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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"

26510 results found.

  1. GRB 090301B: Fermi GBM detection
  2. GRB 090227B: Fermi GBM detection
  3. GRB 090301: Swift detection of a burst
  4. GRB 090228: Fermi GBM detection
  5. GRB 090227: Fermi GBM detection
  6. GRB 090206: Fermi GBM detection
  7. SGR J1550-5418
  8. GRB 081211B: Nearby cluster
  9. Ongoing activity of AXP/SGR 1E1547.0-5408
  10. GRB 090222: Fermi GBM detection
  11. GRB 090219: Fermi GBM detection
  12. GRB 090217: Suzaku WAM observation of the prompt emission
  13. GRB090217: XRT analysis
  14. Konus-Wind observation of GRB 090217
  15. IPN localization of GRB 090217
  16. GRB090217: Fermi-LAT Detection
  17. GRB 090217: Fermi GBM detection
  18. SGR activity seen by BAT during ICSP Ionospheric Events
  19. Detailed lightcurves of ICSP VLF Observation of SGR/AXP 1E1547.0-5408
  20. GRB 090207 - Fermi GBM Observations
  21. GRB 090129: Fermi GBM detection
  22. VLA radio upper limit on GRB 090205
  23. GRB 090205: VLT optical decay
  24. GRB 090205: Swift/UVOT Upper Limits
  25. GRB 090205: Swift-XRT refined analysis
  26. GRB 090205: Swift burst of interest
  27. GRB 090205: VLT spectroscopic redshift
  28. GRB 090205: GROND observations and photometric redshift estimate
  29. GRB 090205: Swift-BAT refined analysis
  30. GRB 090205: Enhanced Swift-XRT position
  31. GRB 090205: Swift detection of a burst
  32. GRB 090131: Suzaku WAM observation of the prompt emission
  33. ICSP VLF observation of the signatures of SGR/AXP 1E1547.0-5408 bursts
  34. GRB 090126A: Swift-XRT afterglow confirmation
  35. Konus-Wind observation of GRB 090201
  36. GRB 090202: Fermi GBM detection
  37. GRB 090131: Fermi GBM detection
  38. GRB 090201: Swift-XRT refined analysis
  39. GRB 090201: Enhanced Swift-XRT position
  40. GRB 090201: VLT NIR observations
  41. GRB 090201: Swift-BAT refined analysis
  42. GRB 090201: Swift detection of a burst
  43. Konus-Wind observation of bright burst from AXP/SGR 1E1547.0-5408 on January 29
  44. GRB 090129: Swift-BAT refined analysis
  45. GRB 090129: Swift detection of a burst
  46. Konus-Wind observation of AXP/SGR 1E1547.0-5408 bursting activity
  47. AXP 1E1547.0-5408: RHESSI observations up to 400 keV
  48. GRB 090126A: Swift-XRT Refined Analysis
  49. GRB 090126B: Fermi GBM detection
  50. Konus-Wind detection of very bright SGR-like burst on January 25, 2009
  51. GRB 090118: no afterglow candidate
  52. GRB 090123: GROND detection
  53. GRB 090123: Swift XRT refined analysis
  54. AXP 1E1547.0-5408: Suzaku WAM detections of the current activity
  55. GRB 090123: Swift-BAT refined analysis
  56. GRB090123: Enhanced Swift-XRT position
  57. GRB 090123: Swift detection of a burst
  58. AXP 1E1547.0-5408: long bursts with INTEGRAL SPI-ACS
  59. AXP 1E1547.0-5408: Fermi GBM detection of additional bursts
  60. GRB 090117C: Suzaku WAM observation of the prompt emission
  61. AXP 1E1547.0-5408: Fermi GBM observations
  62. Trigger 340734: Swift detection of a possible short burst
  63. AXP 1E1547.0-5408 activity with SGR bursts
  64. GRB 090118: Subaru NIR Observation
  65. GRB 090118 (BATSS): GRT Optical Observation
  66. GRB 090118: Possible burst detection from Swift-BAT slew data
  67. GRB 090117: confirmation of the X-ray afterglow
  68. GRB 090117C - Fermi GRB Detection
  69. GRB 090117 - Fermi GBM Observations
  70. GRB090117: Swift-XRT detection of a possible candidate afterglow
  71. GRB 090117 - SuperAGILE Localization of a long GRB
  72. GRB 090112B: Suzaku WAM observation of the prompt emission
  73. GRB 090113: LOAO Detection Limits in R, I, z, Y-band
  74. GRB 090113: GROND Upper Limits
  75. GRB 090113: Swift-XRT refined analysis
  76. GRB 090113: Enhanced Swift-XRT position
  77. GRB 090113: Swift-BAT refined analysis
  78. GRB 090112B: Fermi GBM Detection
  79. GRB 090113: Swift detection of a burst
  80. GRB 090112: Fermi GBM detection
  81. GRB 090109: Fermi GBM detection
  82. GRB 090108B: Fermi GBM detection
  83. GRB 090111, Swift-BAT refined analysis
  84. GRB 090108: Fermi GBM Detection
  85. GRB 090111: Swift-XRT refined analysis
  86. GRB 090111: Enhanced Swift-XRT position
  87. GRB 090111: Swift detection of a burst
  88. GRB 090107B: Suzaku WAM observation of the prompt emission
  89. GRB090107B: Fermi GBM Detection
  90. GRB 090107B: Swift XRT afterglow confirmation
  91. GRB 090107B: a long GRB localized by INTEGRAL
  92. Fermi/GBM detection of GRB 081226A
  93. Fermi/GBM detection of GRB 081225
  94. GRB 090107: Swift-BAT refined analysis
  95. GRB 090107: Swift detection of a burst
  96. GRB 081231: Fermi GBM Detection
  97. GRB 090102: optical decay
  98. VLA radio upper limit on GRB 090102
  99. GRB 090102: GRT Optical Observation
  100. Konus-Wind observation of GRB 090102

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