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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.

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

27272 results found.

  1. GRB 171020A: Continued RATIR Optical and NIR Observation
  2. GRB 171020A: TAROT Calern observatory optical observations
  3. GRB 171020A: Swift/UVOT Upper Limits
  4. GRB 171020A: NOT spectroscopic redshift
  5. GRB 171020A: Swift-BAT refined analysis
  6. GRB 171020A: RATIR Optical and NIR Observations
  7. GRB 171020A: Swift-XRT refined Analysis
  8. GRB 171020A: LT observations
  9. GRB 171020A: Confirmation of OT fading
  10. GRB 171020A: Mini-MegaTORTORA upper limits on simultaneous optical emission
  11. GRB 171020A: NOT optical afterglow detection
  12. GRB 171020A: Swift detection of a burst
  13. Fermi-GBM Detection of possible burst from AXP CXOU J164710.2-455216/PSR J1647-4552
  14. GRB 171011B: Insight-HXMT detection
  15. Trigger 780207: Swift triggers again on AXP CXOU J164710.2-455216/PSR J1647-4552
  16. Swift Trigger on AXP CXOU J164710.2-455216/PSR J1647-4552
  17. GRB 171011B CALET Gamma-Ray Burst Monitor detection
  18. Trigger 779762: Swift detection of Vela X-1
  19. Trigger 779351: Swift detection of Swift J0243.6+6124
  20. Swift trigger 779171 is probably a noise fluctuation
  21. GRB 171010A: RATIR Optical and NIR Observations
  22. BAT trigger 778435 is not a GRB.
  23. GRB 171013A: TAROT Calern observatory optical observations
  24. GRB 171013A: Swift detection of a possible burst
  25. GRB 171011A: Swift-BAT refined analysis
  26. GRB 171010A: Swift/UVOT Detection
  27. GRB 171010A: NOT optical observations
  28. GRB 171010B: Fermi GBM detection
  29. GRB 171011A: TAROT Calern observatory optical observations
  30. GRB 171010B: Swift detection of a burst
  31. GRB 171011A: MASTER-SAAO optical observations
  32. GRB 171011A: Swift detection of a burst
  33. GRB 171010A: Fermi GBM observation
  34. GRB 171010A: LCO 1m telescope observations
  35. GRB171010A: AstroSat CZTI detection
  36. GRB 171010A: optical observations
  37. GRB 171010A: Fermi-LAT detection
  38. GRB 171007A: Swift/UVOT Upper Limits
  39. GRB 171007A: Swift-BAT refined analysis
  40. GRB 171007A: Fermi GBM observation
  41. GRB 171007A: Swift-XRT refined Analysis
  42. GRB 171007A: RATIR Optical and NIR Observations
  43. GRB 171007A: Swift detection of a burst
  44. GRB 171004A: Swift/UVOT Upper Limits
  45. GRB 171004A: Swift-BAT refined analysis
  46. GRB 171004A: Swift-XRT refined Analysis
  47. GRB 171004A: RATIR Optical and NIR Observations
  48. GRB 171004A: Swift detection of a burst
  49. Swift Trigger 775946 is a Galactic transient, not GRB 171003
  50. LIGO/Virgo G299232: LOFAR follow-up
  51. GRB 171003A: LT early optical observations
  52. GRB 171003A: Swift detection of a burst or a Galactic Transient
  53. GRB 171001A: RATIR Optical and NIR Observations
  54. GRB 171001A: Swift-BAT refined analysis
  55. GRB 171001A: Nanshan-0.36m optical afterglow detections
  56. GRB 171001A: Swift-XRT refined Analysis
  57. GRB 171001A: Swift/UVOT Detection
  58. GRB171001A: D50 optical limit
  59. GRB 171001A: Swift detection of a burst
  60. LIGO/VIRGO G299232: AMI-LA Observations of the optical transient Swift J014008.5+343403.6
  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. 3.6m Devasthal Optical Telescope observations of GRB 170428A
  64. Further Swift-XRT observations of IceCube 170922A
  65. Fermi-GBM GRB misclassifications
  66. LIGO/VIRGO G298048: VLA detection of the radio counterpart at 6 GHz
  67. GRB 170728B: Kottamia R-band observation
  68. IceCube-170922A: Swift-XRT observations
  69. LIGO/VIRGO G298048: Latest 3 GHz Detection of Radio Counterpart to SSS17a
  70. GRB 170921B: AstroSat CZTI detection
  71. GRB 170906A: Insight-HXMT detection
  72. GRB 170921C: Insight-HXMT detection
  73. IPN Triangulation of GRB 170921B
  74. GRB 170921A: RATIR Optical Afterglow Detection and NIR Observations
  75. GRB 170921A: Swift/UVOT Upper Limits
  76. GRB 170921A: Swift-BAT refined analysis
  77. GRB 170918A: Insight-HXMT detection
  78. GRB 170921A: LCO 2m telescope observations
  79. LIGO/Virgo G298048: LCO FLOYDS and Gemini Spectroscopy
  80. GRB 170921A: Swift-XRT refined Analysis
  81. GRB 170921A: TAROT Calern observatory optical observations
  82. GRB 170921B: Fermi GBM detection
  83. GRB 170921A: Swift detection of a burst
  84. LIGO/Virgo G298048: SSS17a photometry of CHILESCOPE observatory
  85. Swift trigger 773082 is probably not astrophysical
  86. LIGO/Virgo G298048: TOROS photometry of SSS17a
  87. LIGO/Virgo G298048: Desert Fireball Network simultaneous optical observations of the SSS17a/DLT17ck.
  88. Fermi-GBM GRB misclassifications
  89. GRB 170912C: Insight-HXMT detection
  90. LIGO/Virgo G297595: NIR Observations following GW170814
  91. LIGO/Virgo G297595: PIRATE observations
  92. Fermi GBM trigger 527149931/170915272 is not a GRB
  93. GRB 170906A CALET Gamma-Ray Burst Monitor detection
  94. GRB 170912B: Swift/UVOT Upper Limits
  95. Fermi GBM trigger 526978609/170913289 is not a GRB
  96. GRB 170912B: Swift-BAT refined analysis
  97. LIGO/Virgo G297595: DLT40 follow-up observation
  98. GRB 170912A: Swift-BAT refined analysis
  99. GRB 170912A: Swift-XRT refined Analysis
  100. LIGO/Virgo G299232: Khureltogot observations

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