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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"

23685 results found.

  1. Konus-Wind observation of GRB 100707A
  2. IPN triangulation of GRB 100707A
  3. GRB 100628A: Keck/LRIS Spectroscopy of Host Galaxy Candidate
  4. GRB 100707A: Fermi GBM detection
  5. Konus-Wind observation of GRB 100701B
  6. IPN triangulation of GRB 100701B
  7. Konus-Wind observation of GRB 100704A
  8. GRB 100703A: a short GRB detected by INTEGRAL
  9. GRB 100704A: Fermi GBM observation
  10. GRB 100704A: Swift-BAT refined analysis
  11. GRB 100704A: Swift detection of a burst
  12. GRB 100702A, Swift-BAT refined analysis
  13. GRB 100702A: Swift XRT refined analysis
  14. Swift/UVOT observations of GRB100702A - correction
  15. Swift/UVOT observations of GRB100702A
  16. GRB 100702A: Second epoch of Magellan near-IR observations and afterglow limits
  17. GRB 100701B: Fermi GBM detection
  18. GRB 100702A: Magellan near-IR observations
  19. GRB 100702: ROTSE-III Optical Limits
  20. GRB 100702A: Swift detection of a short burst
  21. GRB 100615A: Chandra X-ray ToO Observation
  22. XRF 100701A : MAXI/GSC detection of a probable XRF
  23. GRB 100628A: Second epoch of Magellan near-IR observations
  24. GRB 100628A: GROND optical/NIR observations of the host candidate
  25. GRB100625A: GROND confirmation of constant source
  26. GRB 100628A: Magellan near-IR observations
  27. GRB100628A: RTT150 optical observations
  28. GRB 100628A: INTEGRAL SPI-ACS light curve
  29. GRB 100625A: Magellan near-IR Observations
  30. GRB 100628A: Swift-BAT refined analysis
  31. GRB 100628A: Swift detection of a short hard burst
  32. Swift-BAT trigger 426048 is not a burst
  33. GRB 100625A: Swift-BAT refined analysis
  34. Konus-Wind observation of GRB 100625A
  35. GRB 100625A : IRSF/SIRIUS NIR upper limit
  36. GRB 100625A: Swift detection of a short hard burst
  37. Konus-Wind observation of GRB 100621A
  38. GRB 100621A: IRSF/SIRIUS NIR Observation
  39. GRB 100621A MOA-II optical limit
  40. GRB 100621A: VLT/X-shooter redshift
  41. GRB 100621A: Swift-BAT refined analysis
  42. GRB 100621A: GROND observation of bright NIR afterglow
  43. GRB 100621A: Swift detection of a burst
  44. GRB 100606A: Optical Limits
  45. GRB 100619A: Swift-BAT refined analysis
  46. GRB 100619A: Swift detection of a burst
  47. GRB 100614A: Gemini/NIRI Observations
  48. GRB 100615A: Gemini/NIRI Observations
  49. XRF 100616a : MAXI/GSC detection of a probable XRF
  50. Fermi GBM trigger 100612038 is not a GRB
  51. GRB 100614A: MASTER-Net optical alert observations
  52. GRB 100614A: Swift-BAT refined analysis
  53. GRB 100615A: Fermi GBM detection
  54. GRB 100615A: Swift-BAT refined analysis
  55. GRB 100615A: GROND observations, upper limits
  56. GRB 100615A: NTT/Ultracam imaging
  57. GRB 100615A: Swift detection of a burst
  58. GRB 100614A: BOOTES-2/TELMA optical observations
  59. GRB 100614A: Liverpool Telescope Observations
  60. GRB 100614A: Swift detection of a burst
  61. GRB 100606A: Suzaku WAM observation of the prompt emission
  62. GRB 100606A: GROND observations
  63. Trigger 424161: Swift/BAT trigger on XTE J1946+274/GRO J1944+26
  64. Konus-Wind observation of GRB 100606A
  65. GRB 100606A: Swift-BAT refined analysis
  66. Swift Trigger 424040 is not a GRB
  67. GRB 100606A: Swift detection of a burst
  68. Swift detection of outburst from the SFXT IGR J18410-0535
  69. GRB 100111A: Maidanak optical observations
  70. GRB 100418A: Maidanak optical observations
  71. Konus-Wind observation of GRB 100528A
  72. GRB 100528A: Faulkes Telescope North Detection
  73. GRB 100528A: GROND detection in all bands
  74. GRB 100528A: NOT optical observation
  75. Swift UVOT and UVOT-enhanced XRT position for GRB 100528A
  76. GRB100526B: GROND Upper limits
  77. GRB 100528A: SuperAGILE Localization of a Long GRB
  78. GRB 100526B: Swift-XRT confirmation of fading afterglow
  79. GRB 100526B: Swift-BAT refined analysis
  80. GRB 100526B: Swift XRT/UVOT observations
  81. GRB 100526A: Swift-BAT refined analysis
  82. GRB 100526B: Swift detection of a probable GRB
  83. GRB 100526A: MASTER-Net optical alert observations
  84. GRB 100526A: Swift detection of a burst
  85. Konus-Wind observation of GRB 100522A
  86. GRB100522A: Suzaku WAM observation of the prompt emission
  87. Swift/UVOT observations of GRB100522A.
  88. GRB 100522A, Swift-BAT refined analysis
  89. GRB 100522A: Enhanced Swift-XRT position
  90. GRB 100522A: NIR observations from CAHA
  91. GRB 100522A: BOOTES-2 optical limit
  92. GRB 100522A: Swift detection of a burst
  93. GRB 100518A: GROND afterglow observation and photo-z
  94. GRB 100518A: Swift/UVOT Upper Limits
  95. GRB 100518A: Swift-XRT refined analysis
  96. GRB 100518A: optical afterglow decay
  97. GRB 100518A: BOOTES-3 optical observations
  98. GRB 100518A: Faulkes Telescope North Afterglow Candidate
  99. GRB 100518A: Swift target of opportunity observation of the INTEGRAL burst
  100. GRB 100518A: a long GRB detected with INTEGRAL

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