ASTROSAT CZTI

Data Quality Report

Orbit 21857

Creation date: 2024-06-27T18:33:06.145144
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/AS1A07_004T01_9000003230_21857cztM0_level2.evt modeM0/AS1A07_004T01_9000003230_21857cztM0_level2_quad_clean.evt
Size (bytes)101,926,08029,934,720
Size97.2 MB 28.5 MB
Events in quadrant A686,525206,804
Events in quadrant B794,009214,450
Events in quadrant C677,838201,545
Events in quadrant D839,478188,088

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A027811
B031311
C027641
D033021

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B030
C030
D030

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A126490.712025%
B1264282.215190%
C126490.712025%
D1264514.034810%

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 1264 1264 1 1 0.08% 0.08%
B 1264 1264 5 5 0.40% 0.40%
C 1264 1264 0 0 0.00% 0.00%
D 1264 1264 43 43 3.40% 3.40%

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 4 2 8377 222.19 175 172 36.9
A 13 254 2741 69.57 175 172 36.9
A 0 226 1584 38.24 175 172 36.9
B 15 33 34418 983.78 177 173 34.8
B 5 172 17046 484.72 177 173 34.8
B 3 64 15475 439.59 177 173 34.8
C 14 238 26606 663.02 165 165 39.9
C 0 10 5670 138.04 165 165 39.9
C 13 61 1191 25.73 165 165 39.9
D 7 238 116268 2820.15 160 155 41.2
D 12 235 35915 868.54 160 155 41.2
D 13 249 19156 461.5 160 155 41.2

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