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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"

24431 results found.

  1. GRB 100606A: Suzaku WAM observation of the prompt emission
  2. GRB 100606A: GROND observations
  3. Konus-Wind observation of GRB 100606A
  4. GRB 100606A: Swift-BAT refined analysis
  5. Konus-Wind observation of GRB 100528A
  6. GRB 100528A: GROND detection in all bands
  7. GRB100526B: GROND Upper limits
  8. GRB 100528A: Fermi GBM observation
  9. GRB 100528A: SuperAGILE Localization of a Long GRB
  10. GRB 100526B: Swift-BAT refined analysis
  11. GRB 100526B: Swift XRT/UVOT observations
  12. GRB 100526A: Swift-BAT refined analysis
  13. GRB 100526B: Swift detection of a probable GRB
  14. Konus-Wind observation of GRB 100522A
  15. GRB100522A: Suzaku WAM observation of the prompt emission
  16. GRB 100418A: Subaru late-time optical imaging and spectroscopy
  17. GRB 100522A: Fermi GBM observation
  18. GRB 100522A, Swift-BAT refined analysis
  19. GRB 100522A: NIR observations from CAHA
  20. GRB 100522A: BOOTES-2 optical limit
  21. GRB 100518A: GROND afterglow observation and photo-z
  22. GRB 100518A: optical afterglow decay
  23. Update to the configuration of the Fermi-LAT onboard GRB search
  24. GRB 100518A: Swift target of opportunity observation of the INTEGRAL burst
  25. GRB 100518A: a long GRB detected with INTEGRAL
  26. Swift Trigger 422437 is probably not a GRB
  27. Fermi/GBM trigger 295791986 - unreliable location
  28. GRB 100517A: MASTER-Net wide field camera prompt optical observations
  29. GRB 100514A: MASTER-Net optical observations
  30. GRB 100514A: Swift-BAT refined analysis
  31. GRB 100514A: Faulkes Telescope South observations
  32. GRB 100513A: Faulkes Telescope South observations
  33. GRB 100513A, RIMOTS optical upper limits
  34. GRB 100513A: Swift-BAT refined analysis
  35. GRB 100513A: PAIRITEL NIR afterglow candidate
  36. GRB 100513A: Swift detection of a burst
  37. GRB 100510A: Fermi GBM detection/observation
  38. GRB 100511A: Fermi GBM detection/observation
  39. GRB100504A: Optical upper limits at IAO
  40. GRB 100511A, RIMOTS optical upper limits
  41. Trigger 421695: Swift detection of a possible burst
  42. GRB100508A: Further Swift/UVOT Observations
  43. GRB100503A: Suzaku WAM observation of the prompt emission
  44. GRB 100508A: Swift-BAT refined analysis
  45. GRB 100508A: ROTSE-III Optical Limits
  46. Swift-BAT refined analysis of trigger 421262
  47. GRB 100504A: Fermi GBM observation
  48. An SGR-like burst from the magnetar 1E 1841-04.5 in Kes 73
  49. GRB 100418A: Flattening of the Swift/UVOT Optical Light Curve
  50. GRB 100504A: Swift-XRT refined analysis
  51. GRB 100504A: Swift-BAT refined analysis
  52. GRB 100503A: Fermi GBM detection
  53. GRB 100504A: Swift detection of a burst
  54. INTEGRAL observations of Swift GRB trigger 421072
  55. GRB100423A : Suzaku WAM observation of the prompt emission
  56. Trigger 421072: Possible Swift detection of a GRB or transient
  57. GRB 100420A: EVLA radio observations
  58. GRB 100423A: xinglong TNT optical upper limit
  59. GRB 100427A: Fermi GBM detection
  60. GRB 100424a. Radio observations
  61. Konus-Wind observation of GRB 100423A
  62. GRB 100424A: CrAO optical observations
  63. GRB 100424A: Gemini/NIRI H-band observations
  64. GRB 100424A: Liverpool Telescope Upper Limits
  65. GRB 100425A: Swift-BAT refined analysis
  66. GRB 100425A: GROND afterglow observation
  67. GRB 100424A: D50 optical limits
  68. GRB100424A: MITSuME optical upper limits
  69. GRB100423A: MITSuME optical upper limits
  70. GRB 100424A : Lulin early z'-band upper limit
  71. GRB 100424A: GROND Upper Limits
  72. GRB 100424A: PAIRITEL NIR Upper Limits
  73. GRB 100424A: WHT z-band observations
  74. GRB 100424A, Swift-BAT refined analysis
  75. Swift Trigger 420256: D50 optical limits
  76. GRB 100420A: Swift-BAT refined analysis
  77. GRB 100423B: Fermi GBM detection
  78. GRB 100423A: Swift-BAT refined analysis
  79. Swift Trigger 420256: IAC80 R-band observations
  80. Swift Trigger 420256: BOOTES-2 observations
  81. Swift Trigger 420256: ROTSE-III Optical Limits
  82. GRB 100423A: Skynet/PROMPT Detections
  83. GRB 100418A: Continued PAIRITEL NIR Observations
  84. GRB100418A: REM possible afterglow detection
  85. GRB100420A: MITSuME optical upper limits
  86. GRB 100418A: RTT150 observations during the optical afterglow maximum
  87. GRB 100418A: MASTER-Net optical observations
  88. GRB 100420A: ROTSE-III Optical Limits
  89. GRB 100418A PAIRITEL NIR Observations
  90. GRB 100418A: ROVOR optical afterglow detection
  91. GRB 100418A: Swift-BAT refined analysis
  92. GRB 100418A: ROTSE-III Optical Limits
  93. GRB 100413A: Radio Afterglow Detection with the EVLA
  94. GRB 100414A: Suzaku WAM observation of the prompt emission
  95. GRB 100413A: Suzaku WAM observation of the prompt emission
  96. GRB 100414A: Palomar Transient Factory Observations
  97. GRB 100413B: Swift Confirmation of Burst
  98. GRB 100413A: Swift-BAT final refined analysis
  99. GRB 100414A: IPN Localization
  100. Konus-Wind observation of GRB 100414B

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