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 140318A: Swift-BAT refined analysis
  2. GRB 140318A: Liverpool Telescope optical observations
  3. GRB140318A: Discovery Channel Telescope Optical Detection
  4. GRB 140318A: Swift detection of a burst
  5. GRB140308A: Suzaku WAM observation of the prompt emission
  6. GRB 140311C: MASTER before, during and after trigger optical observations
  7. GRB 140311B: Swift-BAT refined analysis
  8. GRB 140311C: Fermi GBM Detection
  9. GRB 140311B: Fermi GBM Detection
  10. GRO J1744-28: Fermi GBM observation
  11. GRB 140311A: Swift-BAT refined analysis
  12. GRB 140311B: final MASTER OT light curve
  13. GRB 140311B: MASTER early optical observations
  14. GRB 140311A: MASTER early optical observations
  15. GRB 140311B: Swift detection of a burst
  16. GRB 140311A: Swift detection of a probable burst
  17. Konus-Wind observation of GRB 140308A
  18. GRB 140304A: Suzaku WAM observation of the prompt emission
  19. GRB 140306A: Suzaku WAM observation of the prompt emission
  20. Konus-Wind observation of GRB 140306A
  21. GRB 140306A: Fermi GBM detection
  22. GRB 140305A: Swift-BAT refined analysis
  23. Trigger 590503: Swift-BAT triggered on noise
  24. GRB 140304A: MASTER OT light curve
  25. GRB 140304A: CARMA 3mm detection
  26. GRB 140305A: Swift detection of a burst
  27. GRB 140304A: Swift-BAT refined analysis
  28. GRB 140304A: Swift-XRT refined Analysis
  29. GRB 140304A: Fermi GBM detection
  30. GRB 140304A: Swift detection of a burst
  31. GRB 140304A: MASTER OT detecton
  32. GRB 140302A: MITSuME Okayama upper limits
  33. GRB140302A: Fermi GBM detection
  34. GRB 140302A: Swift-BAT refined analysis
  35. GRB 140301A: Swift-BAT refined analysis
  36. GRB 140301A: Swift-XRT refined Analysis
  37. GRB 140302A: GROND afterglow candidate
  38. GRB 140302A: Swift detection of a burst
  39. GRB 140301A: VLT/X-shooter redshift
  40. GRB 140301A: Skynet R-COP Observations
  41. GRB 140226A/iPTF14yb: RATIR Optical and NIR Observations
  42. Konus-Wind observation of GRB 140226A
  43. IPN triangulation of GRB 140226A, a possible GRB counterpart to iPTF14yb
  44. iPTF14yb: RATIR Optical and NIR Observations of the optical transient
  45. GRB 140219A: Suzaku WAM observation of the prompt emission
  46. iPTF14yb: Swift-XRT detection
  47. GRB 140219A: MAXI/GSC detection
  48. GRB 140219A: the confirmation of the brightening SDSS J102406.41+062937.6 star
  49. GRB 140219A: MASTER optical brightening inside XRT-5 error box detection
  50. GRB 140219A: iPTF optical observations
  51. GRB 140102A: TAOS early optical afterglow detection
  52. GRB 140219A: XRT afterglow candidate
  53. GRB 140221A: Results from Swift XRT tiled observations
  54. GRB 140219A: results from Swift XRT and UVOT tiled observations
  55. GRB 140219A: MASTER before and after GRB observational arguments of the exceptionally Dark GRB
  56. Konus-Wind observation of exceptionally bright GRB 140219A
  57. GRB 140219A: Fermi GBM Detection
  58. GRB 140213A: Continued Skynet R-COP/PROMPT Observations of the Optical Afterglow
  59. GRB 140215A: RAPTOR Observations During Gamma-Ray Emitting Interval
  60. GRB 140213A: Continued Skynet R-COP/PROMPT Detections of a Rebrightening Optical Afterglow
  61. GRB 140215A: Continued Skynet PROMPT Observations of the Optical Afterglow
  62. Konus-Wind observation of GRB 140213A
  63. Konus-Wind observation of GRB 140215A
  64. GRB 140211A: Swift-XRT and UVOT observations
  65. GRB140215A: Continued Discovery Channel Telescope Observations
  66. GRB 140215A: MITSuME Okayama Optical Observation
  67. GRB 140215A: Swift-BAT refined analysis
  68. GRB 140215A: P60 observations
  69. GRB 140215A: T24 optical observations
  70. GRB140215A: Skynet PROMPT Optical Observations
  71. GRB 140215A: KAIT Optical Detection
  72. GRB140215A: Prompt Observations with Discovery Channel Telescope
  73. GRB 140213A: Swift-BAT refined analysis
  74. GRB 140213A: Fermi GBM Detection
  75. GRB 140213A: Skynet R-COP Detection of Optical Afterglow
  76. GRB 140213A: Swift detection of a burst
  77. GRB140211A : Xinglong TNT upper limit
  78. GRB 140211A: Swift-BAT refined analysis
  79. GRB 140209A: Swift-XRT observations
  80. Konus-Wind observation of GRB 140209A
  81. GRB 140211A: MITSuME Okayama upper limits
  82. GRB 140211A: Swift detection of a burst
  83. GRB 140209A: Early RAPTOR Optical Detection
  84. GRB 140209A, Swift-BAT refined analysis
  85. GRB 140209A: Fermi GBM observation
  86. GRB 140209A: optical observations
  87. GRB 140209A: Swift detection of a burst
  88. GRB 140206A: Liverpool Telescope optical afterglow observations
  89. GRB 140206A, Swift-BAT refined analysis
  90. Konus-Wind observation of GRB 140206B
  91. GRB 140206A: NOT redshift
  92. GRB 140206A: Swift-XRT refined Analysis
  93. GRB 140206A: Fermi GBM detection
  94. GRB 140206B: Fermi-LAT detection
  95. GRB 140206B: Fermi GBM detection
  96. GRB 140206A: MASTER OT detection
  97. GRB140206A: a long GRB detected by INTEGRAL
  98. GRB 140206A: Swift detection of a burst
  99. GRB 140102A: MITSuME Akeno Optical observation
  100. GRB 140129B: MASTER OT early light curve

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