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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').
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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

15269 results found.

  1. IceCube 160806A EHE Neutrino Candidate Event
  2. GRB 160806A: Fermi GBM observation
  3. Konus-Wind observation of GRB 160806A
  4. GRB160802A - Astrosat CZTI detection
  5. Swift Trigger 707545 is likely 4U 1850-03/GS1843-02
  6. GRB 160804A: TSHAO optical observations
  7. GRB 160804A: ISON/UAFO optical observations
  8. GRB 160804A: GROND observations
  9. Search for counterpart to IceCube-160731A with ANTARES
  10. GRB 160804A: Fermi GBM observation
  11. Konus-Wind observation of GRB 160802A
  12. GBM Observations of IceCube 160731
  13. GRB 160801A: SAO RAS optical observations
  14. GRB 160802A: Fermi GBM detection
  15. FACT follow-up of IceCube20160731
  16. HAWC follow up of IceCube 160731
  17. GRB160720A: Astrosat CZTI detection
  18. GRB160709A: Astrosat CZTI detection of short GRB
  19. GRB160703A: Astrosat CZTI detection
  20. GBM observation of SGR-like burst from the direction of PSR 1119-6127
  21. Trigger 706396: Swift detection of a short burst from PSR 1119-6127
  22. Konus-Wind observation of short GRB 160726A
  23. GRB 160726A: Fermi GBM observation
  24. Konus-Wind observation of GRB 160720A
  25. GRB 160703, GRB 160705, GRB 160720, SGR1935+2154: First SGRs and GRBs detected by Lomonosov.
  26. GRB 160720A: Fermi GBM detection
  27. Swift Trigger 704327: KAIT Optical Observations
  28. GRB 160623A: afterglow spectroscopy by GTC and independent redshift determination
  29. GRB 160714A: Fermi GBM observation
  30. Konus-Wind observation of GRB 160712A
  31. GRB 160709A, Swift-BAT detection and localization
  32. GRB 160625B: TSHAO optical observations
  33. Konus-Wind observation of GRB 160709A (short/hard)
  34. GRB 160709A: Fermi GBM Observations
  35. GRB 160709A: Fermi-LAT detection
  36. GRB 160709A: Tiled Swift observations
  37. Konus-Wind observation of GRB 160702A (short/hard)
  38. GRB 160623A: Astrosat CZTI detection
  39. GRB 160703A: Swift-XRT afterglow detection
  40. GRB 160703A: MITSuME Ishigakijima Optical Observation
  41. Konus-Wind observation of GRB 160703A
  42. GRB 160629A: Swift-XRT afterglow detection
  43. GRB 160629A: Swift ToO observations
  44. GRB 160630A: Skynet PROMPT-CTIO observations of the optical afterglow
  45. Konus-Wind observation of GRB 160629A
  46. GRB 160625A: GROND upper limits
  47. GRB 160629A: Fermi GBM observation
  48. GRB 160629A: SAO RAS independent OT detection
  49. GRB 160629A: a long GBB detected by INTEGRAL
  50. GRB 160625B: TSHAO optical observations, correction GCN 19619
  51. GRB 160625B: TSHAO optical observations
  52. Konus-Wind observation of GRB 160620A
  53. GRB 160623A: SAO RAS optical observations
  54. Konus-Wind observation of a bright burst from SGR 1935+2154
  55. GRB 160625B: SAO RAS optical observations
  56. GRB 160625B: TSHAO optical observations
  57. Konus-Wind observation of GRB 160625B
  58. GRB 160625B: Mini-MegaTORTORA detection of bright optical flash simultaneous with LAT event
  59. GRB 160625B: RATIR Optical and NIR Observations
  60. GRB 160625B: TNG redshift confirmation
  61. GRB 160625B: VLT/X-shooter redshift
  62. GRB 160625B: MITSuME Ishigakijima Optical Observation
  63. Fermi/GBM observation of a bright burst from magnetar SGR 1935+2154
  64. GRB 160625B: Fermi GBM refined analysis
  65. GRB 160625B: Fermi-LAT refined analysis
  66. GRB 160625B: Tiled Swift observations
  67. GRB 160625B: Fermi GBM initial observations
  68. GRB 160625B: Fermi-LAT detection of a bright burst
  69. GRB 160625A - two different events?
  70. GRB 160623A: MITSuME Ishigakijima Optical Observation
  71. GRB 160624A: Fermi GBM observation
  72. GRB 160623A: RATIR Optical and NIR Observations, Afterglow Confirmation
  73. GRB 160623A: Mondy optical observations
  74. GROND observations of GRB 160622A/SNR RCW 103/SGR 1617-5103
  75. Konus-Wind observation of GRB 160623A
  76. GRB 160623A / Galactic transient: Fermi-LAT detection
  77. GRB 160623A: Swift ToO observations
  78. SGR 1617-5103 (BAT trigger 700791): Enhanced Swift-XRT position.
  79. More FERMI GBM bursts from the magnetar SGR 1935+2154
  80. LIGO/Virgo G211117/GW151226: serendipitous XMM-Newton slew observations
  81. Konus-Wind observation of GRB 160612A
  82. GRB 160612A: Swift ToO observations
  83. GRB 160612A: Fermi GBM detection
  84. GRB 160525C: Astrosat CZTI detection
  85. GRB 160508A: Astrosat CZTI detection
  86. Konus-Wind observation of GRB 160607A
  87. GRB 160530A: further Swift-XRT follow-up observations
  88. Trigger 689353: Swift detection of a transient near Sgr A*
  89. GRB 160601A: GTC observations confirming transient source decay
  90. GRB160601A: NOT afterglow confirmation
  91. Konus-Wind observation of GRB 160530A
  92. IPN Triangulation of GRB 160530A
  93. GRB 160530B: Fermi GBM Detection
  94. GRB 160530A: Tiled Swift observations
  95. GRB 160521B: Swift-XRT afterglow detection
  96. Konus-Wind observation of GRB 160521B
  97. Correction - Fermi/GBM trigger 160523919 is a GRB
  98. GRB 160521B: Theoretical estimate of the redshift and urgent need for further x-ray observations
  99. GRB 160521B: Swift ToO observations
  100. GRB 160521B: Fermi-LAT detection

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