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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"

37588 results found.

  1. GRB 030329: High-Resolution Spectroscopy of the Host
  2. GRB030429 (=H2695): A Long GRB Localized by the HETE WXM and SXC
  3. GRB030418 (=H2686): A Long, X-Ray-Rich GRB Localized by the HETE WXM
  4. GRB030429: RTT150 optical observations, a possible host galaxy
  5. IPN triangulation of GRB030506 (annulus)
  6. IPN triangulation of GRB030505B (large error box)
  7. IPN triangulation of GRB030505A (annulus)
  8. GRB030329: RTT150 optical observations and upper limit for a host
  9. GRB 030329: all-sky CCD images by K. Shiokawa immediately after the burst
  10. GRB030501, optical observation
  11. GRB030501C triangulation (annulus)
  12. GRB030329: RTT150 optical observations and upper limit for a host
  13. GRB 030429: Radio Observations
  14. GRB 030429: redshift from VLT spectroscopy
  15. GRB 030429: IR photometry with IRSF/SIRIUS
  16. GRB030501B triangulation (single error box)
  17. GRB 030329 Optical Observations
  18. GRB 030329, BVRI photometry
  19. GRB 030501: TAROT possible candidate counterpart
  20. IPN triangulation of GRB030501 (IBIS event; annulus)
  21. IPN triangulation of GRB030501B (annulus)
  22. GRB 030429: confirmation of afterglow candidate
  23. GRB030429, possible optical counterpart
  24. GRB030501 localized by INTEGRAL
  25. GRB030425: CrAO optical observation
  26. IPN triangulation of GRB030429 (annulus)
  27. IPN triangulation of GRB030428 (two large error boxes)
  28. GRB 030329 Oprical observations in Rozhen observatory
  29. GRB 030429: ROTSE-III observations
  30. GRB 030324: Radio Observations
  31. GRB030329 observed as a sudden ionospheric disturbance (SID)
  32. IPN triangulation of GRB030426 (annulus)
  33. SNeIa AS THE POSSIBLE PROGENITORS OF SHORT-DURATION GRBs.
  34. IPN triangulation of GRB030425 (single error box)
  35. GRB 030329, the review of the sky area in plate archive (1950-1998)
  36. GRB 030329: Spectral Evolution of SN 2003dh
  37. Optical Observations of GRB 030418 with Magellan
  38. GRB 030329: optical spectropolarimetry at VLT
  39. IPN triangulation of GRB030422C (annulus)
  40. IPN triangulation of GRB030422B (annulus)
  41. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  42. GRB030329: optical polarization
  43. IPN triangulation of GRB030422 (two large error boxes)
  44. GRB 030329 3.5 and 6 cm radio observations at RTF-32 telescope
  45. IPN triangulation of GRB030421 (annulus)
  46. MASTER:optical observations GRB030418
  47. MASTER:optical observations probable GRB030414
  48. GRB030329: 444 AAVSO Measurements
  49. IPN triangulation of GRB030419 (annulus)
  50. MASTER:optical observations GRB030416
  51. ROTSE-III prompt optical detections of GRB 030418
  52. GRB030418: Upper limits from recent and historical observations.
  53. GRB030418: Kiso near infrared observations
  54. GRB 030418: Optical afterglow
  55. GRB 030418: Finder for afterglow candidate
  56. GRB 030418: Optical afterglow candidate
  57. GRB 030329 OT position
  58. OT GRB 030329: early UBVRcIc spectral evolution
  59. GRB030329, UBVRI polarimetry, R-polarization
  60. GRB 030329: SARA Optical Observations
  61. OT GRB 030329: early spectrum
  62. GRB030329: VR Photometry at TNG
  63. GRB030324: Candidate Optical Afterglow (Erratum)
  64. GRB030324: Candidate Optical Afterglow
  65. IPN triangulation of GRB030414 (small error box)
  66. GRB 030413: Optical Observations
  67. GRB 030329 Rc observations
  68. IPN triangulation of GRB030413 (small error box)
  69. IPN triangulation of GRB030410 (annulus)
  70. Superluminal motion in GRB 030329 (Correction)
  71. Superluminal motion in GRB 030329
  72. GRB 030329 and SN 2003dh
  73. GRB030329, optical position
  74. GRB 030329 VLBA Observations
  75. IPN triangulation of GRB030406 (small error box)
  76. IPN triangulation of GRB050403 (small error box)
  77. IPN triangulation of GRB030403 (annulus)
  78. GRB 030329: BVRI photometry at Asiago
  79. GRB 030329, light curve flattens
  80. GRB 030329: VLT V-band photometry
  81. If the SN/GRB connection confirmed
  82. GRB 030329: Supernova Confirmed
  83. GRB030329: RTT150 optical observations
  84. GRB030329: Near Infrared Observations at Gunma
  85. GRB030329: HET spectroscopic monitoring
  86. Kiso observation of the GRB030329 at April 6
  87. GRB 030329, color evolution
  88. GRB030328, UBVRcIc field photometry
  89. GRB 030329 Optical observations
  90. GRB 030329, color evolution
  91. GRB 030329: possible color change
  92. GRB030329: RTT150 optical observations
  93. GRB 030329: Supernova Spectrum Emerging
  94. GRB030329: Kiso B and R band observations
  95. GRB030329: RTT150 optical observation
  96. GRB030329: More AAVSO VR obs
  97. GRB030328: R upper limit after 6 hours by MASTER
  98. GRB 030329: BV photographic observations
  99. GRB 030329: SARA Optical Observations
  100. GRB 030329: SARA Optical Observations

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