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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"

12399 results found.

  1. GRB 241218A: Mondy AZT-33IK optical upper limit
  2. EP241217a : Leavitt Observatory optical upper limit
  3. EP241217a: 1.6m Mephisto multi-band optical observations
  4. GRB 241217a/EP241217B: 1.6m Mephisto optical upper limits
  5. GRB 241218A: Swift/UVOT Upper Limits
  6. EP241217a: optical upper limit with the Liverpool Telescope
  7. Konus-Wind detection of GRB 241204A (short/hard)
  8. GRB 241218A: NOT optical upper limits
  9. GRB 241217A / EP241217B: GRANDMA/T1MPicduMidi optical upperlimits
  10. GRB 241217A / EP241217b: Nanshan/HMT optical upper limit
  11. GRB 241217A / EP241217b: NOT optical upper limits
  12. GRB 241218A: REM optical upper limit
  13. GRB 241217A/EP241217b: REM optical/NIR upper limits
  14. EP241217a: REM optical/NIR upper limits
  15. GRB 241218A: NUTTelA-TAO / BSTI Optical Limits
  16. EP241119a: 7DT Optical upper limits
  17. EP241217b: Global MASTER-Net observations report
  18. GRB 241209A: ATCA radio follow-up observations
  19. EP241217a: Xinglong optical follow-up observations
  20. GRB 241218A: LCOGT Optical Upper Limit
  21. EP241217a: Global MASTER-Net observations report
  22. GRB 241217A: GMG Optical Upper Limit
  23. GRB 241218A: Swift detection of a burst
  24. GRB 241217A: Swift-XRT afterglow detection
  25. GRB 241217A: LCO optical upper limit
  26. GRB 241217A: GRANDMA/TAROT optical upperlimits
  27. Konus-Wind detection of GRB 241213A (EP 241213a)
  28. GRB 241215A: Mondy AZT-33IK optical observations
  29. GRB 241212A: Swift-XRT observations
  30. GRB 241215A: Nanshan/HMT optical upper limit
  31. GRB 241215A: Montarrenti Observatory optical upper limit
  32. GRB 241215A: GROWTH-India telescope optical upper limit
  33. Integral GRB241215.58: Global MASTER-Net observations report
  34. GRB 241213B: Swift-XRT observations
  35. GRB 241213A: SVOM/VT optical candidate
  36. GRB 241213A: Swift/UVOT Upper Limits
  37. EP241208a: NOT optical upper limits
  38. GRB 241213A: LCOGT Optical Upper Limits
  39. GRB 241213B: MAXI/GSC detection
  40. GRB 241213A: REM optical/NIR upper limits
  41. GRB241212A: OHP/T193 optical observations
  42. GRB 241213A: SAO RAS optical upper limit
  43. Swift GRB 241213A: Global MASTER-Net observations report
  44. GRB 241212A : SVOM/C-GFT optical upper limit at early phase
  45. GRB 241209B: GRANDMA/TRT upper limit
  46. GRB 241207A: TSHAO Zeiss-1000 optical observations
  47. GRB 241209B: Mondy AZT-33IK and AbAO AS-32 optical observations
  48. GRB 241209D: REM optical/NIR upper limits
  49. EP241208a: Optical upper limit with Kinder observations
  50. GRB 241209A: EP-FXT follow-up observations
  51. EP241208a: Global MASTER-Net observations report
  52. Fermi trigger No 755485387: Global MASTER-Net observations report
  53. GRB 241209A: BOOTES-7 and 2.2m CAHA early optical upper limits
  54. GRB 241209A: COLIBRÍ Optical Upper Limit
  55. Fermi GRB 241209D: Global MASTER-Net observations report
  56. GRB 241209A: GRANDMA/TAROT upper limit
  57. GRB 241209B: BOOTES-5 optical upper limit
  58. Swift GRB 241209D: Global MASTER-Net observations report
  59. Fermi GRB 241209C: Global MASTER-Net observations report
  60. Fermi GRB 241209E: Global MASTER-Net observations report
  61. GRB 241209A: REM optical/NIR observations
  62. Fermi GRB 241209A: Global MASTER-Net observations report
  63. GRB 241209A: GOTO optical upper limits
  64. EP241206a: 1.5m OSN optical limit
  65. GRB 241209A: Swift detection of a short burst
  66. Swift GRB241209.23: Global MASTER-Net observations report
  67. Fermi GRB 241207B: Global MASTER-Net observations report
  68. GRB 241206A: DDOTI Upper Limit on the Afterglow
  69. AT2024adec: X-ray Upper Limits from EP-FXT Observation
  70. AT2024adec: X-ray Upper Limits from EP-FXT Observation
  71. GRB 241207C: MASTER optical observations
  72. Fermi trigger No 755225799: Global MASTER-Net observations report
  73. GRB 241207C: MAXI/GSC detection
  74. Fermi trigger No 755277791: Global MASTER-Net observations report
  75. Fermi GRB 241207A: Global MASTER-Net observations report
  76. EP241206a: Global MASTER-Net observations report
  77. GRB 241206B: GWAC-F50A optical upper limit
  78. Fermi GRB 241206A: Global MASTER-Net observations report
  79. EP241201a: 1.6m Mephisto Optical Upper Limits
  80. GRB 241204A: COLIBRÍ Optical Upper Limit
  81. EP241202b: KAIT optical upper limit
  82. LIGO/Virgo/KAGRA S241125n: gamma-ray upper limits from joint observations by the LST-1 and MAGIC telescopes
  83. GRB 241204A: DDOTI Upper Limits on the Afterglow
  84. Fermi GRB 241204A: Global MASTER-Net observations report
  85. GRB 241128A : RAPAS follow-up observations
  86. EP241202b: Upper limits from Fermi-GBM Observations
  87. EP241202b: Kinder optical counterpart candidate
  88. Konus-Wind detection of GRB 241130A
  89. EP241202b: Global MASTER-Net observations report
  90. EP241201a: BOOTES-5 optical upper limit
  91. EP241201a: NOT optical observations
  92. GRB 241128A: Swift/UVOT Upper Limits
  93. IceCube-241127A: Upper limits from a search for additional neutrino events in IceCube
  94. EP241201a: Global MASTER-Net observations report
  95. Fermi GRB 241201A: Global MASTER-Net observations report
  96. EP241126a: 1.6m Mephisto Optical Upper Limits
  97. Fermi trigger No 754701230: Global MASTER-Net observations report
  98. LIGO/Virgo/KAGRA S241125n: GRANDMA Optical Upper Limits
  99. GRB 241128A: AbAO optical upper limit
  100. Swift GRB 241128A: Global MASTER-Net observations report

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