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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"

24485 results found.

  1. Fermi GRB 241112A: Global MASTER-Net observations report
  2. Fermi-GBM Sub-Threshold Detection of GRB 241112B
  3. GRB 241112B: Optical afterglow detection confirmation in revisiting the Mephisto data
  4. GRB 241112B: Swift-XRT afterglow detection
  5. GRB 241112B: LCO optical detection of the SVOM/VT candidate
  6. GRB 241107A: Swift/BAT candidate arcminute localization of a short burst
  7. GRB 241112B: Mephisto optical upper limits
  8. GRB 241112B : detection of a long GRB by SVOM/ECLAIRs
  9. GRB 241107A: INTEGRAL IBIS localization
  10. GRB 241112A: Fermi GBM Final Real-time Localization
  11. LIGO/Virgo/KAGRA S241110br: NED Galaxies in the Localization Volume
  12. LIGO/Virgo/KAGRA S241109bn: ATLAS observations and discovery of the potential counterpart AT2024aawt
  13. LIGO/Virgo/KAGRA S241111bn: Identification of a GW compact binary merger candidate
  14. IPN triangulation of GRB 241107A (short/hard)
  15. GRB 241025C: VZLUSAT-2 detection
  16. GRB 241025A: VZLUSAT-2 detection
  17. GRB 241018A: cubesat Avion detection
  18. Fermi trigger No 752990530: Global MASTER-Net observations report
  19. GRB 241111A: Fermi GBM Final Real-time Localization
  20. GRB 241030B: TESS detection of optical counterpart
  21. LIGO/Virgo/KAGRA S241110br: Updated Sky localization
  22. LIGO/Virgo/KAGRA S241110bk: 1 counterpart neutrino candidate event from an IceCube neutrino search
  23. LIGO/Virgo/KAGRA S241110br: Identification of a GW compact binary merger candidate
  24. LIGO/Virgo/KAGRA S241109bn: Upper limits from EP-WXT observations
  25. Fermi trigger No 752878030: Global MASTER-Net observations report
  26. Integral GRB241109.89: Global MASTER-Net observations report
  27. LIGO/Virgo/KAGRA S241109bn: Coverage and upper limits from MAXI/GSC observations
  28. EP241109a: KAIT photometry and 3 m Shane spectroscopy from Lick observatory
  29. LIGO/Virgo/KAGRA S241109bn: Updated Sky localization and EM Bright Classification
  30. LIGO/Virgo/KAGRA S241109bn: Upper limits from Fermi-GBM Observations
  31. LIGO/Virgo/KAGRA S241109p: Updated Sky localization and Source Classification
  32. LIGO/Virgo/KAGRA S241109bn: Global MASTER-Net observations report
  33. LIGO/Virgo/KAGRA S241109bn: Identification of a GW compact binary merger candidate
  34. EP241109a: confirmation of a stellar flare by BOOTES-7
  35. GRB 241108A: Swift-XRT observations
  36. LIGO/Virgo/KAGRA S241109p: Identification of a GW compact binary merger candidate
  37. EP241107a: KAIT optical observations
  38. GRB 241030A: TESS observations
  39. GRB 241108A : a likely weak long GRB detected by SVOM/ECLAIRs
  40. GRB 241104A: CALET Gamma-Ray Burst Monitor detection
  41. EP241107a: AKO Optical Afterglow Follow-Up Observations
  42. GRB 241107A: SVOM/GRM detection of a short burst
  43. GRB 241105A: SVOM/GRM observation
  44. EP241107a: Global MASTER-Net observations report
  45. EP241107a: SVOM/C-GFT optical observations
  46. GRB241105A: Gemini-South Optical Afterglow Detection
  47. EP241101a: CrAO ZTSH optical observations
  48. GRB 241105A: Swift/BAT-GUANO refined analysis of short burst with extended emission
  49. GRB 241105A: Fermi GBM Observation of a Short Burst with Extended Emission
  50. Konus-Wind detection of GRB 241105A (short with extended emission)
  51. LIGO/Virgo/KAGRA S241106ba: 1 counterpart neutrino candidate event from an IceCube neutrino search
  52. LIGO/Virgo/KAGRA S241102o: 1 counterpart neutrino candidate event from an IceCube neutrino search
  53. Konus-Wind detection of GRB 241021A
  54. GRB 241105A: VLT/FORS2 spectroscopic redshift z = 2.681
  55. GRB 241104A: Fermi GBM Observation
  56. GRB 241105A: Swift/BAT-GUANO arcminute localization of a short burst
  57. GRB 241105A: GOTO tentative optical counterpart candidate
  58. Fermi GRB 241105A: Global MASTER-Net observations report
  59. GRB 241104A: SVOM/VT optical candidate
  60. GRB 241105A: Fermi GBM Final Real-time Localization
  61. GRB 241104A/EP241104a: Optical upper limits with Kinder observations
  62. GRB 241104A: COLIBRÍ Upper Limits on the Optical Counterpart
  63. GRB 241104A: SVOM/GRM observation
  64. EP241104a: EP detection of GRB 241104A X-ray emission
  65. EP241101a NUTTelA-TAO / BSTI Measurements 2024-11-02
  66. GRB 241104A : Detection and localization by SVOM/ECLAIRs
  67. Fermi GRB 241104A: Global MASTER-Net observations report
  68. GRB 241104A: Fermi GBM Final Real-time Localization
  69. GRB 241030A: GRBAlpha detection
  70. EP241101a: EP-FXT observations update
  71. Fermi trigger No 752365806: Global MASTER-Net observations report
  72. LIGO/Virgo/KAGRA S241102cy: Updated Sky localization
  73. LIGO/Virgo/KAGRA S241102br: Updated Sky localization
  74. EP241101a: Possible detection of an optical counterpart with FTW
  75. EP241101a: Optical upper limits with Kinder observations
  76. LIGO/Virgo/KAGRA S241102br: MASTER observations and OT detection
  77. LIGO/Virgo/KAGRA S241102br: EP-WXT X-ray follow-up and flux limits
  78. GRB 241030A: Swift-UVOT observations of the optical prompt flare
  79. EP241103a: Global MASTER-Net observations report
  80. GRB 241030A: Rapid release of TESS data.
  81. EP241101a: Global MASTER-Net observations report
  82. GRB 241029A: GRBAlpha detection
  83. LIGO/Virgo/KAGRA S241101ee: Updated Sky localization
  84. S241102cy: Identification of a GW compact binary merger candidate
  85. LIGO/Virgo/KAGRA S241102br: NED Galaxies in the Localization Volume
  86. LIGO/Virgo/KAGRA S241102br: Identification of a GW compact binary merger candidate
  87. EP241030a: Futher EP-FXT observation of the X-ray Afterglow of GRB 241030A
  88. EP241101a: EP-WXT detection of a fast X-ray transient
  89. Swift GRB 241101A: Global MASTER-Net observations report
  90. GRB 241101A: FRAM-ORM optical limit
  91. LIGO/Virgo/KAGRA S241101ee: Identification of a GW compact binary merger candidate
  92. EP241021a: Upper limit from Konus-Wind observations
  93. GRB 241101A: Swift-BAT refined analysis
  94. GRB 241030A: Optical Observations via Virtual Telescope Project
  95. GRB 241101A: Swift detection of a burst
  96. GRB 241030B: NUTTelA-TAO / BSTI Optical Limits
  97. Fermi trigger No 752083996: Global MASTER-Net observations report
  98. GRB 241030A: Fermi GBM Observation
  99. EP241021a: AMI-LA radio detection
  100. GRB 241030B: LCOGT Optical Upper Limits

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