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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"

11847 results found.

  1. GRB 100724B: Fermi LAT and GBM analysis
  2. GRB 100724A: Swift XRT refined analysis
  3. GRB 100724A: Swift-BAT refined analysis
  4. GRB 100724A: Swift detection of a burst
  5. GRB 100718A: MASTER-Net optical prompt and alert observations
  6. GRB 100713A: Swift XRT refined analysis
  7. GRB100713A: Swift X-ray afterglow detection
  8. GRB 100713A: a long GRB detected by INTEGRAL
  9. Konus-Wind observation of GRB 100707A
  10. GRB 100707A: Fermi LAT detection
  11. Konus-Wind observation of GRB 100701B
  12. Konus-Wind observation of GRB 100704A
  13. GRB 100703A: a short GRB detected by INTEGRAL
  14. GRB 100704A: Fermi GBM observation
  15. GRB 100702: ROTSE-III Optical Limits
  16. GRB 100615A: Chandra X-ray ToO Observation
  17. XRF 100701A : MAXI/GSC detection of a probable XRF
  18. GRB 100614A: CrAO optical limit
  19. Konus-Wind observation of GRB 100625A
  20. GRB 100625A : IRSF/SIRIUS NIR upper limit
  21. GRB 100625A: Swift-XRT Team refined analysis
  22. GRB 100625A: Swift detection of a short hard burst
  23. GRB 100418A: late time optical observations
  24. Konus-Wind observation of GRB 100621A
  25. GRB 100621A: Swift XRT refined analysis
  26. GRB 100621A: GROND observation of bright NIR afterglow
  27. GRB 100621A: ROTSE-III Optical Limits
  28. GRB 100606A: Optical Limits
  29. GRB 100619A: Swift-BAT refined analysis
  30. GRB 100619A: Swift detection of a burst
  31. XRF 100616a : MAXI/GSC detection of a probable XRF
  32. GRB 100615A: Swift-XRT refined analysis
  33. GRB 100614A: Swift-XRT refined analysis
  34. GRB 100615A: GROND observations, upper limits
  35. GRB 100615A: Swift detection of a burst
  36. GRB 100614A: Swift detection of a burst
  37. Trigger 424161: Swift/BAT trigger on XTE J1946+274/GRO J1944+26
  38. Konus-Wind observation of GRB 100606A
  39. GRB 100606A Swift-XRT refined analysis
  40. GRB 100606A: Swift-BAT refined analysis
  41. GRB 100513A: CrAO optical observations
  42. Konus-Wind observation of GRB 100528A
  43. Swift UVOT and UVOT-enhanced XRT position for GRB 100528A
  44. GRB 100528A: SuperAGILE Localization of a Long GRB
  45. GRB 100526A: Swift XRT refined analysis
  46. GRB 100526B: Swift XRT/UVOT observations
  47. GRB 100526A: Swift-BAT refined analysis
  48. GRB 100526A: Swift detection of a burst
  49. Konus-Wind observation of GRB 100522A
  50. GRB 100522A: Swift XRT refined analysis
  51. GRB 100522A: NIR observations from CAHA
  52. GRB 100522A: Swift detection of a burst
  53. GRB 100518A: Swift-XRT refined analysis
  54. Update to the configuration of the Fermi-LAT onboard GRB search
  55. GRB 100518A: Faulkes Telescope North Afterglow Candidate
  56. GRB 100518A: Swift target of opportunity observation of the INTEGRAL burst
  57. GRB 100518A: a long GRB detected with INTEGRAL
  58. Swift Trigger 422437 is probably not a GRB
  59. GRB 100513A: EVLA radio observation
  60. GRB 100514A: Swift XRT refined analysis
  61. GRB 100514A: MASTER-Net optical observations
  62. GRB 100514A: Swift detection of a burst
  63. GRB 100513A: Swift XRT refined analysis
  64. GRB 100513A: Swift detection of a burst
  65. GRB 100511A, RIMOTS optical upper limits
  66. GRB 100508A: Swift-XRT Refined analysis
  67. GRB 100508A: Swift-BAT refined analysis
  68. GRB 100508A: ROTSE-III Optical Limits
  69. GRB 100508A: Swift detection of a burst
  70. GRB 100504A: Fermi GBM observation
  71. GRB 100504A: GROND Upper limits
  72. GRB 100504A: SARA-South Upper Limit
  73. GRB 100504A: Swift detection of a burst
  74. INTEGRAL observations of Swift GRB trigger 421072
  75. GRB 100420A: Gemini discovery of infrared afterglow
  76. GRB 100420A: Terskol optical upper limit
  77. GRB 100418A: RTT150 optical observations
  78. Konus-Wind observation of GRB 100423A
  79. GRB 100418A: Terskol optical observations
  80. GRB 100425A: Swift XRT refined analysis
  81. GRB 100424A: Liverpool Telescope Upper Limits
  82. GRB 100425A: GROND afterglow observation
  83. GRB 100424A: D50 optical limits
  84. GRB 100424A: GROND Upper Limits
  85. GRB 100424A: Swift-XRT refined analysis
  86. GRB 100425A: Swift detection of a burst
  87. GRB 100424A, Swift-BAT refined analysis
  88. GRB 100420A: GRT Optical Observation
  89. GRB 100418A: ROVOR optical measurements at 35 hours
  90. Swift Trigger 420256: ROTSE-III Optical Limits
  91. Radio afterglow detection of GRB 100418A with the EVLA
  92. GRB 100418A: Continued PAIRITEL NIR Observations
  93. GRB 100418A: WSRT Radio Detection
  94. GRB 100418A: RTT150 optical observations
  95. GRB100420A: MITSuME optical upper limits
  96. GRB 100414A: CFHT optical observations
  97. GRB 100420A: SARA Upper Limits
  98. GRB 100418A: RTT150 observations during the optical afterglow maximum
  99. GRB 100418A: SMA submm detection
  100. GRB 100420A: ROTSE-III Optical Limits

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