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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"

28296 results found.

  1. GRB 160703, GRB 160705, GRB 160720, SGR1935+2154: First SGRs and GRBs detected by Lomonosov.
  2. GRB 160720A: Fermi GBM detection
  3. GRB 160716A: Swift/UVOT Detection
  4. GRB 160714A: Swift/UVOT Upper Limits
  5. GRB 160716A: Swift-BAT refined analysis
  6. GRB 160716A: Swift-XRT refined Analysis
  7. GRB 160716A: Enhanced Swift-XRT position
  8. GRB 160716A: Swift detection of a burst
  9. Swift Trigger 704444 is probably not an astrophysical event.
  10. GRB 160712A: Swift-BAT refined analysis
  11. GRB 160714A: TAROT Calern observatory optical observations
  12. GRB 160714A: Swift-XRT observations
  13. GRB 160714A: Fermi GBM observation
  14. GRB 160623A: optical astrometry, photometry, and redshift
  15. Swift-BAT trigger 704327 was due to noise
  16. GRB 160714A: Swift-BAT refined analysis,
  17. Swift Trigger 704327: MASTER syncronous optical observations
  18. GRB 160712A: Further GROND observations
  19. Swift Trigger 704327: a possible GRB
  20. GRB 160714A: Optical observations from OSN
  21. GRB 160714A: Swift-XRT observations
  22. GRB 160712A: Swift/UVOT Upper Limits
  23. GRB 160712A: RATIR Optical and NIR Observations
  24. GRB 160712A: GROND observations
  25. GRB 160712A: Swift-XRT refined Analysis
  26. GRB 160712A: Skynet R-COP observations
  27. GRB 160712A: Enhanced Swift-XRT position
  28. GRB 160712A: Swift-XRT observations
  29. GRB 160709A, Swift-BAT detection and localization
  30. GRB 160625B: TSHAO optical observations
  31. GRB 160709A: Swift-XRT observations
  32. GRB 160709A: Global MASTER Net Fermi GBM Alerts observations
  33. GRB 160709A: Fermi GBM Observations
  34. GRB 160709A: Fermi-LAT detection
  35. GRB 160705B: TAROT Calern observatory optical observations
  36. GRB 160628A CALET Gamma-Ray Burst Monitor detection
  37. GRB 160629A: Mondy optical observations
  38. GRB 160629A: AbAO optical observations
  39. GRB 160703A: Keck-I/LRIS Optical Observations
  40. IPN Triangulation of GRB 160702A (short/hard)
  41. GRB 160705B: Swift/UVOT Upper Limits
  42. GRB 160705B: RATIR Optical and NIR Observations and Confirmation of the Fading Afterglow
  43. GRB 160705B: Swift-BAT refined analysis
  44. GRB 160705B: Swift-XRT refined Analysis
  45. GRB 160705B: Enhanced Swift-XRT position
  46. GRB 160705B: Swift detection of a burst
  47. GRB 160703A: Swift/UVOT Detection
  48. GRB 160703A: Swift-XRT afterglow detection
  49. GRB 160705A/MAXI J0748-149: MAXI/GSC detection
  50. GRB 160703A: MITSuME Ishigakijima Optical Observation
  51. GRB 160625B: RTT150 optical observations
  52. GRB 160703A: Bassano Bresciano Observatory upper limits
  53. GRB 160703A: Swift-BAT refined analysis
  54. GRB 160703A: Zadko observatory - Gingin optical observations
  55. GRB 160629A: AbAO optical observations
  56. Swift trigger #702630 is not an astrophysical event
  57. GRB 160629A: Swift/UVOT Upper Limits
  58. GRB 160625B: SAO RAS monitoring
  59. GRB 160629A: Swift-XRT afterglow detection
  60. GRB 160630A: Swift-BAT refined analysis
  61. GRB 160629A: Global MASTER Net Prompt OT observations
  62. GRB 160630A: Skynet PROMPT-CTIO observations of the optical afterglow
  63. GRB 160630A: Zadko observatory - Gingin optical observations
  64. GRB 160630A: TAROT La Silla observatory optical observations
  65. GRB 160630A: Swift/UVOT Upper Limits
  66. GRB 160630A: Swift-XRT refined Analysis
  67. GRB 160625A: GROND upper limits
  68. GRB 160629A: Fermi GBM observation
  69. GRB 160630A: REM NIR observations
  70. GRB 160630A: Enhanced Swift-XRT position
  71. GRB 160630A: GROND Afterglow Detection
  72. GRB 160630A: Swift detection of a burst
  73. GRB 160629A: TAROT Calern observatory optical detection
  74. GRB 160629A: a long GBB detected by INTEGRAL
  75. GRB 160625B: TSHAO optical observations, correction GCN 19619
  76. GRB 160625B: TSHAO optical observations
  77. GRB 160625B CALET Gamma-Ray Burst Monitor detection
  78. GRB 160623A: SAO RAS optical observations
  79. Konus-Wind observation of a bright burst from SGR 1935+2154
  80. GRB 160625B: Global MASTER-Net prompt optical emission detection
  81. GRB 160625B: SAO RAS optical observations
  82. GRB 160625B: TSHAO optical observations
  83. Konus-Wind observation of GRB 160625B
  84. GRB 160625B: Mini-MegaTORTORA detection of bright optical flash simultaneous with LAT event
  85. GRB 160625B: RATIR Optical and NIR Observations
  86. GRB 160625B: MITSuME Ishigakijima Optical Observation
  87. Swift Trigger 701668 is probably not an astrophysical event
  88. IPN Triangulation of GRB 160620A (short/hard)
  89. GRB 160625A: Swift/UVOT Upper Limits
  90. GRB 160625A: Swift-BAT refined analysis
  91. GRB 160625A: Swift-XRT refined Analysis
  92. Trigger 701590: Swift detection of a bright outburst from SGR 1935+2154
  93. GRB 160625B: Swift/UVOT Detection
  94. GRB 160625B: RATIR Optical and NIR Afterglow Detection
  95. GRB 160625B: Fermi GBM refined analysis
  96. GRB 160625B: Fermi-LAT refined analysis
  97. GRB 160625B: Swift-XRT afterglow detection
  98. GRB 160625A: Enhanced Swift-XRT position
  99. GRB 160625B: Fermi GBM initial observations
  100. GRB 160625A: Swift-XRT observations

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