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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"

45799 results found.

  1. GRB 140219A: MAXI/GSC detection
  2. GRB 140219A: the confirmation of the brightening SDSS J102406.41+062937.6 star
  3. GRB 140219A: Retraction of X-ray afterglow
  4. GRB 140219A: MASTER optical brightening inside XRT-5 error box detection
  5. GRB 140219A: iPTF optical observations
  6. GRB 140102A: TAOS early optical afterglow detection
  7. GRB 140219A: optical observations of XRT source #5
  8. GRB 140219A: XRT afterglow candidate
  9. GRB 140221A: Results from Swift XRT tiled observations
  10. GRB 140219A: Xuyi and Nanshan upper limits
  11. GRB 140219A: results from Swift XRT and UVOT tiled observations
  12. GRB 140219A: MASTER before and after GRB observational arguments of the exceptionally Dark GRB
  13. Konus-Wind observation of exceptionally bright GRB 140219A
  14. GRB 140221A Tiled Swift observations
  15. GRB 140221A: MAXI/GSC detection
  16. GRB 140219A: Fermi-LAT detection of a burst
  17. GRB 140219A: Fermi GBM Detection
  18. GRB 140219A Tiled Swift observations
  19. IPN Triangulation of extremely bright long GRB 140219A
  20. Swift follow-up of an Integral weak transient
  21. GRB 140213A: Continued Skynet R-COP/PROMPT Observations of the Optical Afterglow
  22. GRB 140215A: RAPTOR Observations During Gamma-Ray Emitting Interval
  23. Fermi GBM trigger 140214230 is not a GRB
  24. GRB 140213A: Continued Skynet R-COP/PROMPT Detections of a Rebrightening Optical Afterglow
  25. GRB 140215A: Continued Skynet PROMPT Observations of the Optical Afterglow
  26. GRB 140215A: WSRT radio observation
  27. GRB 140211A: Khureltogot optical upper limits
  28. GRB 140215A: Continued RATIR Optical and NIR Observations
  29. Konus-Wind observation of GRB 140213A
  30. Konus-Wind observation of GRB 140215A
  31. GRB 140215A: Swift/UVOT Detection
  32. GRB 140211A: Swift-XRT and UVOT observations
  33. GRB140215A: Continued Discovery Channel Telescope Observations
  34. GRB 140215A: Continued RATIR Optical and NIR Observations
  35. GRB 140215A: MITSuME Okayama Optical Observation
  36. GRB 140215A: Swift-BAT refined analysis
  37. GRB 140215A: ISON-NM optical observations
  38. GRB 140215A: Swift-XRT refined Analysis
  39. GRB 140215A: P60 observations
  40. GRB 140215A: Enhanced Swift-XRT position
  41. GRB 140215A: RATIR Optical and NIR Observations
  42. GRB140215A: Skynet PROMPT Optical Observations
  43. GRB 140215A: KAIT Optical Detection
  44. GRB140215A: Prompt Observations with Discovery Channel Telescope
  45. GRB 140215A: Swift detection of a burst with optical counterpart
  46. GRB 140213A: Swift-BAT refined analysis
  47. GRB140206A: Discovery Channel Telescope Optical Detection
  48. GRB 140213A: Swift/UVOT Observations
  49. GRB 140213A: Fermi GBM Detection
  50. GRB 140213A: Swift-XRT refined Analysis
  51. GRB140213A: VLT/X-shooter redshift
  52. GRB 140213A: Enhanced Swift-XRT position
  53. GRB 140213A: GROND Detection of the Optical/NIR Afterglow
  54. GRB 140213A: Skynet R-COP Detection of Optical Afterglow
  55. GRB 140213A: Swift-XRT observations
  56. GRB 140213A: Swift/UVOT Detection
  57. GRB 140213A: Swift detection of a burst
  58. GRB140211A : Xinglong TNT upper limit
  59. Trigger 586482: Swift detection of GROJ1744-28
  60. Correction to GCN 18521 "GRB140209A: Swift/UVOT observations"
  61. GRB140209A: Swift/UVOT observations.
  62. GRB 140211A: Swift-BAT refined analysis
  63. GRB 140209A: Swift-XRT observations
  64. Konus-Wind observation of GRB 140209A
  65. GRB 140211A: MITSuME Okayama upper limits
  66. GRB 140211A: Swift detection of a burst
  67. GRB 140209A: Early RAPTOR Optical Detection
  68. GRB 140209A: Swift-BAT Spectral lag analysis
  69. GRB 140206A: Bassano Bresciano Observatory optical upper limit
  70. GRB 140209A, Swift-BAT refined analysis
  71. GRB 140209A: Fermi GBM observation
  72. GRB 140209A: optical observations
  73. GRB 140209A: P60 optical afterglow detection
  74. GRB 140209A: Swift detection of a burst
  75. GRB 140206A: Mondy optical observations
  76. GRB 140206A: Liverpool Telescope optical afterglow observations
  77. GRB 140206A, Swift-BAT refined analysis
  78. Konus-Wind observation of GRB 140206B
  79. GRB 140206A: MITSuME Akeno detection of the optical counterpart
  80. GRB 140206A: TNG redshift confirmation
  81. GRB 140206A: Optical Observations via Virtual Telescope
  82. GRB 140206A: NOT redshift
  83. GRB 140206A: TNG optical observations
  84. GRB 140206A: Swift-XRT refined Analysis
  85. GRB 140206A: T100 observations
  86. GRB 140206A: Fermi GBM detection
  87. GRB 140206A: Swift/UVOT Detection
  88. GRB 140206A: theoretical prediction of redshift and of supernova occurrence
  89. GRB 140206A: Enhanced Swift-XRT position
  90. GRB 140206A: ISON-Ussuriysk optical observations
  91. GRB 140206B: Fermi-LAT detection
  92. GRB 140206B: Fermi GBM detection
  93. GRB 140206A: Nanshan optical observations
  94. GRB 140206A: MASTER OT detection
  95. GRB 140206A: Swift/UVOT optical detection
  96. GRB140206A - Optical afterglow candidate
  97. GRB140206A: a long GRB detected by INTEGRAL
  98. GRB 140206A: Swift detection of a burst
  99. GRB 140129A: 5 GHz VLA observations
  100. GRB 140129A: Continued RATIR Optical and NIR Observations

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