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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"

41907 results found.

  1. GRB 160221A: MASTER-SAAO early observations
  2. LVC GW 150914: TAROT/TZAC Final analysis
  3. GRB 160221A: Swift ToO observations
  4. GRB 160221A: A long GRB detected by INTEGRAL
  5. Konus-Wind observation of GRB 160220B
  6. Swift trigger 674752 is likely due to a noise fluctuation
  7. GRB 160220B: Swift-BAT refined analysis
  8. GRB 160220B: GROND Observations
  9. GRB 160219A: Fermi GBM detection
  10. GRB 160220A: nIR observations at AAT
  11. GRB 160220A: Swift-XRT refined Analysis
  12. GRB 160220A: Swift-BAT refined analysis
  13. GRB160220B: Swift/UVOT observations
  14. GRB 160220B: Swift-XRT refined Analysis
  15. IPN Triangulation of GRB 160219A (short/hard)
  16. LIGO/Virgo GW150914
  17. GRB160220A: Swift/UVOT observations
  18. Swift Trigger 674752 is likely a noise fluctuation in the direction of IGR17488-3253
  19. GRB 160220B: Swift detection of a burst
  20. GRB 160220A: MASTER-Amur observations
  21. GRB 160220A: GROND Optical/NIR Upper Limits
  22. GRB 160220A: Fermi GBM observation
  23. GRB 160220A: Swift detection of a burst
  24. LIGO/Virgo GW150914: BOOTES-3 simultaneous imaging
  25. LIGO/Virgo G184098: MASTER arhival results
  26. GRB 160216A: Swift-BAT refined analysis
  27. Konus-Wind observation of GRB 160216A (and GRB 160216B)
  28. GRB 160216A: Swift-XRT refined Analysis
  29. LIGO/Virgo G184098: Correction for GCN Circular 18361
  30. GRB 160216A: Swift/UVOT Upper Limits
  31. GRB 160216A: Swift detection of a burst
  32. LIGO/Virgo G184098: MAXI/GSC search for an X-ray counterpart of GW150914
  33. Fermi GBM trigger 477254668/160215781 is not a GRB
  34. GRB160131A: detection of polarisation by Astrosat CZTI
  35. GRB 160131A: second epoch observations with the GMRT
  36. Low frequency GMRT observations of GRB 160131A
  37. GRB 160206A: Kiso/KWFC optical observations
  38. GRB 160203A: RATIR Upper Limits
  39. GRB 160206B: Fermi GBM detection
  40. LIGO/Virgo G211117: LOFAR follow-up
  41. GRB 160131A: TSHAO optical observations
  42. GRB 160203A: MITSuME Akeno optical upper limits
  43. Swift Trigger 672897 is probably not an astrophysical event
  44. GRB 151215A: TAROT Calern observatory very early optical detection
  45. GRB 160206A: Swift/UVOT observations
  46. GRB 160203A: Swift-BAT refined analysis
  47. GRB 160206A: GROND Observations
  48. GRB 160206A: Swift-XRT observations
  49. GRB 160206B: iPTF P48 Observations and Optical Transient Candidates
  50. GRB 160206A: Tiled Swift observations
  51. GRB 160206A: MAXI/GSC detection
  52. GRB 160131A: TSHAO optical observations
  53. GRB 160131A: Mondy optcial observations
  54. GRB 160203A: TSHAO optical observations
  55. GRB 160203A: RATIR Optical Observations
  56. GRB 160131A: RATIR Optical Observations
  57. GRB 160203A: Skynet PROMPT-CTIO observations of the optical afterglow
  58. GRB 160203A: Swift-XRT refined Analysis
  59. GRB 160203A: Swift/UVOT Detection
  60. The bright GRB160203A: X-shooter spectroscopy and redshift
  61. GRB 160203A: LCOGT-Cerro Tololo optical afterglow confirmation
  62. GRB 160203A: GROND Afterglow Candidate
  63. GRB 160203A: Swift detection of a burst
  64. GRB 160131A: correction to VLA position
  65. GRB 160131A: VLA detection
  66. GRB160131A: NOEMA detection of the millimetre afterglow
  67. Fermi GBM trigger 475675010/160128498 is not a GRB
  68. Konus-Wind observation of GRB 160131A
  69. GRB 160131A: Optical observations from T150 OSN
  70. GRB 160131A: AbAO optical observations
  71. GRB 160131A: Mondy optical observations
  72. GRB 160131A Swift/UVOT Detection
  73. GRB 160131A: Xinglong/BFOSC spectroscopy
  74. GRB 160131A: MITSuME Ishigakijima Optical Observation
  75. GRB 160131A: GROND Detection of the Optical/NIR Afterglow
  76. GRB 160131A: GTC spectroscopy of the afterglow
  77. GRB 160131A: TNG spectroscopic observations and redshift
  78. GRB 160131A: Bassano Bresciano Observatory optical observations
  79. GRB 160131A: Swift-XRT refined Analysis
  80. GRB 160131A: Khureltogot optical observations
  81. GRB 160131A: TNG optical observations
  82. GRB 160131A: Swift-BAT refined analysis
  83. GRB 160131A: LCOGT-SSO optical observations
  84. GRB 160131A: RATIR Optical Observations
  85. GRB 160131A: Xinglong 60cm WFT optical observation
  86. GRB160131A: Xinglong TNT optical observation
  87. GRB 160131A: LCOGT-FTN optical afterglow observations
  88. GRB160131.35 MASTER-Net OT detection
  89. GRB 160131A: Swift detection of a burst with an optical counterpart
  90. GRB 160127A: RATIR Optical Observations
  91. GRB 160127A: Khureltogot optical observations
  92. GRB 160127A: MITSuME Akeno optical upper limits
  93. GRB 160127A: VLA Detection
  94. GRB 160127A: LCOGT-Sutherland optical upper limit
  95. GRB 160127A: Swift/UVOT Detection
  96. GRB 160127A: Swift-BAT refined analysis
  97. GRB 160127A: Swift-XRT refined Analysis
  98. GRB 160123A: TAROT La Silla observatory optical observations
  99. GRB 160127A: RATIR Optical Observations
  100. GRB 160127A: TAROT La Silla observatory optical light curve

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