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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"

27305 results found.

  1. GRB 190906B: Fermi GBM Final Real-time Localization
  2. GRB 190829A: GTC confirmation of an associated Type Ic-BL Supernova
  3. Fermi trigger No 589419513 Global MASTER-Net observations report
  4. GRB 190905A: Fermi GBM Final Real-time Localization
  5. GRB 180620A: SEDM Observations
  6. Fermi GBM GCN 25668 Retraction
  7. LIGO/Virgo S190901ap : No significant candidates in TAROT-GRANDMA
  8. GRB190829A: Keck LRIS spectroscopic confirmation of the accompanying supernova
  9. LIGO/Virgo S190901ap: No counterpart candidates in KAIT observations
  10. IPN triangulation of GRB 190903A (short)
  11. LIGO/Virgo S190901ap : GRAWITA spectroscopic observation of candidate MASTER OT J171434.95+280725.6
  12. LIGO/Virgo S190901ap: Additional candidates from the Zwicky Transient Facility
  13. LIGO/Virgo S190901ap: GOTO optical coverage and detection of AT2019pjv
  14. GRB190829A: GROND detection of the accompanying SN
  15. LIGO/Virgo S190901ap : GRAWITA photometric observation of candidate ZTFabvizsw and GCN 25618 revision
  16. LIGO/Virgo S190901ap: no counterpart candidate in the SVOM/GWAC observations
  17. LIGO/Virgo S190901ap: Upper limits from CALET observations.
  18. GRB 190901A: Insight-HXMT/HE detection
  19. LIGO/Virgo S190901ap: Upper limits from Insight-HXMT/HE observations
  20. Fermi trigger No 589263065 Global MASTER-Net observations report
  21. GRB 190904A: Fermi GBM Final Real-time Localization
  22. GRB 190829A: LCO Optical Afterglow Detection
  23. LIGO/Virgo S190901ap : SVOM/GWAC-F60A observation of transient ZTFabvizsw
  24. Fermi trigger No 589223981 Global MASTER-Net observations report
  25. GRB 190903A: Fermi GBM detection
  26. LIGO/Virgo S190901ap: Additional observations from the Zwicky Transient Facility
  27. GRB 190903A: Fermi GBM Final Real-time Localization
  28. LIGO/Virgo S190901ap: GROWTH-India follow-up of ZTF19abvionh
  29. LIGO/Virgo S190828l: no counterpart candidate in the SVOM/GWAC observations
  30. LIGO/Virgo S190828j: no counterpart candidate in the SVOM/GWAC observations
  31. LIGO/Virgo S190901ap: No neutrino candidates at Pierre Auger Observatory
  32. LIGO/Virgo S190901ap: No counterpart candidates in Fermi-LAT observations
  33. GRB 190829A: Flattening of optical light curve from continued Liverpool Telescope photometry
  34. LIGO/Virgo S190901ap : GRAWITA spectroscopic observation of candidate ZTFabvixoy
  35. LIGO/Virgo S190901ap : GRAWITA spectroscopic observation of candidate ZTFabvizsw
  36. LIGO/Virgo S190901ap: no counterpart candidates in the Swift/BAT Observations
  37. LIGO/Virgo S190901ap: Candidates from the Zwicky Transient Facility
  38. GRB 190831B: CALET Gamma-Ray Burst Monitor detection of a short burst
  39. LIGO/Virgo S190901ap: Coverage and upper limits from MAXI/GSC observations
  40. LIGO/Virgo S190901ap: Upper limits from Fermi-GBM Observations
  41. LIGO/Virgo S190901ap Global MASTER-Net observations report
  42. Fermi GBM trigger 589060361/190901828 is not a GRB
  43. LIGO/Virgo S190901ap: No counterpart candidates in HAWC observations
  44. Fermi trigger No 589065714 Global MASTER-Net observations report
  45. GRB 190901A: BALROG localization (Fermi Trigger 589065714 / GRB 190901890)
  46. GRB 190901A: Fermi GBM Final Real-time Localization
  47. Fermi trigger No 589060361 Global MASTER-Net observations report
  48. LIGO/Virgo S190814bv : No significant candidates in TAROT-GRANDMA observations
  49. GRB 190829A: Continued fading inferred from Liverpool Telescope photometry
  50. LIGO/Virgo S190828j : No significant candidates in TAROT-GRANDMA observations
  51. LIGO/Virgo S190828l: No significant candidates in TAROT-GRANDMA observations
  52. Fermi trigger No 588962322 Global MASTER-Net observations report
  53. Fermi trigger No 588931056 Global MASTER-Net observations report
  54. GRB 190831A: Fermi GBM Final Real-time Localization
  55. GRB 190829A: Liverpool Telescope optical photometry
  56. GRB 190829A, Swift-BAT refined analysis
  57. GRB 190829A: AGILE ratemeters detection and MCAL upper limits
  58. GRB 190828D: Insight-HXMT/HE detection
  59. GRB 190829A: Fermi GBM detection
  60. GRB 190829A: Fermi-LAT Upper Limits
  61. GRB 190829A:: Global MASTER-net optical clear and polarization observations scheduler and some spiculations
  62. Fermi trigger No 588838851 Global MASTER-Net observations report
  63. GRB 190829A: Swift/UVOT detection of an optical afterglow with a rise
  64. GRB 190829A: GROND detection of the Optical/NIR Afterglow
  65. GRB 190829A: Swift-XRT refined Analysis
  66. GRB 190830B: Fermi GBM Final Real-time Localization
  67. GRB 190830A: Fermi GBM Final Real-time Localization
  68. LIGO/Virgo S190828l: No counterpart candidates in KAIT observations
  69. GRB 190829A:: MASTER-net bright and decay OT detection
  70. LIGO/Virgo S190814bv: Upper limits from a two-week IceCube search for neutrinos from the direction of ASKAP J005547-270433
  71. LIGO/Virgo S190829u Global MASTER-Net observations report
  72. LIGO/Virgo S190829u: Retraction of GW compact binary merger candidate
  73. Fermi trigger No 588801358 Global MASTER-Net observations report
  74. GRB 190829A: Swift detection of a burst consistent with a galaxy at z=0.08
  75. GRB 190829A: Fermi GBM Final Real-time Localization
  76. GRB 190828B: VLT/X-shooter optical afterglow candidate
  77. LIGO/Virgo S190828l: Upper limits from Insight-HXMT/HE observations
  78. GRB 190828B: Swift-XRT refined Analysis
  79. GRB 190828B: Swift/UVOT Upper Limits
  80. LIGO/Virgo S190828l: No counterpart candidates in Fermi-LAT observations
  81. LIGO/Virgo S190828l: No transient candidates in CALET observations
  82. LIGO/Virgo S190828j: No transient candidates in CALET observations
  83. GRB 190828B: Fermi GBM observation
  84. GRB 190828B: Swift-BAT refined analysis
  85. LIGO/Virgo S190828l: no counterpart candidates in the Swift/BAT Observations
  86. LIGO/Virgo S190828j: no counterpart candidates in the Swift/BAT Observations
  87. LIGO/Virgo S190828j: No counterpart candidates in KAIT observations
  88. LIGO/Virgo S190828j: No counterpart candidates in Fermi-LAT observations
  89. Integral GRB190828.78 Global MASTER-Net observations report
  90. LIGO/Virgo S190814bv: Swift UVOT - no new counterpart candidates identified
  91. LIGO/Virgo S190828l: Upper limits from Fermi-GBM Observations
  92. LIGO/Virgo S190828j: Upper limits from Fermi-GBM Observations
  93. GRB 190828C: BALROG localization (Fermi Trigger 588696271 / GRB 190828614)
  94. GRB 190828C: Fermi GBM Final Real-time Localization
  95. Swift GRB190828.54 Global MASTER-Net observations report
  96. GRB 190828B: Swift detection of a burst
  97. GRB 190828B: Fermi GBM Final Real-time Localization
  98. LIGO/Virgo S190828l Global MASTER-Net observations report
  99. LIGO/Virgo S190828l: Coverage and upper limits from MAXI/GSC observations
  100. LIGO/Virgo S190828j: Coverage and upper limits from MAXI/GSC observations

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