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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"

43125 results found.

  1. GRB130514B: MASTER-Net optical observations.
  2. GRB 130514A: RATIR Optical and NIR Observations
  3. GRB 130513A: RATIR Optical and NIR Observations
  4. GRB 130513A: Swift/UVOT Upper Limits
  5. GRB 130514A: Swift/UVOT Upper Limits
  6. GRB 130513A: GROND observations
  7. GRB 130514B: a long GRB detected by INTEGRAL
  8. GRB 130514A: Enhanced Swift-XRT position
  9. GRB 130514A: Swift-BAT refined analysis
  10. GRB 130513A: Swift-XRT detection of the afterglow.
  11. GRB 130514A: GROND optical-NIR afterglow discovery and photo-z
  12. GRB 130514A: P60 Observations
  13. GRB 130514A: Swift detection of a burst
  14. GRB 130427A: Tautenburg 2nd epoch: No break, no clear SN
  15. GRB 130513A: a long GRB detected by INTEGRAL
  16. GRB130508A: MASTER-Net optical observations
  17. GRB 130511A: Swift-XRT refined Analysis
  18. GRB 130511A: Kanata/HOWPol optical observation
  19. GRB 130511A: MITSuME Okayama upper limits
  20. GRB 130511A: Upper limit by Xinglong TNT optical observation
  21. GRB 130511A: Enhanced Swift-XRT position
  22. GRB 130511A: Gemini-North Redshift
  23. GRB 130511A: Swift detection of a burst with an optical counterpart
  24. GRB 130508A: Swift/UVOT Upper Limits
  25. GRB 130508A: MITSuME Akeno upper limits
  26. GRB 130427A: host galaxy observations
  27. GRB 130508A: RATIR Optical and NIR Observations
  28. GRB 130427A: Keck/LRIS Observations
  29. GRB 130508A: Refined Swift-XRT analysis: Correction to GCN 14612
  30. GRB 130508A: MITSuME Okayama upper limits
  31. Fermi Trigger 130507.091 - Detection of a SGR-like Burst
  32. GRB130508A: BOOTES-3 optical limit
  33. GRB 130427A: Ten nights of Skynet/PROMPT/GORT observations
  34. GRB 130508A: Swift detection of a probable burst
  35. GRB 130427A: Continued RATIR Optical and NIR Observations
  36. GRB 130427A, LBT optical spectrum
  37. GRB 130505B: Further Swift observations
  38. GRB 130505A: MITSuME Akeno Optical observation
  39. GRB 130504C: Suzaku WAM observation of the prompt emission
  40. GRB 130504B: Suzaku WAM observation of the prompt emission
  41. GRB 130505A: Suzaku WAM observation of the prompt emission
  42. GRB 130427A, Watcher afterglow detection
  43. GRB 130427A: Excess optical emission consistent with an emerging supernova
  44. GRB 130427A: Amateur observations from Sweden
  45. GRB 130505A: RATIR Optical and NIR Observations
  46. GRB 130505B: Swift Candidate Afterglow
  47. GRB 130505A: Tautenburg afterglow observations
  48. GRB 130427A: Tautenburg afterglow observations
  49. Refined IPN Triangulation of GRB 130502B
  50. GRB 130427A: RHESSI observations
  51. GRB 130505A, Swift-BAT refined analysis
  52. Konus-Wind observation of GRB 130504C
  53. GRB 130505B: MAXI/GSC detection
  54. GRB 130504C: Fermi GBM detection
  55. GRB 130505A: E_iso record retraction
  56. GRB 130427A: correction to GCN 14487
  57. GRB 130505A: correction to GCN 14575
  58. GRB 130505A: Swift-XRT refined Analysis
  59. GRB 130505A: Largest E_iso ever measured
  60. Konus-Wind observation of GRB 130505A
  61. GRB 130504C: Fermi-LAT detection of a burst
  62. Swift/UVOT observations of GRB130505A
  63. GRB 130505A: iTelescope T12 optical observations
  64. GRB 130505A: Xinglong TNT optical observations
  65. GRB 130505A: Enhanced Swift-XRT position
  66. GRB 130505A: MITSuME Okayama Optical Observation
  67. GRB 130505A - Gemini-N/GMOS redshift determination
  68. GRB 130505A: MAXI/GSC detection
  69. Konus-Wind observation of GRB 130504B
  70. GRB 130504A: IAC80 optical candidate
  71. GRB 130505A: Swift detection of a burst with optical afterglow
  72. GRB 130504A: MITSuME Okayama upper limits
  73. IPN Triangulation of GRB 130504B
  74. GRB 130504B: Fermi GBM detection
  75. GRB 130504A: Bassano Bresciano Observatory optical upper limit
  76. GRB 130504A: Enhanced XRT position
  77. GRB 130502B: Suzaku WAM observation of the prompt emission
  78. GRB 130504A: Swift/UVOT Upper Limits
  79. GRB 130502B: Swift-XRT refined Analysis
  80. GRB 130504A, Swift-BAT refined analysis
  81. GRB 130502B: possible TNG counterpart
  82. Trigger 555096: Swift detection of a possible burst
  83. GRB 130502A: Swift-BAT refined analysis
  84. GRB 130427A: Non-observation of VHE emission with HAWC
  85. GRB130502A: MASTER-Net optical observations
  86. GRB 130502A: Swift-XRT refined Analysis
  87. IPN Triangulation of GRB 130502B
  88. GRB 130502A: Fermi GBM detection
  89. GRB 130502B: Swift/UVOT Upper Limits
  90. GRB 130502A: Swift/UVOT Upper Limits
  91. Konus-Wind observation of GRB 130502B
  92. GRB 130502B: P60 Observations
  93. GRB 130502B Swift-XRT observations
  94. GRB 130502A: RATIR Optical and NIR Observations
  95. GRB 130427A: Pan-STARRS 1 optical observations
  96. GRB 130502A: Enhanced Swift-XRT position
  97. GRB 130502A: OSN and IAC80 I-band observations
  98. GRB 130427A: MITSuME Ishigakijima Optical Observation after 5 days
  99. GRB 130502A: z-band observations from GTC
  100. GRB 130502B: Fermi LAT Detection

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