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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"

24564 results found.

  1. GRB 160712A: GROND observations
  2. GRB 160712A: Skynet R-COP observations
  3. GRB 160712A: Global MASTER-Net optical observation
  4. GRB 160712A: Swift detection of a burst
  5. GRB 160625B: Global MASTER-Crimea prompt optical emission detection (fwd)
  6. GRB 160709A: MASTER early imaging Swift BAT error box
  7. GRB 160709A, Swift-BAT detection and localization
  8. GRB 160709A: Swift-XRT observations
  9. GRB 160709A: Global MASTER Net Fermi GBM Alerts observations
  10. GRB 160709A: Fermi GBM Observations
  11. GRB 160709A: Fermi-LAT detection
  12. GRB 160628A CALET Gamma-Ray Burst Monitor detection
  13. IPN Triangulation of GRB 160702A (short/hard)
  14. GRB 160705B: Swift-BAT refined analysis
  15. GRB 160705B: Swift detection of a burst
  16. GRB 160703A: MITSuME Ishigakijima Optical Observation
  17. GRB 160703A: MITSuME Akeno Optical Observations
  18. Konus-Wind observation of GRB 160703A
  19. GRB 160703A: Swift-BAT refined analysis
  20. GRB 160629A: Swift-XRT afterglow detection
  21. GRB 160630A: Swift-BAT refined analysis
  22. GRB 160629A: Global MASTER Net Prompt OT observations
  23. GRB 160630A: Skynet PROMPT-CTIO observations of the optical afterglow
  24. Konus-Wind observation of GRB 160629A
  25. GRB 160629A: Fermi GBM observation
  26. GRB 160630A: GROND Afterglow Detection
  27. GRB 160629A: a long GBB detected by INTEGRAL
  28. Konus-Wind observation of GRB 160620A
  29. GRB 160625B CALET Gamma-Ray Burst Monitor detection
  30. GRB 160625B: SMARTS optical/IR afterglow observations
  31. Pi of the Sky detection of an optical flash accompanying GRB 160625B
  32. GRB 160625B: Global MASTER-Net prompt optical emission detection
  33. GRB 160625B: TSHAO optical observations
  34. Konus-Wind observation of GRB 160625B
  35. GRB 160625B: Mini-MegaTORTORA detection of bright optical flash simultaneous with LAT event
  36. GRB 160625B: MITSuME Ishigakijima Optical Observation
  37. Swift-BAT refined analysis on the bright event from SGR 1935+2154
  38. IPN Triangulation of GRB 160620A (short/hard)
  39. GRB 160625A: Swift-BAT refined analysis
  40. GRB 160625A: Swift-XRT refined Analysis
  41. GRB 160625B: Fermi GBM refined analysis
  42. GRB 160625B: Fermi-LAT refined analysis
  43. GRB 160625B: Swift-XRT afterglow detection
  44. GRB 160625B: Fermi GBM initial observations
  45. GRB 160625B: Fermi-LAT detection of a bright burst
  46. GRB 160625A - two different events?
  47. GRB 160625A: Swift-XRT observations
  48. GRB 160625A: Swift detection of a burst
  49. GRB 160623A: MITSuME Ishigakijima Optical Observation
  50. GRB 160624A: MITSuME Ishigakijima upper limits
  51. GRB 160624A: Fermi GBM observation
  52. GRB 160624A, Swift-BAT refined analysis
  53. GRB 160624A: Swift detection of a short burst
  54. Swift detection of a dust-scattered halo around GRB 160623A
  55. GROND observations of GRB 160622A/SNR RCW 103/SGR 1617-5103
  56. GRB 160623A: Fermi GBM detection/observation
  57. Konus-Wind observation of GRB 160623A
  58. GRB 160623A / Galactic transient: Fermi-LAT detection
  59. Swift-BAT refined analysis of the recent outburst from SGR 1617-5103 (a.k.a. 1E 161348-5055 and 2E 1613.5-5053)
  60. GRB 160622A: Swift detection of a possible short GRB or a new SGR
  61. More FERMI GBM bursts from the magnetar SGR 1935+2154
  62. LIGO/Virgo G211117 / GW151226: Sky maps and other data available in LOSC
  63. LIGO/Virgo G197392 / LVT151012: Sky maps and other data available in LOSC
  64. LIGO/Virgo G211117/GW151226: serendipitous XMM-Newton slew observations
  65. Konus-Wind observation of GRB 160612A
  66. BAT detection and localization of GRB 160612A
  67. IPN Triangulation of GRB 160612A (short/hard)
  68. GRB 160612A: Fermi GBM detection
  69. GRB 160611A: Swift/UVOT observations
  70. GRB 160611A: Swift-BAT refined analysis
  71. GRB160611.9 MASTER-Net OT detection
  72. GRB 160611A: Swift detection of a burst
  73. SWIFT J174540.2-290037, Swift-BAT refined analysis (trigger 690197)
  74. GRB 160525C: Astrosat CZTI detection
  75. GRB 160508A: Astrosat CZTI detection
  76. SWIFT J174540.2-290037, Swift-BAT refined analysis (trigger 689956)
  77. GRB 160607A CALET Gamma-Ray Burst Monitor detection
  78. Swift detection of SWIFT J174540.2-290037
  79. Swift detection of SWIFT J174540.2-290037
  80. Trigger 689956: Swift detection of a source near the Galactic center
  81. Konus-Wind observation of GRB 160607A
  82. GRB 160607A: Swift-BAT refined analysis
  83. Trigger 689353 (possible transient near Sgr A*), Swift-BAT refined analysis
  84. Trigger 689353: Swift detection of a transient near Sgr A*
  85. GRB 160601A: MITSuME Akeno optical upper limits
  86. GRB 160601A: Swift-BAT refined analysis
  87. GRB160601A: Gemini Imaging
  88. GRB 160601A: GTC observations confirming transient source decay
  89. GRB160601A: Kanata Telescope I- and Ks-bands upper limits
  90. GRB160601A: NOT afterglow confirmation
  91. GRB 160530B CALET Gamma-Ray Burst Monitor detection
  92. GRB 160601A: MITSuME Okayama Ks-band upper-limit
  93. GRB 160530A: Swift follow-up and X-ray afterglow candidate
  94. GRB 160601A: MITSuME Okayama upper limits
  95. GRB 160601A: MASTER-Net observations
  96. GRB 160601A: Swift detection of a short hard burst
  97. Konus-Wind observation of GRB 160530A
  98. IPN Triangulation of GRB 160530A
  99. GRB 160525B: MITSuME Akeno optical upper limits
  100. GRB 160530B: Fermi GBM Detection

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