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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').
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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"

24600 results found.

  1. Fermi GRB190417.46 Global MASTER-Net observations report
  2. LIGO/Virgo S190412m: TAROT-GRANDMA observation report.
  3. Fermi Trigger 576994194 / GRB 190415173 / : BALROG localization
  4. Fermi GRB190415.17 Global MASTER-Net observations report
  5. LIGO/Virgo S190412m: Palomar Gattini-IR Wide-field Infrared Follow-up
  6. LIGO/Virgo S190412m: Fermi-LAT search for a high-energy gamma-ray counterpart
  7. LIGO/Virgo S190412m: Swift/BAT data search
  8. LIGO/Virgo S190412m: J-GEM optical/NIR follow-up observations
  9. LIGO/Virgo S190412m: Fermi-GBM Observations
  10. LIGO/Virgo S190412m: MAXI/GSC Observations
  11. LIGO-Virgo S190412m: AGILE GRID observations
  12. LIGO/Virgo S190412m: Insight-HXMT/HE observation
  13. LIGO/Virgo S190412m/G329483: ANTARES neutrino search
  14. LIGO-Virgo S190412m: Search for neutrino counterparts with IceCube
  15. LIGO/Virgo S190412m: HAWC follow-up
  16. INTEGRAL prompt observation of S190412m
  17. LIGO-Virgo S190412m: AGILE preliminary analysis
  18. LIGO/Virgo S190412m: MASTER early alert observation
  19. LIGO/Virgo S190412m: Identification of a GW binary merger candidate
  20. LIGO/Virgo S190408an: GROND Observations of MASTER OT J154209.55-431742.2
  21. IceCube-190331A: Swift-XRT Follow-up Observations
  22. LIGO/Virgo S190408an: MAXI/GSC Observations
  23. GRB 190404C: MITSuME Akeno and Okayama optical upper limits
  24. LIGO/Virgo S190408an: CALET Observations
  25. LIGO/Virgo S190408an: HMT optical observations
  26. LIGO/Virgo S190408an: MASTER 3 OT's more detection
  27. Konus-Wind observation of GRB 190404B
  28. LIGO/Virgo ST190408an: Fermi-LAT search for a high-energy gamma-ray counterpart
  29. GRB 190409A: Swift detection of a possible burst
  30. LIGO-Virgo S190408an: further AGILE GRID observations after T0
  31. LIGO/Virgo S190408an: SAGUARO follow-up observations
  32. LIGO/Virgo S190408an: MASTER OT is 27 day old ATLAS SN candidate and unrelated
  33. LIGO/Virgo S190408an: Insight-HXMT/HE observation
  34. LIGO/Virgo S190408an: Swift/BAT data search
  35. LIGO-Virgo S190408an: AGILE GRID observations
  36. LIGO/Virgo S190408an: MASTER Global Robotic Net optical observations
  37. LIGO/Virgo S190408an: Identification of a GW binary merger candidate
  38. Search for neutrino counterparts to GW candidate S190408an with IceCube
  39. LIGO-Virgo S190408an: HAWC follow-up
  40. INTEGRAL observation of S190408an
  41. LIGO/Virgo S190408an: Fermi GBM Observation
  42. LIGO-Virgo S190408an: AGILE MCAL observations
  43. Fermi TriggNum 576054086 (GRB 1904204.29) / MASTER OT J071404.52+550304.2: CrAO optical observations
  44. Fermi Trigger 576356086 / GRB 190407788 / : BALROG localization
  45. Hard Fermi GRB190404.29/TriggNum576054086: MASTER optical counterpart discovery near PGC020455
  46. Fermi Trigger 576346051 / GRB 190407672 / GRB 190407A: BALROG localization
  47. GRB 190404B: CALET Gamma-Ray Burst Monitor detection
  48. GRB 190404C: Swift-XRT observations
  49. Swift GRB 190331B: Further Swift-XRT observations
  50. GRB 190330A: MITSuME Akeno and Okayama optical upper limits
  51. LIGO/Virgo: Announcing the start of Observing Run 3 (O3) and the beginning of the public gravitational-wave alert era
  52. Konus-Wind observation of GRB 190329A
  53. GRB 190331B: Swift observations of a ground-detected burst
  54. Fermi-LAT Gamma-ray Observations of IceCube-190331A
  55. Search for additional neutrino events from the direction of IceCube-190331A with IceCube
  56. IceCube-190331A: MASTER optical follow-up observations
  57. GRB 190331A: Fermi GBM detection
  58. GRB 190331A, Swift-BAT refined analysis
  59. IPN Triangulation of GRB 190329A (long/bright)
  60. IceCube-190331A - IceCube observation of a high-energy neutrino candidate event
  61. GRB 190331A: Swift detection of a burst
  62. Fermi Trigger 575656777 / GRB 190330694 / GRB 190330A: BALROG localization
  63. GRB 190326A: Swift-BAT refined analysis - a soft-short GRB or an SGR
  64. GRB 190326A: MITSuME Okayama optical upper limits
  65. Konus-Wind observation of GRB 190324A
  66. GRB 190326B: Fermi GBM detection
  67. Fermi Trigger 575278303 / GRB 190326314 / GRB190326B: BALROG localization
  68. GRB 190326A: Swift detection of a short burst
  69. Fermi Trigger 575251142 / GRB 190325999 / GRB 190325A: BALROG localization
  70. GRB 190324A: Swift-BAT refined analysis
  71. GRB190324A: MASTER OT observations
  72. GRB 190324A: Fermi GBM observation
  73. Further Chandra observations of GW170817 ~581-583 days since merger
  74. GRB 190324A: VLT/X-shooter redshift
  75. SWIFT GRB190324.95 Global MASTER-Net observations report
  76. Fermi Trigger 575160247 / GRB 190324947: BALROG localization
  77. GRB 190324A: Swift detection of a burst
  78. Fermi Trigger 575108474 / GRB 190324348: BALROG localization
  79. SWIFT GRB190323.85 Global MASTER-Net observations report
  80. Fermi Trigger 575067924 / GRB 190323879: BALROG localization
  81. Swift detection of LS I +61 303
  82. Fermi Trigger 575018216 / GRB 190323303: BALROG localization
  83. Fermi Trigger 574850558 / GRB 190321363: BALROG localization
  84. GRB 190320A: Swift-BAT refined analysis
  85. GRB190320A: MASTER GRB counterpart decay
  86. GRB 190320A: Fermi GBM observation
  87. SWIFT GRB190320.05 Global MASTER-Net observations report
  88. GRB 190320A: Swift-XRT observations
  89. GRB 190320A: Swift detection of a burst
  90. Fermi Trigger 574678842 / GRB 190319375: BALROG localization
  91. Fermi Trigger 574676902 / GRB 190319353: BALROG localization
  92. Fermi Trigger 574345067 / GRB 190315512: BALROG localization
  93. GRB190311A: MITSuME Akeno optical observation
  94. Fermi trigger 574140965 / GRB190313.15: MASTER Global Robotic Net optical observation
  95. GRB 190311A: Swift-BAT refined analysis
  96. GRB190305A: MASTER Global Robotic Net optical observation
  97. GRB190311A: OAO observations
  98. Fermi Trigger 574080135 / GRB 190312446: BALROG localization
  99. Improved Fermi/GBM GRB localizations
  100. GRB 190311A: Fermi GBM observation

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