ASTROSAT CZTI

Data Quality Report

Orbit 20171002_A04_055T01_9000001574_level2

Creation date: 2025-11-17T11:17:01.581551
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/AS1A04_055T01_9000001574cztM0_level2.fits modeM0/AS1A04_055T01_9000001574cztM0_level2_quad_clean.evt
Size (bytes)771,275,520848,096,640
Size735.5 MB 808.8 MB
Events in quadrant A4,553,6104,989,789
Events in quadrant B4,422,3825,062,950
Events in quadrant C4,657,3325,238,189
Events in quadrant D3,998,9504,674,075

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02332340
B02237870
C01735600
D02078270

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01330
B01330
C01330
D01330

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017020
B017020
C017020
D017020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8342759777.164347%
B8342755886.698071%
C834277540.903784%
D8342728443.408968%

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 96586 83195 0 0 0.00% 0.00%
B 96587 83411 0 0 0.00% 0.00%
C 96587 83422 0 0 0.00% 0.00%
D 96587 83157 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 4393 11.08 1187 1112 296.1
A 7 110 3683 8.68 1187 1112 296.1
A 0 30 3440 7.86 1187 1112 296.1
B 2 9 3836 11.9 1167 1116 228.6
B 12 226 3079 8.59 1167 1116 228.6
B 14 254 3019 8.33 1167 1116 228.6
C 12 241 3367 7.04 1229 1148 315.2
C 2 191 3154 6.36 1229 1148 315.2
C 9 188 3066 6.08 1229 1148 315.2
D 6 231 2972 6.31 1142 1041 305.8
D 3 14 2952 6.25 1142 1041 305.8
D 1 19 2824 5.83 1142 1041 305.8

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