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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"

12182 results found.

  1. GRB 150424A: 9.8 GHz VLA detection
  2. Konus-Wind observation of GRB 150428A
  3. GRB 150430A: GROND Upper Limits
  4. Konus-Wind observation of GRB 150430A
  5. GRB 150430A: Swift-XRT refined Analysis
  6. GRB 150430A: MAXI/GSC detection
  7. GRB 150413A: CrAO optical observations
  8. GRB 150428A: MASTER-net early optical observation
  9. GRB 150428A: Swift-XRT refined Analysis
  10. GRB 150428B: Swift-BAT refined analysis
  11. GRB 150428C/MAXI J0400+678: MAXI/GSC detection
  12. GRB 150428A: Swift detection of a burst
  13. GRB 150424A: Swift-XRT refined Analysis
  14. GRB 150424A: NOT optical observations
  15. Konus-Wind observation of GRB 150424A
  16. GRB 150424B: MAXI/GSC detection
  17. GRB 150424A: Keck detection of optical afterglow
  18. GRB 150424A: Swift detection of a short burst
  19. GRB 150423A: Swift-XRT refined Analysis
  20. GRB 150413A: Konus-Wind and Swift/BAT joint spectral analysis
  21. GRB 150423A: KAIT Optical Upper Limit
  22. GRB 150423A: Swift detection of a short burst
  23. Konus-Wind observation of GRB 150418A
  24. Swift trigger 638589 is probably not an astrophysical source
  25. GRB 150418A: Swift-XRT observations
  26. GRB 150413A: RTT150 optical observations
  27. GRB 150418A: MAXI/GSC detection
  28. GRB 150413A: SAO RAS observations
  29. GRB 150416A: Fermi-LAT detection
  30. GRB 150413A
  31. Konus-Wind observation of a bright burst from SGR 1935+2154
  32. GRB 150413A: T7 and T18 optical observations
  33. IPN Triangulation of a bright burst from SGR 1935+2154
  34. GRB 150413A: redshift determination with the 2.2m CAHA
  35. GRB 150413A: Khureltogot optical observations
  36. GRB 150413A: MAXI/GSC detection
  37. Swift detection of SAX J1808.4-3658
  38. Konus-Wind observation of GRB 150403A
  39. Fermi trigger 449861706: MASTER-SAAO possible candidate to OT of Short GRB
  40. GRB 150403A: Swift/UVOT Detection
  41. GRB 150323C: CrAO optical observations
  42. GRB 150323C: Khureltogot optical observations
  43. GRB 150403A: Swift-XRT refined Analysis
  44. GRB 150403A: Fermi-LAT detection
  45. GRB 150403A: Swift detection of a burst with an optical counterpart
  46. Konus-Wind observation of GRB 150330A
  47. IPN Triangulation of GRB 150330A (long/very intense)
  48. GRB 150323C: possible host galaxy detection
  49. GRB 141220A: GMG observation limit
  50. Konus-Wind observation of GRB 150323B
  51. Konus-Wind observation of GRB 150323A
  52. GRB 150323C, Swift-BAT refined analysis
  53. GRB 150323C: Swift-XRT refined Analysis
  54. GRB 150323A: KAIT Optical Observations
  55. GRB 150323A: Swift-XRT refined Analysis
  56. GRB 150323A: Swift detection of a burst
  57. GRB 150318A: Swift-XRT refined Analysis
  58. GRB 150317A: Swift-XRT refined Analysis
  59. GRB 150220A, the review of the sky area in plate archives
  60. Konus-Wind observation of GRB 150314A
  61. GRB 150314A: Swift-XRT refined Analysis
  62. GRB 150314A: KAIT Optical Observations
  63. GRB 150314A: NOT optical observations
  64. GRB 150314A: Fermi-LAT detection
  65. GRB 150313A: MAXI/GSC detection
  66. GRB 150311A: MAXI/GSC possible afterglow detection
  67. Konus-Wind observation of GRB 150309A
  68. GRB 150309A: CrAO optic upper limit
  69. GRB 150309A: MASTER prompt optical observation
  70. GRB 150309A: Swift-XRT refined Analysis
  71. GRB 150309A: BOOTES-1 and -2 upper limit
  72. GRB 150309A: Swift detection of a burst
  73. GRB 150305A: a long GRB detected by INTEGRAL
  74. Swift J0045.2+4151: analysis of XMM-Newton archival data
  75. GRB 150302A, Swift-BAT refined analysis
  76. GRB 150301C: XRT detection of a potential counterpart of BAT trigger 633105
  77. GRB 150302A: Swift-XRT refined Analysis
  78. GRB 150301B: Swift-XRT refined Analysis
  79. GRB 150301B: LCOGT-Sutherland observations
  80. GRB 150302A: KAIT Optical Upper Limit
  81. GRB 150301A: Swift-BAT refined analysis
  82. GRB 150301B: Swift detection of a burst with an optical afterglow
  83. Trigger 633105 is likely not a GRB
  84. GRB 150301A: Fermi GBM observation
  85. GRB 150301A: Swift detection of a short burst or new SGR
  86. Trigger 632888: Swift detection of the magnetar 4U 0142+61
  87. Konus-Wind observation of GRB 150220A
  88. GRB 150222A: Swift-XRT refined Analysis
  89. GRB 150222B: MAXI/GSC detection
  90. Fermi GBM Observations of SGR 1935+2154
  91. GRB 150222A: TNG optical observations
  92. Fermi GBM trigger 150223068 is not a GRB
  93. SGR 1935+2154: Swift-BAT refined analysis
  94. GRB 150222A: Swift detection of a burst
  95. Swift detection of an outburst from SGR 1935+2154
  96. GRB 150213B, the review of the sky area in plate archives
  97. GRB 150219A: A long GRB detected by INTEGRAL
  98. GRB 150213B: Swift-XRT refined Analysis
  99. GRB 150212A: Swift-XRT refined Analysis
  100. GRB 150212A: Swift-XRT afterglow detection

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