ASTROSAT CZTI

Data Quality Report

Orbit 55527

Creation date: 2026-01-02T11:55:51.457347
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A14_099T01_9000006536_55527cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55527cztM0_level2_quad_clean.evt
Size (bytes)673,943,040143,104,320
Size642.7 MB 136.5 MB
Events in quadrant A6,190,218913,711
Events in quadrant B6,217,520976,705
Events in quadrant C5,225,591890,308
Events in quadrant D6,499,925825,548

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A021
B022
C022
D022

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A023626
B023523
C023620
D023630

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0308484608
B0315725030
C0274453572
D0332356165

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A104784073.884329%
B104824214.016409%
C105551741.648508%
D104042852.739331%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 13112 10839 272 272 2.07% 2.51%
B 13073 10873 139 139 1.06% 1.28%
C 13101 10928 91 91 0.69% 0.83%
D 13162 10755 240 240 1.82% 2.23%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 8 790789 2968.91 1076 1049 266.0
A 4 159 528787 1983.95 1076 1049 266.0
A 7 14 284415 1065.27 1076 1049 266.0
B 5 172 1338373 5799.99 1070 1031 230.6
B 7 0 187803 810.02 1070 1031 230.6
B 5 236 123299 530.27 1070 1031 230.6
C 9 38 428813 1473.38 1066 1057 290.3
C 15 147 161030 551.02 1066 1057 290.3
C 13 3 154978 530.17 1066 1057 290.3
D 11 129 639531 2149.76 1045 999 297.0
D 8 245 452202 1519.07 1045 999 297.0
D 15 125 356544 1197.02 1045 999 297.0

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter