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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.

"N/A_MC170630_R1" does not adhere to advanced search syntax. Please refer to the documentation and try again.
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"

10927 results found.

  1. GRB 260223A: 7DT detection and Medium-band SED of Afterglow
  2. EP260214a: VLT/FORS2 optical observations
  3. GRB 260226A: CALET Gamma-Ray Burst Monitor detection
  4. EP260214a: VLA 6 GHz detection
  5. GRB 260225A: SVOM/VT optical observation
  6. GRB 260225A: SVOM/COLIBRÍ (FM-GFT) Detection of an Optical Counterpart Candidate
  7. GRB 260225A: SVOM/VT optical upper limits
  8. EP260126a: VLA 6 GHz detection
  9. EP260223a: Liverpool Telescope upper limits
  10. GRB 260225A: SVOM/COLIBRÍ (FM-GFT) optical upper limits
  11. EP260223a: Xinglong optical upper limit
  12. sb26021801: SVOM/VT optical upper limits
  13. GRB 260223A: SVOM/VT optical observation
  14. EP260221a: Optical upper limit with Kinder observations
  15. EP260214b: Mondy optical observations
  16. EP260210a: Mondy optical upper limits
  17. GRB 260208A: AbAO and Terskol optical upper limits
  18. GRB 260208A: continued Mondy optical observations
  19. EP260214b: Optical upper limit with Kinder observations
  20. EP260214a: Optical upper limits with Kinder observations
  21. EP260214a: VLT near-infrared observation
  22. EP260214b: SVOM/VT optical observation
  23. EP260214b: OHP/T120 optical observations
  24. EP260214b: VLT/X-shooter spectroscopic redshift z = 1.208
  25. GRB 260211A: SVOM/VT optical counterpart
  26. EP260214a: SVOM/VT optical upper limits
  27. EP260213a: Optical upper limits with Kinder observations
  28. EP260213a: SVOM/VT optical upper limit
  29. EP260213a: Mondy R-band optical upper limit
  30. GRB 260211A: SVOM/VT optical observation
  31. GRB 260211A: SVOM/COLIBRÍ (FM-GFT) optical upper limits
  32. EP260210a: Optical upper limits with Kinder observations
  33. EP260210a: SVOM/VT optical upper limit
  34. GRB 260208B: refined analysis of the EP-FXT observation
  35. GRB 260131A/B: continued Mondy optical observations
  36. GRB 260208A: Mondy optical observations
  37. GRB 260208B: EP-FXT observation
  38. GRB 260208B: SVOM/VT optical candidate
  39. GRB 260208A: SVOM/VT optical observation
  40. GRB 260208A : MASTER bright optical transient inside retracted Fermi error-box
  41. GRB 260207A : MASTER optical counterpart discovery
  42. GRB 260131A/B: Mondy and Terskol optical observations
  43. GRB 260206A (or XRB from 4U 0513-40): MAXI/GSC detection
  44. GRB 260204A: SVOM/VT confirms fading of the optical afterglow
  45. GRB 260204A: SVOM/VT optical candidate
  46. GRB 260204A : MASTER Global robotic net optical observations
  47. GRB 260131A/B: OHP/T193 optical observations
  48. EP260131a: SVOM/VT optical observation
  49. EP260131a: VLT/X-shooter spectroscopic redshift z = 0.937
  50. EP260131a: NOT early detection of the counterpart in "rapid response mode"
  51. GRB 260131B: MAXI/GSC detection
  52. GRB 260128B: SVOM/COLIBRÍ (FM-GFT) optical upper limits
  53. GRB 260127A: INASAN-Kislovodsk, SAO RAS, and Terskol K-800 optical observations
  54. EP260128a: NOT optical counterpart candidate
  55. EP260128a: LCO optical upper limits
  56. EP260126a: SVOM/VT optical upperlimit
  57. GRB 260127A: Fermi GBM Observation
  58. GRB 260127A : MITSuME Akeno optical afterglow candidate detection
  59. Swift GRB 260127A: Global MASTER-Net observations report
  60. GRB 260127A: Swift detection of a burst
  61. EP260126a: Optical upper limit with Kinder observations
  62. EP260126a: Liverpool Telescope optical upper limits
  63. EP260126a: Further NOT optical upper limits
  64. GRB 260114A: SVOM/VT optical upper limits
  65. EP260119a: Assy AZT-20 optical observations
  66. EP260119a: Mondy and SAO RAS optical upper limits
  67. EP260119A: Mondy I-Band Observations
  68. GRB 251202A: further radio observations with the VLA
  69. EP260119a: SVOM/VT optical observation
  70. GRB 260117A: ZTSh optical upper limit
  71. GRB 260110A: SVOM detection of a burst through offline search
  72. Swift trigger on the HMXB 1A 1118-61
  73. GRB 260117A: SVOM/VT optical candidate
  74. GRB 260114A: VLT/MUSE spectroscopic observations
  75. EP260116a: Xinglong optical upper limit
  76. GRB 260114A: VLT/HAWK-I further near-infrared upper limits
  77. GRB 251222A: radio detection with the VLA
  78. GRB 260114A : MITSuME Akeno optical upper limits
  79. GRB 260114A: Mondy optical observations
  80. GRB 260114A: Swift detection of a short burst
  81. EP260110a: NOT and GTC Optical and Near-Infrared Observations
  82. GRB 251230A: Mondy Optical Observations
  83. EP260110a: SVOM/VT optical upper limits
  84. Swift Trigger 1434591: possible GRB 260109C
  85. GRB 260102A: AbAO optical observations
  86. EP260105a: SVOM/VT optical upperlimit
  87. FRB 20251229A: A potentially hyperactive repeating fast radio burst source
  88. GRB 260101A: Swift/UVOT Detection
  89. GRB 260102A: SVOM/VT optical counterpart
  90. GRB 260101A: NOT spectroscopic observations
  91. GRB 260101A: OSIRIS+ redshift z = 2.623 for the new year burst
  92. GRB 260101A: Swift detection of a burst with an optical counterpart
  93. GRB 251230A / EP251230a: SVOM/VT optical continued observations and upper limit
  94. GRB 251230A: GRANDMA/TAROT Early Detection
  95. GRB 251230A/EP251230a: Optical upper limit with Kinder observations
  96. EP251229a: Optical upper limit with Kinder observations
  97. GRB 251222A: Mondy Optical Observations
  98. GRB251230A: 7DT optical upper limits
  99. GRB 251230A / EP251230a: SVOM/VT optical observation
  100. GRB 251129A: redshift correction and SN detection at z = 0.505 with GTC

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