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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"

21966 results found.

  1. GRB 241107A: GROWTH-India telescope optical upper limit
  2. IceCube Alert 241113.02: Global MASTER-Net observations report
  3. Fermi GRB 241112A: Global MASTER-Net observations report
  4. Fermi-GBM Sub-Threshold Detection of GRB 241112B
  5. GRB 241112B: Optical afterglow detection confirmation in revisiting the Mephisto data
  6. GRB 241112B: Swift-XRT afterglow detection
  7. GRB 241112B: SVOM/VT afterglow detection
  8. GRB 241112B: Mephisto optical upper limits
  9. GRB 241112B: GOTO optical upper limits
  10. GRB 241112B: Swift ToO observations
  11. EP241107a: EP-FXT follow-up observations
  12. LIGO/Virgo/KAGRA S241110br: NED Galaxies in the Localization Volume
  13. LIGO/Virgo/KAGRA S241109bn: ATLAS observations and discovery of the potential counterpart AT2024aawt
  14. Fermi trigger No 752990530: Global MASTER-Net observations report
  15. LIGO/Virgo/KAGRA S241109bn: Upper limits from EP-WXT observations
  16. Fermi trigger No 752878030: Global MASTER-Net observations report
  17. Integral GRB241109.89: Global MASTER-Net observations report
  18. LIGO/Virgo/KAGRA S241109bn: Coverage and upper limits from MAXI/GSC observations
  19. EP241109a: KAIT photometry and 3 m Shane spectroscopy from Lick observatory
  20. LIGO/Virgo/KAGRA S241109bn: Upper limits from Fermi-GBM Observations
  21. LIGO/Virgo/KAGRA S241109bn: Global MASTER-Net observations report
  22. EP241109a: confirmation of a stellar flare by BOOTES-7
  23. EP241109a: EP on-board trigger and autonomous follow-up observation
  24. GRB 241108A: Swift-XRT observations
  25. EP241107A: MASTER optical observations of xray transient
  26. EP241107a: KAIT optical observations
  27. GRB 241108A: Swift ToO observations
  28. GRB 241030A: TESS observations
  29. EP241107a: Kinder optical follow-up observations
  30. GRB 241025A: radio detection with the VLA
  31. EP241107a: AKO Optical Afterglow Follow-Up Observations
  32. EP241107a: GSP detects optical counterpart
  33. EP241107a: Gemini-South spectroscopic confirmation (z = 0.456)
  34. GRB 241105A: EP-FXT follow-up observations
  35. EP241107a: OHP/T193 photometric and spectroscopic observations
  36. GRB 241105a: PRIME near-infrared upper limits
  37. EP241107a: FTW Optical and NIR observations of the optical counterpart
  38. GRB 241105A: ePESSTO+ NTT optical afterglow detection
  39. EP241107a: GIT optical observations
  40. EP241107a: Global MASTER-Net observations report
  41. EP241107a: SVOM/C-GFT optical observations
  42. EP241107a: AKO Optical Afterglow Detection
  43. GRB 241025A: LBT optical observations
  44. GRB241105A: Gemini-South Optical Afterglow Detection
  45. EP241107a: EP on-board trigger and autonomous follow-up observation
  46. GRB 241105A: VLT/FORS2 optical afterglow rapid fading
  47. GRB 241105A: Swift/UVOT Detection
  48. EP241101a: CrAO ZTSH optical observations
  49. GRB 241030A: optical afterglow detection from the INAF Asiago Observatory
  50. GRB 241105A: BOOTES-7 optical detection
  51. GRB 241030A: Mondy optical observations
  52. GRB 241105A: SVOM/VT optical afterglow observations
  53. GRB 241105A: Swift-XRT afterglow detection
  54. GRB 241104A: Swift-XRT observations
  55. GRB 240511A: LCO upper limits
  56. GRB 241105A: Swift ToO observations
  57. GRB 241105A: Swift/BAT-GUANO arcminute localization of a short burst
  58. GRB 241104A: Swift ToO observations
  59. GRB 241104A: NOT optical non-detection
  60. GRB 241105A: GOTO tentative optical counterpart candidate
  61. Fermi GRB 241105A: Global MASTER-Net observations report
  62. GRB 241104A: SVOM/VT optical candidate
  63. GRB 241104A/EP241104a: Optical upper limits with Kinder observations
  64. GRB 241010A: host galaxy redshift z = 0.977
  65. EP241101a NUTTelA-TAO / BSTI Measurements 2024-11-02
  66. GRB 240821A: further radio observations with the VLA
  67. Fermi GRB 241104A: Global MASTER-Net observations report
  68. EP241101a: EP-FXT observations update
  69. EP241103a: GIT optical upper limit
  70. EP241021a: OHP/T193 further optical observations
  71. Fermi trigger No 752365806: Global MASTER-Net observations report
  72. LIGO/Virgo/KAGRA S241102br: OHP/T193 optical observations
  73. EP241103a: GOTO optical upper limit
  74. EP241101a: Possible detection of an optical counterpart with FTW
  75. EP241103a: Swift XRT detection and improved X-ray position
  76. EP241021a: continued SOAR observations
  77. EP241101a: Optical upper limits with Kinder observations
  78. EP241101a: OHP/T193 optical observations
  79. EP241103a: Gemini optical limits
  80. EP241103a: EP observation update
  81. LIGO/Virgo/KAGRA S241102br: MASTER observations and OT detection
  82. LIGO/Virgo/KAGRA S241102br: EP-WXT X-ray follow-up and flux limits
  83. GRB 241030A: Swift-UVOT observations of the optical prompt flare
  84. EP241103a: GSP optical upper limit
  85. EP241103A: LCO optical observations
  86. EP241103a: Global MASTER-Net observations report
  87. EP241103a: an X-ray transient detected by Einstein Probe
  88. GRB 241030A: Rapid release of TESS data.
  89. EP241101a: Global MASTER-Net observations report
  90. LIGO/Virgo/KAGRA S241102br: NED Galaxies in the Localization Volume
  91. Kinder optical follow-up observations of EP241021a, EP241026b, and EP241030a/GRB241030A
  92. GRB241030A: OHP/T193 optical observations
  93. EP241101a: EP-WXT detection of a fast X-ray transient
  94. Swift GRB 241101A: Global MASTER-Net observations report
  95. GRB 241030A/EP241030a: TNOT observations of the optical counterpart
  96. EP241021a: Upper limit from Konus-Wind observations
  97. GRB 241030A: further SAO RAS optical observations
  98. GRB 241030A: Optical Observations via Virtual Telescope Project
  99. EP241021a: Liverpool Telescope optical follow-up observations
  100. GRB 241026A: SAO RAS optical observations

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