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"

41910 results found.

  1. GRB 140419A: Continued RATIR Optical and NIR Observations
  2. GRB140419A: NOT optical observations
  3. GRB 140419A: KAIT Refined Analysis
  4. GRB 140419A: Continued RATIR Optical and NIR Observations
  5. Swift Trigger 596641 is not a GRB
  6. Konus-Wind observation of GRB 140419A
  7. GRB 140419A, Optical Observations
  8. GRB 140419A: MITSuME Ishigakijima Optical Observation
  9. GRB 140419A: MITSuME Okayama Optical Observation
  10. GRB 140419A: Swift UVOT refined analysis
  11. GRB 140419A: P60 Observations
  12. GRB 140419A: Swift-XRT refined Analysis
  13. GRB 140419A: Swift-BAT refined analysis
  14. GRB 140419A: Gemini-N redshift
  15. GRB140419A: UVOT detects fading afterglow in white but not in u filter
  16. GRB 140419A: CARMA early 3mm detection
  17. GRB 140419A: RATIR Optical and NIR Observations
  18. GRB 140419A: ROTSE-III Detection of Optical Counterpart
  19. GRB 140419A (Swift trigger 596426) : KAIT optical candidate
  20. GRB 140419A: Swift detection of a burst with optical afterglow
  21. Konus-Wind observation of GRB 140416A
  22. IPN Triangulation of GRB 140416A (long/very intense)
  23. GRB 140416A: Fermi GBM detection
  24. GRB 140414A: Swift/UVOT Upper Limit
  25. GRB 140414A: Swift-XRT observations
  26. GRB 140414A: TNG optical observations
  27. GRB 140414A: Swift-BAT refined analysis
  28. GRB 140414A: Short burst found in ground analysis of BAT slew data
  29. GRB 140413A: Swift/UVOT Observations of the Optical Afterglow
  30. GRB 140412A: Swift/UVOT Upper Limits
  31. Konus-Wind observation of GRB 140413A
  32. GRB 140413A: Swift-XRT refined Analysis
  33. GRB 140413A: Swift-BAT refined analysis
  34. GRB 140412A: Swift-XRT refined Analysis
  35. GRB 140412A: Swift-BAT refined analysis
  36. GRB 140413A: TAROT La Silla observatory optical observations
  37. GRB 140413A: GROND afterglow candidate
  38. Swift Trigger 595616: a possible GRB
  39. GRB 140412A: Swift detection of a burst
  40. GRB 140408A: 1.5m OSN optical upper limit
  41. Swift Trigger 595345 is not an astrophysical source
  42. Swift-BAT trigger 595162 is noise
  43. GRB 140408A: MITSuME Akeno Optical observation
  44. Fermi418277210: iPTF optical observations
  45. GRB 140408A: RATIR Optical Upper Limits
  46. GRB 140408A: Swift-BAT refined analysis
  47. GRB 140408A: GROND Detection of an Afterglow Candidate
  48. GRB 140408A: Swift/UVOT Upper Limits
  49. GRB 140408A: Swift-XRT refined Analysis
  50. GRB 140408A: MITSuME Okayama upper limits
  51. GRB 140408A: Fermi GBM detection
  52. Swift Trigger 595162: a possible GRB
  53. GRB 140408A: Swift detection of a burst
  54. GRB 140406A: Fermi GBM observation
  55. GRB 140402A: Deep limit on the optical afterglow from Magellan observations
  56. GRB 111225A: Archeological redshift of the Christmas Burst 2011 from GTC
  57. GRB 140402A: Swift/UVOT Upper Limits
  58. GRB 140331A: Continued RATIR Optical and NIR Observations
  59. GRB 140402A: Swift-XRT observations
  60. GRB 140402A: MASTER optical observations
  61. GRB 140402A BAT refined analysis
  62. GRB 140402A : Xinglong TNT upper limit
  63. GRB 140402A: Marginal BAT detection
  64. GRB 140402A: Fermi GBM detection
  65. GRB 140402A: Fermi-LAT detection of a burst
  66. Swift trigger 594286: Is likely a noise trigger
  67. GRB 140219A: Correction to GCN 15885 (Suzaku-WAM fluence)
  68. GRB 140330A: Fermi GBM observation
  69. GRB 140331A: Swift-XRT refined Analysis
  70. GRB 140301A: Zadko observatory - Gingin optical observations
  71. GRB 140331A: Swift-BAT refined analysis
  72. Retraction of the Fermi/LAT high-energy counterpart for GRB 140330A
  73. GRB 140331A: Swift/UVOT Upper Limits
  74. GRB 140302A: TAROT La Silla observatory optical observations
  75. GRB 140323A: Zadko observatory - Gingin optical observations
  76. GRB 140330A: intense and persistent gamma-ray emission detected by AGILE
  77. GRB 140331A: Zadko observatory - Gingin optical observations
  78. Konus-Wind observation of GRB 140330A
  79. GRB 140129B: AAO optical upper limit
  80. GRB 140129A: Mondy optical observations
  81. GRB 140331A: MITSuME Okayama upper limits
  82. IPN triangulation of GRB 130330A
  83. GRB 140331A: RATIR Optical and NIR Observations
  84. GRB 140331A: Swift detection of a burst
  85. GRB 140330A: Fermi-LAT Detection
  86. GRB 140329A: Fermi-LAT detection
  87. Konus-Wind observation of GRB 140329A
  88. IPN Triangulation of GRB 140329A
  89. GRB 140320D: MASTER optical observations
  90. GRB 140329A: Fermi GBM observation of a bright burst
  91. GRB 140320D: Suzaku WAM observation of the prompt emission
  92. GRB 140323A : Suzaku WAM observation of the prompt emission
  93. Fermi Gamma-ray Burst Monitor trigger 417486540 / 140326020 is not a GRB
  94. GRB 140226A/iPTF14yb: Mondy optical observations
  95. GRB 140320C: Mondy optical observations and afterglow confirmation
  96. Konus-Wind observation of GRB 140323A
  97. GRB 140323A: Fermi-LAT detection
  98. GRB 140323A: Swift-XRT refined Analysis
  99. GRB 140323A: Fermi GBM observation
  100. GRB 140323A: BOOTES-3 optical upper limit.

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