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"

36349 results found.

  1. GRB 120701A: Swift/UVOT Detection
  2. GRB 120701A: GROND detection of the afterglow
  3. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  4. GRB 120701A: Swift-XRT afterglow detection and analysis
  5. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  6. GRB 120701A: Swift-BAT refined analysis
  7. GRB 120630A: NOT optical source within the XRT error circle
  8. Swift Trigger 525554 is probably not a GRB
  9. GRB120624B: Chandra observations and afterglow detection
  10. Fermi Gamma-ray Burst Monitor trigger 120628.973 is not a GRB
  11. GRB 120624B Further Swift-XRT analysis
  12. GRB 120624B: Swift/UVOT Upper Limits
  13. GRB 120624B: Further analysis of the HAWKI observations
  14. GRB 120624B: Swift-XRT observations
  15. GRB 120624B: GROND upper limits
  16. GRB 120624B: NIR counterpart candidate from HAWKI
  17. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  18. GRB 120624B: NOT optical upper limit
  19. GRB 120624B: optical observations
  20. GRB 120624B, Swift-BAT refined analysis
  21. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  22. Konus-Wind observation of GRB 120624B
  23. GRB 120624B: Swift detection of a burst
  24. GRB 120624A: Fermi GBM observation
  25. GRB 120624B: Fermi-LAT Detection
  26. Konus-Wind observation of GRB 120624A
  27. GRB 120624B: Fermi GBM detection
  28. IPN Triangulation of GRB 120624A (short/intense)
  29. GRB 120622A: MAXI/GSC detection
  30. Swift trigger 524642 / SwJ1910.2-0546
  31. GRB 120602A: Suzaku WAM observation of the prompt emission
  32. Konus-Wind observation of GRB 120617A
  33. IPN Triangulation of GRB 120617A (short/intense)
  34. Konus-Wind observation of GRB 120602A
  35. IPN Triangulation of GRB 120602A (long/very bright)
  36. GRB 120614A: MAXI/GSC detection of a burst
  37. GRB 120612A: optical observations
  38. GRB 120612A: Swift/UVOT observations
  39. GRB 120612A: Swift-XRT refined Analysis
  40. GRB 120612A: Swift-BAT refined analysis
  41. GRB 120612A: Enhanced Swift-XRT position
  42. GRB 120612A: BOOTES-3 optical upper limit
  43. GRB 120612A: Swift detection of a burst
  44. GRB 120603A: Suzaku WAM observation of the prompt emission
  45. Konus-Wind observation of GRB 120603A
  46. IPN Triangulation of short GRB 120603A
  47. Fermi GBM trigger 120602.539 is not a GRB
  48. Konus-Wind observation of GRB 120528B
  49. GRB 120519A: Suzaku WAM observation of the prompt emission
  50. GRB 120528C: MAXI/GSC detection
  51. GRB 120521C redshift estimate
  52. Fermi Gamma-ray Burst Monitor trigger 120527.573 is not a GRB
  53. GRB 120528B: MAXI/GSC detection
  54. GRB 120512A: Suzaku WAM observation of the prompt emission
  55. GRB 120521C: EVLA Localization of Afterglow
  56. GRB 120521C: EVLA 22 GHz Detection
  57. GRB120521B: SSO 2.3m upper limits
  58. Konus-Wind observation of GRB 120522A
  59. IPN triangulation of GRB 120522A (long/intense)
  60. GRB 120521B: Fermi GBM observation
  61. GRB 120521A: ATCA 34GHz upper limit
  62. GRB 120521C: Early Tautenburg limits
  63. GRB 120521C: EVLA 22 GHz Upper Limit
  64. GRB 120521A: GROND Upper limits
  65. GRB 120521C: Swift-XRT refined Analysis
  66. GRB 120521C: Swift-BAT refined analysis
  67. GRB 120521C: Keck Observations
  68. GRB 120521C: Swift/UVOT Upper Limits
  69. GRB 120521B: Swift/UVOT Upper Limits
  70. GRB 120521C: MASTER optical limit
  71. GRB 120521B: GROND Upper limits
  72. GRB 120521A: XRT light curve (Correction to GCN 13326)
  73. GRB 120521A: Swift-XRT refined Analysis
  74. GRB 120521C: PAIRITEL NIR Upper Limits
  75. GRB 120521C: Enhanced Swift-XRT position
  76. GRB 120521C: BOOTES-1 optical observations
  77. GRB 120521C: WHT optical observations
  78. GRB 120521C - NOT optical limits
  79. GRB120521C: Liverpool Telescope observations
  80. GRB 120521C: TAROT Calern observatory optical observations
  81. GRB 120521C: Swift detection of a burst
  82. GRB 120521B: Swift-BAT refined analysis
  83. GRB 120521B: Swift-XRT refined Analysis
  84. Konus-Wind observation of GRB 120519A
  85. Swift starts a new program to find fainter transients
  86. IPN Triangulation of GRB 120519A (short/hard)
  87. GRB 120521A: Swift/UVOT Upper Limits
  88. GRB 120521B: Enhanced Swift-XRT position
  89. GRB 120521A: Swift-BAT refined analysis
  90. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  91. GRB 120521B: TAROT La Silla observatory optical observations
  92. GRB 120521B: Swift detection of a burst
  93. GRB 120521A: Enhanced Swift-XRT position
  94. GRB 120521A: TAROT La Silla observatory optical observations
  95. GRB 120521A: Swift detection of a short burst
  96. GRB 120514A : Suzaku WAM observation of the prompt emission
  97. GRB 120512A: A long GRB detected by INTEGRAL
  98. GRB 120514A: GROND upper limits
  99. GRB 120514A: Swift/UVOT Upper Limits
  100. GRB 120514A: UKIRT IR 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