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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"

24527 results found.

  1. Konus-Wind observation of GRB 140930B
  2. GRB 140930B: Keck NIR imaging
  3. GRB 140928A: MAXI-GSC detection
  4. GRB 140930B: ISON-Kislovodsk observations
  5. GRB 140930B: MASTER early optical observations
  6. Konus-Wind observation of GRB 140928A
  7. GRB 140928A: LCO-Cerro Tololo further observations
  8. IPN Triangulation of GRB 140928A
  9. GRB 140928A: LCO-Cerro Tololo observations
  10. GRB 140928A: Fermi GBM detection
  11. GRB 140928A: Fermi-LAT detection
  12. GRB 140927A: Swift-BAT refined analysis
  13. GRB 140919A, Swift-BAT refined analysis
  14. GRB 140919A: Fermi GBM observation
  15. GRB 140919A: Swift-XRT observations
  16. GRB 140919A: Swift detection of a burst
  17. GRB 140916B: LOT and iPTF follow-up of optical afterglow candidates
  18. GRB 140916A: Swift-BAT refined analysis
  19. GRB 140916A: Swift-XRT refined Analysis
  20. GRB 140916A: MITSuME Okayama upper limits
  21. GRB 140916B: iPTF Optical Observations
  22. GRB 140916A: FTS observations
  23. GRB 140907A: Continued DCT Observations
  24. GRB 140903A: Chandra detection of the afterglow
  25. GRB 140909A: Swift-XRT observations
  26. GRB 140907A: TShAO observations
  27. GRB 140909A: Swift detection of a GRB
  28. Konus-Wind observation of GRB 140906C
  29. GRB 140907A: MASTER optical observations
  30. GRB 140907A: Nishi-Harima NIR Observations
  31. GRB 140907A: MITSuME Akeno Optical Observation
  32. IPN Triangulation of GRB 140906C (short/hard)
  33. GRB 140907A: Swift-BAT refined analysis
  34. GRB 140907A: Fermi GBM Detection
  35. GRB 140907A: MITSuME Ishigakijima Optical Observation
  36. GRB140907A: MITSuME Okayama Optical Observation
  37. GRB 140906B: Fermi GBM Detection of a Long GRB
  38. GRB 140907A : Optical observations from Nanshan
  39. GRB 140906A - Fermi GBM Detection
  40. GRB 140906A: iPTF optical transient candidates
  41. GRB 140903A: Confirmation of Optical Fading from Discovery Channel Telescope
  42. GRB 140901B: Fermi GBM detection
  43. GRB 140903A: P60 Optical Observations
  44. GRB 140903A: Swift-BAT refined analysis
  45. GRB 140903A: Confirmed Swift detection of a short burst
  46. GRB 140903A: Preliminary Swift/XRT localization
  47. GRB 140903A: Swift detection of a possible burst
  48. GRB 140901A: Fermi GBM detection
  49. IPN Triangulation of GRB 140901A (short/hard/very intense)
  50. GRB 140831A: iPTF observations of a possible short burst detected by Fermi GBM
  51. GRB 140829A: Fermi GBM Detection
  52. GRB 140829A: iPTF optical observations
  53. GRB 140828A, Swift-BAT refined analysis
  54. Konus-Wind observation of GRB 140825A
  55. GRB 140828A: Fermi GBM observation
  56. IPN Triangulation of GRB 140825A (very intense/long)
  57. GRB 140828A: Swift detection of a burst
  58. Fermi TRIGGER_NUM 430645968: MASTER OT inside error box
  59. Swift Mission Operations Center Moving Tomorrow
  60. GRB 140824B: Fermi GBM Detection
  61. GRB 140821A: Fermi GBM Detection
  62. Fermi TRIGGER_NUM 430583595: MASTER OT JR011101.13+603337.5 detection
  63. GRB 140824A: NOT optical upper limits
  64. GRB 140824A: Swift-BAT refined analysis
  65. GRB 140824A: MITSuME Ishigakijima upper limits
  66. GRB 140824A: Swift detection of a burst
  67. Fermi GBM Trigger 140819576/ 430148973/ MASTER OT
  68. GRB140819A: Deep GROND Upper Limits
  69. Fermi 430148973/MASTER candidate: LCO-Sutherland observations
  70. GRB 140818B, Swift-BAT refined analysis
  71. Fermi trigg_num 430148973: bright OT inside large error box!
  72. Konus-Wind observation of GRB 140818A
  73. GRB 140818B: Fermi GBM detection
  74. GRB 140818B: Swift detection of a burst
  75. GRB 140818A - Fermi GBM Detection
  76. GRB 140818A: Swift-XRT and UVOT potential afterglow detection
  77. GRB 140818A: Correction to GCN 16702
  78. Konus-Wind observation of GRB 140817A
  79. GRB 140817A: Swift-XRT refined Analysis
  80. GRB 140817A: Fermi GBM Detection
  81. GRB 140817A: Swift-BAT refined analysis
  82. GRB 140808A / PTFeag: VLA K-band observations
  83. GRB 140815A: GROND afterglow candidate
  84. GRB 140815A: Swift-XRT observations
  85. GRB 140815A: A long GRB detected by INTEGRAL
  86. GRB 140814A: MASTER optical follow-up inspection
  87. Swift Mission Operations Center Moving
  88. GRB 140808A / iPTF14eag optical follow-up at HCT
  89. IPN triangulation of GRB 140810A
  90. GRB140809A: Fermi GBM observation
  91. GRB 140810A: Fermi GBM observation
  92. Konus-Wind observation of GRB 140810A
  93. GRB140810A: Fermi-LAT detection
  94. Swift trigger 609139 is probably 4U 1850-03
  95. GRB 140809A (FERMI trigger 429246673): MASTER follow-up inspection
  96. Konus-Wind observation of GRB 140808A
  97. GRB 140808A: Swift-XRT observations
  98. GRB 140808A: Fermi GBM detection
  99. GRB 140808A: optical afterglow candidate iPTF14eag
  100. Konus-Wind observation of GRB 140801A

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