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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"

37682 results found.

  1. GRB 160804A: GROND observations
  2. GRB 160804A: VLT/X-shooter redshift
  3. GRB 160804A: SAO RAS optical observations
  4. GRB 160804A: TNG optical observations, afterglow fading and candidate host galaxy
  5. GRB 160804A: Fermi GBM observation
  6. GRB160804A: MASTER-SAAO observation
  7. Konus-Wind observation of GRB 160802A
  8. IPN Triangulation of GRB 160802A
  9. GRB 160804A: Swift-BAT refined analysis
  10. GRB 160804A: Swift/UVOT Detection
  11. GRB 160804A: Swift-XRT refined Analysis
  12. GRB 160804A: Enhanced Swift-XRT position
  13. GRB 160804A: Swift detection of a burst
  14. GRB 160802A: Lomonosov BDRG gamma ray detection
  15. GBM Observations of IceCube 160731
  16. GRB 160801A: TSHAO optical observations
  17. GRB 160801A: Swift/UVOT Upper Limits
  18. GRB 160801A: SAO RAS optical observations
  19. GRB 160802A: Fermi GBM detection
  20. GRB 160801A: NOT upper limits
  21. GRB 160726A: CALET Gamma-Ray Burst Monitor detection
  22. GRB 160801A: Swift-XRT refined Analysis
  23. GRB 160801A: Swift-BAT refined analysis
  24. GRB 160801A: Enhanced Swift-XRT position
  25. GRB 160801A: MITSuME Okayama upper limits
  26. GRB 160801A: Swift detection of a burst
  27. GRB 160716A: TAROT La Silla observatory optical observations
  28. GRB160720A: Astrosat CZTI detection
  29. GRB160709A: Astrosat CZTI detection of short GRB
  30. GRB160703A: Astrosat CZTI detection
  31. GRB 160705B: 15 GHz upper limits from AMI
  32. GRB 160703A: 15 GHz upper limits from AMI
  33. GBM observation of SGR-like burst from the direction of PSR 1119-6127
  34. GRB 160726A, Swift-BAT refined analysis
  35. Konus-Wind observation of short GRB 160726A
  36. GRB 160726A: Fermi GBM observation
  37. GRB 160726A: Swift detection of a short burst
  38. GRB 160721A: CALET Gamma-Ray Burst Monitor detection
  39. GRB 160720A CALET Gamma-Ray Burst Monitor detection
  40. GRB 160720A: Lomonosov BDRG gamma ray detection and MASTER limit
  41. Konus-Wind observation of GRB 160720A
  42. IPN Triangulation of GRB 160720A
  43. GRB 160703, GRB 160705, GRB 160720, SGR1935+2154: First SGRs and GRBs detected by Lomonosov.
  44. GRB 160720A: Fermi GBM detection
  45. Fermi GBM trigger 490701713/160720418 is not a GRB
  46. Fermi GBM trigger 490365157/160716523 is not a GRB
  47. GRB 160716A: Swift/UVOT Detection
  48. GRB 160714A: Swift/UVOT Upper Limits
  49. GRB 160716A: Swift-BAT refined analysis
  50. GRB 160716A: Swift-XRT refined Analysis
  51. GRB 160716A: Enhanced Swift-XRT position
  52. GRB 160716A: Swift detection of a burst
  53. Swift Trigger 704327: KAIT Optical Observations
  54. GRB 160712A: Swift-BAT refined analysis
  55. GRB 160714A: TAROT Calern observatory optical observations
  56. GRB 160714A: Swift-XRT observations
  57. GRB 160623A: afterglow spectroscopy by GTC and independent redshift determination
  58. GRB 160714A: Fermi GBM observation
  59. GRB 160623A: optical astrometry, photometry, and redshift
  60. Fermi GBM trigger 490193747/160714539 is not a GRB
  61. GRB 160714A: Swift-BAT refined analysis,
  62. Swift Trigger 704327: MASTER syncronous optical observations
  63. GRB 160714A: MASTER early optical observations
  64. GRB 160712A: Further GROND observations
  65. GRB 160709A CALET Gamma-Ray Burst Monitor detection
  66. Swift Trigger 704327: a possible GRB
  67. GRB 160714A: Optical observations from OSN
  68. GRB 160714A: Swift-XRT observations
  69. GRB 160714A: Swift detection of a short burst
  70. GRB 160712A: Swift/UVOT Upper Limits
  71. GRB 160712A: RATIR Optical and NIR Observations
  72. Konus-Wind observation of GRB 160712A
  73. GRB 160712A: GROND observations
  74. GRB 160712A: Swift-XRT refined Analysis
  75. GRB 160712A: Skynet R-COP observations
  76. GRB 160712A: Enhanced Swift-XRT position
  77. GRB 160629A: 15 GHz detections and upper limits from AMI
  78. GRB 160624A: 15 GHz upper limits from AMI
  79. GRB 160712A: Initial Swift/UVOT observations
  80. GRB 160712A: Swift-XRT observations
  81. GRB 160712A: Global MASTER-Net optical observation
  82. GRB 160712A: Swift detection of a burst
  83. GRB 160625B: Global MASTER-Crimea prompt optical emission detection (fwd)
  84. GRB 160709A: MASTER early imaging Swift BAT error box
  85. GRB 160709A, Swift-BAT detection and localization
  86. GRB 160625B: TSHAO optical observations
  87. GRB 160709A: Swift-XRT observations
  88. GRB 160709A: Global MASTER Net Fermi GBM Alerts observations
  89. Konus-Wind observation of GRB 160709A (short/hard)
  90. GRB 160709A: Fermi GBM Observations
  91. GRB 160709A: Fermi-LAT detection
  92. GRB 160709A: Tiled Swift observations
  93. Fermi GBM trigger 489771293/160709649 is not a GRB
  94. GRB 160705B: TAROT Calern observatory optical observations
  95. GRB 160628A CALET Gamma-Ray Burst Monitor detection
  96. GRB 160629A: Mondy optical observations
  97. GRB 160629A: AbAO optical observations
  98. GRB 160703A: Keck-I/LRIS Optical Observations
  99. Konus-Wind observation of GRB 160702A (short/hard)
  100. IPN Triangulation of GRB 160702A (short/hard)

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