ASTROSAT CZTI

Data Quality Report

Orbit 59074

Creation date: 2026-08-29T00:45:09.595970
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/AS1A14_004T02_9000006600_59074cztM0_level2.fits modeM0/AS1A14_004T02_9000006600_59074cztM0_level2_quad_clean.evt
Size (bytes)1,645,508,160165,516,480
Size1.5 GB 157.8 MB
Events in quadrant A7,164,9601,363,612
Events in quadrant B7,147,5121,413,196
Events in quadrant C10,554,4911,131,660
Events in quadrant D34,943,282120,312

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0309253
B0312213
C0415583
D01130214

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02940
B02940
C02940
D02940

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A142122021.421334%
B142133082.167030%
C14213177212.467459%
D142121299791.450887%

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 16128 14215 77 77 0.48% 0.54%
B 16129 14217 122 122 0.76% 0.86%
C 16129 14215 1285 1285 7.97% 9.04%
D 16127 14211 12434 12434 77.10% 87.50%

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 15 233 295873 759.81 1587 1545 387.4
A 3 245 149997 383.23 1587 1545 387.4
A 0 24 100648 255.83 1587 1545 387.4
B 4 171 217529 647.62 1566 1505 333.6
B 4 201 200561 596.75 1566 1505 333.6
B 5 185 189925 564.86 1566 1505 333.6
C 15 198 3531444 8948.81 1441 1424 394.5
C 12 252 807988 2044.69 1441 1424 394.5
C 6 223 227410 572.89 1441 1424 394.5
D 12 1 30253780 269083.41 394 376 112.4
D 2 62 2054225 18267.59 394 376 112.4
D 6 239 447393 3975.91 394 376 112.4

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

TCT plots

Parameter TCT0 TCT_healed
Tct