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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"

28275 results found.

  1. GRB 110719A: Swift-XRT refined Analysis
  2. GRB 110719A: optical upper limit
  3. GRB 110719A: Enhanced Swift-XRT position
  4. GRB 110719A: Swift-BAT refined analysis
  5. GRB 110719A: Swift detection of a burst
  6. GRB 110709B : Suzaku WAM observation of the prompt emission
  7. Swift J1822.3-1606: Transient Magnetar or Be X-ray Binary?
  8. GRB110715A: GROND Detection of the Optical/NIR Afterglow
  9. GRB 110715A: APEX detection of the submm counterpart
  10. GRB 110715A: Swift-XRT refined Analysis
  11. GRB 110715A: Swift/UVOT Detection
  12. GRB 110715A: Enhanced Swift-XRT position
  13. GRB 110715A: Swift-BAT refined analysis
  14. Swift J1822.3-1606: A Probable New SGR in Ground Analysis of BAT Data
  15. GRB 110715A: Swift detection of a bright burst with an optical counterpart
  16. GRB 110709B: Swift/UVOT Observations
  17. GRB 110709B: Additional Gemini observations and deep limits on an optical afterglow
  18. Swift trigger 457076 is not a GRB
  19. GRB 110709A: Suzaku WAM observation of the prompt emission
  20. GRB 110709B: Submm observations from APEX
  21. IPN triangulation of GRB 110708B (long duration, extremely intense)
  22. Swift Trigger 457076: a possible GRB
  23. GRB 110709A: Swift/UVOT Upper Limits
  24. GRB 110709A: Konkoly observations
  25. GRB 110708A: Konkoly observations
  26. GRB 110709B BAT refined analysis
  27. GRB 110709B: burst detection from Swift-BAT slew data
  28. GRB 110709B: Swift-XRT refined Analysis
  29. GRB 110709A: Swift-XRT refined Analysis
  30. GRB 110709B: Swift/UVOT Detection of Possible Optical Flaring
  31. GRB110709A: MITSuME Ishigakijima Optical upper limits
  32. GRB 110709B: Enhanced Swift-XRT position
  33. GRB 110709B: Gemini-South additional analysis and photometry
  34. GRB 110709B: Preliminary Swift-BAT refined analysis
  35. GRB 110709B: GROND Detection of an Afterglow Candidate
  36. GRB 110709B: Gemini-South optical observations
  37. GRB 110709A: Swift-BAT refined analysis
  38. GRB 110709B: possible quiescent source in DSS
  39. GRB 110709B: Swift detection of renewed activity at T+11 minutes.
  40. GRB 110709A: Enhanced Swift-XRT position
  41. GRB 110709B: Swift detection of a burst
  42. GRB 110708A: Swift/UVOT Observations
  43. GRB 110709A: Swift detection of a burst
  44. GRB 110708A: Liverpool Telescope observations
  45. GRB 110708A: Lick observations
  46. GRB 110708A: Swift/XRT afterglow candidate for the INTEGRAL burst
  47. GRB 110705A: Suzaku WAM observation of the prompt emission
  48. GRB 110625A, the review of the sky area in plate archives
  49. IPN triangulation of short hard GRB 110705A
  50. Swift trigger 456780 is not a burst
  51. GRB 110705A: Fermi GBM detection
  52. Swift Trigger 456659 is probably not astrophysical
  53. Swift-BAT trigger 456532 is not astrophysical
  54. SGR 1E 1841-045: early optical limit by "Pi of the Sky"
  55. SGR 1E 1841-045: Swift-BAT refined analysis
  56. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  57. GRB 110625A: Suzaku WAM observation of the prompt emission
  58. Swift J185003.2-005627: 1.23m CAHA and BOOTES-3 observations
  59. GRB 110625A: Fermi GBM and LAT observations
  60. GRB 110625A: Swift/UVOT Upper Limits
  61. GRB 110625A: 1.23m CAHA I-band observations
  62. GRB 110625A: Fermi LAT detection
  63. GRB 110625A: GROND detection of a source inside the XRT error circle
  64. GRB 110625A: Konkoly observations
  65. GRB 110625A: Swift-XRT refined Analysis
  66. GRB 110625A: Swift-BAT refined analysis
  67. Swift J185003.2-005627: NIR Observation
  68. GRB 110625A: Swift detection of a burst
  69. Swift J185003.2-005627: Swift-XRT/UVOT refined analysis
  70. Swift J185003.2-005627: Swift-BAT refined analysis
  71. Swift J185003.2-005627: TAROT La Silla observatory optical observations
  72. Swift J185003.2-005627: TAROT Calern observatory optical observations
  73. Swift J185003.2-005627: Swift detection of a burst from a new Galactic transient
  74. SGR 1E 1841-045: Swift-BAT refined analysis
  75. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  76. IPN triangulation of GRB110618A (long duration, extremely intense)
  77. GRB 110604A: Suzaku WAM observation of the prompt emission
  78. GRB 110610A: Suzaku WAM observation of the prompt emission
  79. GRB 110610A: Fermi GBM detection
  80. GRB 110610A: 1.23m CAHA optical observations
  81. GRB 110610A: Swift-XRT refined Analysis
  82. GRB 110610A: Swift/UVOT Upper Limits
  83. GRB 110610A: Enhanced Swift-XRT position
  84. GRB 110610A: Swift-BAT refined analysis
  85. Swift detection of the X-ray afterglow of GRB 110604A
  86. GRB 110610A: Swift detection of a burst
  87. GRB 110604A Detection by IPN Spacecraft and Swift-BAT
  88. GRB 110529A: Suzaku WAM observation of the prompt emission
  89. GMRT detection of GRB 110328A
  90. GRB 110530A: Swift-XRT refined Analysis
  91. GRB 110530A: Swift/UVOT Detection of a Fading Afterglow
  92. GRB 110530A: Enhanced Swift-XRT position
  93. GRB 110530A: NOT optical observations
  94. GRB110530A: MITSuME Okayama Optical Observation
  95. GRB 110530A: Swift-BAT refined analysis
  96. GRB 110529A: Fermi GBM detection
  97. GRB 110530A: Swift detection of a burst with an optical afterglow
  98. LAT Observations of GRB110529A
  99. EVLA afterglow limits on the high z GRB090429B
  100. Swift J1644+57/GRB 110328A, Additional HST Observations

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