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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"

3119 results found.

  1. GRB 160409A found in Swift BAT ground analysis
  2. IPN Triangulation of GRB 160406A (short/hard)
  3. LIGO/Virgo G211117: LOFAR follow-up
  4. GRB 160303A SMA observation
  5. GRB 160227A: McDonald 0.8m Detection
  6. GRB 160227A: MAXI/GSC detection
  7. GRB 160225A: TSHAO optical upper limit
  8. Konus-Wind observation of GRB 160220B
  9. GRB 160220A: MASTER-Amur observations
  10. LIGO/Virgo G211117: LOFAR follow-up
  11. GRB 160206A: MAXI/GSC detection
  12. GRB 160203A: Enhanced Swift-XRT position
  13. GRB 160203A: GROND Afterglow Candidate
  14. GRB 160203A: Swift detection of a burst
  15. GRB 160123A: Swift-BAT refined analysis
  16. IPN Triangulation of GRB 151231A
  17. LIGO/Virgo G211117: Subaru Hyper Suprime-Cam follow-up observation
  18. GRB 160107A: MAXI/GSC detection
  19. IPN Triangulation of GRB 151225A (short/hard)
  20. LIGO/Virgo G211117: Summary of Pan-STARRS transients
  21. GRB 160104B: MAXI/GSC detection
  22. LIGO/Virgo G211117: LOFAR follow-up
  23. LIGO/Virgo G211117: 44 transients from Pan-STARRS data during 2015-12-28/30
  24. LIGO/Virgo G211117: OAO-WFC NIR follow-up observations
  25. IPN Triangulation of GRB 151227B
  26. V404Cyg Swift Trigger 668097: CrAO RT-22 radio observations
  27. LIGO/Virgo G211117: Optical Observations with Kiso Schmidt telescope and KWFC
  28. LIGO/Virgo G211117: iPTF Optical Transient Candidates
  29. GRB 151228B: Fermi GBM observation
  30. LIGO/Virgo G211117: Optical NIR observation with Kanata telescope
  31. LIGO/Virgo G211117: Optical follow-up with Kanata telescope
  32. GRB 151228B: Swift detection of a burst with an optical detection
  33. GRB 151215A: TSHAO optical observations
  34. Swift detection of 4U 1850-03
  35. GRB 130831A: MASTER early OT detection and LC
  36. GRB 151205B: MASTER-NET early optical observations
  37. GRB 151205A: Swift detection of a burst
  38. GRB 151127A iTelescope observation
  39. GRB GRB 151118A: MASTER-NET optical observations
  40. GRB 151111A: GROND marginal detection of a afterglow candidate
  41. GRB 151111A: LCOGT-FTS afterglow observations
  42. GRB 151027A: Mondy optical observations
  43. GRB 150910A: CrAO optical observations
  44. LIGO/Virgo G194575: transients from Pan-STARRS in the RA=1hr localisation region
  45. GRB 151022A: MASTER-Ural observations
  46. GRB 151006A: Mondy optical upper limit
  47. Swift Trigger 658045 is not a GRB
  48. LIGO/Virgo G184098: Further VST-ESO PARANAL observations
  49. LIGO/Virgo G184098: VST-ESO PARANAL observations
  50. LIGO/Virgo G184098: Swift follow-up observations
  51. GRB 150907A: Swift-XRT afterglow detection
  52. GRB 150907B: Swift-BAT refined analysis
  53. GRB 150907B: Enhanced Swift-XRT position
  54. GRB 150907B: GROND Upper Limits
  55. GRB 150907B: Swift-XRT observations
  56. GRB 150907A: Swift-XRT observations
  57. GRB 150907A: MAXI/GSC detection
  58. ANTARES neutrino Alert150901.32 alert and Swift XRT counterpart: MASTER optical observations and new possible candidate
  59. GRB 150902A: MASTER-SAAO optical observations
  60. Konus-Wind observation of GRB 150902A
  61. GRB 150831B: MASTER-IAC early optical observations
  62. IPN Triangulation of GRB 150824A
  63. Konus-Wind observation of GRB 150818A
  64. GRB 150821A: Swift detection of a burst with an optical afterglow
  65. GRB 150819A: Swift-BAT refined analysis
  66. GRB 150819A: Swift detection of a burst
  67. Fermi GBM trigger 150806450 is not a GRB
  68. GRB 150801B: Enhanced Swift-XRT position
  69. Trigger 649113: Swift detection of SGR 1E 1841-045
  70. Fermi Gamma-ray Burst Monitor triggers that are not GRBs
  71. GRB 150710B refined analysis
  72. GRB 150710B detected in ground analysis of BAT data
  73. GRB 150626B, Swift-BAT refined analysis
  74. V404 Cyg: MASTER Swift, Integral alert observations
  75. GRB 150622A: MAXI/GSC detection
  76. GRB 150527A: Swift-XRT refined Analysis
  77. GRB 150527A: Fermi GBM observation
  78. GRB 150518A: Mondy optical observations
  79. GRB 150430A: MAXI/GSC detection
  80. GRB 150413A: CrAO optical observations
  81. GRB 150424B: MAXI/GSC detection
  82. GRB 150424A: Swift detection of a short burst
  83. IPN Triangulation of GRB 150330A (long/very intense)
  84. GRB 150323A: AAO optical observations
  85. GRB 150309A: CrAO optic upper limit
  86. GRB 150301A: Fermi GBM observation
  87. Swift-BAT refined analysis of magnetar 4U 0142+61 (Trigger 632888)
  88. Fermi GBM Observations of Magnetar 4U 0142+61
  89. Trigger 632888: Swift detection of the magnetar 4U 0142+61
  90. Trigger 631747: Swift detection of 4U 0614+09
  91. GRB 150212A: Swift-XRT refined Analysis
  92. GRB 150212A: MASTER optical observations
  93. GRB150212A: P60 Afterglow Candidate
  94. GRB 150210A: MASTER SN detection during LAT error box inspection
  95. GRB 150204A: GROND observations
  96. GRB 150203A iTelescope observation
  97. GRB 150204A: LCOGT-Sutherland and Siding Springs observations
  98. GRB 150202B: Swift XRT/UVOT observations
  99. GRB 150201A: GROND upper limits
  100. Konus-Wind observation of GRB 150127B

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