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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"

28235 results found.

  1. GRB 090313 optical observations
  2. GRB 090313: Ongoing plateau phase
  3. GRB 090313: Swift-XRT refined analysis
  4. GRB 090313: Swift/UVOT upper limits
  5. GRB 090313: Swift-BAT refined analysis
  6. GRB 090313, GROND observations
  7. GRB 090309, Swift-BAT lag analysis
  8. Swift trigger 346250 is probably not a burst
  9. GRB090310: Fermi GBM detection
  10. GRB 090205: Zadko Telescope late-time observations
  11. GRB 090309A: GROND upper limits
  12. GRB 090307A: TAROT Calern observatory optical observations
  13. GRB 090309: Swift/UVOT Upper Limits
  14. GRB090305B: Fermi GBM detection
  15. GRB 090309B: Fermi GBM detection
  16. GRB 090309: Swift-XRT refined analysis
  17. GRB 090309: Enhanced Swift-XRT position
  18. GRB 090309, Swift-BAT refined analysis
  19. GRB 090308: GROND observations
  20. GRB 090308: Gemini GMOS Observations
  21. GRB 090309: Swift detection of a burst
  22. GRB 090308B: Fermi GBM detection
  23. GRB 090308: Swift/UVOT Upper Limits
  24. GRB 090307B: Fermi GBM detection
  25. GRB 090306C: Fermi GBM detection
  26. GRB 090307: GROND Upper Limits
  27. GRB 090306B: GROND Upper Limits
  28. GRB 090308: Swift-XRT refined analysis
  29. Radio observation of GRB 090201 with ATCA
  30. Radio observation of GRB 090117 with ATCA
  31. Radio observation of GRB 081226b with ATCA
  32. Radio observation of GRB 081226a with ATCA
  33. Radio observation of GRB 081007 with ATCA
  34. GRB 090308: Swift-BAT refined analysis
  35. GRB 090308: Swift detection of a burst
  36. GRB 090306B: Possible XRT afterglow
  37. GRB 090307: Swift-XRT afterglow confirmation and analysis
  38. GRB 090307: Swift-BAT refined analysis of trigger 345551
  39. GRB 090306B: Burst detection from Swift-BAT slew data
  40. Swift Trigger 345551 is probably not a GRB
  41. IPN localization of short GRB 090305C
  42. GRB 090306: Swift detection of a possible burst
  43. GRB 090305: Swift/UVOT Upper Limits
  44. GRB 090305: Swift-XRT refined analysis
  45. GRB 090305, Swift-BAT refined analysis
  46. GRB 090227A: Suzaku WAM observation of the prompt emission
  47. GRB090305: GMOS-S Candidate Optical Afterglow
  48. GRB 090305: Swift detection of a short burst
  49. GRB 090303: Fermi GBM detection
  50. GRB 090304: Fermi GBM detection
  51. GRB 090301A: Suzaku WAM observation of the prompt emission
  52. GRB 090228B: Fermi GBM detection
  53. GRB 090301A: Swift-BAT refined analysis
  54. GRB 090301B: Fermi GBM detection
  55. GRB 090227B: Fermi GBM detection
  56. Swift_BAT_Lightcurve Notice for Trigger Number 344565 is not valid
  57. GRB 090228: Fermi GBM detection
  58. GRB 090227: Fermi GBM detection
  59. GRB 090206: Fermi GBM detection
  60. SGR J1550-5418
  61. GRB 081211B: Nearby cluster
  62. GRB 090222: Fermi GBM detection
  63. GRB 090219: Fermi GBM detection
  64. Swift Trigger 343319 is not a GRB
  65. GRB 090217: Suzaku WAM observation of the prompt emission
  66. GRB090217: XRT analysis
  67. GRB 090213: Fermi GBM detection
  68. GRB 090217: Fermi GBM detection
  69. SGR activity seen by BAT during ICSP Ionospheric Events
  70. GRB 090207 - Fermi GBM Observations
  71. GRB 090129: Fermi GBM detection
  72. VLA radio upper limit on GRB 090205
  73. GRB 090205: Swift/UVOT Upper Limits
  74. GRB 090205: Swift-XRT refined analysis
  75. GRB 090205: GROND observations and photometric redshift estimate
  76. GRB 090205: VLT candidate afterglow
  77. GRB 090205: Swift-BAT refined analysis
  78. GRB 090205: Enhanced Swift-XRT position
  79. GRB 090205: Swift detection of a burst
  80. GRB 080319B: IceCube upper limit on high-energy neutrino flux
  81. GRB 090131: Suzaku WAM observation of the prompt emission
  82. GRB 090202: Fermi GBM detection
  83. GRB 090131: Fermi GBM detection
  84. GRB 090201: Swift-XRT refined analysis
  85. GRB090201: Swift UVOT upper limits
  86. GRB 090201: object inside the enhanced XRT error circle
  87. GRB 090201: Enhanced Swift-XRT position
  88. GRB 090201: VLT NIR observations
  89. GRB 090201: Swift-BAT refined analysis
  90. GRB 090201: VLT afterglow candidate
  91. GRB 090201: Swift-XRT detection of the possible X-ray afterglow
  92. GRB090113: MAGIC telescope GeV observation
  93. GRB 090201: ROTSE-III Optical Limits
  94. GRB 090126A: Swift/UVOT Upper Limits
  95. Konus-Wind observation of bright burst from AXP/SGR 1E1547.0-5408 on January 29
  96. GRB 090129: Swift-BAT refined analysis
  97. GRB 090129: Swift detection of a burst
  98. Suzaku ToO Observation of AXP 1E 1547.0-5408
  99. Konus-Wind observation of AXP/SGR 1E1547.0-5408 bursting activity
  100. GRB 090102: HST observations and host galaxy

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