ASTROSAT CZTI

Data Quality Report

Orbit 31757

Creation date: 2024-06-27T20:32:18.681230
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/AS1T04_034T01_9000004632_31757cztM0_level2.evt modeM0/AS1T04_034T01_9000004632_31757cztM0_level2_quad_clean.evt
Size (bytes)2,251,232,640236,041,920
Size2.1 GB 225.1 MB
Events in quadrant A25,058,9001,294,020
Events in quadrant B16,056,3451,513,296
Events in quadrant C13,357,1071,455,868
Events in quadrant D12,310,8031,453,200

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04220
B04220
C04220
D04220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0886283
B0639283
C0529733
D0501953

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20770583728.103033%
B207703821.839191%
C207707413.567646%
D207712181.049540%

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 22490 20772 3501 3501 15.57% 16.85%
B 22490 20773 83 83 0.37% 0.40%
C 22490 20773 170 170 0.76% 0.82%
D 22491 20774 88 88 0.39% 0.42%

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 13 16608927 37837.2 2190 2149 438.9
A 13 254 31591 67.08 2190 2149 438.9
A 3 137 22393 46.12 2190 2149 438.9
B 6 159 5562464 11666.57 2473 2406 476.6
B 4 80 308308 641.87 2473 2406 476.6
B 10 245 120540 247.88 2473 2406 476.6
C 0 10 1830202 3282.36 2383 2399 556.9
C 3 233 1708804 3064.36 2383 2399 556.9
C 14 238 396036 706.89 2383 2399 556.9
D 8 195 2107068 3642.66 2431 2367 577.8
D 12 233 622897 1073.97 2431 2367 577.8
D 2 250 231850 397.17 2431 2367 577.8

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