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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"

45808 results found.

  1. GRB 140614B: Enhanced Swift-XRT position
  2. GRB 140614B: Swift detection of a burst
  3. GRB 140614A: Enhanced Swift-XRT position
  4. GRB 140614A: GROND afterglow candidate
  5. GRB 140614A: Swift detection of a burst
  6. GRB 140611A: Swift-XRT observations
  7. Konus-Wind observation of GRB 140611A
  8. GRB 140610A: Swift-XRT refined Analysis
  9. GRB 140606B / iPTF 14bfu: MOSFIRE NIR imaging
  10. GRB 140611A Detection of a source in BAT ground analysis
  11. GRB 140610A: Fermi GBM Detection
  12. IPN Triangulation of GRB 140611A (short/hard)
  13. GRB 140610A: RATIR Optical and NIR Observations
  14. GRB 140610A: Swift-BAT refined analysis
  15. GRB 140610A: MASTER optical observations
  16. GRB 140610A: Swift/UVOT Upper Limits
  17. Konus-Wind observation of GRB 140610A
  18. Swift/XRT returns to normal observing
  19. GRB140606B: DCT time of observation correction
  20. GRB 140610A: Swift-XRT observations
  21. GRB 140610A: Swift detection of a burst
  22. Konus-Wind observation of GRB 140606B
  23. GRB 140606B: Swift XRT refined analysis
  24. GRB 140521A: AAO optical upper limit
  25. GRB 140606A: AAO optical upper limit
  26. GRB 140607A: Swift-BAT refined analysis
  27. IPN Triangulation of GRB 140606B
  28. GRB 140606B: Swift/UVOT Upper Limits
  29. GRB140606B/iPTF14bfu: Discovery Channel Telescope Optical Detection
  30. GRB 140606B: Swift XRT position
  31. GRB 140606B / Fermi 432717114 / iPTF 14bfu: Keck redshift
  32. GRB 140607A: Swift detection of a burst
  33. GRB 140606B: Fermi GBM detection
  34. Fermi 423717114: Additional P48 and P60 observations
  35. GRB 140606A: BOOTES-2 optical upper limit
  36. Fermi423717114: iPTF optical transient candidates
  37. GRB 140606A: Nanshan optical upper limit
  38. GRB 140606A: Swift/UVOT Upper Limits
  39. GRB 140606A: Swift-XRT upper limits
  40. Swift XRT status update
  41. GRB 140606A: Swift-BAT refined analysis
  42. GRB 140606A: Swift detection of a short hard burst
  43. Swift Trigger 600914 is probably a noise fluctuation
  44. Konus-Wind observation of GRB 140604A
  45. IPN Triangulation of GRB 140604A (short/hard)
  46. Swift XRT is off-line
  47. GRB 140523A: further Swift-XRT observations
  48. GRB 140528A: Fermi GBM Detection
  49. GRB 140529A BAT refined analysis
  50. Konus-Wind observation of GRB 140529A
  51. Konus-Wind observation of GRB 140528A
  52. GRB 140529A: Swift/UVOT Upper Limits
  53. GRB 140529A: Swift-XRT afterglow detection.
  54. GRB 140408A: Withdrawal of afterglow candidate
  55. GRB 140529A found in ground analysis of BAT slew data
  56. IPN Triangulation of GRB 140528A
  57. Chandra late-time observations of GRB140515A
  58. Swift Trigger 600114 in M31: UVOT Observations
  59. Swift trigger 600114 is not an outbursting X-ray source
  60. Swift Trigger 600114: Optical spectroscopy from GTC
  61. Swift Trigger 600114: Preliminary BAT analysis
  62. Swift Trigger 600114 in M31: Archival and Prompt UVOT Imaging
  63. Swift detection of a bright X-ray source in M31
  64. Fermi GBM trigger 422752719/ 140525971 is not a GRB
  65. Swift detection of SFXT IGR J17544-2619
  66. GRB 140523A: NOT observation
  67. Konus-Wind observation of GRB 140523A
  68. IPN Triangulation of GRB 140523A
  69. GRB 140523A: Nanshan optical upper limit
  70. Swift trigger 599860 probably not real
  71. GRB 140523A: possible X-ray afterglow candidate from tiled Swift/XRT observations
  72. GRB 140523A Tiled Swift observations
  73. GRB 140523A: Fermi-LAT detection
  74. GRB 140523A: Fermi GBM detection
  75. GRB 140521A : Xinglong TNT upper limit
  76. GRB 140521A: Fermi GBM Detection
  77. GRB 140423A: TShAO optical observations
  78. GRB 140521A: AAO optical observations
  79. GRB 140521A: Swift-BAT refined analysis
  80. GRB 140521A: AROMA-N Optical Observation
  81. GRB 140521A: MITSuME Okayama upper limits
  82. GRB 140516A: further Swift-XRT analysis
  83. GRB 140521A: MASTER optical observations
  84. GRB 140521A: Swift detection of a burst
  85. GRB 140512A: Redshift from NOT
  86. GRB 140518A: T100 observations
  87. GRB 140518A: Continued RATIR Optical and NIR Observations
  88. GRB 140512A: MASTER prompt and afterglow optical observations
  89. GRB 140518A, Swift-BAT refined analysis
  90. GRB 140518A: Swift-XRT refined Analysis
  91. GRB 140518A: Skynet GORT Detections of the Optical Afterglow
  92. GRB 140518A: Swift/UVOT Upper Limits
  93. GRB 140518A: RATIR Optical and NIR Observations
  94. GRB 140518A: Gemini-N redshift
  95. GRB 140518A: P60 i-/z-band detections
  96. GRB 140518A: KAIT optical candidate
  97. GRB 140518A: Swift detection of a burst
  98. GRB 140516A: RATIR Optical and NIR Observations
  99. GRB 140516A: Subaru NIR imaging observations
  100. GRB 140516A: 6 GHz upper limit

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