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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"

15373 results found.

  1. GRB 171209A: Swift/UVOT Analysis of the burst
  2. GRB 171209A: Enhanced Swift-XRT position
  3. Swift Trigger 796098 is probably a noise peak near M31
  4. LIGO/Virgo GW170817: X-ray observations confirm prediction made from radio data
  5. GRB171205A hyperluminal radio afterglow?
  6. GRB 171205A: Host galaxy photometric properties
  7. Possible blackbody component in the X-ray spectrum of GRB171205A
  8. GRB 171205A: TNG NIR detections
  9. GRB 171205A: LSGT optical afterglow follow-up observation
  10. GRB 171205A: GMG observation
  11. GRB 171205A: Swift-BAT refined analysis
  12. GRB 171205A: RATIR Optical and NIR Observations
  13. GRB 171205A: VLT/X-shooter optical counterpart and spectroscopic observations
  14. GRB 171126A: AstroSat CZTI detection
  15. GRB 171124A: Swift-XRT afterglow detection
  16. Pan-STARRS follow-up of IceCube-171106A
  17. LIGO/Virgo G299232: LOFAR follow-up
  18. GRB 171124A: Insight-HXMT/HE detection
  19. GRB 171126A: Fermi GBM detection
  20. GRB 171124A: AstroSat CZTI detection
  21. INTEGRAL pointed follow-up of IceCube-171106A
  22. GRB 171123A: OSN Upper Limit
  23. GRB 171119A: AstroSat CZTI detection
  24. GRB 171124A: Fermi-LAT detection
  25. GRB 171124A: Swift ToO observations
  26. GRB 171123A: Confirmation of the X-ray afterglow
  27. GRB 171120A: Insight-HXMT detection
  28. Konus-Wind observation of GRB 171119A
  29. GRB 171120A: AstroSat CZTI detection
  30. Konus-Wind observation of GRB 171120A
  31. GRB 171120A: Fermi GBM Detection
  32. GRB 171120A: Fermi-LAT detection
  33. GRB 171115B: Insight-HXMT detection
  34. Fermi-LAT Gamma-ray Observations of IceCube-171106A
  35. GRB 171108B: Insight-HXMT detection
  36. GRB 171112A: Fermi GBM Detection
  37. Konus-Wind observation of GRB 171112A
  38. FACT follow-up of IceCube20171106
  39. Konus-Wind observation of GRB 171108A
  40. GRB 171103A: Insight-HXMT observation
  41. IceCube-171106A: Swift Observations
  42. HAWC follow-up of IceCube-171106A
  43. GRB 171108A: Fermi GBM detection
  44. INTEGRAL observation of IceCube-171106A
  45. Fermi-GBM Trigger 531686417 / 171106778 is not related to ICECUBE-171106A
  46. IceCube-171106A - IceCube observation of a high-energy neutrino candidate
  47. GRB 171103A: AstroSat CZTI detection
  48. Konus-Wind observation of GRB 171103A (short/hard)
  49. GRB 171103A: Fermi GBM observation
  50. Konus-Wind observation of GRB 171102A
  51. GRB 171102B: Nanshan 0.36m and 0.60m optical upper limits
  52. GRB 171102A: Fermi GBM detection
  53. GRB 171102A: Fermi-LAT detection
  54. GRB 171030A: Fermi GBM detection
  55. GRB 171030A: Swift ToO observations
  56. Fermi-GBM triggers due to Swift J0243.6+6124
  57. Swift Trigger 783893: KAIT Optical Observations
  58. Swift Triggers 784159 and 784160 are not bursts
  59. GRB 171022A: Fermi-LAT detection retraction
  60. Konus-Wind observation of GRB 171027A
  61. AMI-LA observations of the new Be X-ray binary Swift J0243.6+6124
  62. Retraction of high energy neutrino candidate IceCube-171028
  63. GRB 171027A: RATIR Confirmation of Fading and Photo-z
  64. GRB 171027A: VLT optical upper limits
  65. GROND observations of GRB 171027A: correction
  66. GRB 171027A: RATIR Detection of a NIR Afterglow Candidate
  67. Konus-Wind observation of GRB 171022A
  68. IPN Triangulation of GRB 171022A
  69. Swift trigger 781740: Further analysis from Swift and Fermi/GBM
  70. Numerous Fermi-GBM Subthreshold Notices are due to Swift J0243.6+6
  71. GRB 171022A: Fermi GBM detection
  72. GRB 171022A: Fermi-LAT detection
  73. GRB 171020A: Correction of alpha in GCN 22031
  74. GRB 171020A: Mini-MegaTORTORA upper limits on simultaneous optical emission
  75. Fermi-GBM Detection of possible burst from AXP CXOU J164710.2-455216/PSR J1647-4552
  76. GRB 171011B: Insight-HXMT detection
  77. Swift Trigger on AXP CXOU J164710.2-455216/PSR J1647-4552
  78. GRB 171010B: Swift-XRT afterglow detection
  79. Search for counterpart to IceCube-171015A with ANTARES
  80. INTEGRAL SPI-ACS observation of IceCube-171015A
  81. IceCube-171015A - IceCube observation of a high-energy neutrino candidate event
  82. GRB 171010A: VLA Observations
  83. GRB 171010A: RATIR Optical and NIR Observations
  84. Konus-Wind observation of GRB 171011B
  85. Konus-Wind observation of GRB 171010A
  86. GRB 171010A: ePESSTO NTT spectroscopic redshift
  87. GRB 171010A: MITSuME Akeno Optical Observation
  88. GRB 171010B: Swift ToO observations
  89. GRB 171010A: Fermi GBM observation
  90. GRB171010A: AstroSat CZTI detection
  91. GRB 171010A: optical observations
  92. GRB 171010A: Swift ToO observations
  93. GRB 171010A: Fermi-LAT detection
  94. LIGO/Virgo G298048: LWA radio observations
  95. GRB 171004A: Correction to RATIR Astrometry and Photometry
  96. LIGO/Virgo G299232: SWASP optical imaging coverage
  97. LIGO/Virgo G299232: MAGIC Cherenkov Telescopes observations
  98. Swift Trigger 775946 is a Galactic transient, not GRB 171003
  99. LIGO/Virgo G299232: LOFAR follow-up
  100. GRB 171001A: Nanshan-0.36m optical afterglow detections

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