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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"

32710 results found.

  1. Fermi GRB 240605C: Global MASTER-Net observations report
  2. LIGO/Virgo/KAGRA S240601co: Updated Sky localization
  3. IPN triangulation of GRB 240603A
  4. GRB 240529A: SAO RAS optical observations
  5. Swift Trigger 1232755: likely consistent with noise and not astrophysical
  6. Fermi GRB 240603C: Global MASTER-Net observations report
  7. Swift Trigger 1232465: consistent with noise
  8. GRB 240529A: MASTER prompt OT detection
  9. GRB 240529A: continued SAO RAS optical observations
  10. Fermi GRB 240602A: Global MASTER-Net observations report
  11. GRB 240529A: further SAO RAS optical observations
  12. LIGO/Virgo/KAGRA S240601aj: Updated Sky localization
  13. LIGO/Virgo/KAGRA S240601co: Identification of a GW compact binary merger candidate
  14. GRB 240529A: AKO Optical Afterglow Follow-Up Observations
  15. LIGO/Virgo/KAGRA S240530a: Updated Sky localization
  16. LXT 240528A: GSP optical upper limit
  17. GRB 240529A: 1.3m DFOT Optical observations
  18. LIGO/Virgo/KAGRA S240527en: Updated Sky localization
  19. LIGO/Virgo/KAGRA S240601aj: Identification of a GW compact binary merger candidate
  20. GRB 240529A : Mondy optical observations
  21. Konus-Wind detection of GRB 240529A
  22. IPN triangulation of the initial episode of GRB 240529A
  23. GRB 240529A: SAO RAS optical observations
  24. LIGO/Virgo/KAGRA S240531bp: Updated Sky localization
  25. LIGO/Virgo/KAGRA S240531bp: Identification of a GW compact binary merger candidate
  26. GRB 240529A: MAAO 0.7m telescope optical afterglow detection
  27. GRB 240529A: Insight-HXMT/HE detection
  28. GRB 240529A: optical photometry from Konkoly
  29. GRB 240529A: GROWTH-India optical follow-up
  30. GRB 240529A: T193/MISTRAL observations
  31. GRB 240529A: Redshift from GTC/OSIRIS+
  32. GRB 240529A: AKO Optical Afterglow Detection
  33. LIGO/Virgo/KAGRA S240530a: Identification of a GW compact binary merger candidate
  34. GRB 240529A: J-band detections with WINTER
  35. GRB 240529A: Skynet Optical Observations
  36. GRB 240529A: Swift-BAT refined analysis
  37. LIGO/Virgo S240527fv: GRANDMA/FRAM-Auger Optical Observations
  38. GRB 240529A: Swift/UVOT Detection
  39. GRB 240529A: NOT optical observations
  40. GRB 240529A: AstroSat CZTI detection
  41. GRB 240529A: GOTO optical afterglow detection
  42. LIGO/Virgo/KAGRA S240527fv: Updated Sky localization
  43. GRB 240527B: Fermi GBM Observation
  44. Fermi GRB 240527A: Global MASTER-Net observations report
  45. LIGO/Virgo/KAGRA S240527fv: Identification of a GW compact binary merger candidate
  46. GRB 240527B: Fermi-LAT detection
  47. LIGO/Virgo/KAGRA S240527en: Identification of a GW compact binary merger candidate
  48. Fermi GRB 240527B: Global MASTER-Net observations report
  49. GRB 240523A: Swift-BAT refined analysis
  50. LIGO/Virgo/KAGRA S240525p: Updated Sky localization
  51. LIGO/Virgo/KAGRA S240525p: Identification of a GW compact binary merger candidate
  52. GRB 240521B: Fermi GBM Observation
  53. Fermi GBM Sub-Threshold Detection of GRB 240516B
  54. GRB 240513A: Swift-XRT afterglow detection
  55. LIGO/Virgo/KAGRA S240520cv: Updated Sky localization and EM Bright Classification
  56. EP240518a: GSP optical upper limit
  57. LIGO/Virgo/KAGRA S240520cv: Identification of a GW compact binary merger candidate
  58. GRB 240514B: VZLUSAT-2 detection
  59. GRB 240504A: VZLUSAT-2 detection
  60. GRB 240502A: VZLUSAT-2 detection
  61. GRB 240519A: GRBAlpha detection
  62. GRB 240516A: Swift/UVOT Upper Limits
  63. GRB 240519A: AstroSat CZTI detection
  64. EP240518a: possibly identified with a flare star by EP-FXT
  65. LIGO/Virgo/KAGRA S240514c: Updated Sky localization
  66. GRB 240516A: Swift-BAT refined analysis
  67. Fermi GRB 240517A: Global MASTER-Net observations report
  68. GRB 240516A ATCA radio observations
  69. IPN triangulation of GRB 240514B (short)
  70. GRB 240513A: Swift ToO observations
  71. Konus-Wind detection of GRB 240513A
  72. GRB 240516A: AstroSat CZTI detection
  73. GRB 240516A: Swift-XRT refined Analysis
  74. GRB 240514E: A possible candidate BD-21 1074
  75. GRB 240516A: Fermi GBM Observation
  76. GRB 240511A: Observations from GTC/OSIRIS+
  77. GRB 240502C: Zeiss-1000 at Koshka observations of GOTO24bao optical counterpart candidate
  78. GRB 240516A: GOTO optical upper limit
  79. GRB 240514B: AT2024ixa/GOTO24bph is not consistent with the Fermi localisation
  80. GRB 240511A: radio detection of afterglow candidate
  81. GRB 240514B: GOTO candidate optical counterpart
  82. Fermi Gamma-ray Burst Monitor list of triggers that are not a GRB
  83. GRB 240514B: GRBAlpha detection
  84. LIGO/Virgo/KAGRA S240514x: Updated Sky localization
  85. LIGO/Virgo/KAGRA S240515m: Identification of a GW compact binary merger candidate
  86. GRB 240514B: Fermi GBM Detection
  87. GRB 240513A: Fermi GBM observation
  88. LIGO/Virgo/KAGRA S240513ei: Updated Sky localization
  89. LIGO/Virgo/KAGRA S240514x: Identification of a GW compact binary merger candidate
  90. LIGO/Virgo/KAGRA S240514c: Identification of a GW compact binary merger candidate
  91. Fermi GRB 240514B: Global MASTER-Net observations report
  92. GRB 240513A: Tiled Swift observations
  93. GRB 240513A: Fermi-LAT detection
  94. LIGO/Virgo/KAGRA S240513ei: Identification of a GW compact binary merger candidate
  95. GRB 240511A: Fermi GBM Observation
  96. GRB 240511A: Swift-BAT refined analysis
  97. Fermi GRB 240513B: Global MASTER-Net observations report
  98. GRB 240511A: J-band observations with WINTER
  99. GRB 240511A : MITSuME Akeno optical upper limits
  100. LIGO/Virgo/KAGRA S240512r: Updated Sky localization and EM Bright Classification

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