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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"

43881 results found.

  1. GRB 160816A: RATIR Optical and NIR Afterglow Confirmation
  2. GRB 160816A: confirmed fading with the LT
  3. GRB 160816A iTelescope observation
  4. Fermi GBM Observations of IceCube-160806A
  5. GRB 160814A: CALET Gamma-Ray Burst Monitor detection
  6. GRB 160816A: Swift/UVOT Detection
  7. GRB 160816A: IPN annulus
  8. GRB 160804A: 15 GHz detections and upper limit from AMI
  9. GRB 160801A: 15 GHz upper limits from AMI
  10. GRB 160714A: 15 GHz upper limits from AMI
  11. Konus-Wind observation of GRB 160816A
  12. GRB 160816A: RATIR Optical and NIR Observations
  13. GRB 160816A: LCOGT-FTN optical candidate
  14. GRB 160816A: Swift-XRT afterglow detection
  15. GRB 160816A: MASTER inspection
  16. GRB 160816730A: Fermi GBM detection/observation
  17. GRB 160816A: Swift ToO observations
  18. GRB 160816A: Fermi-LAT detection
  19. GRB 160815A: Swift/UVOT Detection
  20. Konus-Wind observation of GRB 160814A
  21. GRB 160815A: Swift-BAT refined analysis
  22. GRB 160815A: Swift-XRT refined Analysis
  23. GRB 160815A: Fermi GBM detection/observation
  24. GRB 160815A: Enhanced Swift-XRT position
  25. GRB 160815A: Swift detection of a burst
  26. GRB 160814A: MAXI/GSC detection
  27. GRB 160804B: CALET Gamma-Ray Burst Monitor detection
  28. IceCube 160806A: Lomonosov BDRG gamma ray prompt observations
  29. Fermi GBM trigger 160812507/492696620 is not a GRB
  30. INTEGRAL/SPI-ACS and IBIS_VETO search for prompt gamma-ray counterpart of IceCube-160806A
  31. Fermi GBM trigger 160810523/492525192 is not a GRB
  32. IceCube 160806A EHE Neutrino Candidate Event
  33. GRB 160806A: Fermi GBM observation
  34. Konus-Wind observation of GRB 160806A
  35. IPN Triangulation of GRB 160806A
  36. Swift Trigger 707517 is not an astrophysical event
  37. GRB160802A - Astrosat CZTI detection
  38. Swift Trigger 707545 is likely 4U 1850-03/GS1843-02
  39. Swift Trigger 707517 is probably not a GRB
  40. GRB 160804A: RATIR Optical and NIR Observations
  41. GRB 160802A: CALET Gamma-Ray Burst Monitor detection
  42. IceCube-160731A: Konus-Wind limits
  43. GRB 160804A: TSHAO optical observations
  44. GRB 160804A: ISON/UAFO optical observations
  45. GRB 160804A: GROND observations
  46. GRB 160804A: VLT/X-shooter redshift
  47. Search for counterpart to IceCube-160731A with ANTARES
  48. GRB 160804A: SAO RAS optical observations
  49. GRB 160804A: TNG optical observations, afterglow fading and candidate host galaxy
  50. GRB 160804A: Fermi GBM observation
  51. GRB160804A: MASTER-SAAO observation
  52. Konus-Wind observation of GRB 160802A
  53. IPN Triangulation of GRB 160802A
  54. GRB 160804A: Swift-BAT refined analysis
  55. GRB 160804A: Swift/UVOT Detection
  56. GRB 160804A: Swift-XRT refined Analysis
  57. GRB 160804A: Enhanced Swift-XRT position
  58. GRB 160804A: Swift detection of a burst
  59. IceCube-160731A: iPTF P48 Observations
  60. GBM Observations of IceCube 160731
  61. GRB 160801A: TSHAO optical observations
  62. GRB 160801A: SAO RAS optical observations
  63. GRB 160802A: Fermi GBM detection
  64. GRB 160801A: NOT upper limits
  65. FACT follow-up of IceCube20160731
  66. GRB 160726A: CALET Gamma-Ray Burst Monitor detection
  67. GRB 160801A: Swift-XRT refined Analysis
  68. GRB 160801A: Swift-BAT refined analysis
  69. Global MASTER net follow up of IceCube-160731A
  70. Swift follow up of IceCube-160731A
  71. GRB 160801A: Enhanced Swift-XRT position
  72. GRB 160801A: Swift detection of a burst
  73. HAWC follow up of IceCube 160731
  74. GRB 160716A: TAROT La Silla observatory optical observations
  75. GRB160720A: Astrosat CZTI detection
  76. GRB160709A: Astrosat CZTI detection of short GRB
  77. GRB160703A: Astrosat CZTI detection
  78. GRB 160705B: 15 GHz upper limits from AMI
  79. GRB 160703A: 15 GHz upper limits from AMI
  80. GBM observation of SGR-like burst from the direction of PSR 1119-6127
  81. Trigger 706396: Swift detection of a short burst from PSR 1119-6127
  82. GRB 160726A, Swift-BAT refined analysis
  83. Konus-Wind observation of short GRB 160726A
  84. GRB 160726A: Fermi GBM observation
  85. GRB 160726A: Swift detection of a short burst
  86. GRB 160721A: CALET Gamma-Ray Burst Monitor detection
  87. GRB 160720A CALET Gamma-Ray Burst Monitor detection
  88. Konus-Wind observation of GRB 160720A
  89. IPN Triangulation of GRB 160720A
  90. GRB 160703, GRB 160705, GRB 160720, SGR1935+2154: First SGRs and GRBs detected by Lomonosov.
  91. GRB 160720A: Fermi GBM detection
  92. Fermi GBM trigger 490701713/160720418 is not a GRB
  93. Fermi GBM trigger 490365157/160716523 is not a GRB
  94. GRB 160716A: Swift/UVOT Detection
  95. GRB 160716A: Swift-BAT refined analysis
  96. GRB 160716A: Swift-XRT refined Analysis
  97. GRB 160716A: Enhanced Swift-XRT position
  98. GRB 160716A: Swift detection of a burst
  99. Swift Trigger 704327: KAIT Optical Observations
  100. Swift Trigger 704444 is probably not an astrophysical event.

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