ASTROSAT CZTI

Data Quality Report

Orbit 55958

Creation date: 2026-02-05T22:55:08.059020
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_066T02_9000006546_55958cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55958cztM0_level2_quad_clean.evt
Size (bytes)1,318,662,720163,906,560
Size1.2 GB 156.3 MB
Events in quadrant A10,524,1691,113,665
Events in quadrant B7,952,0511,239,895
Events in quadrant C8,689,4041,066,836
Events in quadrant D20,649,148649,407

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0404523
B0328113
C0358333
D0702903

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02620
B02620
C02620
D02620

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A129169167.091979%
B129165594.327965%
C129169507.355218%
D12916542241.978941%

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 14176 12918 827 827 5.83% 6.40%
B 14176 12918 326 326 2.30% 2.52%
C 14176 12918 842 842 5.94% 6.52%
D 14176 12918 5046 5046 35.60% 39.06%

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 12 115 4706464 14397.26 1328 1292 326.8
A 3 14 234185 712.62 1328 1292 326.8
A 0 8 173550 527.09 1328 1292 326.8
B 2 249 1039199 3606.37 1346 1296 287.8
B 9 251 816453 2832.4 1346 1296 287.8
B 0 199 263209 910.06 1346 1296 287.8
C 13 3 2321137 6592.81 1281 1269 351.9
C 1 29 724212 2054.52 1281 1269 351.9
C 12 249 303349 858.48 1281 1269 351.9
D 11 129 12494151 39695.77 1095 1046 314.7
D 2 62 3212031 10202.63 1095 1046 314.7
D 3 12 341661 1082.27 1095 1046 314.7

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