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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"

24537 results found.

  1. Konus-Wind observation of GRB 150314A
  2. GRB 150314A: Swift-XRT refined Analysis
  3. GRB 150314A: KAIT Optical Observations
  4. GRB 150314A: P60 observations
  5. GRB 150314A: Redshift from OSIRIS/GTC
  6. GRB 150314A: NOT optical observations
  7. GRB 150314A Swift-BAT refined analysis
  8. GRB 150314A: Fermi GBM observation
  9. GRB 150314A: MITSuME Akeno upper limits
  10. GRB 150314A: Skynet Yerkes-41 Observations of the Optical Afterglow
  11. GRB 150314A: Fermi-LAT detection
  12. GRB 150314A: KAIT Optical Candidate
  13. GRB 150311A: Konus-Wind trigger at 16:16:24 is not a GRB
  14. Konus-Wind observation of GRB 150309A
  15. GRB 150309A: Swift-BAT refined analysis
  16. GRB 150309A: Fermi GBM detection
  17. GRB 150309A: MASTER prompt optical observation
  18. GRB 150309A: Swift detection of a burst
  19. GRB 150305A: a long GRB detected by INTEGRAL
  20. GRB 150305A: Swift XRT confirms weak INTEGRAL event as a new GRB
  21. Chandra X-ray observations of SWIFT J0045.2+4151 (aka Sw J0045 aka GRB 150301C aka p[PFH2005] 622)
  22. GRB 150302A, Swift-BAT refined analysis
  23. GRB 150302A: MITSuME Okayama upper limits
  24. GRB 150301B: LCOGT-Sutherland observations
  25. GRB 150302A: KAIT Optical Upper Limit
  26. GRB 150302A: Swift detection of a burst
  27. GRB 150301B: Fermi GBM detection
  28. GRB 150301B: Swift-BAT refined analysis
  29. GRB 150301B: GROND afterglow observations
  30. GRB 150301A: Swift-BAT refined analysis
  31. GRB 150301B: MASTER early OT detection
  32. GRB 150301C : (Swift trigger 633105) Swift observations
  33. Swift Trigger 633173 is probably not an astrophysical source
  34. GRB 150301A: Fermi GBM observation
  35. Swift-BAT refined analysis of magnetar 4U 0142+61 (Trigger 632888)
  36. GRB 150220A: Fermi GBM observation
  37. GRB 150220A: Swift-XRT observations
  38. Konus-Wind observation of GRB 150220A
  39. IPN Triangulation of GRB 150220A
  40. GRB 150222A: GROND optical afterglow candidate
  41. GRB 150222A: TNG optical observations
  42. GRB 150222A: Swift-BAT refined analysis
  43. SGR 1935+2154: Swift-BAT refined analysis
  44. GRB 150222A: Mondy optical observations
  45. GRB 150222A: MASTER early optical observations
  46. Swift detection of an outburst from SGR 1935+2154
  47. Trigger 631946: Swift detection of H1745-203
  48. GRB 150219A: Fermi GBM observation
  49. GRB 150219A: A long GRB detected by INTEGRAL
  50. GRB 150213B: Swift-BAT refined analysis
  51. GRB 150213B: Tautenburg Afterglow Detection
  52. GRB 150213A: Fermi GBM detection
  53. GRB 150211A: ROTSE-III Upper Optical Limit
  54. GRB 150212A: RATIR Optical and NIR Observations
  55. GRB 150212A: Skynet DSO14/GORT observations
  56. GRB 150212A: Swift-BAT refined analysis
  57. GRB 150212A: MASTER optical observations
  58. GRB 150210A: Swift-XRT observations
  59. GRB 150212A: Swift-XRT afterglow detection
  60. Konus-Wind observation of GRB 150211A
  61. GRB 150212A: Swift detection of a burst
  62. GRB 150210A: MASTER SN detection during LAT error box inspection
  63. GRB 150211A: Swift-BAT refined analysis
  64. GRB 150211A: KAIT Optical Upper Limit
  65. Konus-Wind observation of GRB 150210A
  66. IPN Triangulation of GRB 150210A
  67. GRB 150210A: Fermi-LAT detection
  68. GRB 150211A: Swift detection of a burst
  69. GRB 150211A: MASTER early optical observations
  70. GRB 150210A: Fermi GBM detection
  71. GRB 150202B: Swift/XRT afterglow confirmation
  72. Konus-Wind observation of GRB 150206A
  73. GRB 150206A: Swift-BAT refined analysis
  74. GRB 150206A: Swift-XRT refined Analysis
  75. Konus-Wind observation of GRB 150202B
  76. GRB 150206B: Fermi GBM detection
  77. Trigger 630047: Swift detection of 1RXS J180408.9-342058
  78. GRB 150206B: iPTF Optical Observations
  79. GRB 150204A: LCOGT-Sutherland and Siding Springs observations
  80. GRB 150203A: Swift-BAT refined analysis
  81. GRB 150204A: Swift-XRT observations
  82. GRB 150204A: Fermi GBM detection
  83. GRB 150204A BAT refined analysis
  84. GRB 150202B: Swift XRT/UVOT observations
  85. GRB 150203A: RAPTOR Limits Beginning at the Gamma-Ray Emitting Interval
  86. GRB 150202A, Swift-BAT refined analysis
  87. IPN Triangulation of GRB 150202B
  88. GRB 150203A: MITSuME Okayama upper limits
  89. Swift Trigger 629693: probably not real
  90. GRB 150203A: Fermi GBM observation
  91. GRB 150202B: Fermi GBM detection
  92. GRB 150202B: Fermi-LAT detection
  93. GRB 150203A: P60 observations
  94. GRB 150203A: KAIT Optical Upper Limit
  95. GRB 150202A: Swift detection of a burst
  96. GRB 150201A, Swift-BAT refined analysis
  97. Konus-Wind observation of GRB 150201A
  98. GRB 150201A: Fermi GBM observation
  99. Swift Trigger 629206 is likely 1RXS J180408.9-342058
  100. GRB 150128A: MASTER OT detction during inspection

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