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"

37572 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. Swift trigger 324362 (LS I +61 303 ?)
  29. GRB080905A: Swift/UVOT Upper Limits
  30. GRB 080905B: Watcher optical detection
  31. GRB 080904: Fermi Gamma-ray Burst Monitor detection
  32. GRB 080905B: Fermi Gamma-ray Burst Monitor detection
  33. GRB 080905A: Fermi Gamma-ray Burst Monitor detection
  34. GRB 080905A: Enhanced Swift-XRT position
  35. GRB 080905A: MITSuME Akeno optical upper limits
  36. Swift Trigger 324116 is known source again
  37. Swift Trigger 324112 is known source Swift J1842.5-1124
  38. GRB 080906: Refined Swift/UVOT Observations
  39. GRB 080906: Swift-XRT Refined Analysis
  40. GRB 080906, Swift-BAT refined analysis
  41. GRB 080905A: optical afterglow
  42. GRB 080906: GROND observations of the optical/NIR afterglow
  43. GRB 080905B: Swift-XRT Refined Analysis
  44. GRB 080905B: Refined UVOT Analysis
  45. GRB 080905B: VLT redshift
  46. GRB 080905A: NOT and VLT observations
  47. GRB 080905B: Enhanced Swift-XRT position
  48. GRB 080905B, Swift-BAT refined analysis
  49. GRB 080905A, Swift-BAT refined analysis
  50. GRB 080906: Swift detection of a burst with optical afterglow
  51. GRB 080905A: Swift-XRT Refined Analysis
  52. GRB 080825C: Fermi GBM Spectral Analysis
  53. GRB080825C: Fermi-LAT observations
  54. GRB 080905B: Swift detection of a burst with possible optical counterpart
  55. GRB 080905: R & I-band optical observations
  56. GRB 080905: Swift detection of a probably-short burst
  57. GRB 080903: Swift/UVOT Observations
  58. GRB 080903: Swift-XRT Refined Analysis
  59. GRB 080903: Enhanced Swift-XRT position
  60. GRB 080903, Swift-BAT refined analysis
  61. GRB 080903: optical observations
  62. GRB 080903: Liverpool Telescope observations
  63. GRB 080903: Astrotel-Caucasus optical observations
  64. GRB 080903: Optical afterglow candidate
  65. GRB 080903: TAROT Calern observatory optical observations
  66. GRB 080903: ROTSE-III Optical Limits
  67. GRB 080903: Swift detection of a burst
  68. GRB 080830: Fermi Gamma-ray Burst Monitor detection
  69. GRB080828: Swift/UVOT Upper Limits
  70. GRB080825B: Swift/UVOT Upper Limits
  71. GRB 080828: Swift-XRT detection of a possible X-ray afterglow
  72. Swift-BAT trigger 322590 is not a GRB
  73. Swift trigger 322590: BAT detection of a possible burst
  74. GRB 080828: SuperAGILE GRB Localization
  75. GRB080823: Fermi Gamma-ray Burst Monitor detection
  76. GRB 080824: Fermi Gamma Ray Burst Monitor detection
  77. GRB 080825B: pseudo-z= 0.83 from prompt emission spectrum
  78. Konus-Wind observation of GRB 080825B
  79. GRB080825C: GLAST Burst Monitor detection
  80. GRB 080825B: Swift-XRT team analysis
  81. SGR 0501+4516: Fermi GBM (formerly GLAST Burst Monitor) observations of three exceptionally intense outbursts
  82. GRB080825: Afterglow confirmation and redshift estimate
  83. GRB 080825B - optical counterpart candidate
  84. GRB 080825B: GRB Localization by SuperAGILE
  85. GRB 080822B, Swift-BAT refined analysis
  86. GRB 080822B: MASTER optical observation
  87. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  88. Swift Trigger 321481: A Large Flare from SGR 0501+4516
  89. GRB 080822B: Swift detection of a burst
  90. GRB080818B: GLAST Burst Monitor detection
  91. GRB 080822 (SGR 0501+4516): archival optical observations
  92. New Soft Gamma Repeater 0501+4516 was GRB 080822
  93. GRB 080822: Swift detection of a short burst
  94. GLAST Burst Monitor detection of a GRB: 080816B
  95. GLAST Burst Monitor detection of GRB 080818
  96. GLAST Burst Monitor detection of GRB080817B
  97. GLAST Burst Monitor detection of GRB 080817
  98. GLAST Burst Monitor detection of GRB080816
  99. GRB080810 - optical observations
  100. GRB080810: 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