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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"

14865 results found.

  1. GRB 150527A: RATIR Afterglow Detection
  2. GRB 150527A: Swift detection of a burst
  3. GRB 150523A: Swift/UVOT Detection
  4. GRB 150513A: request for X-ray follow up
  5. Konus-Wind observation of GRB 150523A
  6. GRB 150523A Swift-XRT afterglow detection
  7. GRB 150523A: Fermi-LAT detection
  8. GRB 150523A: Fermi GBM detection
  9. Swift trigger 641332 is probably not an astrophysical source
  10. GRB 150518A: MAXI-GSC further analysis
  11. GRB 150518A: 6.0 GHz VLA detection
  12. GRB 150518A: AMI 15 GHz detection of possible radio counterpart
  13. GRB 150518A: Xinglong2.16m optical afterglow detection
  14. GRB 150518A: Swift-XRT afterglow detection
  15. GRB 150518A: MAXI/GSC detection
  16. Konus-Wind observation of GRB 150514A
  17. GRB 150514A: GROND Bright Afterglow Confirmation
  18. GRB 150514A: Swift/UVOT Detection
  19. GRB 150514A: Fermi GBM Detection
  20. GRB 150514A: Swift-XRT afterglow detection
  21. GRB 150514A: Fermi-LAT detection
  22. GRB 150513A: Fermi GBM detection
  23. GRB 150513A: Fermi-LAT detection
  24. GRB 150512A: Fermi GBM detection
  25. GRB 150513A: Swift detection of a burst
  26. Konus-Wind observation of GRB 150510A
  27. GRB 150510A: Fermi GBM detection
  28. GRB 150510A: Fermi-LAT detection
  29. GRB 150424A: 9.8 GHz VLA detection
  30. GRB 150413A: AMI 15 GHz confirmation of radio counterpart
  31. Konus-Wind observation of GRB 150430A
  32. GRB 150430A: Fermi GBM Detection
  33. GRB 150430A: MAXI/GSC detection
  34. GRB 150430A: Swift detection of a burst
  35. GRB 150426A: Fermi GBM detection
  36. GRB 150428C/MAXI J0400+678: MAXI/GSC detection
  37. GRB 150428B: Swift detection of a burst
  38. GRB 150428A: Swift detection of a burst
  39. Trigger 639199: Swift detection of IGRJ16418-4532
  40. GRB 150424A: 10.4m GTC spectroscopy
  41. GRB 150424A: GROND detects strong fading
  42. GRB 150423A: VLT/X-shooter spectroscopy and tentative redshift
  43. GRB 150424B: Fermi GBM detection
  44. Konus-Wind observation of GRB 150424A
  45. GRB 150424A: Swift/UVOT Observations
  46. GRB 150424B: MAXI/GSC detection
  47. GRB 150424A: Keck detection of optical afterglow
  48. GRB 150424A: Swift detection of a short burst
  49. GRB 150423A: UKIRT NIR observations
  50. GRB 150423A: VLT detection
  51. GRB 150422A: Fermi GBM detection
  52. GRB 150423A: Swift detection of a short burst
  53. Swift trigger 638589 is probably not an astrophysical source
  54. GRB 150418A: MAXI/GSC detection
  55. GRB 150416A: Fermi GBM detection
  56. Swift Trigger 638217 is probably not an astrophysical source
  57. GRB 150416A: Fermi-LAT detection
  58. GRB 150413A: Refined redshift
  59. GRB 150413A: AMI 15 GHz detection of possible radio counterpart
  60. GRB 150413A: redshift determination with the 2.2m CAHA
  61. GRB 150413A: MAXI/GSC detection
  62. GRB 150413A: MASTER very bright unusual OT observations
  63. GRB 150413A: MASTER bright OT detection
  64. GRB 150413A: Swift detection of a burst
  65. Swift detection of SAX J1808.4-3658
  66. GRB 150407A: Swift detection of a possible burst
  67. GRB 150404A: Fermi GBM detection
  68. Konus-Wind observation of GRB 150403A
  69. GRB 150403A: Fermi GBM Detection
  70. GRB 150403A: Swift/UVOT Detection
  71. GRB 150403A: Fermi-LAT detection
  72. GRB 150403A: Swift detection of a burst with an optical counterpart
  73. Konus-Wind observation of GRB 150330A
  74. GRB 150330A: Fermi GBM detection
  75. GRB 150323B: Swift-XRT afterglow detection
  76. GRB 150323C: possible host galaxy detection
  77. GRB 150317A: likely host galaxy detection
  78. GRB 150323B: Khureltogot optical observations
  79. GRB150323C: Fermi GBM detection
  80. GRB 150323C: Nanshan optical afterglow detection
  81. GRB 150323C: Swift detection of a burst
  82. GRB150323A: Swift-UVOT detection of the afterglow
  83. GRB 150323A: Swift detection of a burst
  84. GRB 150318A: Swift detection of a burst
  85. GRB 150317A: Swift/UVOT Upper Limits
  86. GRB 150317A: RATIR Optical Afterglow Detection
  87. GRB 150317A: Swift detection of a burst
  88. GRB 150314A: Early RAPTOR Detection
  89. Konus-Wind observation of GRB 150314A
  90. GRB 150314A: Swift/UVOT Detection
  91. GRB 150314A: Fermi-LAT detection
  92. GRB 150314A: Swift detection of a bright burst
  93. GRB 150313A: MAXI/GSC detection
  94. GRB 150311A: MAXI/GSC possible afterglow detection
  95. GRB 150309A: Fermi GBM detection
  96. GRB 150309A: Swift detection of a burst
  97. GRB 150305A: a long GRB detected by INTEGRAL
  98. Further X-ray observations of Swift J0045.2+4151 (aka Sw J0045 aka GRB 150301C aka [PFH2005] 622)
  99. GRB 150302A: BOOTES-2/TELMA upper limit
  100. GRB 150301C: XRT detection of a potential counterpart of BAT trigger 633105

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