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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"

11633 results found.

  1. GRB 171124A: Fermi GBM observation
  2. GRB 171124A: Fermi-LAT detection
  3. GRB 171124A: Swift ToO observations
  4. GRB 171120A: Insight-HXMT detection
  5. IPN Triangulation of GRB 171119A (long)
  6. GRB 171120A: AstroSat CZTI detection
  7. Konus-Wind observation of GRB 171120A
  8. GRB 171120A: Fermi GBM Detection
  9. GRB 171120A: Fermi-LAT detection
  10. Fermi-LAT Gamma-ray Observations of IceCube-171106A
  11. GRB 171112A: Fermi GBM Detection
  12. Konus-Wind observation of GRB 171108A
  13. IPN Triangulation of GRB 171108A (short)
  14. GRB 171103A: Insight-HXMT observation
  15. GRB 171010A: afterglow and SN 2017htp optical observations
  16. GRB 171108A: Fermi GBM detection
  17. Fermi-GBM Trigger 531686417 / 171106778 is not related to ICECUBE-171106A
  18. IceCube-171106A - IceCube observation of a high-energy neutrino candidate
  19. AMON ICECUBE EHE 130214 (close by time to Fermi trigger): MASTER early follow-up observations
  20. GRB 171103A: AstroSat CZTI detection
  21. GRB 171030A: MASTER inspection of the IPN error box of the short GRB.
  22. Konus-Wind observation of GRB 171103A (short/hard)
  23. GRB 171103A: Fermi GBM observation
  24. Fermi GBM detections of Swift J0243.6+6124 and modification of the GBM trigger configuration
  25. Konus-Wind observation of GRB 171102A
  26. IPN Triangulation of GRB 171102A
  27. GRB 171102A: Fermi GBM detection
  28. GRB 171102A: Fermi-LAT detection
  29. GRB 171030A: Fermi GBM detection
  30. GRB 171030A: Swift non-localization with BAT, XRT and UVOT
  31. IPN Triangulation of GRB 171030A (short)
  32. Fermi-GBM triggers due to Swift J0243.6+6124
  33. GRB 171022A: Fermi-LAT detection retraction
  34. AMI-LA observations of the new Be X-ray binary Swift J0243.6+6124
  35. Konus-Wind observation of GRB 171022A
  36. IPN Triangulation of GRB 171022A
  37. GRB 171013B CALET Gamma-Ray Burst Monitor detection
  38. Fermi GBM trigger 530617076/171025401 is not a GRB
  39. Swift trigger 781740: Further analysis from Swift and Fermi/GBM
  40. Numerous Fermi-GBM Subthreshold Notices are due to Swift J0243.6+6
  41. GRB 171022A: Fermi GBM detection
  42. GRB 171022A: Fermi-LAT detection
  43. Fermi GBM Observations of IceCube-171015A
  44. Fermi-GBM Detection of possible burst from AXP CXOU J164710.2-455216/PSR J1647-4552
  45. GRB 171010A: VLA Observations
  46. GRB 171010A: A detection of a radio source by AMI
  47. GRB 171010A : Optical observations from HCT
  48. Konus-Wind observation of GRB 171010A
  49. GRB 171010A: NOT optical observations
  50. GRB 171010B: Fermi GBM detection
  51. GRB 171010B: Swift detection of a burst
  52. GRB 171010A: Fermi GBM observation
  53. GRB 171010A: LCO 1m telescope observations
  54. GRB171010A: AstroSat CZTI detection
  55. GRB 171010A: Swift-XRT afterglow detection
  56. GRB 171010A: optical observations
  57. GRB 171010A: OT, spectrum, and possible host galaxy
  58. GRB 171010A: Swift ToO observations
  59. GRB 171010A: Fermi-LAT detection
  60. GRB 171007A: Fermi GBM observation
  61. Fermi Gamma-ray Burst Monitor trigger 528508320/170930994 is not a GRB
  62. Fermi Gamma-ray Burst Monitor trigger 528330888/170929011 is not a GRB
  63. Further Swift-XRT observations of IceCube 170922A
  64. Fermi-GBM GRB misclassifications
  65. Konus-Wind observation of GRB 170921B
  66. Correction to GCN Circular 21919: GRB 170921C: Insight-HXMT detection
  67. GRB 170921B: AstroSat CZTI detection
  68. GRB 170906A: Insight-HXMT detection
  69. GRB 170921C: Insight-HXMT detection
  70. IPN Triangulation of GRB 170921B
  71. GRB 170921B: Fermi GBM detection
  72. Fermi-GBM GRB misclassifications
  73. GRB 170912C: Insight-HXMT detection
  74. Fermi GBM trigger 527149931/170915272 is not a GRB
  75. Fermi GBM trigger 526978609/170913289 is not a GRB
  76. GRB 170912B: Fermi GBM observations
  77. GRB 170911A: Fermi GBM observation
  78. Konus-Wind observation of GRB 170906A
  79. GRB 170911A: MAXI/GSC detection
  80. GRB 170906A: AstroSat CZTI(Veto) detection
  81. GRB 170830B CALET Gamma-Ray Burst Monitor detection
  82. Fermi-GBM GRB mis-classifications during current Solar activity
  83. GRB 170906B: Fermi GBM detection
  84. GRB 170906A: Fermi GBM detection
  85. GRB 170906A: Fermi-LAT detection
  86. GRB 170903A: Fermi GBM observation
  87. LIGO/Virgo G298389: Fermi GBM Flux Upper Limits
  88. LIGO/Virgo G297595: DECam observations of BBH merger region of interest
  89. LIGO/Virgo G299232/PGWB170825.55: MASTER archive images of the SIWFT/UVOT and MASTER OT J033744.97+723159.0 in NGC1343 galaxy before 25
  90. GRB 170831A: Fermi GBM detection
  91. GRB 170830A: Fermi GBM observation
  92. Konus-Wind observation of GRB 170826A
  93. Konus-Wind observation of GRB 170826B
  94. IPN Triangulation of GRB 170826B
  95. LIGO/Virgo G298048: Konus-Wind observations
  96. GRB 170826B: Insight-HXMT detection
  97. IPN Triangulation of GRB 170827B (short)
  98. IPN Triangulation of GRB 170826A (short)
  99. GRB 170826B: Fermi GBM detection
  100. GRB 170826A: Fermi GBM detection

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