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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"

12178 results found.

  1. Konus-Wind observation of GRB 140723A
  2. IPN Triangulation of GRB 140723A
  3. GRB 140723A: Fermi-LAT detection
  4. Konus-Wind observation of GRB 140721A
  5. IPN Triangulation of GRB 140721A
  6. GRB 140716A: GROND confirmation of the afterglow
  7. GRB 140719A, Swift-BAT refined analysis
  8. GRB 140719B: Swift detection of a burst
  9. GRB 140719A: Swift detection of a burst
  10. Konus-Wind observation of GRB 140716A
  11. GRB 140716A BAT refined analysis
  12. Swift observations of a flare from UX Ari
  13. Swift detection of UX Ari
  14. GRB 140713A: Swift-XRT refined Analysis
  15. GRB 140713A : Xinglong TNT upper limit
  16. GRB 140713A: T100 observations
  17. GRB 140710A: iTelescope.Net T11 Optical Observation
  18. GRB 140713A: Swift detection of a burst
  19. Fermi GBM Observations of SGR 1935+2154
  20. GRB 140710B: a long GRB detected with INTEGRAL
  21. GRB 140710A: Swift-XRT refined Analysis
  22. GRB 140709B: update of Khureltogot optical upper limit
  23. GRB 140710A: Swift detection of a burst
  24. GRB 140709B: Swift-XRT refined Analysis
  25. GRB 140709B: Swift-BAT refined analysis
  26. GRB 140709B: OSN optical limit
  27. GRB 140709A: BOOTES-2 and OSN optical observations
  28. GRB 140709B: Swift detection of a burst
  29. GRB 140705A: Nishi-Harima NIR upper limits
  30. GRB 140705A / SGR 1935+2154: VLA 6 GHz observations
  31. GRB 140706A: Swift-BAT refined analysis
  32. GRB 140706A: Swift-XRT refined Analysis
  33. Pre-discovery observations of SGR 1935+2154 in Swift archival data
  34. GRB 140705A / SGR 1935+2154: Probable association with supernova remnant G57.2+0.8
  35. SGR 1935+2154: Swift-BAT observations of additional short soft events
  36. GRB 140705A / SGR 1935+2154: FTN observations
  37. GRB 140705A / SGR 1935+2154: Optical observations from 10.4m GTC
  38. GRB 140705A: KAIT Optical Upper Limit
  39. GRB 140705A: Swift-BAT refined analysis of a possible newly discovered SGR 1935+2154
  40. GRB 140703A: Monte Agliale Observatory optical observations
  41. GRB 140703A: MASTER optical observations
  42. GRB 140703A: BOOTES-2 and OSN optical observations
  43. GRB 140629A: SAO RAS monitoring
  44. Fermi 425667201: optical counterpart search
  45. Konus-Wind observation of GRB 140629A
  46. GRB 140629A: Swift/UVOT Detection
  47. GRB 140629A: Swift-XRT refined Analysis
  48. GRB 140629A: MITSuME Ishigakijima Optical Observation
  49. GRB 140629A : Virtual Telescope optical observations
  50. GRB 140628A: Swift-XRT refined Analysis
  51. GRB 140628A: Swift detection of a burst
  52. GRB 140620A / iPTF14cva: TShAO optical observations
  53. Konus-Wind observation of GRB 140621A
  54. Konus-Wind observation of GRB 140619A
  55. GRB 140622A: KAIT Optical Upper Limit
  56. GRB 140620A / iPTF14cva: Konkoly optical observations
  57. GRB 140622A: Swift detection of a short burst
  58. GRB 140606B / iPTF 14bfu: SAO RAS optical observations
  59. Konus-Wind observation of GRB 140619C
  60. GRB 140620A: Swift-XRT observations
  61. GRB 140620A / iPTF14cva: Fermi GBM observations
  62. Fermi 424934131 / iPTF14cva: Discovery and Redshift of Optical Afterglow
  63. GRB 140619A: Swift-BAT refined analysis
  64. GRB 140619B: Fermi-LAT Detection
  65. GRB 140619A: Swift-XRT refined Analysis
  66. GRB 140614C: 1.23m CAHA (+EDIPO) observations
  67. GRB 140614C found in ground analysis of BAT data
  68. GRB 140614B: Swift-XRT refined Analysis
  69. GRB 140614B: Swift detection of a burst
  70. GRB 140614A: GROND afterglow candidate
  71. Konus-Wind observation of GRB 140611A
  72. GRB 140610A: MASTER optical observations
  73. Konus-Wind observation of GRB 140610A
  74. Konus-Wind observation of GRB 140606B
  75. GRB 140606A: BOOTES-2 optical upper limit
  76. Fermi423717114: iPTF optical transient candidates
  77. Swift XRT status update
  78. Konus-Wind observation of GRB 140604A
  79. GRB 140528A: Fermi GBM Detection
  80. Konus-Wind observation of GRB 140529A
  81. Konus-Wind observation of GRB 140528A
  82. IPN Triangulation of GRB 140528A
  83. Chandra late-time observations of GRB140515A
  84. Swift detection of SFXT IGR J17544-2619
  85. GRB 140523A: NOT observation
  86. Konus-Wind observation of GRB 140523A
  87. Swift trigger 599860 probably not real
  88. GRB 140523A: Fermi-LAT detection
  89. GRB 140523A: Fermi GBM detection
  90. GRB 140423A: TShAO optical observations
  91. GRB 140521A: AAO optical observations
  92. GRB 140521A: MASTER optical observations
  93. GRB 140518A: Swift-XRT refined Analysis
  94. GRB 140518A: KAIT optical candidate
  95. GRB 140518A: Swift detection of a burst
  96. GRB 140516A: Swift-XRT refined Analysis
  97. GRB 140516A: MASTER early optical observations
  98. GRB 140516A: ISON-Kislovodsk optical observations
  99. GRB 140516A: Swift detection of a short burst
  100. GRB 140515A: Swift-XRT refined Analysis

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