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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"

12181 results found.

  1. Konus-Wind observation of GRB 150428A
  2. GRB 150430A: GROND Upper Limits
  3. Konus-Wind observation of GRB 150430A
  4. GRB 150430A: Swift-XRT refined Analysis
  5. GRB 150430A: MAXI/GSC detection
  6. GRB 150413A: CrAO optical observations
  7. GRB 150428A: MASTER-net early optical observation
  8. GRB 150428A: Swift-XRT refined Analysis
  9. GRB 150428B: Swift-BAT refined analysis
  10. GRB 150428C/MAXI J0400+678: MAXI/GSC detection
  11. GRB 150428A: Swift detection of a burst
  12. GRB 150424A: Swift-XRT refined Analysis
  13. GRB 150424A: NOT optical observations
  14. Konus-Wind observation of GRB 150424A
  15. GRB 150424B: MAXI/GSC detection
  16. GRB 150424A: Keck detection of optical afterglow
  17. GRB 150424A: Swift detection of a short burst
  18. GRB 150423A: Swift-XRT refined Analysis
  19. GRB 150413A: Konus-Wind and Swift/BAT joint spectral analysis
  20. GRB 150423A: KAIT Optical Upper Limit
  21. GRB 150423A: Swift detection of a short burst
  22. Konus-Wind observation of GRB 150418A
  23. Swift trigger 638589 is probably not an astrophysical source
  24. GRB 150418A: Swift-XRT observations
  25. GRB 150413A: RTT150 optical observations
  26. GRB 150418A: MAXI/GSC detection
  27. GRB 150413A: SAO RAS observations
  28. GRB 150416A: Fermi-LAT detection
  29. GRB 150413A
  30. Konus-Wind observation of a bright burst from SGR 1935+2154
  31. GRB 150413A: T7 and T18 optical observations
  32. IPN Triangulation of a bright burst from SGR 1935+2154
  33. GRB 150413A: redshift determination with the 2.2m CAHA
  34. GRB 150413A: Khureltogot optical observations
  35. GRB 150413A: MAXI/GSC detection
  36. Swift detection of SAX J1808.4-3658
  37. Konus-Wind observation of GRB 150403A
  38. Fermi trigger 449861706: MASTER-SAAO possible candidate to OT of Short GRB
  39. GRB 150403A: Swift/UVOT Detection
  40. GRB 150323C: CrAO optical observations
  41. GRB 150323C: Khureltogot optical observations
  42. GRB 150403A: Swift-XRT refined Analysis
  43. GRB 150403A: Fermi-LAT detection
  44. GRB 150403A: Swift detection of a burst with an optical counterpart
  45. Konus-Wind observation of GRB 150330A
  46. IPN Triangulation of GRB 150330A (long/very intense)
  47. GRB 150323C: possible host galaxy detection
  48. GRB 141220A: GMG observation limit
  49. Konus-Wind observation of GRB 150323B
  50. Konus-Wind observation of GRB 150323A
  51. GRB 150323C, Swift-BAT refined analysis
  52. GRB 150323C: Swift-XRT refined Analysis
  53. GRB 150323A: KAIT Optical Observations
  54. GRB 150323A: Swift-XRT refined Analysis
  55. GRB 150323A: Swift detection of a burst
  56. GRB 150318A: Swift-XRT refined Analysis
  57. GRB 150317A: Swift-XRT refined Analysis
  58. GRB 150220A, the review of the sky area in plate archives
  59. Konus-Wind observation of GRB 150314A
  60. GRB 150314A: Swift-XRT refined Analysis
  61. GRB 150314A: KAIT Optical Observations
  62. GRB 150314A: NOT optical observations
  63. GRB 150314A: Fermi-LAT detection
  64. GRB 150313A: MAXI/GSC detection
  65. GRB 150311A: MAXI/GSC possible afterglow detection
  66. Konus-Wind observation of GRB 150309A
  67. GRB 150309A: CrAO optic upper limit
  68. GRB 150309A: MASTER prompt optical observation
  69. GRB 150309A: Swift-XRT refined Analysis
  70. GRB 150309A: BOOTES-1 and -2 upper limit
  71. GRB 150309A: Swift detection of a burst
  72. GRB 150305A: a long GRB detected by INTEGRAL
  73. Swift J0045.2+4151: analysis of XMM-Newton archival data
  74. GRB 150302A, Swift-BAT refined analysis
  75. GRB 150301C: XRT detection of a potential counterpart of BAT trigger 633105
  76. GRB 150302A: Swift-XRT refined Analysis
  77. GRB 150301B: Swift-XRT refined Analysis
  78. GRB 150301B: LCOGT-Sutherland observations
  79. GRB 150302A: KAIT Optical Upper Limit
  80. GRB 150301A: Swift-BAT refined analysis
  81. GRB 150301B: Swift detection of a burst with an optical afterglow
  82. Trigger 633105 is likely not a GRB
  83. GRB 150301A: Fermi GBM observation
  84. GRB 150301A: Swift detection of a short burst or new SGR
  85. Trigger 632888: Swift detection of the magnetar 4U 0142+61
  86. Konus-Wind observation of GRB 150220A
  87. GRB 150222A: Swift-XRT refined Analysis
  88. GRB 150222B: MAXI/GSC detection
  89. Fermi GBM Observations of SGR 1935+2154
  90. GRB 150222A: TNG optical observations
  91. Fermi GBM trigger 150223068 is not a GRB
  92. SGR 1935+2154: Swift-BAT refined analysis
  93. GRB 150222A: Swift detection of a burst
  94. Swift detection of an outburst from SGR 1935+2154
  95. GRB 150213B, the review of the sky area in plate archives
  96. GRB 150219A: A long GRB detected by INTEGRAL
  97. GRB 150213B: Swift-XRT refined Analysis
  98. GRB 150212A: Swift-XRT refined Analysis
  99. GRB 150212A: Swift-XRT afterglow detection
  100. Konus-Wind observation of GRB 150211A

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