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"

45505 results found.

  1. GRB 130812A: Swift/UVOT Upper Limits
  2. GRB 130812A, Swift-BAT refined analysis
  3. GRB 130812A: GROND upper limits
  4. GRB 130812A: Swift-XRT refined Analysis
  5. GRB 130812A: Enhanced Swift-XRT position
  6. GRB 130812A: Swift detection of a burst
  7. Correction to GCN Circ. 15086 "GRB130807A: Swift/UVOT observations"
  8. GRB130807A: Swift/UVOT observations
  9. GRB 130807A: Swift-XRT refined analysis
  10. GRB 130806A: Swift/UVOT Upper Limits
  11. GRB 130807A, Swift-BAT refined analysis
  12. GRB 130807A: Swift detection of a GRB or Galactic transient
  13. Konus-Wind observation of GRB 130804A
  14. GRB 130623A: GROND detection of the optical/NIR afterglow
  15. GRB 130806A: MITSuME Akeno Optical observation
  16. GRB 130806A: Swift-XRT refined Analysis
  17. GRB 130806A: MITSuME Okayama upper limits
  18. GRB 130806A, Swift-BAT refined analysis
  19. IPN localization of GRB 130804A
  20. SGR 1745-29 (Swift trigger 565443), Swift-BAT refined analysis
  21. GRB130803A: GROND observations
  22. GRB 130806A: Enhanced Swift-XRT position
  23. GRB 130806A: Swift detection of a burst
  24. GRB 130804A; Fermi GBM observation
  25. Trigger 565443: Swift detection of a burst from SGR J1745-29
  26. GRB 130803A: Swift-XRT refined Analysis
  27. GRB 130803A: RATIR Optical and NIR Observations
  28. GRB130803A: GROND detection of possible host
  29. GRB 130803A: Swift/UVOT Upper Limits
  30. GRB 130803A; Fermi GBM observation
  31. GRB 130803A, Swift-BAT refined analysis
  32. GRB 130803A: Enhanced Swift-XRT position
  33. GRB 130803A: Faulkes Telescope South Observations
  34. GRB 130603B: Second epoch of HST WFC/F160W imaging
  35. GRB 130803A: Swift detection of a burst
  36. GRB 130727A: Watcher optical limit
  37. GRB 130722A: RATIR Optical Observations
  38. GRB 130727A: Swift/UVOT Detection
  39. Konus-Wind observation of GRB 130727A
  40. GRB 130727A: Swift-XRT refined Analysis
  41. GRB 130727A: Fermi GBM detection
  42. GRB 130727A: GROND observations
  43. GRB 130727A: Enhanced Swift-XRT position
  44. GRB 130727A: Faulkes Telescope South optical afterglow
  45. GRB 130727A: Swift-BAT refined analysis
  46. GRB 130727A: Swift-XRT observations
  47. GRB 130727A: Swift-XRT and Swift-UVOT prompt observations
  48. GRB 130727A: Swift detection of a burst
  49. GRB 130725B: Swift/UVOT Observations
  50. GRB 130725B: Swift trigger time correction
  51. Fermi Gamma-ray Burst Monitor trigger 396484884 / 130725945 is not a GRB
  52. GRB 130725A: Swift-XRT refined Analysis
  53. GRB 130725B, Swift-BAT refined analysis
  54. GRB 130725B: Swift-XRT refined Analysis
  55. GRB130725B: REM-ROS2 optical observations
  56. GRB 130725B - UVOT-enhanced XRT position
  57. Fermi Gamma-ray Burst Monitor trigger 396533554 / 130726509 is not a GRB
  58. GRB 130725A: Swift/UVOT Upper Limits
  59. GRB 130725B: GROND Detection of the Optical/NIR Afterglow
  60. GRB 130725A: MITSuME Ishigakijima Optical Observation
  61. GRB 130725B: Swift/UVOT Detection of an Optical Counterpart
  62. GRB 130725A, Swift-BAT refined analysis
  63. GRB 130719A: Skynet/PROMPT observations
  64. GRB 130725B: Swift detection of a burst
  65. Swift Trigger 563980 is GRB 130725A
  66. Fermi Gamma-ray Burst Monitor trigger 396447899 / 130725517 is not a GRB
  67. Swift Trigger 563980 cannot be identified at this time.
  68. GRB 130702A in the Ep,i - Eiso plane
  69. Retraction of GCN Circ. 15020 (GRB 130722C Tiled Swift observations)
  70. Konus-Wind observation of GRB 130722A
  71. GRB 130722A: Swift/UVOT Detection
  72. GRB 130722A: MITSuME Okayama upper limits
  73. GRB 130722C Tiled Swift observations
  74. GRB 130722A: Enhanced Swift-XRT position
  75. GRB 130722A: Swift-XRT refined Analysis
  76. GRB 130722A: Skynet/GORT observations
  77. GRB 130719A, Swift-BAT refined analysis
  78. GRB 130722A: Faulkes Telescope South optical candidate
  79. GRB 130715A: Suzaku WAM observation of the prompt emission
  80. GRB 130722A: Swift detection of a burst
  81. GRB 130719A: Swift detection of a burst
  82. GRB 130716A: Fermi GBM observation
  83. GRB 130702A : Xinglong TNT continue optical observation
  84. GRB 130716A: Gemini-North imaging
  85. GRB 130716A: UVOT Upper Limits
  86. GRB 130716A: Probable short-hard burst with delayed Swift data
  87. GRB 130715A: Fermi GBM detection
  88. GRB 130626A: Retraction of possible X-ray afterglow
  89. GRB 130702A: Maidanak optical observations
  90. GMRT radio detection of GRB 130702A
  91. GRB 130708A: Swift XRT and UVOT Observations
  92. GRB 130702A: TNG spectroscopic observations of the emerging supernova
  93. GRB 130708A: Fermi GBM observation
  94. GRB 130702A: P200 Spectroscopic Confirmation of Associated Supernova
  95. GRB 130708A found in ground analysis of Swift-BAT data
  96. GRB 130702A: Maidanak optical observations
  97. GRB 130628A: Suzaku WAM observation of the prompt emission
  98. GRB130702A: NOT observation - the detection of an emerging supernova
  99. GRB 130702A: Continued RATIR Optical and NIR Observations
  100. GRB 130702A: Xinglong TNT optical observation

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