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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"

15360 results found.

  1. GRB 160804A: Fermi GBM observation
  2. Konus-Wind observation of GRB 160802A
  3. GBM Observations of IceCube 160731
  4. GRB 160801A: SAO RAS optical observations
  5. GRB 160802A: Fermi GBM detection
  6. FACT follow-up of IceCube20160731
  7. HAWC follow up of IceCube 160731
  8. GRB160720A: Astrosat CZTI detection
  9. GRB160709A: Astrosat CZTI detection of short GRB
  10. GRB160703A: Astrosat CZTI detection
  11. GBM observation of SGR-like burst from the direction of PSR 1119-6127
  12. Trigger 706396: Swift detection of a short burst from PSR 1119-6127
  13. Konus-Wind observation of short GRB 160726A
  14. GRB 160726A: Fermi GBM observation
  15. Konus-Wind observation of GRB 160720A
  16. GRB 160703, GRB 160705, GRB 160720, SGR1935+2154: First SGRs and GRBs detected by Lomonosov.
  17. GRB 160720A: Fermi GBM detection
  18. Swift Trigger 704327: KAIT Optical Observations
  19. GRB 160623A: afterglow spectroscopy by GTC and independent redshift determination
  20. GRB 160714A: Fermi GBM observation
  21. Konus-Wind observation of GRB 160712A
  22. GRB 160709A, Swift-BAT detection and localization
  23. GRB 160625B: TSHAO optical observations
  24. Konus-Wind observation of GRB 160709A (short/hard)
  25. GRB 160709A: Fermi GBM Observations
  26. GRB 160709A: Fermi-LAT detection
  27. GRB 160709A: Tiled Swift observations
  28. Konus-Wind observation of GRB 160702A (short/hard)
  29. GRB 160623A: Astrosat CZTI detection
  30. GRB 160703A: Swift-XRT afterglow detection
  31. GRB 160703A: MITSuME Ishigakijima Optical Observation
  32. Konus-Wind observation of GRB 160703A
  33. GRB 160629A: Swift-XRT afterglow detection
  34. GRB 160629A: Swift ToO observations
  35. GRB 160630A: Skynet PROMPT-CTIO observations of the optical afterglow
  36. Konus-Wind observation of GRB 160629A
  37. GRB 160625A: GROND upper limits
  38. GRB 160629A: Fermi GBM observation
  39. GRB 160629A: SAO RAS independent OT detection
  40. GRB 160629A: a long GBB detected by INTEGRAL
  41. GRB 160625B: TSHAO optical observations, correction GCN 19619
  42. GRB 160625B: TSHAO optical observations
  43. Konus-Wind observation of GRB 160620A
  44. GRB 160623A: SAO RAS optical observations
  45. Konus-Wind observation of a bright burst from SGR 1935+2154
  46. GRB 160625B: SAO RAS optical observations
  47. GRB 160625B: TSHAO optical observations
  48. Konus-Wind observation of GRB 160625B
  49. GRB 160625B: Mini-MegaTORTORA detection of bright optical flash simultaneous with LAT event
  50. GRB 160625B: RATIR Optical and NIR Observations
  51. GRB 160625B: TNG redshift confirmation
  52. GRB 160625B: VLT/X-shooter redshift
  53. GRB 160625B: MITSuME Ishigakijima Optical Observation
  54. Fermi/GBM observation of a bright burst from magnetar SGR 1935+2154
  55. GRB 160625B: Fermi GBM refined analysis
  56. GRB 160625B: Fermi-LAT refined analysis
  57. GRB 160625B: Tiled Swift observations
  58. GRB 160625B: Fermi GBM initial observations
  59. GRB 160625B: Fermi-LAT detection of a bright burst
  60. GRB 160625A - two different events?
  61. GRB 160623A: MITSuME Ishigakijima Optical Observation
  62. GRB 160624A: Fermi GBM observation
  63. GRB 160623A: RATIR Optical and NIR Observations, Afterglow Confirmation
  64. GRB 160623A: Mondy optical observations
  65. GROND observations of GRB 160622A/SNR RCW 103/SGR 1617-5103
  66. Konus-Wind observation of GRB 160623A
  67. GRB 160623A / Galactic transient: Fermi-LAT detection
  68. GRB 160623A: Swift ToO observations
  69. SGR 1617-5103 (BAT trigger 700791): Enhanced Swift-XRT position.
  70. More FERMI GBM bursts from the magnetar SGR 1935+2154
  71. LIGO/Virgo G211117/GW151226: serendipitous XMM-Newton slew observations
  72. Konus-Wind observation of GRB 160612A
  73. GRB 160612A: Swift ToO observations
  74. GRB 160612A: Fermi GBM detection
  75. GRB 160525C: Astrosat CZTI detection
  76. GRB 160508A: Astrosat CZTI detection
  77. Konus-Wind observation of GRB 160607A
  78. GRB 160530A: further Swift-XRT follow-up observations
  79. Trigger 689353: Swift detection of a transient near Sgr A*
  80. GRB 160601A: GTC observations confirming transient source decay
  81. GRB160601A: NOT afterglow confirmation
  82. Konus-Wind observation of GRB 160530A
  83. IPN Triangulation of GRB 160530A
  84. GRB 160530B: Fermi GBM Detection
  85. GRB 160530A: Tiled Swift observations
  86. GRB 160521B: Swift-XRT afterglow detection
  87. Konus-Wind observation of GRB 160521B
  88. Correction - Fermi/GBM trigger 160523919 is a GRB
  89. GRB 160521B: Theoretical estimate of the redshift and urgent need for further x-ray observations
  90. GRB 160521B: Swift ToO observations
  91. GRB 160521B: Fermi-LAT detection
  92. GRB 160521B: Fermi GBM detection
  93. GRB 160521A: a long GRB detected by INTEGRAL
  94. GRB 160519A: Fermi GBM detection
  95. Konus-Wind observation of a bright burst from SGR 1935+2154
  96. FERMI GBM bursts from the magnetar SGR 1935+2154
  97. GRB 160509A: Further VLA Observations
  98. FACT follow-up of the IceCube event 160427A
  99. Interplanetary Network Search for IceCube 160427A
  100. GRB 160509A: non-observation of VHE emission with HAWC

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