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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"

26483 results found.

  1. GRB 120226A: Fermi-LAT data analysis
  2. IPN Triangulation of GRB 120226A
  3. GRB 120224A: VLT/X-shooter observations
  4. GRB 120226A: Fermi-LAT detection of a burst
  5. GRB 120224A: GROND detection of the afterglow candidate
  6. GRB 120224A: Swift-XRT refined Analysis
  7. GRB 120224A: Swift-BAT refined analysis
  8. GRB 120224A: Enhanced Swift-XRT position
  9. GRB 120224A: Swift detection of a burst
  10. GRB 120219A: 1.23m CAHA optical observations
  11. GRB 120219A, optical observations
  12. GRB 120219A: Swift-XRT refined Analysis
  13. GRB 120219A: Swift-BAT refined analysis
  14. GRB 120219A: Enhanced Swift-XRT position
  15. GRB 120219A: Swift detection of a burst
  16. GRB 120218A: Swift-BAT refined analysis
  17. GRB 120218A: Swift detection of a burst
  18. GRB 120215A: Swift/UVOT Upper Limits
  19. GRB 120215A: Swift-XRT refined Analysis
  20. Fermi GBM detection of an SGR-like burst
  21. GRB 120215A: Enhanced Swift-XRT position
  22. Skynet/PROMPT observations of GRB120215A
  23. GRB 120215A: Swift-BAT refined analysis
  24. GRB 120215A: Swift detection of a burst
  25. GRB 120213A: Swift-XRT refined Analysis
  26. GRB 120212A: Fermi GBM observation
  27. GRB 120213A: Enhanced Swift-XRT position
  28. GRB 120213A: Swift-BAT refined analysis
  29. GRB 120213A: Prompt enhanced Swift-XRT position
  30. GRB 120212A: Swift-XRT refined Analysis
  31. GRB 120213A: Swift detection of a burst
  32. GRB 120212A: Swift-BAT refined analysis
  33. GRB 120212A: Enhanced Swift-XRT position
  34. GRB 120211A: MITSuME Okayama Ks-band Observation
  35. GRB 120212A: Swift/UVOT detection
  36. GRB 120211A: GROND Upper limits
  37. GRB 120212A: Swift detection of a burst
  38. GRB 120211A: Swift-XRT refined Analysis
  39. GRB 120211A: Swift-BAT refined analysis
  40. GRB 120211A: Enhanced Swift-XRT position
  41. GRB 120211A: Swift detection of a burst
  42. LS I +61 303: Swift-BAT refined analysis
  43. GRB 120202A: D50 optical limits
  44. GRB 120202A: GROND observations
  45. GRB 120202A: WHT, Gemini & UKIRT candidate afterglow
  46. GRB 120202A: TAROT Calern observatory optical observations
  47. GRB 120202A: A long GRB detected by INTEGRAL
  48. GRB 111228A: Possible host detected by Swift/UVOT
  49. Konus-Wind observation of GRB 120129A
  50. IPN Triangulation of GRB 120129A (long/intense)
  51. GRB 120127A / P48 Imaging
  52. GRB 120118B: optical upper limit
  53. GRB 120119A: GRT detection of early afterglow
  54. GRB 111225A: optical observations
  55. GRB 120121A: Swift-XRT refined Analysis
  56. GRB 120121A: Swift-BAT refined analysis
  57. GRB 120121A: Enhanced Swift-XRT position
  58. GRB 120121A: Swift detection of a burst
  59. GRB 120119A, Swift-BAT refined analysis
  60. GRB 120119A: TAROT La Silla observatory optical observations
  61. GRB 120118B: RTT150 optical observations
  62. GRB 120119A: Swift-XRT refined Analysis
  63. GRB 120119A: Enhanced Swift-XRT position
  64. GRB 120119A: Fermi GBM observation
  65. GRB 120118B, Swift-BAT refined analysis
  66. Konus-Wind observation of GRB 120119A
  67. GRB 120118B: Swift-XRT refined Analysis
  68. GRB 120119A: PROMPT optical observation of early afterglow
  69. GRB 120119A: Swift detection of a burst with an optical counterpart
  70. GRB 120118B: Enhanced Swift-XRT position
  71. XRF 120118A: early optical limit by "Pi of the Sky"
  72. GRB 120118B: Swift detection of a burst
  73. XRF 120118A: Optical candidate
  74. XRF 120118A: further INTEGRAL analysis
  75. XRF 120118A: an X-Ray Flash detected by INTEGRAL
  76. GRB 120116A: Swift-XRT refined Analysis
  77. GRB 120116A: Enhanced Swift-XRT position
  78. GRB 120116A: Mondy optical observations
  79. GRB 120116A: Swift-BAT refined analysis
  80. GRB 120116A: Bassano Bresciano Observatory optical observations
  81. GRB 120116A: Swift detection of a burst
  82. GRB 120114A found in ground analysis of BAT data
  83. AXP 4U 0142+61: Swift-BAT refined analysis (trigger 511611)
  84. Swift detection of an SGR burst from AXP 4U 0142+61
  85. GRB 120107A: Suzaku WAM observation of the prompt emission
  86. GRB 120107A: Fermi GBM observation
  87. Konus-Wind observation of GRB 120107A
  88. IPN Triangulation of GRB 120107A
  89. GBM trigger 347620337 (GRB 120107A?) : High-energy photon emission in Fermi/LAT data
  90. GRB 120106A: Bassano Bresciano Observatory optical observations
  91. GRB 120106A: Swift-XRT refined Analysis
  92. GRB 120106A: Swift-BAT refined analysis
  93. GRB 120106A: Enhanced Swift-XRT position
  94. GRB 120106A: TAROT Calern observatory optical observations
  95. GRB 120106A: Swift detection of a burst
  96. GRB 111222A: Fermi GBM observations
  97. GRB 111222A: Second Swift observation
  98. GRB 120102A: Fermi GBM observation
  99. Konus-Wind observation of GRB 120102A
  100. GRB 120102A: Swift-BAT refined analysis

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