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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"

11794 results found.

  1. GRB 180316A: Swift detection of a burst
  2. GRB 180314A: MASTER-Net OT dtetction
  3. GRB 180311A: Swift-XRT refined Analysis
  4. Swift detection of MAXI J1820+070
  5. GRB 180311A: Swift detection of a burst
  6. Trigger 813449: Swift detection of large burst from XTE J1701-407
  7. Konus-Wind observation of GRB 180305A
  8. GRB 180305A: Fermi-LAT detection
  9. Konus-Wind observation of GRB 180223A
  10. Swift Trigger 811686 is probably not an astrophysical source.
  11. GRB 180224A: Swift-XRT refined Analysis
  12. GRB 180222A: A long GRB detected by INTEGRAL
  13. Swift Trigger 811167: Detection of MAXI J1813-095
  14. GRB 180205A: Mondy optical observations
  15. Swift Trigger 811074: possible GRB 180221A
  16. Konus-Wind observation of GRB 180218A
  17. IPN Triangulation of GRB 180218A (long/bright)
  18. Konus-Wind observation of GRB 180210A
  19. GRB 180210A: Swift-XRT afterglow detection
  20. GRB 180210A: Fermi-LAT detection
  21. GRB180205A: Optical observations with DOAO 1m telescope
  22. Fermi-GBM Detection of possible burst from AXP CXOU J164710.2-455216/PSR J1647-4552
  23. GRB 180205A: Swift-XRT refined Analysis
  24. Konus-Wind observation of GRB 180204A
  25. GRB 180205A: KAIT optical afterglow confirmation
  26. GRB 180120A: Fermi GBM Detection
  27. GRB 180120A CALET Gamma-Ray Burst Monitor detection
  28. Konus-Wind observation of GRB 171209A
  29. GRB 180115A: Swift/UVOT Detection
  30. Konus-Wind observation of GRB 180113B
  31. IPN Triangulation of GRB 180113B
  32. Konus-Wind observation of GRB 180113C
  33. e-MERLIN detection of GRB 171205A
  34. GRB 180116A: MAXI/GSC detection
  35. GRB 180115A: Redshift from OSIRIS/GTC
  36. Konus-Wind observation of GRB 180113A
  37. GRB 180115A: Swift-XRT refined Analysis
  38. Konus-Wind observation of GRB 180111A
  39. GRB 180113A: Swift detection of a burst
  40. GRB 180111A: Swift-XRT refined Analysis
  41. GRB180111A: Xinglong TNT possible optical detection
  42. GRB 180111A: Swift detection of a burst with an optical counterpart
  43. Konus-Wind observation of GRB 180103A
  44. Fermi GBM Trigger 537135776/180108849 is not a GRB
  45. GRB 180102A: MASTER-Net robotic report
  46. GRB 180102A: Swift-XRT refined Analysis
  47. GRB 180102A: Swift detection of a burst
  48. Konus-Wind observation of GRB 171227A
  49. Konus-Wind observation of GRB 171216B
  50. IceCube-171106A: Konus-Wind upper limits
  51. IceCube-170922A: Konus-Wind upper limits
  52. GRB 171222A: Swift-XRT refined Analysis
  53. GRB 171216A: Swift detection of a burst
  54. Swift Trigger 797070: KAIT Optical Observations
  55. GRB 171212B: Fermi-LAT detection
  56. Konus-Wind observation of GRB 171210A
  57. GRB 171211A: Swift-XRT refined Analysis
  58. GRB 171210A: Swift-XRT and UVOT observations
  59. GRB 171211A: Swift detection of a possibly short burst
  60. GRB 171209A: Lulin 1m telescope observations
  61. GRB 171210A: Fermi-LAT detection
  62. Konus-Wind observation of GRB 171205A
  63. GRB 171205A: Mondy optical observations
  64. GRB 171120A CALET Gamma-Ray Burst Monitor detection
  65. GRB 171205A: MASTER-SAAO optical observations of unusual OT
  66. Possible blackbody component in the X-ray spectrum of GRB171205A
  67. GRB 171205A: Swift-XRT refined Analysis
  68. GRB 171205A: Swift detection of a burst
  69. Pan-STARRS follow-up of IceCube-171106A
  70. LIGO/Virgo G299232: LOFAR follow-up
  71. INTEGRAL pointed follow-up of IceCube-171106A
  72. GRB 171124A: Fermi-LAT detection
  73. GRB 171123A: Swift-BAT refined analysis
  74. GRB 171123A: Swift-XRT refined Analysis
  75. GRB 171120A: Insight-HXMT detection
  76. GRB 171123A: Swift detection of a burst
  77. Konus-Wind observation of GRB 171119A
  78. GRB 171120A: Xinglong-2.16m optical upper limit
  79. GRB 171120A: AstroSat CZTI detection
  80. Konus-Wind observation of GRB 171120A
  81. GRB 171120A: MITSuME Akeno optical upper limits
  82. GRB 171120A: Fermi GBM Detection
  83. GRB 171120A: Swift-XRT refined Analysis
  84. GRB 171120A: Fermi-LAT detection
  85. GRB 171120A: Swift detection of a burst
  86. Fermi-LAT Gamma-ray Observations of IceCube-171106A
  87. GRB 171115A: Swift detection of a burst
  88. GRB 171112A: Fermi GBM Detection
  89. Konus-Wind observation of GRB 171112A
  90. Konus-Wind observation of GRB 171108A
  91. GRB 171112A: MAXI/GSC detection
  92. HAWC follow-up of IceCube-171106A
  93. GRB 171010A: afterglow and SN 2017htp optical observations
  94. GRB 171030A: MASTER inspection of the IPN error box of the short GRB.
  95. Konus-Wind observation of GRB 171103A (short/hard)
  96. GRB 171103A: Swift-BAT refined analysis of a short GRB
  97. Konus-Wind observation of GRB 171102A
  98. GRB 171102B: Swift detection of a burst
  99. GRB 171102A: Fermi-LAT detection
  100. GRB 171030A: IPN error box through NSs probability merging rate map

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