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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"

5543 results found.

  1. GRB 140814A: Swift-XRT and UVOT observations
  2. GRB 140814A: MAXI/GSC detection
  3. GRB140809A: Fermi GBM observation
  4. Swift trigger 609139 is probably 4U 1850-03
  5. GRB 140801A (FERMI trigger 428612396): MASTER brigth OT discovery
  6. GRB 140730A: Prompt enhanced Swift-XRT position
  7. GRB 140729A: Swift-XRT and UVOT observations
  8. GRB 140723A: LCO-Sutherland optical candidate
  9. Konus-Wind observation of GRB 140721A
  10. IPN Triangulation of GRB 140721A
  11. GRB 140721A: Fermi GBM detection
  12. GRB 140719A: Swift detection of a burst
  13. Swift Trigger 604111 is not a GRB
  14. GRB 140706A: Swift/UVOT Detection
  15. GRB 140706A: Swift-BAT refined analysis
  16. GRB 140703A: AAO optical observations
  17. Pre-discovery observations of SGR 1935+2154 in Swift archival data
  18. GRB 140706A: Enhanced Swift-XRT position
  19. GRB 140706A: Swift detection of a burst with an optical counterpart
  20. GRB 140703A: CARMA 3mm detection
  21. GRB 140703A: P60 observations of a red, slowly-fading afterglow
  22. GRB 140703A: Monte Agliale Observatory optical observations
  23. GRB 140703A: MASTER optical observations
  24. GRB 140629A: SAO RAS monitoring
  25. GRB 140621A: Swift-XRT observations
  26. GRB 140619B: Swift-XRT observations
  27. GRB 140610A: TShAO optical upper limit
  28. Konus-Wind observation of GRB 140611A
  29. IPN Triangulation of GRB 140611A (short/hard)
  30. Konus-Wind observation of GRB 140606B
  31. IPN Triangulation of GRB 140606B
  32. GRB 140606B: Fermi GBM detection
  33. Fermi423717114: iPTF optical transient candidates
  34. GRB 140529A: Swift-XRT afterglow detection.
  35. Konus-Wind observation of GRB 140523A
  36. IPN Triangulation of GRB 140523A
  37. GRB 140523A: Fermi-LAT detection
  38. GRB 140523A: Fermi GBM detection
  39. GRB 140521A: AROMA-N Optical Observation
  40. GRB 140515B: MAXI/GSC detection
  41. GRB 140423A: HCT optical observations
  42. GRB 140508A: Mondy upper limit
  43. GRB140512A : GROND observations
  44. GRB 140509A: Swift/UVOT Detection and photo-z
  45. Konus-Wind observation of GRB 140508A
  46. GRB 140509A: Swift detection of a burst with an optical counterpart
  47. GRB 140508A: iPTF optical transient candidate
  48. IPN triangulation of GRB 140508A
  49. GRB 140508A: Fermi GBM detection
  50. GRB 140501A: Fermi GBM detection
  51. GRB 140430A: VATT Optical Observations
  52. DG CVn: optical observations
  53. GRB 140423A: Nishi-Harima NIR Observations
  54. Swift Trigger 596958 is positionally consistent with V* DG CVn/2XMM J133146.4+291635
  55. GRB 140419A, LOAO R-band observations
  56. GRB 140423A: ISON-MN early photometry and correction to the GCN circ. 16143
  57. GRB 140423A: optical afterglow candidate
  58. GRB 140419A: MITSuME Okayama Optical Observation
  59. GRB 140408A: MITSuME Akeno Optical observation
  60. GRB 140406A: Fermi GBM observation
  61. GRB 140402A: Swift-XRT observations
  62. GRB 140330A: intense and persistent gamma-ray emission detected by AGILE
  63. GRB 140331A: MITSuME Okayama upper limits
  64. GRB 140331A: RATIR Optical and NIR Observations
  65. GRB 140320D: MASTER optical observations
  66. GRB 140329A: Fermi GBM observation of a bright burst
  67. GRB 140320C: Mondy optical observations and afterglow confirmation
  68. GRB 140320A: RATIR Optical and NIR Observations
  69. GRB 140320B: P60 detection of a very red afterglow
  70. GRB 140320C: MASTER optical observations
  71. GRB 140318A: Continued RATIR Optical and NIR Observations
  72. GRB 140318A: Mondy optical limit
  73. GRB 140311B: Mondy optical limit
  74. GRB 140311A: Mondy optical limits
  75. GRB 140318A: RATIR Optical and NIR Detections
  76. GRB140318A: Discovery Channel Telescope Optical Detection
  77. GRB140308A: Suzaku WAM observation of the prompt emission
  78. GRB 140311C: Swift-XRT and UVOT observations
  79. GRB 140311C: MASTER before, during and after trigger optical observations
  80. GRB 140311A: RATIR Optical and NIR Detection
  81. GRB 140311A: Montarrenti Observatory optical upper limit
  82. GRB 140311A: Kottamia I-band observation
  83. Fermi416242156: possible iPTF counterpart
  84. GRB 140311B: RATIR Optical and NIR Observations
  85. GRO J1744-28: Fermi GBM observation
  86. GRB 140311B: Nanshan afterglow detection
  87. GRB 140311B: MASTER early optical observations
  88. GRB 140311A: Nanshan OT detection
  89. GRB 140311A: MASTER early optical observations
  90. Konus-Wind observation of GRB 140308A
  91. IPN Triangulation of GRB 140308A
  92. GRB 140306A: Suzaku WAM observation of the prompt emission
  93. Konus-Wind observation of GRB 140306A
  94. IPN Triangulation of GRB 140306A
  95. GRB 140304A: Continued RATIR Optical and NIR Observations
  96. GRB 140306A: Fermi GBM detection
  97. GRB 140304A: MASTER OT light curve
  98. GRB 140304A: RATIR g-band Dropout
  99. GRB 140304A: Khureltogot optical observations
  100. GRB 140304A: Mondy optical observations

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