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"

43681 results found.

  1. GRB 140209A, Swift-BAT refined analysis
  2. GRB 140209A: Fermi GBM observation
  3. GRB 140209A: optical observations
  4. GRB 140209A: P60 optical afterglow detection
  5. GRB 140209A: Swift detection of a burst
  6. GRB 140206A: Mondy optical observations
  7. GRB 140206A: Liverpool Telescope optical afterglow observations
  8. GRB 140206A, Swift-BAT refined analysis
  9. Konus-Wind observation of GRB 140206B
  10. GRB 140206A: MITSuME Akeno detection of the optical counterpart
  11. GRB 140206A: TNG redshift confirmation
  12. GRB 140206A: Optical Observations via Virtual Telescope
  13. GRB 140206A: NOT redshift
  14. GRB 140206A: TNG optical observations
  15. GRB 140206A: Swift-XRT refined Analysis
  16. GRB 140206A: T100 observations
  17. GRB 140206A: Fermi GBM detection
  18. GRB 140206A: Swift/UVOT Detection
  19. GRB 140206A: theoretical prediction of redshift and of supernova occurrence
  20. GRB 140206A: Enhanced Swift-XRT position
  21. GRB 140206A: ISON-Ussuriysk optical observations
  22. GRB 140206B: Fermi-LAT detection
  23. GRB 140206B: Fermi GBM detection
  24. GRB 140206A: Nanshan optical observations
  25. GRB 140206A: MASTER OT detection
  26. GRB 140206A: Swift/UVOT optical detection
  27. GRB140206A - Optical afterglow candidate
  28. GRB140206A: a long GRB detected by INTEGRAL
  29. GRB 140206A: Swift detection of a burst
  30. GRB 140129A: 5 GHz VLA observations
  31. GRB 140129A: Continued RATIR Optical and NIR Observations
  32. GRB 140129A: Khureltogot optical limit
  33. GRB 140129B: Swift/UVOT Detection
  34. GRB 140129A: Continued RATIR Optical and NIR Observations
  35. GRB 140129B: Swift-XRT refined Analysis
  36. GRB 140129B: MASTER OT early light curve
  37. GRB 140129A: CARMA early observations
  38. GRB 140129B, Swift-BAT refined analysis (probably not a short burst)
  39. GRB 140129A: P200 spectroscopy
  40. GRB 140129B: Enhanced Swift-XRT position
  41. GRB 140129A, Swift-BAT refined analysis
  42. GRB 140129A: Swift/UVOT Observations
  43. GRB 140129A: Swift-XRT refined Analysis
  44. GRB 140129B: MASTER OT confirmation
  45. GRB 140129B: Swift detection of a burst with an optical afterglow
  46. GRB 140129A: Enhanced Swift-XRT position
  47. GRB 140129A: ROTSE-III Detection of Optical Counterpart
  48. GRB 140129A: RATIR Optical and NIR Observations
  49. GRB 140129A: P60 optical afterglow detection
  50. GRB 140129A: Swift detection of a burst with an optical afterglow
  51. GRB 140122A/Fermi412093190: MASTER-Net early optical observations
  52. Fermi412093190: iPTF optical counterpart search
  53. GRB 140110A: Second Follow-up Swift-XRT Observation
  54. GRB 140114A: optical upper limit
  55. Correction: MAXI J1421-613: Skynet PROMPT/R-COP observations
  56. Konus-Wind observation of GRB 131215A
  57. GRB 140118A/MAXI J1421-613: Skynet PROMPT/R-COP observations
  58. GRB 140118A: RATIR Optical and NIR Observations
  59. GRB 140118A: Fermi GBM observation
  60. GRB 140118A, Swift-BAT refined analysis
  61. Swift Trigger 584155 is MAXI J1421-613
  62. GRB 140118A: Swift detection of a burst
  63. GRB 140110A: Further Swift-XRT Observation
  64. GRB 140103A: MASTER-Net early OT detection
  65. GRB 140103A: optical upper limit
  66. GRB 140108A: Mondy optical observations, refined analysis
  67. GRB 140114A: NOT afterglow observations
  68. GRB 140114A: Continued RATIR Optical and NIR Observations
  69. GRB 140114A: ROTSE-III Optical Limits
  70. GRB 140114A: Swift-XRT refined Analysis
  71. GRB 140114A: Swift-BAT refined analysis
  72. GRB 140114A: KAIT Optical Upper Limit
  73. GRB 140103A: AAO optical afterglow candidate
  74. GRB 140104B: Further Swift XRT observations
  75. GRB 140114A: Enhanced Swift-XRT position
  76. GRB 140114A: RATIR Optical and NIR Afterglow Detection
  77. Fermi Gamma-ray Burst Monitor trigger 411362827 is not a GRB
  78. GRB 140102A: AAO optical upper limits
  79. GRB 140114A: P60 Observations
  80. GRB 140114A: Swift detection of a burst
  81. GRB 140108A: Konkoly optical observations
  82. GRB 140110A: Swift/UVOT retraction of UVOT candidates
  83. IPN Triangulation of GRB 140110A
  84. GRB 140110A: Swift/UVOT Observations
  85. GRB 140108A: Suzaku WAM observation of the prompt emission
  86. GRB 140104B: Suzaku WAM observation of the prompt emission
  87. GRB 140110A: Swift XRT observations
  88. GRB 140110A: Reported UVOT OT not GRB afterglow
  89. GRB 140110A: OT detection in Swift/UVOT imaging
  90. GRB 140108A BAT refined analysis update *CORRECTION*
  91. GRB 140108A BAT refined analysis update
  92. GRB 140110A: Fermi GBM observation
  93. GRB 140110A Tiled Swift observations
  94. GRB 140110A: Fermi-LAT detection of a burst
  95. GRB 140108A: Mondy optical upper limit
  96. GRB 140105A: MASTER-Net early optical observations and time correction
  97. GRB 131231A: AAO optical observations
  98. GRB 140108A: Swift-BAT refined analysis
  99. GRB 140108A: Fermi GBM detection
  100. GRB 140108A: Swift/UVOT 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