ASTROSAT CZTI

Data Quality Report

Orbit 20220512_A09_146T01_9000005142_level2

Creation date: 2026-01-02T16:33:17.968733
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/AS1A09_146T01_9000005142cztM0_level2.fits modeM0/AS1A09_146T01_9000005142cztM0_level2_quad_clean.evt
Size (bytes)879,978,240853,879,680
Size839.2 MB 814.3 MB
Events in quadrant A4,983,2044,565,288
Events in quadrant B5,226,3865,312,118
Events in quadrant C5,361,9705,059,094
Events in quadrant D4,569,9664,422,509

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019400
B019400
C019400
D019400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03033460
B02275640
C02134030
D02782410

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03290
B03290
C03290
D03290

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A948101391714.678831%
B9481019822.090497%
C9481013751.450269%
D9481058286.147031%

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 127845 93301 0 0 0.00% 0.00%
B 127845 94770 0 0 0.00% 0.00%
C 127845 94772 0 0 0.00% 0.00%
D 127845 94688 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 7 110 4051 8.86 1302 1225 318.9
A 9 19 3961 8.58 1302 1225 318.9
A 0 29 3948 8.54 1302 1225 318.9
B 2 9 4566 11.75 1387 1325 275.8
B 3 80 4118 10.13 1387 1325 275.8
B 2 8 3734 8.73 1387 1325 275.8
C 1 81 4469 8.57 1418 1326 366.8
C 1 80 4377 8.32 1418 1326 366.8
C 3 202 4104 7.57 1418 1326 366.8
D 7 3 3437 6.42 1310 1194 349.6
D 4 160 3427 6.39 1310 1194 349.6
D 10 113 3303 6.03 1310 1194 349.6

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