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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"

32766 results found.

  1. EP240618a: Abastumani optical observationsEP240618a
  2. GRB 240615A: NOT optical observations
  3. EP240618a: GRANDMA Optical Upper Limits
  4. EP240618a: TRT optical upper limit
  5. Fermi GRB 240619A: Global MASTER-Net observations report
  6. EP240617a: STEP/T80S optical limits
  7. GRB 240615A: possible transient detection from Wendelstein observations
  8. LIGO/Virgo S240615dg: GRANDMA/FRAM-CTA-N Observations
  9. LIGO/Virgo/KAGRA S240615dg: Updated Sky localization
  10. LIGO/Virgo/KAGRA S240618ah: Updated Sky localization
  11. EP240618a: OHP/T193 MISTRAL i' and Y band upper limits
  12. GRB240615A: 1.3m DFOT optical upper limit
  13. EP240617a is likely a GRB event
  14. LIGO/Virgo/KAGRA S240618ah: Identification of a GW compact binary merger candidate
  15. GRB 240615A: J-band upper limits from WINTER
  16. GRB 240615A: Fermi GBM Observation
  17. LIGO/Virgo/KAGRA S240615ea: Updated Sky localization
  18. GRB 240615A: GECAM detection
  19. X-ray transient EP240414a: Chandra late time observation
  20. GRB 240615A: FLWO-1.2m optical upper limits
  21. Fermi GRB 240616A: Global MASTER-Net observations report
  22. Konus-Wind detection of GRB 240615A (short/hard)
  23. GRB 240615A: GOTO optical upper limits
  24. GRB 240615A: Swift ToO observations
  25. GRB 240615A: Swift/BAT-GUANO arcminute localization of a short burst
  26. LIGO/Virgo/KAGRA S240615ea: Identification of a GW compact binary merger candidate
  27. LIGO/Virgo/KAGRA S240615dg: Identification of a GW compact binary merger candidate
  28. GRB 240603A: VZLUSAT-2 detection
  29. GRB 240612A: GRBAlpha detection
  30. Fermi GRB 240612B: Global MASTER-Net observations report
  31. Fermi GRB 240612A: Global MASTER-Net observations report
  32. GRB 240607A: GECAM detection of a bright long burst
  33. Fermi GRB 240611A: Global MASTER-Net observations report
  34. Konus-Wind detection of GRB 240607A
  35. EXO 0748-676: Swift-BAT refined analysis
  36. GRB 240529A: LBT optical detection and late temporal decay
  37. GRB 240529A : MITSuME Akeno optical afterglow detection
  38. Fermi GRB 240610A: Global MASTER-Net observations report
  39. IPN triangulation of GRB 240607A
  40. Fermi GRB 240608A: Global MASTER-Net observations report
  41. Konus-Wind detection of GRB 240606B
  42. Fermi GRB 240607A: Global MASTER-Net observations report
  43. GRB 240529A: NOEMA detection
  44. GRB 240607A: Fermi GBM Observation
  45. GRB 240606B: Fermi GBM Observation
  46. Swift Trigger 1235109: consistent with noise and not astrophysical
  47. GRB 240607A: AstroSat CZTI detection of bright long burst
  48. GRB 240607A: Fermi GBM detection of a very bright burst
  49. GRB 240529A: radio detection with AMI-LA
  50. GRB 240606B: GECAM-B detection a long burst
  51. GRB 240606B: Swift ToO observations
  52. GRB 240606B: Swift/BAT-GUANO arcminute localization of a burst
  53. Konus-Wind detection of GRB 240603A
  54. Fermi GRB 240604A: Global MASTER-Net observations report
  55. IPN triangulation of GRB 240531A (short)
  56. Fermi GRB 240605A: Global MASTER-Net observations report
  57. Fermi GRB 240605C: Global MASTER-Net observations report
  58. LIGO/Virgo/KAGRA S240601co: Updated Sky localization
  59. IPN triangulation of GRB 240603A
  60. GRB 240529A: SAO RAS optical observations
  61. Swift Trigger 1232755: likely consistent with noise and not astrophysical
  62. Fermi GRB 240603C: Global MASTER-Net observations report
  63. Swift Trigger 1232465: consistent with noise
  64. GRB 240529A: MASTER prompt OT detection
  65. GRB 240529A: continued SAO RAS optical observations
  66. Fermi GRB 240602A: Global MASTER-Net observations report
  67. GRB 240529A: further SAO RAS optical observations
  68. LIGO/Virgo/KAGRA S240601aj: Updated Sky localization
  69. LIGO/Virgo/KAGRA S240601co: Identification of a GW compact binary merger candidate
  70. GRB 240529A: AKO Optical Afterglow Follow-Up Observations
  71. LIGO/Virgo/KAGRA S240530a: Updated Sky localization
  72. LXT 240528A: GSP optical upper limit
  73. GRB 240529A: 1.3m DFOT Optical observations
  74. LIGO/Virgo/KAGRA S240527en: Updated Sky localization
  75. LIGO/Virgo/KAGRA S240601aj: Identification of a GW compact binary merger candidate
  76. GRB 240529A : Mondy optical observations
  77. Konus-Wind detection of GRB 240529A
  78. IPN triangulation of the initial episode of GRB 240529A
  79. GRB 240529A: SAO RAS optical observations
  80. LIGO/Virgo/KAGRA S240531bp: Updated Sky localization
  81. LIGO/Virgo/KAGRA S240531bp: Identification of a GW compact binary merger candidate
  82. GRB 240529A: MAAO 0.7m telescope optical afterglow detection
  83. GRB 240529A: Insight-HXMT/HE detection
  84. GRB 240529A: optical photometry from Konkoly
  85. GRB 240529A: GROWTH-India optical follow-up
  86. GRB 240529A: T193/MISTRAL observations
  87. GRB 240529A: Redshift from GTC/OSIRIS+
  88. GRB 240529A: AKO Optical Afterglow Detection
  89. LIGO/Virgo/KAGRA S240530a: Identification of a GW compact binary merger candidate
  90. GRB 240529A: J-band detections with WINTER
  91. GRB 240529A: Skynet Optical Observations
  92. GRB 240529A: Swift-BAT refined analysis
  93. LIGO/Virgo S240527fv: GRANDMA/FRAM-Auger Optical Observations
  94. GRB 240529A: Swift/UVOT Detection
  95. GRB 240529A: NOT optical observations
  96. GRB 240529A: AstroSat CZTI detection
  97. GRB 240529A: GOTO optical afterglow detection
  98. LIGO/Virgo/KAGRA S240527fv: Updated Sky localization
  99. GRB 240527B: Fermi GBM Observation
  100. Fermi GRB 240527A: Global MASTER-Net observations report

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