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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"

24534 results found.

  1. GRB 141004A: a long GRB detected by INTEGRAL
  2. GRB 141004A: Swift detection of a burst with an optical counterpart
  3. Swift observations of HD 305560
  4. GRB 140930B: MASTER early possible OT detection
  5. Swift possible detection of the Be star HD 305560
  6. GRB 140930A/MAXI J2259+524: MASTER optical observations
  7. GRB 140930B Swift-BAT refined analysis
  8. Konus-Wind observation of GRB 140930B
  9. GRB 140930B: Keck NIR imaging
  10. GRB 140928A: MAXI-GSC detection
  11. GRB 140930B: ISON-Kislovodsk observations
  12. GRB 140930B: MASTER early optical observations
  13. Konus-Wind observation of GRB 140928A
  14. GRB 140928A: LCO-Cerro Tololo further observations
  15. IPN Triangulation of GRB 140928A
  16. GRB 140928A: LCO-Cerro Tololo observations
  17. GRB 140928A: Fermi GBM detection
  18. GRB 140928A: Fermi-LAT detection
  19. GRB 140927A: Swift-BAT refined analysis
  20. GRB 140919A, Swift-BAT refined analysis
  21. GRB 140919A: Fermi GBM observation
  22. GRB 140919A: Swift-XRT observations
  23. GRB 140919A: Swift detection of a burst
  24. GRB 140916B: LOT and iPTF follow-up of optical afterglow candidates
  25. GRB 140916A: Swift-BAT refined analysis
  26. GRB 140916A: Swift-XRT refined Analysis
  27. GRB 140916A: MITSuME Okayama upper limits
  28. GRB 140916B: iPTF Optical Observations
  29. GRB 140916A: FTS observations
  30. GRB 140907A: Continued DCT Observations
  31. GRB 140903A: Chandra detection of the afterglow
  32. GRB 140909A: Swift-XRT observations
  33. GRB 140907A: TShAO observations
  34. GRB 140909A: Swift detection of a GRB
  35. Konus-Wind observation of GRB 140906C
  36. GRB 140907A: MASTER optical observations
  37. GRB 140907A: Nishi-Harima NIR Observations
  38. GRB 140907A: MITSuME Akeno Optical Observation
  39. IPN Triangulation of GRB 140906C (short/hard)
  40. GRB 140907A: Swift-BAT refined analysis
  41. GRB 140907A: Fermi GBM Detection
  42. GRB 140907A: MITSuME Ishigakijima Optical Observation
  43. GRB140907A: MITSuME Okayama Optical Observation
  44. GRB 140906B: Fermi GBM Detection of a Long GRB
  45. GRB 140907A : Optical observations from Nanshan
  46. GRB 140906A - Fermi GBM Detection
  47. GRB 140906A: iPTF optical transient candidates
  48. GRB 140903A: Confirmation of Optical Fading from Discovery Channel Telescope
  49. GRB 140901B: Fermi GBM detection
  50. GRB 140903A: P60 Optical Observations
  51. GRB 140903A: Swift-BAT refined analysis
  52. GRB 140903A: Confirmed Swift detection of a short burst
  53. GRB 140903A: Preliminary Swift/XRT localization
  54. GRB 140903A: Swift detection of a possible burst
  55. GRB 140901A: Fermi GBM detection
  56. IPN Triangulation of GRB 140901A (short/hard/very intense)
  57. GRB 140831A: iPTF observations of a possible short burst detected by Fermi GBM
  58. GRB 140829A: Fermi GBM Detection
  59. GRB 140829A: iPTF optical observations
  60. GRB 140828A, Swift-BAT refined analysis
  61. Konus-Wind observation of GRB 140825A
  62. GRB 140828A: Fermi GBM observation
  63. IPN Triangulation of GRB 140825A (very intense/long)
  64. GRB 140828A: Swift detection of a burst
  65. Fermi TRIGGER_NUM 430645968: MASTER OT inside error box
  66. Swift Mission Operations Center Moving Tomorrow
  67. GRB 140824B: Fermi GBM Detection
  68. GRB 140821A: Fermi GBM Detection
  69. Fermi TRIGGER_NUM 430583595: MASTER OT JR011101.13+603337.5 detection
  70. GRB 140824A: NOT optical upper limits
  71. GRB 140824A: Swift-BAT refined analysis
  72. GRB 140824A: MITSuME Ishigakijima upper limits
  73. GRB 140824A: Swift detection of a burst
  74. Fermi GBM Trigger 140819576/ 430148973/ MASTER OT
  75. GRB140819A: Deep GROND Upper Limits
  76. Fermi 430148973/MASTER candidate: LCO-Sutherland observations
  77. GRB 140818B, Swift-BAT refined analysis
  78. Fermi trigg_num 430148973: bright OT inside large error box!
  79. Konus-Wind observation of GRB 140818A
  80. GRB 140818B: Fermi GBM detection
  81. GRB 140818B: Swift detection of a burst
  82. GRB 140818A - Fermi GBM Detection
  83. GRB 140818A: Swift-XRT and UVOT potential afterglow detection
  84. GRB 140818A: Correction to GCN 16702
  85. Konus-Wind observation of GRB 140817A
  86. GRB 140817A: Swift-XRT refined Analysis
  87. GRB 140817A: Fermi GBM Detection
  88. GRB 140817A: Swift-BAT refined analysis
  89. GRB 140808A / PTFeag: VLA K-band observations
  90. GRB 140815A: GROND afterglow candidate
  91. GRB 140815A: Swift-XRT observations
  92. GRB 140815A: A long GRB detected by INTEGRAL
  93. GRB 140814A: MASTER optical follow-up inspection
  94. Swift Mission Operations Center Moving
  95. GRB 140808A / iPTF14eag optical follow-up at HCT
  96. IPN triangulation of GRB 140810A
  97. GRB140809A: Fermi GBM observation
  98. GRB 140810A: Fermi GBM observation
  99. Konus-Wind observation of GRB 140810A
  100. GRB140810A: Fermi-LAT detection

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