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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"

38573 results found.

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

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