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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"

45766 results found.

  1. GRB 140903A: Swift-BAT refined analysis
  2. GRB 140903A: Swift-XRT refined Analysis
  3. GRB 140903A: Coincident galaxy cluster in archival images
  4. GRB 140903A: Confirmed Swift detection of a short burst
  5. GRB 140903A: Preliminary Swift/XRT localization
  6. GRB 140903A: Swift detection of a possible burst
  7. GRB 140901A: Fermi GBM detection
  8. IPN Triangulation of GRB 140901A (short/hard/very intense)
  9. GRB 140831A: iPTF observations of a possible short burst detected by Fermi GBM
  10. GRB 140829A: Fermi GBM Detection
  11. GRB 140829A: iPTF optical observations
  12. GRB140818B, the review of the sky area in plate archives
  13. GRB 140828A, Swift-BAT refined analysis
  14. Konus-Wind observation of GRB 140825A
  15. GRB 140828A: Fermi GBM observation
  16. Swift Mission Operations Center Fully Operational
  17. IPN Triangulation of GRB 140825A (very intense/long)
  18. GRB 140828A: Swift detection of a burst
  19. IPN Triangulation of GRB 140824B
  20. Swift Burst Response Reenabled
  21. GRB 140818B: TLS observations
  22. GRB 140824A: optical upper limit in CrAO
  23. GRB 140824B: Swift observations
  24. Fermi TRIGGER_NUM 430645968: MASTER OT inside error box
  25. Swift Mission Operations Center Moving Tomorrow
  26. GRB 140824B: Fermi GBM Detection
  27. GRB 140821A: Fermi GBM Detection
  28. Fermi TRIGGER_NUM 430583595: MASTER OT 20 hours later
  29. Fermi TRIGGER_NUM 430583595: MASTER OT JR011101.13+603337.5 detection
  30. GRB 140824A: NOT optical upper limits
  31. GRB 140824A: OSN optical limit
  32. GRB 140824A: Swift-XRT refined Analysis
  33. GRB 140824A: Swift-BAT refined analysis
  34. GRB 140824A: Enhanced Swift-XRT position
  35. GRB 140824A: MITSuME Ishigakijima upper limits
  36. GRB 140824A: Swift/UVOT Upper Limits
  37. GRB 140824A: Swift detection of a burst
  38. GRB 140817A: NOT optical observations
  39. Fermi GBM Trigger 140819576/ 430148973/ MASTER OT
  40. GRB 140817A: Khureltogot optical upper limit
  41. GRB 140818B: ISON-Kislovodsk and ISON-Burakan optical upper limit
  42. Fermi trigger 430148973: Swift-XRT observation
  43. GRB 140818A: GROND confirmation of afterglow candidate
  44. GRB 140808A/iPTF14eag: AMI 15 GHz detection
  45. GRB140819A: Deep GROND Upper Limits
  46. Fermi 430148973/MASTER candidate: LCO-Sutherland observations
  47. Fermi trigg_num 430148973: OSN I-band observations
  48. GRB 140818B, Swift-BAT refined analysis
  49. Fermi trigg_num 430148973: bright OT inside large error box!
  50. Konus-Wind observation of GRB 140818A
  51. GRB 140818B : Correction to GCN 16713
  52. GRB 140818B: Swift/UVOT Upper Limits
  53. GRB 140818B: Swift-XRT refined Analysis
  54. Radio upper limit on the GRB 140808A with the GMRT
  55. GRB 140818B: Fermi GBM detection
  56. GRB140818B : GROND afterglow candidate
  57. GRB 140818B: Enhanced Swift-XRT position
  58. GRB 140818B: OSN I-band afterglow candidate
  59. GRB 140817A: Swift/UVOT Afterglow Detection
  60. GRB 140818B: Swift detection of a burst
  61. GRB 140818A - Fermi GBM Detection
  62. Swift detection of SAX J1712.6-3739
  63. GRB 140818A: Swift-XRT and UVOT potential afterglow detection
  64. GRB 140818A: Correction to GCN 16702
  65. Konus-Wind observation of GRB 140817A
  66. GRB 140818A Tiled Swift observations
  67. GRB 140818A: MAXI/GSC detection
  68. GRB 140817A: Swift-XRT refined Analysis
  69. GRB 140817A: Fermi GBM Detection
  70. GRB 140817A: Swift-BAT refined analysis
  71. GRB 140817A draft circular on nearby galaxy
  72. GRB 140817A: Enhanced Swift-XRT position
  73. GRB 140817A: Swift-XRT position
  74. GRB 140817A: Swift detection of a burst
  75. GRB 140808A / PTFeag: VLA K-band observations
  76. GRB 140815A: GROND afterglow candidate
  77. Swift Trigger 609694 is probably not an astrophysical source
  78. GRB 140815A: Swift-XRT observations
  79. GRB 140815A: A long GRB detected by INTEGRAL
  80. GRB 140814A: Swift-XRT and UVOT observations
  81. GRB 140814A: MASTER optical follow-up inspection
  82. GRB 140814A: Swift-XRT and UVOT observations
  83. GRB 140814A: MAXI/GSC detection
  84. Swift Mission Operations Center Moving
  85. GRB 140808A / iPTF14eag optical follow-up at HCT
  86. IPN triangulation of GRB 140810A
  87. GRB 140808A: Confirmation of the Swift-XRT afterglow
  88. GRB140809A: Fermi GBM observation
  89. GRB 140810A: Fermi GBM observation
  90. Konus-Wind observation of GRB 140810A
  91. GRB140810A: Fermi-LAT detection
  92. Swift trigger 609139 is probably 4U 1850-03
  93. Swift observations of possible GRB 140809A candidate
  94. GRB 140809A : Virtual Telescope optical observations
  95. GRB 140809A (FERMI trigger 429246673): MASTER follow-up inspection
  96. Konus-Wind observation of GRB 140808A
  97. GRB 140808A: Swift/UVOT Upper Limits
  98. GRB 140808A: Redshift from the 10.4m GTC telescope
  99. GRB 140808A: Swift-XRT observations
  100. GRB 140808A: Fermi GBM detection

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