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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"

19324 results found.

  1. GRB 090213: Fermi GBM detection
  2. GRB 090217: Fermi GBM detection
  3. SGR activity seen by BAT during ICSP Ionospheric Events
  4. GRB 090207 - Fermi GBM Observations
  5. GRB 090129: Fermi GBM detection
  6. GRB 090205: Swift-XRT refined analysis
  7. GRB 090205: GROND observations and photometric redshift estimate
  8. GRB 090205: Swift-BAT refined analysis
  9. GRB 090205: Enhanced Swift-XRT position
  10. GRB 090205: Swift detection of a burst
  11. GRB 080319B: IceCube upper limit on high-energy neutrino flux
  12. GRB 090131: Suzaku WAM observation of the prompt emission
  13. GRB 090202: Fermi GBM detection
  14. GRB 090131: Fermi GBM detection
  15. GRB 090201: Swift-XRT refined analysis
  16. GRB 090201: Swift-BAT refined analysis
  17. GRB090113: MAGIC telescope GeV observation
  18. GRB 090201: Swift detection of a burst
  19. Konus-Wind observation of bright burst from AXP/SGR 1E1547.0-5408 on January 29
  20. GRB 090129: Swift-BAT refined analysis
  21. GRB 090129: Swift detection of a burst
  22. Konus-Wind observation of AXP/SGR 1E1547.0-5408 bursting activity
  23. AXP 1E1547.0-5408: RHESSI observations up to 400 keV
  24. GRB 090102: HST observations and host galaxy
  25. GRB 090126C: Fermi GBM detection
  26. GRB 090126A: Swift-XRT Refined Analysis
  27. GRB 090126B: Fermi GBM detection
  28. GRB 090126: SuperAGILE Localization of a Long GRB
  29. 1E1547.0-5408: Swift detection of dust halo
  30. GRB 090123: Swift XRT refined analysis
  31. AXP 1E1547.0-5408: Suzaku WAM detections of the current activity
  32. GRB 090123: Swift-BAT refined analysis
  33. GRB090123: Enhanced Swift-XRT position
  34. GRB 090123: Swift detection of a burst
  35. AXP 1E1547.0-5408: long bursts with INTEGRAL SPI-ACS
  36. AXP 1E1547.0-5408: Fermi GBM detection of additional bursts
  37. GRB 090117C: Suzaku WAM observation of the prompt emission
  38. GRB 090118 (BATSS): GRT Optical Observation
  39. GRB 090118: Swift-XRT observations
  40. GRB 090118: Possible burst detection from Swift-BAT slew data
  41. GRB 090117B : Fermi GBM detection
  42. GRB 090117C - Fermi GRB Detection
  43. GRB 090117 - Fermi GBM Observations
  44. GRB 090117 - SuperAGILE Localization of a long GRB
  45. GRB 090112B: Suzaku WAM observation of the prompt emission
  46. GRB 090113: Swift-XRT refined analysis
  47. GRB 090113: Swift-BAT refined analysis
  48. GRB 090112B: Fermi GBM Detection
  49. GRB 090112: Fermi GBM detection
  50. GRB 090109: Fermi GBM detection
  51. GRB 090108B: Fermi GBM detection
  52. GRB 090111, Swift-BAT refined analysis
  53. GRB 090108: Fermi GBM Detection
  54. GRB 090111: Swift-XRT refined analysis
  55. GRB 090111: Swift detection of a burst
  56. GRB 090107B: Suzaku WAM observation of the prompt emission
  57. GRB090107B: Fermi GBM Detection
  58. GRB 090107B: Swift XRT afterglow confirmation
  59. GRB 090107B: a long GRB localized by INTEGRAL
  60. Fermi/GBM detection of GRB 081226A
  61. Fermi/GBM detection of GRB 081225
  62. GRB 090107: Swift-BAT refined analysis
  63. GRB 081231: Fermi GBM Detection
  64. GRB 090102: GRT Optical Observation
  65. Swift triggered on the HMXB 1A 1118-61
  66. GRB 081229: Fermi GBM detection
  67. GRB 090102 Observations from IAC80
  68. GRB 090102: GROND observations of the optical afterglow
  69. GRB 090102: Swift-BAT refined analysis
  70. GRB 090102: Swift XRT refined analysis
  71. GRB 090102: TAROT Calern observatory optical observations
  72. GRB 081230, Swift-BAT refined analysis
  73. GRB081230: Swift-XRT refined analysis
  74. GRB 081230: ROTSE-III Detection of Optical Counterpart
  75. GRB 081226C: Fermi GBM detection
  76. GRB 081228, Swift-BAT refined analysis
  77. GRB 081228: Swift/UVOT Upper Limits
  78. GRB 081228: Swift-XRT Team refined analysis
  79. GRB 081228: detection by GROND
  80. GRB 081228: Enhanced Swift-XRT position
  81. GRB 081226B: Swift XRT and UVOT upper limits
  82. GRB 081224: Suzaku WAM observation of the prompt emission
  83. GRB 081226: Swift-XRT refined analysis
  84. GRB 081226A: Swift-BAT refined analysis
  85. GRB 081226B: a short-hard GRB detected by INTEGRAL
  86. GRB 081224: Swift-XRT observation
  87. GRB 081224: Fermi GBM Detection & LAT Localization
  88. GRB 080810: optical observations
  89. Konus-Wind observation of GRB 081222
  90. GRB 081223: Fermi GBM detection
  91. GRB 081222: Fermi GBM observation
  92. GRB 081204C: Fermi GBM detection
  93. GRB 081222, Swift-BAT refined analysis
  94. GRB 081221, Swift-BAT refined analysis
  95. GRB081221: Fermi GBM observation
  96. IPN triangulation of bright GRB 081215A
  97. GRB 081222: Faulkes Telescope South observations
  98. GRB081222, optical observation
  99. GRB081203A: BTA observation
  100. Konus-Wind observation of GRB 081221

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