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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"

43160 results found.

  1. Fermi/GBM Detection of two SGR-like bursts possibly associated with SGR J1833-0832
  2. GRB 130912A: 5.8 GHz VLA upper limit
  3. GRB 130912A: RATIR Optical and NIR Upper Limits
  4. Konus-Wind observation of GRB 130912A
  5. GRB 130912A: WHT confirmation of optical counterpart
  6. GRB 130907A: Continued RATIR Optical and NIR Observations
  7. GRB 130912A: P60 Observations
  8. GRB 130912A: Swift-XRT refined Analysis
  9. GRB 130907A: MASTER refined analysis
  10. GRB 130912A: Fermi GBM detection
  11. GRB 130912A: Skynet DSO-14/Yerkes-41/PROMPT-CTIO observations
  12. GRB 130912A: Enhanced Swift-XRT position
  13. GRB 130912A: REM optical/NIR upper limits
  14. GRB 130912A: KAIT optical upper limit
  15. GRB 130912A: Swift detection of a short burst
  16. GRB 130907A: AMI radio detection
  17. GRB 120419A: Swift XRT confirmation of the afterglow
  18. GRB 130907A: Continued RATIR Optical and NIR Observations
  19. GRB 130907A: RATIR Optical and NIR Observations
  20. GRB 130907A: WSRT radio detection
  21. GRB 130828A: Further Swift XRT observations
  22. GRB 130907A: Further Swift-BAT refined analysis
  23. GRB 130907A: INTEGRAL/SPI-ACS light curve
  24. Konus-Wind observation of GRB 130907A
  25. GRB 130907A: T21 optical observations
  26. GRB 130907A: Swift-XRT refined Analysis
  27. GRB 130907A: Enhanced Swift-XRT position
  28. Errata of GRB name in GCN 15196: should have been GRB 130907A instead of GRB 120916A
  29. GRB 120916A: Fermi-LAT detection of a burst
  30. GRB 130907A: Swift/UVOT Detection
  31. GRB 130907A: Early Tautenburg detections, red afterglow
  32. GRB 130907A: Skynet DSO-14/Yerkes-41/GORT confirmation of a fading afterglow
  33. GRB 130907A: RATIR Optical and NIR Afterglow Confirmation
  34. GRB 130907A: Skynet DSO-14/Yerkes-41 detections of a possible afterglow
  35. GRB 130831A: Maidanak optical observations
  36. GRB 130907A: NOT redshift
  37. GRB 130831A: ISON-UAFO optical observations
  38. GRB 130907A: MASTER early OT observations
  39. GRB 130907A: Swift detection of a burst with an optical counterpart
  40. Swift follow-up results of the possible weak INTEGRAL GRB
  41. GRB 130903A: Swift/UVOT Upper Limits
  42. Swift follow-up of an INTEGRAL possible weak GRB
  43. GRB 130831A: RATIR Optical and NIR Upper Limits
  44. GRB 130822A: nearby galaxy redshifts
  45. GRB 130903A: GROND Afterglow Discovery
  46. GRB 130903A: MASTER early optical limit
  47. GRB 130903A: Fermi GBM observation
  48. GRB 130831A: JCMT SCUBA-2 sub-mm observation
  49. GRB 130903A: Swift-XRT observations
  50. Swift trigger 569022 is a new Galactic source Swift J1734.5-3027
  51. GRB 130903A: ISON-Kislovodsk optical Upper Limits
  52. GRB 130903A: GROND Upper Limits
  53. GRB 130903A: A long GRB detected by INTEGRAL
  54. GRB 130831A: Swift/UVOT Observations
  55. GRB 130831A: Montarrenti Observatory optical follow-up
  56. GRB 130831A: Optical Observations via Virtual Telescope, follow-up
  57. GRB 130831A: RATIR Optical and NIR Observations
  58. GRB 130831A: Continued Skynet/PROMPT-SSO, PROMPT-CTIO and Yerkes-41 detections
  59. GRB 130831B, Swift-BAT refined analysis
  60. GRB 130831A: VLA Observations
  61. GRB 130831A: T100 observations
  62. GRB 130831B: Swift/UVOT Upper Limits
  63. GRB 130831A: CARMA mm upper limit
  64. GRB 130831B: GROND upper limits
  65. Swift Trigger 569022: a possible GRB
  66. GRB 130831A: THO optical observation
  67. GRB 130831A, Swift-BAT refined analysis
  68. GRB 130831B: Swift-XRT refined Analysis
  69. GRB 130831A: optical observations
  70. GRB 130831A: Optical Observations via Virtual Telescope
  71. GRB 130831A: Swift-XRT refined Analysis
  72. GRB 130831A: Montarrenti Observatory optical observations
  73. GRB 130831B: Enhanced Swift-XRT position
  74. GRB 130831A: Skynet/PROMPT-SSO detections
  75. GRB 130831A: Enhanced Swift-XRT position
  76. GRB 130831A : Xinglong 60cm optical observation
  77. Konus-Wind observation of GRB 130831A
  78. GRB 130831A: Gemini-North Redshift
  79. GRB 130831A: MITSuME Akeno Optical observation
  80. GRB 130831A: Weihai optical observations
  81. GRB 130831B: Swift detection of a burst
  82. GRB 130831A: Faulkes Telescope North and South optical afterglow
  83. GRB 130831A: Swift detection of a burst with an optical counterpart
  84. IPN triangulation of GRB 130828A - error box
  85. GRB 130822A: optical upper limits
  86. GRB 130829A: AAO optical observations
  87. GRB 130828A: Swift XRT and UVOT observations
  88. GRB 130829A: NOT optical observations
  89. Correction to GCN 15132 - GRB 130828A
  90. IPN triangulation of GRB 130828A
  91. GRB 130829A: Swift detection of a burst
  92. GRB 130828A Tiled Swift observations
  93. GRB 130828A: Fermi GBM detection
  94. GRB 130828A: Fermi-LAT detection of a burst
  95. IPN triangulation of GRB130821A
  96. Konus-Wind observation of GRB 130821A
  97. GRB 130821A: Weihai optical upper limit
  98. GRB 130821A: Swift-XRT observation
  99. GRB 130822A: 5.8 GHz VLA upper limit
  100. GRB 130822A: Gemini Observations

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