ASTROSAT CZTI

Data Quality Report

Orbit 57950

Creation date: 2026-06-14T10:17:19.842611
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_031T01_9000006584_57950cztM0_level2.fits modeM0/AS1A14_031T01_9000006584_57950cztM0_level2_quad_clean.evt
Size (bytes)2,374,591,680485,354,880
Size2.2 GB 462.9 MB
Events in quadrant A15,217,4243,275,368
Events in quadrant B18,307,4333,461,068
Events in quadrant C23,303,9842,986,025
Events in quadrant D28,453,6932,647,807

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0480
B0480
C0480
D0480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0702675
B0784585
C0933965
D01090246

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06860
B06860
C06860
D06860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A338531790.528757%
B3385410573.122231%
C3385417735.237195%
D33853368810.894160%

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 38523 33860 19 19 0.05% 0.06%
B 38524 33861 456 456 1.18% 1.35%
C 38524 33860 1291 1291 3.35% 3.81%
D 38523 33859 3451 3451 8.96% 10.19%

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 64 246750 265.21 3739 3647 916.6
A 3 14 189229 202.46 3739 3647 916.6
A 13 248 68579 70.84 3739 3647 916.6
B 5 185 1704074 2172.43 3664 3517 782.8
B 3 238 783092 995.89 3664 3517 782.8
B 10 247 313121 395.51 3664 3517 782.8
C 15 224 7988238 8285.05 3543 3510 963.8
C 14 254 406654 418.31 3543 3510 963.8
C 12 252 382968 393.73 3543 3510 963.8
D 12 110 11965964 12419.11 3413 3267 963.2
D 8 240 854587 883.8 3413 3267 963.2
D 2 249 682494 705.14 3413 3267 963.2

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