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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"

45778 results found.

  1. GRB 140818B: TShAO optical upper limit
  2. GRB 140903A: ISON-Kislovodsk observations
  3. GRB 140903A: MAXI/GSC upper limit
  4. GRB 140903A: 6 GHz VLA detection
  5. GRB 140903A: Pan STARRS images of the field
  6. GRB 140901B: Fermi GBM detection
  7. GRB 140903A: tentative spectroscopic redshift
  8. GRB 140901B found in ground analysis of BAT data
  9. GRB 140903A: Swift/UVOT Upper Limits
  10. GRB 140903A: Swift-BAT Spectral lag analysis
  11. GRB 140903A: P60 Optical Observations
  12. GRB140903A: Discovery Channel Telescope Optical Detection
  13. GRB 140903A: Swift-BAT refined analysis
  14. GRB 140903A: Swift-XRT refined Analysis
  15. GRB 140903A: Coincident galaxy cluster in archival images
  16. GRB 140903A: Confirmed Swift detection of a short burst
  17. GRB 140903A: Preliminary Swift/XRT localization
  18. GRB 140903A: Swift detection of a possible burst
  19. GRB 140901A: Fermi GBM detection
  20. IPN Triangulation of GRB 140901A (short/hard/very intense)
  21. GRB 140831A: iPTF observations of a possible short burst detected by Fermi GBM
  22. GRB 140829A: Fermi GBM Detection
  23. GRB 140829A: iPTF optical observations
  24. GRB140818B, the review of the sky area in plate archives
  25. GRB 140828A, Swift-BAT refined analysis
  26. Konus-Wind observation of GRB 140825A
  27. GRB 140828A: Fermi GBM observation
  28. Swift Mission Operations Center Fully Operational
  29. IPN Triangulation of GRB 140825A (very intense/long)
  30. GRB 140828A: Swift detection of a burst
  31. IPN Triangulation of GRB 140824B
  32. Swift Burst Response Reenabled
  33. GRB 140818B: TLS observations
  34. GRB 140824A: optical upper limit in CrAO
  35. GRB 140824B: Swift observations
  36. Fermi TRIGGER_NUM 430645968: MASTER OT inside error box
  37. Swift Mission Operations Center Moving Tomorrow
  38. GRB 140824B: Fermi GBM Detection
  39. GRB 140821A: Fermi GBM Detection
  40. Fermi TRIGGER_NUM 430583595: MASTER OT 20 hours later
  41. Fermi TRIGGER_NUM 430583595: MASTER OT JR011101.13+603337.5 detection
  42. GRB 140824A: NOT optical upper limits
  43. GRB 140824A: OSN optical limit
  44. GRB 140824A: Swift-XRT refined Analysis
  45. GRB 140824A: Swift-BAT refined analysis
  46. GRB 140824A: Enhanced Swift-XRT position
  47. GRB 140824A: MITSuME Ishigakijima upper limits
  48. GRB 140824A: Swift/UVOT Upper Limits
  49. GRB 140824A: Swift detection of a burst
  50. GRB 140817A: NOT optical observations
  51. Fermi GBM Trigger 140819576/ 430148973/ MASTER OT
  52. GRB 140817A: Khureltogot optical upper limit
  53. GRB 140818B: ISON-Kislovodsk and ISON-Burakan optical upper limit
  54. Fermi trigger 430148973: Swift-XRT observation
  55. GRB 140818A: GROND confirmation of afterglow candidate
  56. GRB 140808A/iPTF14eag: AMI 15 GHz detection
  57. GRB140819A: Deep GROND Upper Limits
  58. Fermi 430148973/MASTER candidate: LCO-Sutherland observations
  59. Fermi trigg_num 430148973: OSN I-band observations
  60. GRB 140818B, Swift-BAT refined analysis
  61. Fermi trigg_num 430148973: bright OT inside large error box!
  62. Konus-Wind observation of GRB 140818A
  63. GRB 140818B : Correction to GCN 16713
  64. GRB 140818B: Swift/UVOT Upper Limits
  65. GRB 140818B: Swift-XRT refined Analysis
  66. Radio upper limit on the GRB 140808A with the GMRT
  67. GRB 140818B: Fermi GBM detection
  68. GRB140818B : GROND afterglow candidate
  69. GRB 140818B: Enhanced Swift-XRT position
  70. GRB 140818B: OSN I-band afterglow candidate
  71. GRB 140817A: Swift/UVOT Afterglow Detection
  72. GRB 140818B: Swift detection of a burst
  73. GRB 140818A - Fermi GBM Detection
  74. Swift detection of SAX J1712.6-3739
  75. GRB 140818A: Swift-XRT and UVOT potential afterglow detection
  76. GRB 140818A: Correction to GCN 16702
  77. Konus-Wind observation of GRB 140817A
  78. GRB 140818A Tiled Swift observations
  79. GRB 140818A: MAXI/GSC detection
  80. GRB 140817A: Swift-XRT refined Analysis
  81. GRB 140817A: Fermi GBM Detection
  82. GRB 140817A: Swift-BAT refined analysis
  83. GRB 140817A draft circular on nearby galaxy
  84. GRB 140817A: Enhanced Swift-XRT position
  85. GRB 140817A: Swift-XRT position
  86. GRB 140817A: Swift detection of a burst
  87. GRB 140808A / PTFeag: VLA K-band observations
  88. GRB 140815A: GROND afterglow candidate
  89. Swift Trigger 609694 is probably not an astrophysical source
  90. GRB 140815A: Swift-XRT observations
  91. GRB 140815A: A long GRB detected by INTEGRAL
  92. GRB 140814A: Swift-XRT and UVOT observations
  93. GRB 140814A: MASTER optical follow-up inspection
  94. GRB 140814A: Swift-XRT and UVOT observations
  95. GRB 140814A: MAXI/GSC detection
  96. Swift Mission Operations Center Moving
  97. GRB 140808A / iPTF14eag optical follow-up at HCT
  98. IPN triangulation of GRB 140810A
  99. GRB 140808A: Confirmation of the Swift-XRT afterglow
  100. GRB140809A: Fermi GBM observation

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