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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"

11632 results found.

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

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