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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"

6829 results found.

  1. GRB 170115B: Fermi GBM detection
  2. GRB 170114A: Fermi GBM detection
  3. GRB 170113A: Swift-XRT refined Analysis
  4. GRB 170113A: Fermi GBM observations
  5. GRB 170112A: Swift-XRT observations
  6. GRB 170111A: Swift-XRT refined Analysis
  7. LIGO/Virgo G268556: Swift-XRT confirms that ATLAS17aeu is fading in X-rays
  8. LIGO/Virgo G268556/GW170104: Lomonosov BDRG observations
  9. Swift Trigger 730874 is not astrophysical
  10. LIGO/Virgo G268556: Swift-XRT detection of ATLAS17aeu
  11. LIGO/Virgo G268556: Fermi-LAT search for high-energy gamma-ray counterpart
  12. LIGO/Virgo G268556: Swift-XRT sources
  13. GRB 170101B: Lomonosov BDRG gamma ray discovery
  14. GRB 170101B: Fermi GBM detection
  15. GRB 161224A: Swift-XRT refined Analysis
  16. GRB 161220A: Swift-XRT refined Analysis
  17. GRB 161219B: Swift-XRT refined Analysis
  18. GRB 161218B: Fermi GBM detection
  19. GRB 161217A: Swift-XRT refined Analysis
  20. Fermi-LAT Gamma-ray Observations of IceCube-161210
  21. GRB 161214B: Swift-XRT refined Analysis
  22. GRB 161214B: NOT optical observations, possible counterpart
  23. HAWC follow-up on IceCube-161210
  24. INTEGRAL SPI-ACS and IBIS/Veto observation of IceCube-161210
  25. GRB 161206A: Fermi GBM detection
  26. GRB 161202A: Swift-XRT refined Analysis
  27. GRB 161202A: Fermi-LAT detection
  28. GRB 161129A: MITSuME Okayama Ks-band Observation
  29. GRB 161129A: Fermi GBM Detection
  30. GRB 161129A: TSHAO optical observations / possible afterglow+host galaxy
  31. GRB 161129A: Swift-XRT refined Analysis
  32. GRB 161123A: Swift-XRT observations
  33. GRB 161117B: Swift-XRT refined Analysis
  34. GRB 161117A: Fermi GBM detection/observation
  35. GRB 161117A: Swift-XRT refined Analysis
  36. GRB 161113A: Swift-XRT refined Analysis
  37. GRB 161109A: Swift/UVOT Upper Limits
  38. GRB 161104A: Chandra X-ray observations
  39. GRB 161109A: Lomonosov BDRG gamma ray discovery
  40. GRB 161109A: Swift-XRT observations
  41. GRB 161109A: Fermi GBM observation
  42. GRB 161109A: Fermi-LAT detection
  43. GRB 161108A: Swift-XRT refined Analysis
  44. Fermi LAT Gamma-ray Observations of IceCube-161103
  45. GRB 161103A: an ultra-long GRB detected by Konus-Wind
  46. GRB 161106A: Fermi GBM detection
  47. GRB 161105A: Swift-XRT refined Analysis
  48. GRB 161104A: Swift-XRT refined Analysis
  49. Fermi GBM Observations of IceCube-161103
  50. IceCube-161103: Swift-XRT observations
  51. INTEGRAL SPI-ACS and IBIS/Veto observation of IceCube-161103
  52. HAWC follow up of IceCube-161103
  53. GRB 161020A: Fermi GBM observation
  54. GRB 161023A: Swift-XRT afterglow detection
  55. GRB 161022A: Fermi GBM observation
  56. GRB 161022A: Swift-XRT refined Analysis
  57. GRB 161015A: further Swift-XRT follow-up observations
  58. GRB 161017A: Lomonosov Gamma Ray and MASTER Optical prompt observations
  59. GRB 161017A: Swift-XRT refined Analysis
  60. GRB 161017A: Fermi GBM observation
  61. GRB 161015A: Swift/UVOT observations
  62. GRB 161015A: Swift-XRT observations
  63. GRB 161015A: Fermi GBM detection
  64. GRB 161015A: Fermi-LAT detection
  65. GRB161004A: Further analysis of the burst nature
  66. GRB 161014A: Fermi GBM observation
  67. GRB 161014A: Swift-XRT refined Analysis
  68. GRB 161014A: Swift/UVOT Detection
  69. GRB 161014A: Swift-XRT and UVOT afterglow detection
  70. GRB 161011A: Swift-XRT refined Analysis
  71. GRB 161010A: Swift-XRT afterglow detection
  72. GRB 161007A: Swift-XRT refined Analysis
  73. GRB 161001A: IRSF upper limits
  74. GRB 161004B: Fermi GBM detection
  75. GRB 161004B: Swift-XRT refined Analysis
  76. GRB 161004A: SAO RAS optical upper limit
  77. GRB 161004A: Swift-XRT refined Analysis
  78. GRB 161001A: Fermi GBM detection
  79. GRB 161001A: Swift-XRT refined Analysis
  80. GRB 160927A: Swift-XRT refined Analysis
  81. XRT refined analysis for GRB 160925A
  82. GRB 160925A: Optical spectroscopy of MASTER optical transient
  83. GRB 160917A: Fermi GBM observation
  84. GRB 160917A: Swift-XRT refined Analysis
  85. GRB 160912A: Swift-XRT refined Analysis
  86. GRB 160910A: Afterglow detection from OSN
  87. GRB 160910A: Swift-XRT afterglow detection
  88. GRB 160910A: Fermi-LAT detection
  89. GRB 160910A: Fermi GBM observation
  90. GRB 160905A: Swift-XRT refined Analysis
  91. GRB 160905A: Fermi-LAT detection
  92. GRB 160905A: Fermi GBM observation
  93. GRB 160829A: Swift-XRT observations
  94. GRB 160829A: Fermi GBM Detection
  95. GRB 160829A: Fermi-LAT detection of a short GRB
  96. Swift trigger 710022 is not astrophysical
  97. GRB 160825A: not localized by Swift
  98. GRB 160820A: Fermi GBM observation
  99. GRB 160826A: Swift-XRT refined Analysis
  100. GRB 160824A: Swift-XRT refined Analysis

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