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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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"

15987 results found.

  1. GRB 110411A: MASTER optical observations
  2. GRB 110328A / Swift J164449.3+573451: R-band Monitoring
  3. GRB 110328A / Swift J164449.3+573451: MASTER pre, prompt and follow-up observations
  4. GRB 110328A / Swift J164449.3+573451: optical observations
  5. GRB 110407A: SMARTS optical limit
  6. GRB 110407A: MASTER optical observations
  7. GRB110407A: UVOT Upper Limits
  8. GRB 110407A: GROND Detection of the Optical Afterglow
  9. GRB 110407A: MITSuME Okayama and Ishigakijima Optical upper limits
  10. GRB 110407A: NOT optical observations
  11. GRB 100407A : Errata of afterglow position in GCN 11899
  12. GRB 110407A : Lulin optical afterglow detection
  13. GRB 110407A: MASTER early optical observations
  14. GRB 110402A: fading optical afterglow
  15. GRB 110328/Swift J164449.3+573451: Chandra observations
  16. GRB 110402A: LOAO Optical Observation
  17. GRB 110328A / Swift J164449.3+573451: Keck LRIS R-band photometry
  18. GRB 110328A / Swift J164449.3+573451, HST Observations
  19. GRB 110402A: optical observations in Mondy
  20. GRB 110328A / Swift J164449.3+573451: Keck/DEIMOS Optical Spectroscopy
  21. GRB 110402A: MITSuME Okayama and Ishigakijima Optical upper limits
  22. GRB 110328A/Swift J164449.3+573451: SARA-N detection
  23. GRB 110402A: early optical limit by "Pi of the Sky"
  24. GRB 110402A: further NOT observations
  25. GRB 110402A: PAIRITEL NIR Upper Limits
  26. GRB 110402A: NOT afterglow confirmation
  27. GRB 110328A / Swift J164449.3+573451: Radio-optical/NIR Astrometry
  28. GRB 110328A / Swift J164449.3+573451: Infrared transient
  29. GRB 110328A / Swift J164449.3+573451: Mondy optical observations
  30. GRB 110328A / Swift J164449.3+573451: EVLA observations of a brightening radio source
  31. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Detection in 2nd Epoch
  32. GRB 110328A / Swift J164449.3+573451: No optical variability of the optical counterpart
  33. GRB 110328A / Swift J164449.3+573451: BAT refined analysis
  34. GRB 110328A / Swift J164449.3+573451: LOAO R-band Observation
  35. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Upper Limits
  36. GRB 110328A / Swift J164449.3+573451: optical observations
  37. GRB 110328A / Swift J164449.3+573451: EVLA Detection
  38. GRB 110328A / Swift J164449.3+573451: optical spectroscopy from GTC
  39. GRB 110328A: Gemini spectroscopic observations
  40. GRB 110328A / Swift J164449.3+573451: NOT optical observations.
  41. GRB 110328A/ Swift J164449.3+573451 : Xinglong TNT Upper limit
  42. GRB / X-ray transient 110328A: MITSuME OkayamaOptical upper limits
  43. GRB 110328A / Swift J164449.3+573451: PTF Quiescent Optical Counterpart
  44. GRB / X-ray transient 110328A: Gemini optical observations
  45. GRB110318B : MOA optical upper limit
  46. GRB 101225A: revised analysis of narrow band imaging
  47. GRB 110319B: Swift/UVOT Upper Limits
  48. GRB 110318B: Swift/UVOT Upper Limits
  49. GRB 110319A: Swift/UVOT Detection
  50. GRB 110315A: RTT150 optical observations
  51. GRB 110315A: Swift/UVOT Upper Limits
  52. GRB 110315A: MASTER early optical observations
  53. GRB110312A: MITSuME Okayama Optical upper limits
  54. GRB 110312A: RTT150 optical observations
  55. GRB 110312A: Swift/UVOT Upper Limits
  56. GRB 110305A: REM detection of a possible NIR afterglow
  57. GRB110305A: MITSuME Ishigakijima Optical upper limits
  58. GRB 110305A: Swift/UVOT Upper Limits
  59. GRB 110305A: GROND Detection of Optical Afterglow
  60. GRB 110223A: optical upper limits
  61. Swift/UVOT observations of GRB110223A
  62. No IPN GRB detected in conjunction with candidate GRB 110215
  63. GRB GRB 110223A: MASTER VWF early optical observations
  64. Swift/UVOT observations of GRB110223b
  65. GRB 110223A : early optical limit by "Pi of the Sky"
  66. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  67. OT 110215: Further NIR observations from NOT of the GRB candidate
  68. GRB 110213B: Swift/UVOT observations
  69. Swift XRT and UVOT Observations of OT 110215
  70. OT 110215: NIR observations from NOT of GRB candidate
  71. GRB 110213A: optical observations in CrAO
  72. GRB 110213B: GROND observations of the optical/NIR afterglow
  73. GRB 110213A: optical observations in Mondy
  74. OT 110215: possible GRB from 2MASS J00264184+8324093
  75. Swift/UVOT observations of GRB110210a.
  76. GRB 110210A: optical upper limit
  77. GRB 110213B: Gemini South Redshift
  78. GRB 110213B: Possible Host Galaxy in SDSS Stripe 82 Imaging
  79. GRB 110213B: P60 Optical Afterglow Candidate
  80. GRB 110213A: TNT optical observations
  81. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  82. Swift GRB110213A: interesting behaviour
  83. GRB 110205A: Konkoly optical observations
  84. GRB 110213A: MITSuME Akeno Optical Observation
  85. GRB110213A: MITSuME Okayama Optical Observation
  86. GRB 110213A: THO optical observations
  87. GRB 110213A: Lightbuckets Optical Observations
  88. GRB 110213A: optical observations
  89. GRB110212A: MITSuME Okayama optical upper limits
  90. GRB 110213A: GRAS011 optical observations
  91. GRB 110213A: Bok Telescope Redshift
  92. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  93. GRB 110213A: P60 Optical Afterglow Detection
  94. GRB 110213A: Swift detection of a burst with optical afterglow
  95. GRB 110212A: GRT Optical Observation
  96. GRB 110212A: SARA-N Optical Limits
  97. GRB110212A: BOOTES-2/TELMA optical limits
  98. GRB 110212A: ROTSE-III Optical Limits
  99. GRB 110205A: detection of optical linear polarization from CAHA
  100. GRB 110210A: optical upper limit

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