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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"

28257 results found.

  1. GRB 160123A: Swift/UVOT Upper Limits
  2. GRB 160123A: Swift-XRT refined Analysis
  3. GRB 160123A: Swift-BAT refined analysis
  4. GRB 160123A: LCOGT-SSO optical upper limit
  5. GRB 160123A: Enhanced Swift-XRT position
  6. GRB 160123A: Swift detection of a burst
  7. GRB 160121A: redshift from the 10.4m GTC
  8. GRB 160121A: RATIR Optical Observations
  9. GRB 160121A: Swift-XRT refined Analysis
  10. GRB 160121A: Swift/UVOT Upper Limits
  11. GRB 160121A: GROND Afterglow observations
  12. GRB 160121A: TSHAO optical afterglow confirmation
  13. GRB 160121A: Swift-BAT refined analysis
  14. GRB 160121A: Enhanced Swift-XRT position
  15. GRB 160121A: 1.8m MOA optical afterglow detection
  16. GRB 160117B: RATIR continued observations
  17. LIGO/VIRGO G184098: Summary of VLA results for iPTF15cyk
  18. GRB 160121A: Swift detection of a burst
  19. Konus-Wind observation of GRB 160119A
  20. GRB 160117A: Swift-XRT afterglow detection
  21. GRB 160117B: further RATIR observations
  22. GRB 160119A: afterglow confirmation from the NOT
  23. GRB160119A: BOOTES-2/TELMA Early Upper Limits
  24. GRB 160119A: Swift/UVOT Upper Limits
  25. LIGO/Virgo G184098: MASTER final result
  26. GRB 160119A: GROND optical/NIR afterglow observations
  27. GRB 160119A: RATIR Optical and NIR Observations
  28. GRB 160117B: RATIR Optical and NIR Observations
  29. GRB 160119A: Swift-BAT refined analysis
  30. GRB 160119A: Swift-XRT refined Analysis
  31. GRB 160119A: Enhanced Swift-XRT position
  32. GRB 160119A: NOT and GTC afterglow candidate
  33. GRB 160117B: Early iTelescope observation
  34. GRB 160119A: Swift detection of a burst
  35. GRB 160117A: Swift/UVOT Upper Limits
  36. GRB 151228B: AbAO optical upper limit
  37. GRB 160104A: ISON-Ussuriysk optical observations
  38. GRB 160117A: Swift-XRT observations
  39. GRB 160117B: GROND optical/NIR afterglow observations
  40. GRB 160117B: Swift-XRT refined Analysis
  41. GRB 160117A: Swift-BAT refined analysis
  42. GRB 160117B: Swift/UVOT Detection
  43. GRB 160117B: Enhanced Swift-XRT position
  44. GRB 160117B: LCOGT-SSO optical observations
  45. GRB 160117B: Swift detection of a burst with optical counterpart
  46. LIGO/Virgo G211117: Preliminary VLA observation summary of PS15dpn
  47. IPN Triangulation of GRB 160113A
  48. LIGO/Virgo G211117: Further Swift-XRT sources
  49. Konus-Wind observation of GRB 160104B
  50. Konus-Wind observation of GRB 160102A
  51. IPN Triangulation of GRB 160111A (short/hard)
  52. GRB 160113A: Swift-XRT observations
  53. GRB 160113A: Fermi GBM detection
  54. GRB 160113A: iPTF P48 Observations and Optical Transient Candidates
  55. GRB 160104A: Swift/UVOT Detection
  56. IPN Triangulation of GRB 151231A
  57. IPN Triangulation of GRB 151229B (extremely intense/long)
  58. LIGO/Virgo G211117: Swift observations of PS15dpn
  59. GRB 160107A: Fermi GBM observation
  60. LIGO/Virgo G211117: Pi of the Sky observations
  61. LIGO/Virgo G211117: VISTA imaging
  62. LIGO/Virgo G211117: Subaru Hyper Suprime-Cam follow-up observation
  63. GRB 160107A: MAXI/GSC detection
  64. IPN Triangulation of GRB 151225A (short/hard)
  65. LIGO/Virgo G211117: Further Swift-XRT sources
  66. GRB 160104A: Nishi-Harima MINT Observations
  67. GRB 160104A: Swift-XRT refined Analysis
  68. GRB 160104A: Swift-BAT refined analysis
  69. GRB 160104A: Fermi GBM observation
  70. GRB 160104A: Mini-GWAC upper limit during prompt emission phase
  71. GRB 160104A: GWAC upper limit during prompt emission phase
  72. GRB 160104A: MITSuME Okayama upper limits
  73. LIGO/Virgo G211117: Summary of Pan-STARRS transients
  74. LIGO/Virgo G211117: INAF TNG follow-up of Kanata telescope candidate
  75. GRB 160104A: Enhanced Swift-XRT position
  76. GRB 160104A: MITSuME Okayama Ks-band upper-limit
  77. GRB 160104B: MAXI/GSC detection
  78. GRB 160104A: LCOGT-FTN afterglow candidate
  79. GRB 160104A: Swift detection of a burst
  80. GRB 160101A: CALET Gamma-Ray Burst Monitor detection
  81. LIGO/Virgo G211117: Gemini classification of 7 Pan-STARRS transients
  82. LIGO/Virgo G211117: LOFAR follow-up
  83. GRB 160102A: Swift-XRT observations
  84. LIGO/Virgo G211117: PESSTO classification of Pan-STARRS transients
  85. GRB 160101A: MITSuME Akeno optical upper limits
  86. LIGO/Virgo G211117: MASTER OTs 26.XII.2015 - 01.I.2016
  87. LIGO/Virgo G211117: CSS/CRTS observations on 29/30 Dec 2015 UT
  88. GRB 160102A: MAXI/GSC detection
  89. GRB 160101B: Fermi-LAT detection
  90. GRB 160101B: Fermi GBM detection
  91. GRB 160101A: Swift/UVOT Detection
  92. GRB 160101A: Fermi GBM observation
  93. GRB 160101A: Swift-XRT afterglow detection
  94. GRB 160101A: MAXI/GSC detection
  95. GRB 151231B: Fermi GBM observation
  96. GRB 151231A: Fermi GBM observation
  97. LIGO/Virgo G211117: 44 transients from Pan-STARRS data during 2015-12-28/30
  98. LIGO/Virgo G211117: MAXI/GSC observations
  99. Trigger 668879: Swift detection of V 404 Cyg again
  100. Trigger 668877: Swift detection of V 404 Cyg

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