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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"

45983 results found.

  1. IPN triangulation of short hard GRB 110705A
  2. Swift trigger 456780 is not a burst
  3. GRB 110705A: Fermi GBM detection
  4. Swift Trigger 456659 is probably not astrophysical
  5. Swift-BAT trigger 456532 is not astrophysical
  6. SGR 1E 1841-045: early optical limit by "Pi of the Sky"
  7. SGR 1E 1841-045: Swift-BAT refined analysis
  8. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  9. GRB 110625A: Suzaku WAM observation of the prompt emission
  10. Swift J185003.2-005627: 1.23m CAHA and BOOTES-3 observations
  11. GRB 110625A: Fermi GBM and LAT observations
  12. GRB 110625A: Swift/UVOT Upper Limits
  13. GRB 110625A: 1.23m CAHA I-band observations
  14. GRB 110625A: Fermi LAT detection
  15. GRB 110625A: GROND detection of a source inside the XRT error circle
  16. GRB 110625A: NIR Source
  17. GRB 110625A: Konkoly observations
  18. Konus-Wind observation of GRB 110625A
  19. GRB 110625A: Swift-XRT refined Analysis
  20. GRB 110625A: Swift-BAT refined analysis
  21. Swift J185003.2-005627: NIR Observation
  22. GRB 110625A: ROTSE-III Optical Limits
  23. GRB 110625A: Swift detection of a burst
  24. Swift J185003.2-005627: Swift-XRT/UVOT refined analysis
  25. Swift J185003.2-005627: Swift-BAT refined analysis
  26. Swift J185003.2-005627: TAROT La Silla observatory optical observations
  27. Swift J185003.2-005627: TAROT Calern observatory optical observations
  28. Swift J185003.2-005627: Swift detection of a burst from a new Galactic transient
  29. SGR 1E 1841-045: Swift-BAT refined analysis
  30. GRB 110618A: SMARTS optical observations
  31. GRB 110604A: final update on Swift-XRT observations
  32. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  33. Konus-Wind observation of GRB 110618A
  34. IPN triangulation of GRB110618A (long duration, extremely intense)
  35. Fermi Gamma-ray Burst Monitor trigger 110621949 is not a GRB
  36. GRB 110604A: Suzaku WAM observation of the prompt emission
  37. GRB 110610A: Suzaku WAM observation of the prompt emission
  38. GRB 110610A: Fermi GBM detection
  39. GRB 110610A: 1.23m CAHA optical observations
  40. GRB 110610A: Swift-XRT refined Analysis
  41. GRB 110610A: Swift/UVOT Upper Limits
  42. GRB 110610A: Enhanced Swift-XRT position
  43. GRB 110610A: Swift-BAT refined analysis
  44. Swift detection of the X-ray afterglow of GRB 110604A
  45. GRB 110610A: MASTER-NET optical observations
  46. GRB 110610A: Swift detection of a burst
  47. Konus-Wind observation of GRB 110604A
  48. GRB 110604A Detection by IPN Spacecraft and Swift-BAT
  49. GRB 110530A: optical observations in Mondy observatory
  50. GRB 110529A: Suzaku WAM observation of the prompt emission
  51. GMRT detection of GRB 110328A
  52. GRB 110530A: optical observations at Mt. Terskol, second epoch
  53. GRB 110530A: Swift-XRT refined Analysis
  54. GRB 110530A: Swift/UVOT Detection of a Fading Afterglow
  55. GRB 110530A: Xinglong TNT observation
  56. GRB 110530A: Enhanced Swift-XRT position
  57. GRB 110530A: NOT optical observations
  58. GRB110530A: MITSuME Okayama Optical Observation
  59. GRB 110530A: optical observations at Mt. Terskol
  60. GRB 110530A: Correction to GCN Circ 12050
  61. GRB 110530A: MASTER OT observations
  62. GRB 110530A: Swift-BAT refined analysis
  63. GRB 110530A: MITSuME Akeno Optical Observation
  64. GRB 110529A: Fermi GBM detection
  65. GRB 110530A: Swift detection of a burst with an optical afterglow
  66. Konus-Wind observation of GRB 110529A
  67. LAT Observations of GRB110529A
  68. EVLA afterglow limits on the high z GRB090429B
  69. Fermi Gamma-ray Burst Monitor trigger 328195911 is not a GRB
  70. Swift J1644+57/GRB 110328A, Additional HST Observations
  71. GRB 110521A: MASTER prompt optical limit
  72. GRB 110521A: Swift/UVOT Upper Limits
  73. GRB 110521A: Swift-XRT refined analysis
  74. GRB 110520A: NOT optical follow-ups
  75. GRB 110521A - NOT optical observation
  76. GRB 110521A: Swift-BAT refined analysis
  77. GRB 110521A: Enhanced Swift-XRT position
  78. GRB 110521A: MASTER synchronous and early optical observations limit
  79. Swift/UVOT observations of GRB110520A
  80. GRB 110521A: Swift detection of a burst
  81. GRB 110520A: Swift-BAT refined analysis
  82. GRB 110520A: IAC80 I-band observations
  83. GRB 110520A: Swift-XRT refined Analysis
  84. GRB 110520A: Enhanced Swift-XRT position
  85. GRB 110520A: WHT IR observations
  86. GRB 110520A - NOT optical observation
  87. GRB 110520A: Skynet/DAO optical observations
  88. GRB 110520A: Liverpool Telescope Observations
  89. GRB 110520A: TAROT Calern observatory optical observations
  90. GRB 110520A: MASTER-NET optical observations
  91. GRB 110520A: Swift detection of a burst
  92. Konus-Wind observation of GRB 110518A
  93. IPN localization of bright GRB 110518A
  94. Radio observations of GRB 110428A with the EVLA
  95. GRB 110519A, Swift-BAT refined analysis
  96. GRB 110519A: Swift detection of a burst
  97. GRB 110503A optical observation
  98. GRB 110426A: Fermi GBM detection
  99. GRB 110428A: Fermi-GBM observation
  100. GRB 110503A: TAROT Calern observatory optical observations

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