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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"

5544 results found.

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

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