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"

20008 results found.

  1. GRB 090417A: Swift-BAT refined analysis
  2. GRB 090417A: Early-type nature of the putative host
  3. GRB 090417A: nearby galaxy redshift
  4. GRB 090417B: Swift detection of a burst
  5. GRB 090417: 2MASS galaxy within BAT Localization
  6. GRB 090417: Swift detection of a short burst
  7. GRB 090410: Suzaku WAM observation of the prompt emission
  8. GRB 090410: Swift-BAT refined analysis
  9. GRB 090410: Swift detection of a burst
  10. Swift-BAT Trigger 348781 is not a GRB
  11. Swift-BAT Trigger 348720 is not a GRB
  12. GRB090408, RIMOTS optical upper limits
  13. Swift-BAT trigger 348781: almost certainly not a burst
  14. GRB 090408B: MASTER II-Kourovka optical observations
  15. GRB 090408: Swift detection of a burst
  16. GRB 090407: Swift-XRT refined analysis
  17. GRB 090407: Swift UVOT Upper Limits
  18. GRB 090407: Enhanced Swift-XRT position
  19. GRB 090407: Swift-BAT refined analysis
  20. GRB 090407: ROTSE-III Optical Limits
  21. GRB 090407: Swift detection of a burst
  22. GRB 090404: millimeter detection
  23. GRB 090404: nIR observations at Calar Alto
  24. Swift/UVOT observations of GRB090404
  25. GRB 090404: optical observations at BOOTES-3 and 1.5-m OSN
  26. GRB 090404: Swift-XRT Team refined analysis
  27. GRB 090404: Swift-BAT refined analysis
  28. GRB 090404: Enhanced Swift-XRT position
  29. GRB 090404: Swift detection of a burst
  30. GRB 090401A: Suzaku WAM observation of the prompt emission
  31. GRB 090401B: Suzaku WAM observation of the prompt emission
  32. Konus-Wind observation of GRB 090401B
  33. GRB 090401B: VLA radio upper limit
  34. GRB090401B, RIMOTS optical upper limits
  35. Swift/UVOT observations of GRB090401B
  36. Swift/UVOT observations of GRB090401B
  37. GRB 090401B: Swift XRT Refined Analysis
  38. Konus-Wind observation of GRB 090401A
  39. GRB 090401B: Enhanced Swift-XRT position
  40. GRB 090401B: Swift-BAT refined analysis
  41. Swift/UVOT detection of GRB090401B
  42. GRB 090401B: Swift detection of a burst
  43. GRB 090401, Swift-BAT refined analysis
  44. GRB 090401: Swift detection of a burst
  45. GRB 090328: Swift XRT refined analysis
  46. GRB 090328: Swift UVOT observations
  47. GRB 090328: Updated position/optical afterglow candidate
  48. GRB 090328: Possible Swift/XRT detection
  49. Fermi LAT and GBM detections of GRB090328
  50. GRB 090323: UVOT Detection of Afterglow
  51. GRB 090323: Swift-XRT refined analysis
  52. GRB 090323: GROND Detection of the Afterglow and Photo-z
  53. SGR J1550-5418: two Fermi GBM triggers on March 22
  54. GRB 090323: Possible XRT Counterpart
  55. A bright burst from AXP 1E 1547.0-5408/SGR J1550-5418
  56. IPN Triangulation of GRB090315 and Tupi Detection of Muon Increase
  57. Further Swift/UVOT observations of GRB 090313
  58. GRB 090313: detection with CARMA in 3mm band
  59. GRB 090313: TAROT La Silla observatory optical detection
  60. GRB 090313: Zadko Telescope observations
  61. GRB 090313 - PAIRITEL NIR detections
  62. GRB 090313: Swift-XRT refined analysis
  63. GRB 090313: Swift/UVOT upper limits
  64. GRB 090313: Faulkes Telescope North observations
  65. GRB 090306B: Confirmation of the X-ray afterglow
  66. GRB 090313: Swift-BAT refined analysis
  67. GRB 090313, GROND observations
  68. GRB 090309, Swift-BAT lag analysis
  69. GRB 090313: Swift detection of a burst
  70. GRB 090313: Swift detection of a burst
  71. Swift trigger 346250 is probably not a burst
  72. GRB 090309A: GROND upper limits
  73. GRB 090307A: TAROT Calern observatory optical observations
  74. GRB 090309: Swift/UVOT Upper Limits
  75. GRB 090309: Swift-XRT refined analysis
  76. GRB 090309: Enhanced Swift-XRT position
  77. GRB 090306B: INTEGRAL SPI-ACS light curve
  78. GRB 090309, Swift-BAT refined analysis
  79. GRB 090308: GROND observations
  80. GRB 090308: Gemini GMOS Observations
  81. GRB 090309: Swift detection of a burst
  82. GRB 090308: Swift/UVOT Upper Limits
  83. GRB 090307: GROND Upper Limits
  84. GRB 090306B: GROND Upper Limits
  85. GRB 090305C: Suzaku WAM observation of the prompt emission
  86. GRB 090308: Swift-XRT refined analysis
  87. Radio observation of GRB 081007 with ATCA
  88. ATCA observation of SGR J1550-5418
  89. GRB 090308: Swift-BAT refined analysis
  90. GRB 090308: Swift detection of a burst
  91. GRB 090306B: Possible XRT afterglow
  92. GRB 090307: Swift-XRT afterglow confirmation and analysis
  93. GRB 090307: Swift-BAT refined analysis of trigger 345551
  94. GRB 090306B: Burst detection from Swift-BAT slew data
  95. Swift Trigger 345551 is probably not a GRB
  96. Swift-BAT trigger 345396 is not a GRB
  97. IPN localization of short GRB 090305C
  98. GRB 090306: Swift detection of a possible burst
  99. GRB 090305: Swift/UVOT Upper Limits
  100. GRB 090305: Swift-XRT refined analysis

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