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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

19662 results found.

  1. GRB 150212A: RATIR Optical and NIR Observations
  2. GRB 150212A: Skynet DSO14/GORT observations
  3. GRB 150212A: Swift-BAT refined analysis
  4. GRB 150212A: No Swift/UVOT detection in initial observation
  5. GRB 150212A: P60 Afterglow Retraction
  6. GRB 150210A: Swift-XRT observations
  7. GRB 150212A: Swift-XRT afterglow detection
  8. GRB150212A: P60 Afterglow Candidate
  9. Konus-Wind observation of GRB 150211A
  10. GRB 150212A: Swift detection of a burst
  11. GRB 150211A iTelescope observation
  12. GRB 150211A: Swift/UVOT Upper Limits
  13. GRB 150211A: Swift-BAT refined analysis
  14. GRB 150211A: KAIT Optical Upper Limit
  15. GRB 150211A: Swift-XRT refined Analysis
  16. GRB 150210A: Tiled Swift observations
  17. GRB 150210A: Fermi-LAT detection
  18. GRB 150211A: RATIR Optical and NIR Observations
  19. GRB 150211A: No afterglow detection in the Swift/UVOT initial observation
  20. GRB 150211A: Swift-XRT observations
  21. GRB 150211A: Swift detection of a burst
  22. GRB 150211A: MASTER early optical observations
  23. GRB 150101B/ Swift J123205.1-105602: Second epoch Chandra observations
  24. GRB 150204A: GROND observations
  25. GRB 150202B: Swift/XRT afterglow confirmation
  26. GRB 150204A: Swift/XRT afterglow confirmation
  27. Konus-Wind observation of GRB 150206A
  28. GRB 150206A: Swift-BAT refined analysis
  29. GRB 150203A iTelescope observation
  30. GRB 150206A: Swift/UVOT Detection
  31. GRB 150206A: Swift-XRT refined Analysis
  32. GRB 150206A: GROND afterglow observations
  33. GRB 150206A: Enhanced Swift-XRT position
  34. Trigger 630047: Swift detection of 1RXS J180408.9-342058
  35. GRB 150206A: Swift detection of a burst with an optical afterglow
  36. GRB 150204A: LCOGT-Sutherland and Siding Springs observations
  37. GRB 150204A: Swift/UVOT Upper Limits
  38. GRB 150203A: Swift-BAT refined analysis
  39. GRB 150204A: Swift-XRT observations
  40. GRB 150204A: Fermi GBM detection
  41. GRB 150204A: Swift ToO observations
  42. GRB 150204A BAT refined analysis
  43. GRB 150202B: Swift XRT/UVOT observations
  44. GRB 150204A found in ground analysis of Swift-BAT data
  45. Swift Trigger 629693 was a noise event
  46. GRB 150203A: RAPTOR Limits Beginning at the Gamma-Ray Emitting Interval
  47. GRB 150202A, Swift-BAT refined analysis
  48. GRB 150203A: Swift/UVOT Upper Limits
  49. GRB 150203A: ISON-NM early optical limit
  50. IPN Triangulation of GRB 150202B
  51. GRB 150203A: Swift-XRT refined Analysis
  52. GRB 150202B: Tiled Swift observations
  53. Swift Trigger 629693: probably not real
  54. GRB 150202A: Swift/UVOT Upper Limits
  55. GRB 150202A: Swift-XRT refined Analysis
  56. GRB 150203A: Fermi GBM observation
  57. GRB 150203A: TAROT La Silla observatory optical observations
  58. GRB 150203A: GROND Upper limits
  59. GRB 150203A: Enhanced Swift-XRT position
  60. GRB 150203A: RATIR Optical and NIR Observations
  61. GRB 150202A: Enhanced Swift-XRT position
  62. GRB 150202A: GROND Upper limits
  63. GRB 150203A: P60 observations
  64. GRB 150203A: KAIT Optical Upper Limit
  65. GRB 150203A: Prompt enhanced Swift-XRT position
  66. GRB 150203A: Swift detection of a burst
  67. GRB 150202A: Swift detection of a burst
  68. GRB 150201A: Swift/UVOT Upper Limits
  69. GRB 150201A, Swift-BAT refined analysis
  70. Konus-Wind observation of GRB 150201A
  71. GRB 150201A: GROND upper limits
  72. GRB 150201A: Swift-XRT refined Analysis
  73. GRB 150201A: Fermi GBM observation
  74. GRB 150201A: Enhanced Swift-XRT position
  75. GRB 150201A: Swift detection of a burst
  76. Swift Trigger 629206 is likely 1RXS J180408.9-342058
  77. GRB 150120B: Khureltogot optical observations
  78. GRB 150123A: MASTER inspection
  79. IPN Triangulation of GRB 150127B
  80. Swift Trigger 628458 likely not astrophysical
  81. GRB 150123A: Swift/UVOT observations
  82. GRB 150123A: Swift-XRT observations
  83. GRB 150120B: Mondy optical observations
  84. GRB 150123A Tiled Swift observations
  85. IPN Triangulation of GRB 150118B (long/intense)
  86. GRB 150120A: ISON-NM early optical limit
  87. GRB 150120B: FTN early optical light curve
  88. GRB 150120B: Swift/UVOT Upper Limits
  89. GRB 150120B, Optical observations
  90. GRB 150120B: GROND Afterglow Detection
  91. GRB 150120A: Swift-XRT refined Analysis
  92. GRB 150120A: KAIT Optical Upper Limit
  93. GRB 150120B: Swift-BAT refined analysis
  94. GRB 150120A: Swift-BAT refined analysis
  95. GRB 150101B/Swift J123205.1-105602: TNG NIR follow-up
  96. GRB 150120B: Swift-XRT refined Analysis
  97. GRB 150120A: Swift/UVOT Upper Limits
  98. GRB 150110B: AMI 15 GHz detection of possible radio counterpart
  99. GRB 150101B/Swift J123205.1-105602, deep VLT observations
  100. GRB 150120B: Enhanced Swift-XRT position

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