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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_MC161217_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"

10956 results found.

  1. EP261023a: Mondy optical upper limit
  2. EP261023a: Einstein Probe detection of an X-ray transient
  3. The EP-WXT trigger 01709321472 is likely a flaring star
  4. EP261015a: AZT-20 Assy-Turgen optical observations
  5. GRB 261017A: SAO RAS optical upper limit
  6. GRB 260903A
  7. EP261015a: Terskol Zeiss-2000 optical upper limit
  8. GRB 261020A: MAXI GSC detection
  9. GRB 261017A : MITSuME Akeno optical upper limits
  10. GRB 261017A: Swift detection of a burst
  11. EP261015a: SVOM/VT optical observation
  12. GRB 261011A: SAO RAS and AbAO optical observations
  13. EP261006a : MeerKAT radio observations.
  14. GRB 261011A: 10.4m GTC spectroscopic redshift (z = 2.407)
  15. GRB 261012A: MAXI GSC detection
  16. GRB 261011A : MITSuME Akeno optical afterglow candidate detection
  17. GRB 261011A: Optical follow-up observations with Kinder
  18. GRB 261011A: Swift detection of an unusual burst
  19. GRB 261010A: NOT possible optical counterpart
  20. GRB 261010A: Swift detection of a burst
  21. EP261010a: SVOM/VT optical upper limits
  22. GRB261007A: Lesedi optical afterglow detection
  23. GRB 261007A: SVOM/ECLAIRs refined analysis
  24. EP261007b: SVOM/VT optical detection of the NOT transient
  25. EP261007b: NOT optical observations, variable source outside the FXT region
  26. GRB 261007A/EP261007a: Optical follow-up observations with Kinder
  27. EP261006a: Optical follow-up observations with Kinder
  28. GRB 261007A / EP261007a: SVOM/VT optical observations
  29. EP261007b: SVOM/VT optical upper limits
  30. GRB 261007A / EP261007a: VLT/X-shooter spectroscopic redshift z = 2.101
  31. EP261006a: SVOM/VT optical upper limits
  32. GRB 261005B: Swift/UVOT Upper Limits
  33. The EP-WXT trigger 01709320908 is likely a flaring star
  34. GRB 261005B: Swift detection of a burst
  35. GRB 260924A: VLA detection
  36. GRB 260924A: Swift/UVOT UV grism spectrum results
  37. GRB 260924A: AbAO optical observations
  38. GRB 260925A: Swift/UVOT Upper Limits
  39. GRB 260924A: Optical follow-up observations with Kinder
  40. GRB 260924A: Swift/UVOT Detection
  41. GRB 260922A: CALET Gamma-Ray Burst Monitor detection
  42. EP260920a: VLT/HAWK-I near-infrared counterpart confirmation
  43. EP260920b: 2.2m CAHA optical afterglow detection and 10.4m GTC redshift confirmation
  44. GRB 260917B:: SVOM/ECLAIRs refined analysis
  45. EP260920a: VLT/HAWK-I near-infrared candidate
  46. GRB 260921A: Swift detection of a burst
  47. EP260920b: VLT/X-shooter spectroscopic redshift z = 3.582
  48. EP260920b: SVOM/VT optical observation
  49. EP260920a: NOT early time optical upper limits
  50. EP260920a: SVOM/VT optical upper limits
  51. GRB 260915A: VLT optical and near-infrared upper limits
  52. EP260917a: SVOM/VT optical upper limits
  53. GRB 260918A: SVOM/VT optical upper limits
  54. GRB 260917B: Mondy optical upper limit
  55. GRB 260917B: SVOM/VT optical observations
  56. GRB 260914A: Mondy and TShAO optical observations
  57. GRB 260914A: SVOM/ECLAIRs refined analysis
  58. GRB 260916A: MAXI/GSC detection
  59. GRB 260915A: SVOM/VT refined early optical upper limits
  60. GRB 260914A: VLT/X-shooter observations and redshift confirmation
  61. GRB 260915A: SVOM/VT optical upper limits
  62. GRB 260915A: SVOM/VT optical upper limits from VHF data
  63. GRB 260915A: LCO optical upper limits
  64. GRB 260915A: SVOM detection of a burst
  65. GRB 260914A: SVOM/VT optical counterpart confirmation
  66. GRB 260914A: SVOM detection of a burst
  67. GRB 260818A: Continued ATCA observations
  68. GRB 260909A: CrAO and AbAO optical upper limits
  69. GRB 260909A: VLT optical and near-infrared upper limits
  70. GRB 260909A: EP-FXT follow-up observation
  71. GRB 260909A: SVOM/VT optical upper limits
  72. GRB 260909A: Mondy optical observations and afterglow candidate
  73. GRB 260909A: Xinglong 2.16m optical upper limit
  74. GRB 260903A: SAO RAS optical upper limit
  75. EP260903a: EP-FXT follow-up observation
  76. GRB 260903A: SAO RAS optical observations
  77. GRB 260903A: SVOM/VT optical candidate
  78. EP260901a: SVOM/VT optical upper limits
  79. GRB 260831B / sb26083106: SVOM/VT optical variability of V* GK Per
  80. GRB 260818B: SVOM/VT optical upper limit and continuous observations
  81. GRB 260808B: SAO RAS observations of the optical rebrightening
  82. GRB 260822A: SVOM/VT optical upper limits
  83. GRB 260822A: PRIME near-infrared upper limits from multiple epochs
  84. GRB 260822A: the candidate optical afterglow is an unrelated type-Ia SN
  85. GRB 260822A: SVOM/VT optical detection of COLIBRÍ candidate
  86. EP260806a: SAO RAS multicolor optical observations
  87. EP260812a: AbAO optical upper limit
  88. EP260812b: Optical upper limit with Kinder
  89. GRB 260808B: GTC/OSIRIS+ spectroscopic redshift z = 1.295
  90. EP260812b: SVOM/VT optical observation
  91. GRB 260809A: SAO RAS optical observations
  92. GRB 260808B: SAO RAS optical observations
  93. GRB 260808B: SVOM/VT optical re-brightening at day 3
  94. GRB 260806A: CALET Gamma-Ray Burst Monitor detection
  95. EP260809a: VLT/X-shooter spectroscopic redshift z = 3.07
  96. GRB 260808A: CALET Gamma-Ray Burst Monitor detection
  97. GRB 260805C: CALET Gamma-Ray Burst Monitor detection
  98. GRB 260804A: CALET Gamma-Ray Burst Monitor detection
  99. GRB 260809A: SVOM/VT optical counterpart
  100. GRB 260808B: SVOM/VT optical afterglow confirmation

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