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"

38169 results found.

  1. GRB 080916: REM detection of the NIR afterglow
  2. GRB 080916: REM candidate afterglow
  3. GRB 080916: Swift detection of a burst with optical afterglow
  4. GRB 080915B, Swift-BAT refined analysis
  5. GRB 080912 : Fermi GBM detection
  6. GRB 080915B: Swift detection of a burst
  7. GRB 080915: REM NIR early observations
  8. GRB 080915: Swift/UVOT Upper Limits
  9. GRB 080915: Swift-XRT afterglow detection and analysis
  10. GRB 080915, Swift-BAT refined analysis
  11. GRB 080915: ROTSE-III Optical Limits
  12. GRB 080915: Swift detection of a burst
  13. GRB 080913: Swift-XRT refined analysis
  14. GRB 080913: VLT/FORS spectrum
  15. GRB080913: Swift/UVOT Upper Limits
  16. GRB 080913: GROND photo-z
  17. GRB 080913, Swift-BAT refined analysis
  18. GRB 080913: VLT/FORS2 observations
  19. GRB 080913: REM NIR early observations
  20. GRB 080913: Enhanced Swift-XRT position
  21. GRB 080913: GROND observation of a high-z optical/NIR afterglow candidate
  22. GRB 080913: Swift detection of a burst
  23. GRB 080906: Watcher observations
  24. Swift-BAT/-XRT refined analysis on trigger 324362 (LS I +61 303)
  25. GRB 080906B: Fermi GBM detection
  26. GRB 080905C: Fermi GBM detection
  27. GRB 080905B: Photometric Redshift for the 2MASS Galaxy
  28. GRB080905A: Swift/UVOT Upper Limits
  29. GRB 080905B: Watcher optical detection
  30. GRB 080904: Fermi Gamma-ray Burst Monitor detection
  31. GRB 080905B: Fermi Gamma-ray Burst Monitor detection
  32. GRB 080905A: Fermi Gamma-ray Burst Monitor detection
  33. GRB 080905A: Enhanced Swift-XRT position
  34. GRB 080905A: MITSuME Akeno optical upper limits
  35. Swift Trigger 324116 is known source again
  36. Swift Trigger 324112 is known source Swift J1842.5-1124
  37. GRB 080906: Refined Swift/UVOT Observations
  38. GRB 080906: Swift-XRT Refined Analysis
  39. GRB 080906, Swift-BAT refined analysis
  40. GRB 080905A: optical afterglow
  41. GRB 080906: GROND observations of the optical/NIR afterglow
  42. GRB 080905B: Swift-XRT Refined Analysis
  43. GRB 080905B: Refined UVOT Analysis
  44. GRB 080905B: VLT redshift
  45. GRB 080905A: NOT and VLT observations
  46. GRB 080905B: Enhanced Swift-XRT position
  47. GRB 080905B, Swift-BAT refined analysis
  48. GRB 080905A, Swift-BAT refined analysis
  49. GRB 080906: Swift detection of a burst with optical afterglow
  50. GRB 080905A: Swift-XRT Refined Analysis
  51. GRB 080825C: Fermi GBM Spectral Analysis
  52. GRB 080905B: Swift detection of a burst with possible optical counterpart
  53. GRB 080905: R & I-band optical observations
  54. GRB 080905: Swift detection of a probably-short burst
  55. GRB 080903: Swift/UVOT Observations
  56. GRB 080903: Swift-XRT Refined Analysis
  57. GRB 080903: Enhanced Swift-XRT position
  58. GRB 080903, Swift-BAT refined analysis
  59. GRB 080903: optical observations
  60. GRB 080903: Liverpool Telescope observations
  61. GRB 080903: Astrotel-Caucasus optical observations
  62. GRB 080903: Optical afterglow candidate
  63. GRB 080903: TAROT Calern observatory optical observations
  64. GRB 080903: ROTSE-III Optical Limits
  65. GRB 080903: Swift detection of a burst
  66. GRB 080830: Fermi Gamma-ray Burst Monitor detection
  67. GRB080828: Swift/UVOT Upper Limits
  68. GRB080825B: Swift/UVOT Upper Limits
  69. GRB 080828: Swift-XRT detection of a possible X-ray afterglow
  70. Swift-BAT trigger 322590 is not a GRB
  71. Swift trigger 322590: BAT detection of a possible burst
  72. GRB 080828: SuperAGILE GRB Localization
  73. GRB080823: Fermi Gamma-ray Burst Monitor detection
  74. GRB 080824: Fermi Gamma Ray Burst Monitor detection
  75. GRB 080825B: pseudo-z= 0.83 from prompt emission spectrum
  76. Konus-Wind observation of GRB 080825B
  77. GRB080825C: GLAST Burst Monitor detection
  78. GRB 080825B: Swift-XRT team analysis
  79. GRB080825: Afterglow confirmation and redshift estimate
  80. GRB 080825B - optical counterpart candidate
  81. GRB 080825B: GRB Localization by SuperAGILE
  82. GRB 080822B, Swift-BAT refined analysis
  83. GRB 080822B: MASTER optical observation
  84. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  85. Swift Trigger 321481: A Large Flare from SGR 0501+4516
  86. GRB 080822B: Swift detection of a burst
  87. GRB080818B: GLAST Burst Monitor detection
  88. GRB 080822 (SGR 0501+4516): archival optical observations
  89. New Soft Gamma Repeater 0501+4516 was GRB 080822
  90. GRB 080822: Swift detection of a short burst
  91. GLAST Burst Monitor detection of a GRB: 080816B
  92. GLAST Burst Monitor detection of GRB 080818
  93. GLAST Burst Monitor detection of GRB080817B
  94. GLAST Burst Monitor detection of GRB 080817
  95. GLAST Burst Monitor detection of GRB080816
  96. GRB080810 - optical observations
  97. GRB080810: optical observations
  98. GLAST Burst Monitor detection of GRB 080812
  99. Radio detection of GRB 080810 with the VLA
  100. GRB 080810: RTT150 optical observations

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