ASTROSAT CZTI

Data Quality Report

Orbit 20210215_A10_099T01_9000004184_level2

Creation date: 2025-12-20T15:46:25.058156
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/AS1A10_099T01_9000004184cztM0_level2.fits modeM0/AS1A10_099T01_9000004184cztM0_level2_quad_clean.evt
Size (bytes)3,004,188,4802,584,624,320
Size2.8 GB 2.4 GB
Events in quadrant A18,891,80015,226,177
Events in quadrant B18,052,86015,323,506
Events in quadrant C18,192,03014,479,519
Events in quadrant D15,735,58013,136,309

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04720
B04720
C04720
D04720

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A059860
B059860
C059860
D059860

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06205600
B06389870
C06278940
D08113570

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A29360833011.124288%
B29360946581.586464%
C29360954281.848717%
D293609128434.374185%

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 344289 293608 0 0 0.00% 0.00%
B 344288 293552 0 0 0.00% 0.00%
C 344289 293609 0 0 0.00% 0.00%
D 344288 293546 0 0 0.00% 0.00%

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 29 15468 9.18 4921 4628 1181.4
A 7 110 14861 8.66 4921 4628 1181.4
A 9 19 13851 7.81 4921 4628 1181.4
B 2 9 14213 10.43 4773 4555 925.8
B 2 8 11894 7.93 4773 4555 925.8
B 5 225 11816 7.84 4773 4555 925.8
C 1 80 13969 7.86 4808 4507 1204.3
C 1 81 13967 7.86 4808 4507 1204.3
C 12 241 12426 6.58 4808 4507 1204.3
D 15 46 11759 6.48 4491 4099 1182.5
D 10 189 11156 5.97 4491 4099 1182.5
D 6 231 11107 5.93 4491 4099 1182.5

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