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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_MC170405_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').
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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"

10961 results found.

  1. GRB 261026A: SVOM/VT optical blue bump
  2. GRB 261026A: SAO RAS optical observations
  3. GRB 261026A: OHP/T120 optical imaging
  4. GRB 261026A: SVOM/VT optical observations
  5. IPN triangulation of GRB 260730B
  6. EP261023a: Mondy optical upper limit
  7. EP261023a: Einstein Probe detection of an X-ray transient
  8. The EP-WXT trigger 01709321472 is likely a flaring star
  9. EP261015a: AZT-20 Assy-Turgen optical observations
  10. GRB 261017A: SAO RAS optical upper limit
  11. GRB 260903A
  12. EP261015a: Terskol Zeiss-2000 optical upper limit
  13. GRB 261020A: MAXI GSC detection
  14. GRB 261017A : MITSuME Akeno optical upper limits
  15. GRB 261017A: Swift detection of a burst
  16. EP261015a: SVOM/VT optical observation
  17. GRB 261011A: SAO RAS and AbAO optical observations
  18. EP261006a : MeerKAT radio observations.
  19. GRB 261011A: 10.4m GTC spectroscopic redshift (z = 2.407)
  20. GRB 261012A: MAXI GSC detection
  21. GRB 261011A : MITSuME Akeno optical afterglow candidate detection
  22. GRB 261011A: Optical follow-up observations with Kinder
  23. GRB 261011A: Swift detection of an unusual burst
  24. GRB 261010A: NOT possible optical counterpart
  25. GRB 261010A: Swift detection of a burst
  26. EP261010a: SVOM/VT optical upper limits
  27. GRB261007A: Lesedi optical afterglow detection
  28. GRB 261007A: SVOM/ECLAIRs refined analysis
  29. EP261007b: SVOM/VT optical detection of the NOT transient
  30. EP261007b: NOT optical observations, variable source outside the FXT region
  31. GRB 261007A/EP261007a: Optical follow-up observations with Kinder
  32. EP261006a: Optical follow-up observations with Kinder
  33. GRB 261007A / EP261007a: SVOM/VT optical observations
  34. EP261007b: SVOM/VT optical upper limits
  35. GRB 261007A / EP261007a: VLT/X-shooter spectroscopic redshift z = 2.101
  36. EP261006a: SVOM/VT optical upper limits
  37. GRB 261005B: Swift/UVOT Upper Limits
  38. The EP-WXT trigger 01709320908 is likely a flaring star
  39. GRB 261005B: Swift detection of a burst
  40. GRB 260924A: VLA detection
  41. GRB 260924A: Swift/UVOT UV grism spectrum results
  42. GRB 260924A: AbAO optical observations
  43. GRB 260925A: Swift/UVOT Upper Limits
  44. GRB 260924A: Optical follow-up observations with Kinder
  45. GRB 260924A: Swift/UVOT Detection
  46. GRB 260922A: CALET Gamma-Ray Burst Monitor detection
  47. EP260920a: VLT/HAWK-I near-infrared counterpart confirmation
  48. EP260920b: 2.2m CAHA optical afterglow detection and 10.4m GTC redshift confirmation
  49. GRB 260917B:: SVOM/ECLAIRs refined analysis
  50. EP260920a: VLT/HAWK-I near-infrared candidate
  51. GRB 260921A: Swift detection of a burst
  52. EP260920b: VLT/X-shooter spectroscopic redshift z = 3.582
  53. EP260920b: SVOM/VT optical observation
  54. EP260920a: NOT early time optical upper limits
  55. EP260920a: SVOM/VT optical upper limits
  56. GRB 260915A: VLT optical and near-infrared upper limits
  57. EP260917a: SVOM/VT optical upper limits
  58. GRB 260918A: SVOM/VT optical upper limits
  59. GRB 260917B: Mondy optical upper limit
  60. GRB 260917B: SVOM/VT optical observations
  61. GRB 260914A: Mondy and TShAO optical observations
  62. GRB 260914A: SVOM/ECLAIRs refined analysis
  63. GRB 260916A: MAXI/GSC detection
  64. GRB 260915A: SVOM/VT refined early optical upper limits
  65. GRB 260914A: VLT/X-shooter observations and redshift confirmation
  66. GRB 260915A: SVOM/VT optical upper limits
  67. GRB 260915A: SVOM/VT optical upper limits from VHF data
  68. GRB 260915A: LCO optical upper limits
  69. GRB 260915A: SVOM detection of a burst
  70. GRB 260914A: SVOM/VT optical counterpart confirmation
  71. GRB 260914A: SVOM detection of a burst
  72. GRB 260818A: Continued ATCA observations
  73. GRB 260909A: CrAO and AbAO optical upper limits
  74. GRB 260909A: VLT optical and near-infrared upper limits
  75. GRB 260909A: EP-FXT follow-up observation
  76. GRB 260909A: SVOM/VT optical upper limits
  77. GRB 260909A: Mondy optical observations and afterglow candidate
  78. GRB 260909A: Xinglong 2.16m optical upper limit
  79. GRB 260903A: SAO RAS optical upper limit
  80. EP260903a: EP-FXT follow-up observation
  81. GRB 260903A: SAO RAS optical observations
  82. GRB 260903A: SVOM/VT optical candidate
  83. EP260901a: SVOM/VT optical upper limits
  84. GRB 260831B / sb26083106: SVOM/VT optical variability of V* GK Per
  85. GRB 260818B: SVOM/VT optical upper limit and continuous observations
  86. GRB 260808B: SAO RAS observations of the optical rebrightening
  87. GRB 260822A: SVOM/VT optical upper limits
  88. GRB 260822A: PRIME near-infrared upper limits from multiple epochs
  89. GRB 260822A: the candidate optical afterglow is an unrelated type-Ia SN
  90. GRB 260822A: SVOM/VT optical detection of COLIBRÍ candidate
  91. EP260806a: SAO RAS multicolor optical observations
  92. EP260812a: AbAO optical upper limit
  93. EP260812b: Optical upper limit with Kinder
  94. GRB 260808B: GTC/OSIRIS+ spectroscopic redshift z = 1.295
  95. EP260812b: SVOM/VT optical observation
  96. GRB 260809A: SAO RAS optical observations
  97. GRB 260808B: SAO RAS optical observations
  98. GRB 260808B: SVOM/VT optical re-brightening at day 3
  99. GRB 260806A: CALET Gamma-Ray Burst Monitor detection
  100. EP260809a: VLT/X-shooter spectroscopic redshift z = 3.07

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