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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"

24435 results found.

  1. GRB 100615A: Fermi GBM detection
  2. GRB 100615A: Swift-BAT refined analysis
  3. GRB 100615A: PAIRITEL NIR Upper Limits
  4. GRB 100614A: Liverpool Telescope Observations
  5. GRB 100606A: Suzaku WAM observation of the prompt emission
  6. GRB 100606A: GROND observations
  7. Konus-Wind observation of GRB 100606A
  8. GRB 100606A: Swift-BAT refined analysis
  9. Konus-Wind observation of GRB 100528A
  10. GRB 100528A: GROND detection in all bands
  11. GRB100526B: GROND Upper limits
  12. GRB 100528A: Fermi GBM observation
  13. GRB 100528A: SuperAGILE Localization of a Long GRB
  14. GRB 100526B: Swift-BAT refined analysis
  15. GRB 100526B: Swift XRT/UVOT observations
  16. GRB 100526A: Swift-BAT refined analysis
  17. GRB 100526B: Swift detection of a probable GRB
  18. Konus-Wind observation of GRB 100522A
  19. GRB100522A: Suzaku WAM observation of the prompt emission
  20. GRB 100418A: Subaru late-time optical imaging and spectroscopy
  21. GRB 100522A: Fermi GBM observation
  22. GRB 100522A, Swift-BAT refined analysis
  23. GRB 100522A: NIR observations from CAHA
  24. GRB 100522A: BOOTES-2 optical limit
  25. GRB 100518A: GROND afterglow observation and photo-z
  26. GRB 100518A: optical afterglow decay
  27. Update to the configuration of the Fermi-LAT onboard GRB search
  28. GRB 100518A: Swift target of opportunity observation of the INTEGRAL burst
  29. GRB 100518A: a long GRB detected with INTEGRAL
  30. Swift Trigger 422437 is probably not a GRB
  31. Fermi/GBM trigger 295791986 - unreliable location
  32. GRB 100517A: MASTER-Net wide field camera prompt optical observations
  33. GRB 100514A: MASTER-Net optical observations
  34. GRB 100514A: Swift-BAT refined analysis
  35. GRB 100514A: Faulkes Telescope South observations
  36. GRB 100513A: Faulkes Telescope South observations
  37. GRB 100513A, RIMOTS optical upper limits
  38. GRB 100513A: Swift-BAT refined analysis
  39. GRB 100513A: PAIRITEL NIR afterglow candidate
  40. GRB 100513A: Swift detection of a burst
  41. GRB 100510A: Fermi GBM detection/observation
  42. GRB 100511A: Fermi GBM detection/observation
  43. GRB100504A: Optical upper limits at IAO
  44. GRB 100511A, RIMOTS optical upper limits
  45. Trigger 421695: Swift detection of a possible burst
  46. GRB100508A: Further Swift/UVOT Observations
  47. GRB100503A: Suzaku WAM observation of the prompt emission
  48. GRB 100508A: Swift-BAT refined analysis
  49. GRB 100508A: ROTSE-III Optical Limits
  50. Swift-BAT refined analysis of trigger 421262
  51. GRB 100504A: Fermi GBM observation
  52. An SGR-like burst from the magnetar 1E 1841-04.5 in Kes 73
  53. GRB 100418A: Flattening of the Swift/UVOT Optical Light Curve
  54. GRB 100504A: Swift-XRT refined analysis
  55. GRB 100504A: Swift-BAT refined analysis
  56. GRB 100503A: Fermi GBM detection
  57. GRB 100504A: Swift detection of a burst
  58. INTEGRAL observations of Swift GRB trigger 421072
  59. GRB100423A : Suzaku WAM observation of the prompt emission
  60. Trigger 421072: Possible Swift detection of a GRB or transient
  61. GRB 100420A: EVLA radio observations
  62. GRB 100423A: xinglong TNT optical upper limit
  63. GRB 100427A: Fermi GBM detection
  64. GRB 100424a. Radio observations
  65. Konus-Wind observation of GRB 100423A
  66. GRB 100424A: CrAO optical observations
  67. GRB 100424A: Gemini/NIRI H-band observations
  68. GRB 100424A: Liverpool Telescope Upper Limits
  69. GRB 100425A: Swift-BAT refined analysis
  70. GRB 100425A: GROND afterglow observation
  71. GRB 100424A: D50 optical limits
  72. GRB100424A: MITSuME optical upper limits
  73. GRB100423A: MITSuME optical upper limits
  74. GRB 100424A : Lulin early z'-band upper limit
  75. GRB 100424A: GROND Upper Limits
  76. GRB 100424A: PAIRITEL NIR Upper Limits
  77. GRB 100424A: WHT z-band observations
  78. GRB 100424A, Swift-BAT refined analysis
  79. Swift Trigger 420256: D50 optical limits
  80. GRB 100420A: Swift-BAT refined analysis
  81. GRB 100423B: Fermi GBM detection
  82. GRB 100423A: Swift-BAT refined analysis
  83. Swift Trigger 420256: IAC80 R-band observations
  84. Swift Trigger 420256: BOOTES-2 observations
  85. Swift Trigger 420256: ROTSE-III Optical Limits
  86. GRB 100423A: Skynet/PROMPT Detections
  87. GRB 100418A: Continued PAIRITEL NIR Observations
  88. GRB100418A: REM possible afterglow detection
  89. GRB100420A: MITSuME optical upper limits
  90. GRB 100418A: RTT150 observations during the optical afterglow maximum
  91. GRB 100418A: MASTER-Net optical observations
  92. GRB 100420A: ROTSE-III Optical Limits
  93. GRB 100418A PAIRITEL NIR Observations
  94. GRB 100418A: ROVOR optical afterglow detection
  95. GRB 100418A: Swift-BAT refined analysis
  96. GRB 100418A: ROTSE-III Optical Limits
  97. GRB 100413A: Radio Afterglow Detection with the EVLA
  98. GRB 100414A: Suzaku WAM observation of the prompt emission
  99. GRB 100413A: Suzaku WAM observation of the prompt emission
  100. GRB 100414A: Palomar Transient Factory Observations

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