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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"

16293 results found.

  1. GRB 160227A: MASTER OT Detection
  2. GRB 160227A: Swift detection of a burst with an optical counterpart
  3. GRB 160225A: LOAO optical upper limit
  4. IPN Triangulation of GRB 160225B
  5. GRB 160225A: Continued RATIR Optical and NIR Observations
  6. GRB 160225A: RATIR Optical and NIR Observations
  7. GRB 160225A: Swift/UVOT Upper Limits
  8. GRB 160225A: Xinglong TNT optical observation
  9. GRB 160225A: NOT optical observations
  10. GRB 160225A: MITSuME Okayama Optical Observation
  11. GRB 160225A: MITSuME Akeno Optical Observation
  12. GRB 160223A: RATIR Optical and NIR Observations
  13. GRB 160225A: TSHAO optical upper limit
  14. GRB 160225A: MASTER-Amur early observations
  15. GRB 160223A: AbAO optical observations
  16. GRB 160223B: MASTER-Amur early observations
  17. GRB 160223B: Khureltogot optical observations
  18. GRB 160223B: LCOGT-FTN optical observations
  19. GRB 160223A: GROND optical/NIR afterglow
  20. Further Swift/UVOT observations of GRB 160220B
  21. GRB 160221A: MASTER-SAAO early observations
  22. GRB160220B: Swift/UVOT observations
  23. LIGO/Virgo GW150914
  24. GRB160220A: Swift/UVOT observations
  25. GRB 160220A: TAROT Calern and TAROT La Silla observatory optical observations
  26. GRB 160220A: MASTER-Amur observations
  27. GRB 160220A: GROND Optical/NIR Upper Limits
  28. LIGO/Virgo GW150914: BOOTES-3 simultaneous imaging
  29. LIGO/Virgo G184098: MASTER arhival results
  30. LIGO/Virgo G184098: Correction for GCN Circular 18361
  31. GRB 160216A: Swift/UVOT Upper Limits
  32. GRB 160206A: Kiso/KWFC optical observations
  33. GRB 160206B: Fermi GBM detection
  34. GRB 160131A: TSHAO optical observations
  35. GRB 160203A: MITSuME Akeno optical upper limits
  36. GRB 151215A: TAROT Calern observatory very early optical detection
  37. GRB 160206A: Swift/UVOT observations
  38. GRB 160203A: Zadko observatory - Gingin optical detection
  39. GRB 160206B: iPTF P48 Observations and Optical Transient Candidates
  40. GRB 160131A: TSHAO optical observations
  41. GRB 160131A: Mondy optcial observations
  42. GRB 160203A: TSHAO optical observations
  43. GRB 160203A: RATIR Optical Observations
  44. GRB 160131A: RATIR Optical Observations
  45. GRB 160203A: Skynet PROMPT-CTIO observations of the optical afterglow
  46. GRB 160203A: Swift/UVOT Detection
  47. GRB 160203A: LCOGT-Cerro Tololo optical afterglow confirmation
  48. GRB 160131A: VLA detection
  49. GRB 160131A: Optical observations from T150 OSN
  50. GRB 160131A: AbAO optical observations
  51. GRB 160131A: Mondy optical observations
  52. GRB 160131A: Xinglong/BFOSC spectroscopy
  53. GRB 160131A: MITSuME Ishigakijima Optical Observation
  54. GRB 160131A: GROND Detection of the Optical/NIR Afterglow
  55. GRB 160131A: TNG spectroscopic observations and redshift
  56. GRB 160131A: Bassano Bresciano Observatory optical observations
  57. GRB 160131A: Khureltogot optical observations
  58. GRB 160131A: TNG optical observations
  59. GRB 160131A: iTelescope optical observations
  60. GRB 160131A: LCOGT-SSO optical observations
  61. GRB 160131A: RATIR Optical Observations
  62. GRB 160131A: Xinglong 60cm WFT optical observation
  63. GRB160131A: Xinglong TNT optical observation
  64. GRB 160131A: LCOGT-FTN optical afterglow observations
  65. GRB160131.35 MASTER-Net OT detection
  66. GRB 160131A: Swift detection of a burst with an optical counterpart
  67. GRB 160127A: RATIR Optical Observations
  68. GRB 160127A: Khureltogot optical observations
  69. GRB 160127A: MITSuME Akeno optical upper limits
  70. GRB 160127A: VLA Detection
  71. GRB 160127A: LCOGT-Sutherland optical upper limit
  72. GRB 160123A: TAROT La Silla observatory optical observations
  73. GRB 160127A: RATIR Optical Observations
  74. GRB 160127A: TAROT La Silla observatory optical light curve
  75. GRB 160127A: Swift detection of a burst with an optical counterpart
  76. GRB 160121A: RATIR Optical Observations
  77. GRB 160121A: TSHAO optical observation
  78. GRB 160123A: NOT J-band observations
  79. GRB 160123A: Swift/UVOT Upper Limits
  80. GRB 160123A: LCOGT-SSO optical upper limit
  81. GRB 160121A: redshift from the 10.4m GTC
  82. GRB 160121A: RATIR Optical Observations
  83. GRB 160121A: Swift/UVOT Upper Limits
  84. GRB 160121A: TSHAO optical afterglow confirmation
  85. GRB 160121A: 1.8m MOA optical afterglow detection
  86. GRB 160117B: RATIR continued observations
  87. GRB 160117B: TNG spectroscopy and redshift confirmation
  88. GRB 160121A: MASTER-Amur observations
  89. GRB 160119A: VLA Detection
  90. GRB 160117B: VLA Detection
  91. GRB 160119A: afterglow confirmation from the NOT
  92. GRB 160119A: Swift/UVOT Upper Limits
  93. GRB 160119A: GROND optical/NIR afterglow observations
  94. GRB 160119A: RATIR Optical and NIR Observations
  95. GRB 160117B: RATIR Optical and NIR Observations
  96. GRB 160117B: further NOT optical observations of the afterglow
  97. GRB 160119A: NOT and GTC afterglow candidate
  98. GRB 160117B: Early iTelescope observation
  99. GRB 160117A: Swift/UVOT Upper Limits
  100. GRB 151228B: AbAO optical upper limit

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