Fermi407254341: iPTF optical afterglow candidates
  21. GRB 131127A: Swift-XRT refined Analysis
  22. GRB 131127A, Swift-BAT refined analysis
  23. GRB 131127A: MASTER-NET optical observations
  24. GRB 131127A: Swift detection of a burst
  25. GRB 131122A: Swift-XRT observations
  26. GRB 131122A: Nanshan optical upper limit
  27. GRB 131122A: a long GRB detected with INTEGRAL
  28. GRB 131122A (INTEGRAL trigger N6392): MASTER-NET optical observation
  29. GRB 131120A, Swift-BAT refined analysis
  30. Konus-Wind observation of GRB 131118A
  31. GRB 131120A: Swift detection of a burst
  32. GRB 131118A: Fermi GBM detection
  33. GRB 131108A: VLA Observations
  34. GRB 131030A, Optical Observations
  35. GRB 131117A, Swift-BAT refined analysis
  36. GRB 131117A: Swift-XRT refined Analysis
  37. GRB 131117A: GROND confirmation of the afterglow and photo-z.
  38. GRB 131117A: Skynet PROMPT optical detection of an afterglow
  39. GRB 131110A: Swift-XRT and UVOT upper limits
  40. GRB 131030A: MITSuME Akeno Optical observation
  41. Konus-Wind observation of GRB 131108A
  42. GRB 131108A: Fermi GBM observation
  43. GRB 131108A: Fermi-LAT refined analysis
  44. GRB 131108A: Fermi-LAT onboard detection of a burst
  45. GRB 131029A: Suzaku WAM observation of the prompt emission
  46. GRB 131105A, Swift-BAT refined analysis
  47. GRB 131103A: Swift-BAT refined analysis
  48. GRB 131030A: Swift-BAT refined analysis
  49. GRB 131105A: Fermi GBM observation
  50. GRB 131024B: Suzaku WAM observation of the prompt emission
  51. Konus-Wind observation of GRB 131105A
  52. GRB 131103A: VLT/X-shooter redshift
  53. GRB 131105A: VLT/X-shooter redshift
  54. GRB 131103A: NOT and VLT observations
  55. GRB 131103A: Swift-XRT refined Analysis
  56. GRB 131031A: Fermi GBM detection
  57. GRB 131031A: MASTER optical observation
  58. Konus-Wind observation of GRB 131031A
  59. GRB131030A : xinglong TNT optical observation
  60. GRB 131031A: Swift-XRT observations
  61. GRB 131031A: 1.23m CAHA I-band and 1.5m OSN R-band observations of Swift/BAT error circle
  62. GRB 131030A: T21 optical observations
  63. GRB 131030A: Swift-XRT refined Analysis
  64. GRB 131024C: ICSP discovery of a burst in X-rays by balloon borne study
  65. Konus-Wind observation of GRB 131030A
  66. GRB 131029A: Nanshan optical observations
  67. GRB 131030A: NOT redshift
  68. GRB 131030A - Liverpool Telescope Optical Afterglow Confirmation
  69. GRB 131030A: MASTER optical observation
  70. GRB 131029A: Fermi GBM observation
  71. GRB 131029A: Fermi-LAT detection of a burst
  72. Konus-Wind observation of GRB 131028A
  73. GRB 131028A: Fermi GBM detection
  74. Swift-BAT Trigger 575905 is probably not a real source
  75. GRB 131024B: MASTER prompt optical observation
  76. Swift Trigger 575905/ GRB 131026A: MITSuME Okayama and Ishigakijima Optical upper limits
  77. Swift Trigger 575905/possible GRB 131026A: Swift-XRT observations
  78. Swift Trigger 575905: ROTSE-III Optical Limits
  79. Swift Trigger 575905: KAIT Optical Upper Limit
  80. GRB 131024B, Swift-BAT refined analysis
  81. GRB 131024B: Fermi GBM observation
  82. GRB 131024B : Xinglong TNT upper limit
  83. GRB 131024B: Nanshan optical upper limit
  84. GRB 131024A, Swift-BAT refined analysis
  85. GRB 131024A: Skynet R-COP optical observations
  86. Konus-Wind observation of GRB 131011B
  87. IPN triangulation of GRB 131011B (Swift Trigger 574266)
  88. GRB 131018B: Swift-XRT observations
  89. GRB 131018B: Fermi GBM observation
  90. GRB 131018B: Fermi-LAT detection of a burst
  91. GRB 131018A: KAIT Optical Upper Limit
  92. GRB 131018A, Swift-BAT refined analysis
  93. GRB 131014A: XRT position information
  94. GRB 131014A: Suzaku WAM observation of the prompt emission
  95. GRB 131014A: RATIR Optical/NIR Afterglow Confirmation
  96. Konus-Wind observation of GRB 131014A
  97. GRB 131014A: NOT afterglow candidate
  98. GRB 131014A: Nanshan optical observations
  99. GRB 131014A: Fermi-LAT detection
  100. GRB 131014A: Fermi GBM detection

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