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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"

24536 results found.

  1. GRB 141207A: Fermi-LAT Detection
  2. GRB141121A: Discovery Channel Telescope Optical Observations
  3. GRB 141205A: Fermi GBM detection
  4. Konus-Wind observation of GRB 141202A
  5. GRB 141202A: Swift XRT observations
  6. GRB 141202A: Fermi GBM Detection
  7. IPN Triangulation of GRB 141202A (short/hard)
  8. GRB 141030A: Nanshan very early optical observations
  9. GRB 141130A: Swift-BAT refined analysis
  10. GRB 141130A: Swift-XRT refined Analysis
  11. GRB 141121A: VLA radio detection
  12. GRB 141130A: Nanshan optical observations
  13. GRB 141121A: MITSuME Ishigakijima Optical Observation after 7 days
  14. GRB 141121A: SPI-ACS/INTEGRAL observations
  15. Konus-Wind observation of GRB 141121A
  16. IPN Triangulation of GRB 141125A (short/hard)
  17. GRB 141121A: MITSuME Ishigakijima Optical Observation after 3 days
  18. GRB 141124A​: iPTF upper limits​
  19. GRB141124A: MASTER Detection of New Flare of QSO NVSS J075043+790917 During the Fermi Error Box inspection
  20. GRB 141118A: Fermi GBM Detection
  21. GRB 141121A: LCO-FTN rebrightening confirmation
  22. GRB 141121A: MITSuME Ishigakijima Optical Observation
  23. GRB 141121A: MITSuME Akeno Optical observation
  24. GRB 141121A: Swift-XRT refined Analysis
  25. GRB 141121A: RATIR Optical Observations
  26. GRB 141121A: Swift-BAT refined analysis
  27. GRB 141121A: LCO-FTN observations
  28. GRB 141118A: iPTF Optical Observations
  29. Konus-Wind observation of GRB 141118A
  30. GRB 141104A: further Swift-XRT observations and afterglow candidate
  31. GRB 141109A: VLA detection
  32. Swift Trigger 618402: probable noise event
  33. GRB 141109A: NOT r-band observation
  34. Konus-Wind observation of GRB 141109A
  35. GRB 141109B: MITSuME Akeno upper limits
  36. GRB141109A : Xinglong TNT optical observation
  37. GRB 141109B: IRAM 30m millimetre observations
  38. GRB 141109A: MITSuME Ishigakijima upper limits
  39. GRB 141109B: Swift-BAT refined analysis
  40. GRB 141109A: Swift-BAT refined analysis
  41. GRB 141104A: Swift-XRT observations
  42. GRB 141017A: Skynet PROMPT-CTIO/SSO Observations
  43. Konus-Wind observation of GRB 141104A
  44. IPN Triangulation of GRB 141104A (long/very bright)
  45. Konus-Wind observation of GRB 141102A
  46. GRB 141022A: Skynet PROMPT-CTIO Observations
  47. GRB 141102A: Fermi GBM detection
  48. GRB 141031B: MITSuME Ishigakijima upper limits
  49. GRB 141031B: Swift-BAT refined analysis
  50. GRB 141031A, Swift-BAT refined analysis
  51. GRB 141031A: Skynet PROMPT-CTIO Observations
  52. GRB 141004A: Continued Late Time RATIR Optical and NIR Observations
  53. GRB 141031A: VLT/X-shooter optical observations
  54. GRB 141031A: Fermi GBM detection
  55. GRB 141031B: MASTER early optical observations
  56. GRB 141031B: Swift detection of a burst
  57. GRB 141029B: Fermi GBM detection
  58. GRB 141028A: LCOGTN observations
  59. GRB 141028A: Swift/XRT detection of the X-ray afterglow
  60. GRB 141028A: GROND Afterglow confirmation (MASTER source)
  61. GRB 141026A: IRAM 30m millimetre observations
  62. GRB 141028A: Fermi GBM detection
  63. GRB 141028A: Fermi-LAT detection
  64. GRB 141026A: GTC spectroscopy
  65. GRB 141026A: Skynet PROMPT-CTIO/Yerkes-41 Observations
  66. GRB 141004A: Continued RATIR Late Time Optical and NIR Observations
  67. GRB 141026A: Continued RATIR Optical and NIR Observations, Afterglow Detection
  68. GRB 141026A: Swift-XRT refined Analysis
  69. GRB 141026A: Swift-BAT refined analysis
  70. GRB 141026A: MASTER early optical observations
  71. GRB 141026A: GROND observations
  72. GRB 141026A: Swift detection of a burst
  73. GRB141022A: Fermi GBM Detection
  74. GRB141022B: Fermi GBM Detection
  75. GRB 141022A: Swift-BAT refined analysis
  76. GRB 141022A: Swift detection of a burst
  77. GRB 141004A: RATIR Late Time Optical and NIR Observations
  78. GRB 141004A: La Palma late-time observations and possible brightening
  79. GRB 141020A: Swift-BAT refined analysis
  80. GRB 141020A: Swift-XRT refined Analysis
  81. Konus-Wind observation of GRB 141017A
  82. GRB 141020A: Swift detection of a burst with an optical counterpart
  83. GRB 141017A, Swift-BAT refined analysis
  84. GRB 141017A: GROND Afterglow Confirmation
  85. GRB 141015A: MITSuME Akeno upper limits
  86. GRB 141017A: Swift-XRT refined Analysis
  87. GRB 141015A: MITSuME Okayama upper limits
  88. GRB 141015A: Swift-BAT refined analysis
  89. GRB 141015A: LCO-McDonald observations
  90. GRB 141015A: Super-LOTIS early observations
  91. GRB 141015A: Swift/XRT localization
  92. GRB 141015A: Swift detection of a burst
  93. Konus-Wind observation of GRB 141011A
  94. IPN Triangulation of GRB 141011A (short/hard)
  95. GRB 141011A: Fermi GBM detection
  96. GRB141004A: Host galaxy redshift form GTC
  97. GRB 141004A: Fermi GBM observation
  98. Konus-Wind observation of GRB 141005A
  99. GRB 141005A: Swift-BAT refined analysis
  100. GRB 141004A: Swift-BAT refined analysis

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