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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"

23608 results found.

  1. GRB 090323: GROND Detection of the Afterglow and Photo-z
  2. GRB 090323: Possible XRT Counterpart
  3. IPN triangulation of GRB090323
  4. GRB 090320B: Fermi GBM detection.
  5. GRB 090319: Fermi GBM detection
  6. A bright burst from AXP 1E 1547.0-5408/SGR J1550-5418
  7. GRB 090315: Suzaku WAM observation of the prompt emission
  8. Konus-Wind observation of GRB 090315
  9. IPN Triangulation of GRB090315 and Tupi Detection of Muon Increase
  10. GRB090305B: MASTER-net prompt optical short burst observations
  11. GRB 090313: MITSuME Okayama observation
  12. GRB 090313: TAROT La Silla observatory optical detection
  13. GRB 090313: Zadko Telescope observations
  14. GRB 090313: Faulkes Telescope North observations
  15. GRB 090313: Swift-BAT refined analysis
  16. GRB 090309, Swift-BAT lag analysis
  17. GRB090310: Fermi GBM detection
  18. GRB 090205: Zadko Telescope late-time observations
  19. GRB 090309A: GROND upper limits
  20. GRB 090307A: TAROT Calern observatory optical observations
  21. GRB090305B: Fermi GBM detection
  22. GRB 090309B: Fermi GBM detection
  23. GRB 090306B: INTEGRAL SPI-ACS light curve
  24. GRB 090309, Swift-BAT refined analysis
  25. GRB 090308: GROND observations
  26. GRB 090309: Swift detection of a burst
  27. GRB 090307B: Fermi GBM detection
  28. GRB 090306C: Fermi GBM detection
  29. GRB 090307: GROND Upper Limits
  30. GRB 090306B: GROND Upper Limits
  31. GRB 090305C: Suzaku WAM observation of the prompt emission
  32. GRB 090308: Swift-BAT refined analysis
  33. GRB 090308: Swift detection of a burst
  34. GRB 090307: Swift-BAT refined analysis of trigger 345551
  35. GRB 090306B: Burst detection from Swift-BAT slew data
  36. Swift Trigger 345551 is probably not a GRB
  37. IPN localization of short GRB 090305C
  38. GRB 090306: Swift detection of a possible burst
  39. GRB 090305, Swift-BAT refined analysis
  40. GRB 090227A: Suzaku WAM observation of the prompt emission
  41. GRB 090305: Magellan confirmation of the optical afterglow
  42. GRB 090305: Swift detection of a short burst
  43. GRB 090301A: Suzaku WAM observation of the prompt emission
  44. Konus-RF catches first GRB and SGR bursts
  45. Konus-Wind observation of bright short GRB 090227B
  46. IPN localization of short bright GRB 090227B
  47. Konus-Wind observation of GRB 090301A
  48. GRB 090301A: Swift-BAT refined analysis
  49. GRB 090301: Swift detection of a burst
  50. Ongoing activity of AXP/SGR 1E1547.0-5408
  51. GRB 090219: Fermi GBM detection
  52. Swift Trigger 343319 is not a GRB
  53. GRB 090217: Suzaku WAM observation of the prompt emission
  54. Konus-Wind observation of GRB 090217
  55. IPN localization of GRB 090217
  56. SGR activity seen by BAT during ICSP Ionospheric Events
  57. Detailed lightcurves of ICSP VLF Observation of SGR/AXP 1E1547.0-5408
  58. GRB 090207 - Fermi GBM Observations
  59. GRB 090205: Swift/UVOT Upper Limits
  60. GRB 090205: Swift-XRT refined analysis
  61. GRB 090205: Swift burst of interest
  62. GRB 090205: GROND observations and photometric redshift estimate
  63. GRB 090205: Swift-BAT refined analysis
  64. GRB 090205: Swift detection of a burst
  65. GRB 090131: Suzaku WAM observation of the prompt emission
  66. GRB 090126A: Swift-XRT afterglow confirmation
  67. Konus-Wind observation of GRB 090201
  68. GRB 090201: Swift-BAT refined analysis
  69. GRB090113: MAGIC telescope GeV observation
  70. GRB 090201: Swift detection of a burst
  71. GRB 090126A: Swift/UVOT Upper Limits
  72. Konus-Wind observation of bright burst from AXP/SGR 1E1547.0-5408 on January 29
  73. GRB 090129: Swift-BAT refined analysis
  74. GRB 090129: Swift detection of a burst
  75. Konus-Wind observation of AXP/SGR 1E1547.0-5408 bursting activity
  76. AXP 1E1547.0-5408: RHESSI observations up to 400 keV
  77. GRB 090126A: Swift-XRT Refined Analysis
  78. GRB 090126: SuperAGILE Localization of a Long GRB
  79. Konus-Wind detection of very bright SGR-like burst on January 25, 2009
  80. AXP 1E1547.0-5408: Suzaku WAM detections of the current activity
  81. GRB 090123: Swift-BAT refined analysis
  82. GRB 090123: Swift detection of a burst
  83. AXP 1E1547.0-5408: long bursts with INTEGRAL SPI-ACS
  84. AXP 1E1547.0-5408: Fermi GBM detection of additional bursts
  85. AXP 1E1547.0-5408: INTEGRAL SPI-ACS confirms activity increase
  86. GRB 090117C: Suzaku WAM observation of the prompt emission
  87. Trigger 340734: Swift detection of a possible short burst
  88. AXP 1E1547.0-5408 activity with SGR bursts
  89. GRB 090118: Subaru NIR Observation
  90. GRB 090118: Swift-XRT observations
  91. GRB 090117C - Fermi GRB Detection
  92. GRB 090117 - Fermi GBM Observations
  93. GRB 090117 - SuperAGILE Localization of a long GRB
  94. GRB090102: MAGIC telescope GeV observation
  95. GRB 090112B: Suzaku WAM observation of the prompt emission
  96. GRB 090113: LOAO Detection Limits in R, I, z, Y-band
  97. GRB 090113: Swift-BAT refined analysis
  98. GRB 090112B: Fermi GBM Detection
  99. GRB 090113: Swift detection of a burst
  100. GRB 090112: Fermi GBM detection

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