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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"

23686 results found.

  1. GRB 090306B: INTEGRAL SPI-ACS light curve
  2. GRB 090309, Swift-BAT refined analysis
  3. GRB 090308: GROND observations
  4. GRB 090309: Swift detection of a burst
  5. GRB 090307B: Fermi GBM detection
  6. GRB 090306C: Fermi GBM detection
  7. GRB 090307: GROND Upper Limits
  8. GRB 090306B: GROND Upper Limits
  9. GRB 090305C: Suzaku WAM observation of the prompt emission
  10. GRB 090308: Swift-BAT refined analysis
  11. GRB 090308: Swift detection of a burst
  12. GRB 090307: Swift-BAT refined analysis of trigger 345551
  13. GRB 090306B: Burst detection from Swift-BAT slew data
  14. Swift Trigger 345551 is probably not a GRB
  15. IPN localization of short GRB 090305C
  16. GRB 090306: Swift detection of a possible burst
  17. GRB 090305, Swift-BAT refined analysis
  18. GRB 090227A: Suzaku WAM observation of the prompt emission
  19. GRB 090305: Magellan confirmation of the optical afterglow
  20. GRB 090305: Swift detection of a short burst
  21. GRB 090301A: Suzaku WAM observation of the prompt emission
  22. Konus-RF catches first GRB and SGR bursts
  23. Konus-Wind observation of bright short GRB 090227B
  24. IPN localization of short bright GRB 090227B
  25. Konus-Wind observation of GRB 090301A
  26. GRB 090301A: Swift-BAT refined analysis
  27. GRB 090301: Swift detection of a burst
  28. Ongoing activity of AXP/SGR 1E1547.0-5408
  29. GRB 090219: Fermi GBM detection
  30. Swift Trigger 343319 is not a GRB
  31. GRB 090217: Suzaku WAM observation of the prompt emission
  32. Konus-Wind observation of GRB 090217
  33. IPN localization of GRB 090217
  34. SGR activity seen by BAT during ICSP Ionospheric Events
  35. Detailed lightcurves of ICSP VLF Observation of SGR/AXP 1E1547.0-5408
  36. GRB 090207 - Fermi GBM Observations
  37. GRB 090205: Swift/UVOT Upper Limits
  38. GRB 090205: Swift-XRT refined analysis
  39. GRB 090205: Swift burst of interest
  40. GRB 090205: GROND observations and photometric redshift estimate
  41. GRB 090205: Swift-BAT refined analysis
  42. GRB 090205: Swift detection of a burst
  43. GRB 090131: Suzaku WAM observation of the prompt emission
  44. GRB 090126A: Swift-XRT afterglow confirmation
  45. Konus-Wind observation of GRB 090201
  46. GRB 090201: Swift-BAT refined analysis
  47. GRB090113: MAGIC telescope GeV observation
  48. GRB 090201: Swift detection of a burst
  49. GRB 090126A: Swift/UVOT Upper Limits
  50. Konus-Wind observation of bright burst from AXP/SGR 1E1547.0-5408 on January 29
  51. GRB 090129: Swift-BAT refined analysis
  52. GRB 090129: Swift detection of a burst
  53. Konus-Wind observation of AXP/SGR 1E1547.0-5408 bursting activity
  54. AXP 1E1547.0-5408: RHESSI observations up to 400 keV
  55. GRB 090126A: Swift-XRT Refined Analysis
  56. GRB 090126: SuperAGILE Localization of a Long GRB
  57. Konus-Wind detection of very bright SGR-like burst on January 25, 2009
  58. AXP 1E1547.0-5408: Suzaku WAM detections of the current activity
  59. GRB 090123: Swift-BAT refined analysis
  60. GRB 090123: Swift detection of a burst
  61. AXP 1E1547.0-5408: long bursts with INTEGRAL SPI-ACS
  62. AXP 1E1547.0-5408: Fermi GBM detection of additional bursts
  63. AXP 1E1547.0-5408: INTEGRAL SPI-ACS confirms activity increase
  64. GRB 090117C: Suzaku WAM observation of the prompt emission
  65. Trigger 340734: Swift detection of a possible short burst
  66. AXP 1E1547.0-5408 activity with SGR bursts
  67. GRB 090118: Subaru NIR Observation
  68. GRB 090118: Swift-XRT observations
  69. GRB 090117C - Fermi GRB Detection
  70. GRB 090117 - Fermi GBM Observations
  71. GRB 090117 - SuperAGILE Localization of a long GRB
  72. GRB090102: MAGIC telescope GeV observation
  73. GRB 090112B: Suzaku WAM observation of the prompt emission
  74. GRB 090113: LOAO Detection Limits in R, I, z, Y-band
  75. GRB 090113: Swift-BAT refined analysis
  76. GRB 090112B: Fermi GBM Detection
  77. GRB 090113: Swift detection of a burst
  78. GRB 090112: Fermi GBM detection
  79. GRB 090111, Swift-BAT refined analysis
  80. GRB 090111: Swift detection of a burst
  81. GRB 090107B: Suzaku WAM observation of the prompt emission
  82. GRB 090107B: Swift XRT afterglow confirmation
  83. GRB 090107B: Swift-XRT detection of possible afterglow
  84. GRB 090107B: a long GRB localized by INTEGRAL
  85. Fermi/GBM detection of GRB 081226A
  86. Fermi/GBM detection of GRB 081225
  87. GRB 090107: Swift-BAT refined analysis
  88. GRB 090107: Swift detection of a burst
  89. GRB 081231: Fermi GBM Detection
  90. Swift triggered on the HMXB 1A 1118-61
  91. Konus-Wind observation of GRB 090102
  92. GRB 081229: Fermi GBM detection
  93. GRB 090102: P60 Imaging and P200 Spectroscopy
  94. GRB 090102: GROND observations of the optical afterglow
  95. GRB 090102: Swift-BAT refined analysis
  96. GRB 090102: Swift XRT refined analysis
  97. GRB 090102: TAROT Calern observatory optical light curve
  98. GRB 090102: TAROT Calern observatory optical observations
  99. GRB 081230: GROND confirmation of the afterglow
  100. GRB 081230, Swift-BAT refined analysis

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