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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"

38574 results found.

  1. GRB 090307: Swift-BAT refined analysis of trigger 345551
  2. Swift Trigger 345551 is probably not a GRB
  3. Swift-BAT trigger 345396 is not a GRB
  4. IPN localization of short GRB 090305C
  5. Fermi GBM trigger 090305784 is not a GRB
  6. GRB 090306: Swift detection of a possible burst
  7. GRB 090305: Swift/UVOT Upper Limits
  8. GRB 090305: Swift-XRT refined analysis
  9. GRB 090227A: Suzaku WAM observation of the prompt emission
  10. GRB 090305: Magellan confirmation of the optical afterglow
  11. GRB090305: GMOS-S Candidate Optical Afterglow
  12. GRB 090305: Swift detection of a short burst
  13. GRB 090303: Fermi GBM detection
  14. GRB 090304: Fermi GBM detection
  15. GRB 090301A: Suzaku WAM observation of the prompt emission
  16. Konus-RF catches first GRB and SGR bursts
  17. GRB 090228B: Fermi GBM detection
  18. Konus-Wind observation of bright short GRB 090227B
  19. IPN localization of short bright GRB 090227B
  20. Konus-Wind observation of GRB 090301A
  21. GRB 090301A: Swift-BAT refined analysis
  22. GRB 090301B: Fermi GBM detection
  23. GRB 090227B: Fermi GBM detection
  24. GRB 090301: Swift detection of a burst
  25. GRB 090228: Fermi GBM detection
  26. GRB 090227: Fermi GBM detection
  27. GRB 090206: Fermi GBM detection
  28. SGR J1550-5418
  29. GRB 081211B: Nearby cluster
  30. Ongoing activity of AXP/SGR 1E1547.0-5408
  31. GRB 090222: Fermi GBM detection
  32. GRB 090219: Fermi GBM detection
  33. Swift Trigger 343319 is not a GRB
  34. GRB 090217: Suzaku WAM observation of the prompt emission
  35. GRB090217: XRT analysis
  36. Konus-Wind observation of GRB 090217
  37. IPN localization of GRB 090217
  38. GRB 090213: Fermi GBM detection
  39. GRB090217: Fermi-LAT Detection
  40. GRB 090217: Fermi GBM detection
  41. SGR activity seen by BAT during ICSP Ionospheric Events
  42. Detailed lightcurves of ICSP VLF Observation of SGR/AXP 1E1547.0-5408
  43. GRB 090207 - Fermi GBM Observations
  44. Fermi Gamma-ray Burst Monitor trigger 255729682 is not a GRB
  45. GRB 090129: Fermi GBM detection
  46. VLA radio upper limit on GRB 090205
  47. GRB 090205: VLT optical decay
  48. Fermi Gamma-ray Burst Monitor trigger 255541748 cannot be classified
  49. GRB 090205: Swift/UVOT Upper Limits
  50. GRB 090205: VLT refined redshift
  51. GRB 090205: Swift-XRT refined analysis
  52. GRB 090205: Swift burst of interest
  53. GRB 090205: VLT spectroscopic redshift
  54. GRB 090205: GROND observations and photometric redshift estimate
  55. GRB 090205: VLT candidate afterglow
  56. GRB 090205: Enhanced Swift-XRT position
  57. GRB 090205: Swift detection of a burst
  58. GRB 080319B: IceCube upper limit on high-energy neutrino flux
  59. GRB 090131: Suzaku WAM observation of the prompt emission
  60. GRB 090126A: Swift-XRT afterglow confirmation
  61. Fermi Gamma-ray Burst Monitor trigger 255342766 is not a GRB
  62. Konus-Wind observation of GRB 090201
  63. GRB 090202: Fermi GBM detection
  64. GRB 090131: Fermi GBM detection
  65. GRB 090201: Swift-XRT refined analysis
  66. GRB090201: Swift UVOT upper limits
  67. GRB 090201: object inside the enhanced XRT error circle
  68. GRB 090201: Enhanced Swift-XRT position
  69. GRB 090201: VLT NIR observations
  70. GRB 090201: VLT afterglow candidate
  71. GRB 090201: Swift-XRT detection of the possible X-ray afterglow
  72. GRB090113: MAGIC telescope GeV observation
  73. GRB 090201: ROTSE-III Optical Limits
  74. GRB 090201: Swift detection of a burst
  75. GRB 090126A: Swift/UVOT Upper Limits
  76. Konus-Wind observation of bright burst from AXP/SGR 1E1547.0-5408 on January 29
  77. GRB 090129: Swift detection of a burst
  78. IBAS Alert N. 5442 is not a GRB
  79. Suzaku ToO Observation of AXP 1E 1547.0-5408
  80. Konus-Wind observation of AXP/SGR 1E1547.0-5408 bursting activity
  81. AXP 1E1547.0-5408: RHESSI observations up to 400 keV
  82. GRB 090102: HST observations and host galaxy
  83. GRB 090126C: Fermi GBM detection
  84. GRB 090126A: Swift-XRT Refined Analysis
  85. GRB 090126B: Fermi GBM detection
  86. GRB 090126: SuperAGILE Localization of a Long GRB
  87. Konus-Wind detection of very bright SGR-like burst on January 25, 2009
  88. GRB 090118: no afterglow candidate
  89. GRB 090123: GROND detection
  90. 1E1547.0-5408: Swift detection of dust halo
  91. GRB 090123: Swift XRT refined analysis
  92. GRB 090123: Swift/UVOT Observations
  93. AXP 1E1547.0-5408: Suzaku WAM detections of the current activity
  94. GRB090123: Enhanced Swift-XRT position
  95. GRB 090123: Swift detection of a burst
  96. AXP 1E1547.0-5408: long bursts with INTEGRAL SPI-ACS
  97. Swift-BAT trigger 340734 is not a GRB
  98. AXP 1E1547.0-5408: Fermi GBM detection of additional bursts
  99. AXP 1E1547.0-5408: INTEGRAL SPI-ACS confirms activity increase
  100. GRB 090117C: Suzaku WAM observation of the prompt emission

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