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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"

3768 results found.

  1. GRB 170202A: SMARTS optical/IR afterglow observations
  2. Konus-Wind observation of GRB 170202A
  3. GRB 170205A: Swift detection of a burst with an optical counterpart
  4. GRB 170202A: MITSuME Akeno Optical Observation
  5. GRB 170202A: MASTGlobal ER-Net bright OT nonmonotonic light curve
  6. GRB 170202A: Mini-MegaTORTORA upper limits
  7. GRB 170202A: Swift detection of a burst with an optical afterglow
  8. LIGO/Virgo G270580: Las Cumbres Observatory Follow-up Observations
  9. GRB 170127A: GROND Upper limits
  10. Konus-Wind observation of GRB 170126A
  11. GRB 170127B: Swift detection of a short burst
  12. LIGO/Virgo G270580: Pan-STARRS coverage and 124 optical transients
  13. GRB 170121B: MASTER early optical observations of the Swift possible XT
  14. LIGO/Virgo G270580: ATLAS coverage and 4 optical transients
  15. LIGO/Virgo G270580: Mini-MegaTORTORA follow-up observations
  16. GRB 170113A: Swift detection of a burst with an optical counterpart
  17. GRB 170111A: Swift detection of a burst
  18. Trigger 731535: Swift detection of GRS 1716-249/GRO J1719-24/V2293 Oph
  19. LIGO/Virgo G268556: Pan-STARRS1 observations and summary of transient sources
  20. Trigger 731257: Another Swift-BAT detection of GRS 1716-249/GRO J1719-24/V2293 Oph
  21. Trigger 731183: Swift detection of GRS 1716-249/GRO J1719-24/V2293 Oph
  22. LIGO/Virgo G211117 / GW151226: LOFAR follow-up
  23. LIGO/Virgo G268556: observation regions by Project Mini-GWAC of SVOM
  24. GRS 1716-249/GRO J1719-24/V2293 Oph, Swift-BAT refined analysis
  25. GRB 161220A: Swift-BAT refined analysis
  26. IPN Triangulation of GRB 161218B (long/very bright)
  27. GRB 161117A: Swift/UVOT Detection
  28. GRB 161117B: LCO optical observations
  29. GRB 161117A: VLT/X-shooter spectroscopy and redshift
  30. GRB 161117A: Swift detection of a burst with an optical counterpart
  31. GRB 161108A: TSHAO optical observations
  32. GRB 161108A: TAROT Calern observatory optical observations
  33. GRB 160928A: The first GRB detected by POLAR
  34. Konus-Wind observation of GRB 161023A
  35. Konus-Wind observation of GRB 161017A
  36. GRB 161017A: MITSuME Akeno Optical Observation
  37. GRB 161014A: Swift-XRT refined Analysis
  38. GRB 161014A: Swift-BAT refined analysis
  39. GRB 161014A: Swift/UVOT Detection
  40. GRB 161014A: Swift-XRT and UVOT afterglow detection
  41. GRB 161014A : Xinglong TNT optical observation
  42. GRB161014A: optical afterglow candidate with the LCOGT-FTS
  43. GRB 161014A: MITSuME-Akeno optical observation
  44. GRB 161010A: Swift/UVOT Possible Detection
  45. GRB 161007A: MASTER-net early optical observations
  46. GRB 160927A: GTC observations
  47. GRB 161004B: Prompt enhanced Swift-XRT position
  48. GRB 161004A: Swift detection of a burst with a possible optical counterpart
  49. Fermi GBM trigger 496791348/160928900 is not a GRB
  50. GRB160925A / Fermi 496473540: MASTER optical transient confirmation by LCOGT-FTN
  51. GRB160821A: Astrosat CZTI (veto) detection
  52. IPN Triangulation of GRB 160820A (short/hard)
  53. GRB 160816A: TSHAO optical observations
  54. IPN Triangulation of GRB 160806A
  55. GRB 160804A: Swift-BAT refined analysis
  56. GRB 160801A: Swift detection of a burst
  57. HAWC follow up of IceCube 160731
  58. Trigger 706396: Swift detection of a short burst from PSR 1119-6127
  59. Konus-Wind observation of GRB 160720A
  60. GRB 160712A: Global MASTER-Net optical observation
  61. GRB 160628A CALET Gamma-Ray Burst Monitor detection
  62. GRB 160629A: AbAO optical observations
  63. GRB 160703A: Swift-BAT refined analysis
  64. GRB 160629A: AbAO optical observations
  65. GRB 160625B: TSHAO optical observations, correction GCN 19619
  66. IPN Triangulation of GRB 160620A (short/hard)
  67. GRB 160624A: Swift-XRT refined Analysis
  68. GRB 160624A: Swift detection of a short burst
  69. LIGO/Virgo G211117/GW151226: serendipitous XMM-Newton slew observations
  70. IPN Triangulation of GRB 160612A (short/hard)
  71. GRB160611.9 MASTER-Net OT detection
  72. GRB 160601A: AbAO optical observations
  73. FERMI GBM bursts from the magnetar SGR 1935+2154
  74. Trigger 686761: Swift detection of a bright burst from SGR 1935+2154
  75. FACT follow-up of the IceCube event 160427A
  76. GRB 160501A: Swift-BAT refined analysis
  77. MASTER search for counterpart to the IceCube event 67093193 (run 127853)
  78. GRB 160425A MASTER notices: possible host galaxy in the optical error-box
  79. GRB 160425A : MASTER earlier optical observations
  80. LIGO/Virgo G211117: EWE for NOWT of 12 days follow-up of northern sky
  81. GRB 160411A: Fermi GBM detection
  82. GRB 160411A: Swift detection of a short burst
  83. GRB 160410A: Swift/UVOT Detection
  84. GRB 160410A: Enhanced Swift-XRT position
  85. GRB 160410A: GROND optical detection
  86. GRB 160410A: Swift detection of a (possibly-short) burst with an optical counterpart
  87. GRB 160327A: Continued RATIR Optical and NIR Observations
  88. LIGO/Virgo G211117: LOFAR follow-up
  89. GRB 160327A: Swift-BAT refined analysis
  90. Swift detects GX 301-2 in very high state
  91. GRB 160321A: MASTER observations zero Galaxy latitude GRB
  92. Swift Trigger 678197 is a noise fluctuation
  93. LIGO/Virgo G211117: GRAWITA LBT follow-up of PS15dpn
  94. GRB 160303A: BOAO R-band Detection
  95. GRB 160227A: LOAO 1.0m optical detection
  96. GRB 160227A: McDonald 0.8m Detection
  97. GRB 160228A: Mondy optcial observations
  98. GRB 160228A: MASTER-Amur prompt observations
  99. GRB 160227A: AROMA-N Optical Observation
  100. GRB 160228A: optical observations

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