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"

36211 results found.

  1. GRB 100418A: ROTSE-III Optical Limits
  2. GRB 100418A: Swift detection of a burst with a possible optical afterglow
  3. GRB 100413A: Radio Afterglow Detection with the EVLA
  4. GRB 100414A: Suzaku WAM observation of the prompt emission
  5. GRB 100414A: Swift/UVOT Observations
  6. GRB 100414A: Gemini-N observation (correction)
  7. GRB 100414A: GROND Detection of the Optical Afterglow
  8. GRB 100414A: Gemini-N candidate and redshift
  9. GRB 100414A: Enhanced Swift-XRT position of candidate afterglow
  10. GRB 100413A: Suzaku WAM observation of the prompt emission
  11. GRB 100414A: Palomar Transient Factory Observations
  12. GRB 100413B: Swift Confirmation of Burst
  13. GRB 100414A: Swift-XRT detection of a possible X-ray afterglow
  14. GRB 100413A: Swift-BAT final refined analysis
  15. GRB 100414A: IPN Localization
  16. Konus-Wind observation of GRB 100414A (correction to GCN 10597)
  17. Konus-Wind observation of GRB 100414B
  18. GRB 100415A: MAXI/GSC detection of a probable GRB
  19. GRB 100414A: Fermi GBM detection
  20. GRB100414A: Fermi LAT detection
  21. GRB 100413B : Swift detection of a burst
  22. GRB 100413A: GROND Upper limits
  23. GRB 100413A: Swift/UVOT Upper Limits
  24. Konus-Wind observation of GRB 100413A
  25. GRB 100413A: Faulkes Telescope South observations
  26. Tentative redshift of GRB100413A from X-ray data
  27. GRB 100413A: SARA upper limit
  28. GRB 100413A: Swift-XRT Refined Analysis
  29. GRB 100413A: Swift-BAT initial refined analysis
  30. GRB 100413A: Enhanced Swift-XRT position
  31. GRB 100413: xinglong TNT optical upper limit
  32. GRB 100413A: MASTER-Net optical observations
  33. GRB 100413A: Swift detection of a burst
  34. Swift-BAT trigger 419015 is not astrophysical
  35. Trigger 419015 is probably not a GRB
  36. GRB100401A: GROND Upper Limits
  37. INTEGRAL Alert n. 5995: MASTER-Net optical observations
  38. IBAS Alert n. 5996: not a GRB
  39. IBAS Alert n. 5995: not a GRB
  40. GRB 100331B: GROND Upper limits
  41. GRB 100401A: Swift/UVOT Upper Limit
  42. Swift/BAT trigger 417974 (GRB100401A): Swift/XRT observations
  43. GRB 100401A: Fermi GBM detection
  44. GRB 100401A Burst, possibly short, detected in ground analysis of BAT data
  45. GRB 100331B: BOOTES-3 observations
  46. GRB 100316A: R-band limit
  47. GRB 100324B: Suzaku WAM observation of the prompt emission
  48. GRB 100331B: Swift/UVOT Upper Limits
  49. GRB 100331B: Swift/XRT possible afterglow candidate
  50. GRB 100331B: SuperAGILE Localization of a Long GRB
  51. INTEGRAL trigger 5994 (GRB100331A): Swift/XRT observations
  52. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source
  53. GRB 100331A: BOOTES-3 observations
  54. Konus-Wind observation of GRB 100324B
  55. GRB 100331A: A long GRB detected by INTEGRAL
  56. IPN triangulation of GRB100324B
  57. Konus-Wind observation of GRB 100322A
  58. GRB 100322A: Suzaku WAM observation of the prompt emission
  59. GRB 100325A: Fermi LAT detection
  60. GROND observations of GRB100316D/SN2010bh
  61. GRB 100325A: Fermi GBM detection
  62. GRB 100324A: GROND observations
  63. GRB 100324A found in ground analysis of BAT data
  64. Emerging Supernova in the Afterglow of GRB 100316D
  65. GRB 100322B or possible Galactic transient detected in ground analysis of BAT data
  66. GRB 100316D: Spectroscopic Discovery of a Supernova from Magellan
  67. GRB 100322A: Fermi GBM detection
  68. GRB 100316D: ATCA radio observations
  69. GRB 100319A: correction to GCN 10527
  70. Probable SGR 1833-0832: Swift-XRT refined analysis
  71. GRB 100219A: MASTER-Net optical alert observations
  72. GRB 100319A: Swift detection of a burst; possible SGR
  73. GRB 100316D: Possible Supernova
  74. GRB 100316D: Pre-burst emission measured by BAT
  75. GRB 100316D: Further Gemini observations
  76. GRB 100219A: optical upper limit
  77. GRB 100316A: optical observations in CrAO
  78. GRB 100316D: Swift/UVOT Observations
  79. GRB 100316D: Swift XRT enhanced position and further refined analysis
  80. GRB 100316B: Swift-XRT refined analysis
  81. Tentative redshift of GRB100316D from X-ray data
  82. GRB 100316C: GROND Detection of a Optical/NIR Afterglow Candidate
  83. Trigger 416226 is probably not a GRB
  84. GRB 100316D: GROND Detection of the Optical/NIR Afterglow Candidate
  85. GRB 100316D: Gemini/GMOS and VLT/X-shooter observations
  86. GRB 100316D: VLT/X-shooter observations
  87. GRB 100316D: Swift-BAT refined analysis
  88. GRB100316C: Swift/UVOT Upper Limits
  89. GRB 100316C: Swift-BAT refined analysis
  90. GRB 100316B: Swift/UVOT observations
  91. GRB 100316C: Swift-XRT team refined analysis
  92. GRB 100316C: Enhanced Swift-XRT position
  93. GRB 100316D: Swift XRT refined analysis
  94. GRB 100316A: TAROT Calern observatory optical observations
  95. GRB 100316A: Swift-XRT refined analysis
  96. GRB 100316B: Enhanced Swift-XRT position
  97. GRB 100316A: Swift-BAT refined analysis
  98. GRB 100316B: Swift-BAT refined analysis
  99. GRB100316A: Swift/UVOT Upper Limits
  100. Trigger 416140 is almost certainly not a GRB

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