ASTROSAT CZTI

Data Quality Report

Orbit 58158

Creation date: 2026-06-30T12:13:23.863997
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_042T02_9000006586_58158cztM0_level2.fits modeM0/AS1A14_042T02_9000006586_58158cztM0_level2_quad_clean.evt
Size (bytes)1,676,698,560238,708,800
Size1.6 GB 227.7 MB
Events in quadrant A8,078,9951,760,231
Events in quadrant B33,427,666956,448
Events in quadrant C9,284,0471,660,481
Events in quadrant D9,827,5281,561,018

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03800
B03800
C03800
D03800

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0380654
B01123643
C0411553
D0427743

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18701620.331533%
B18701980552.430351%
C187011470.786054%
D187012671.427731%

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 20302 18705 11 11 0.05% 0.06%
B 20301 18700 8792 8792 43.31% 47.02%
C 20302 18705 111 111 0.55% 0.59%
D 20302 18705 252 252 1.24% 1.35%

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 3 14 90793 177.75 2036 1983 499.6
A 3 245 39715 75.52 2036 1983 499.6
A 13 254 30309 56.69 2036 1983 499.6
B 10 128 26739830 86428.28 1441 1382 309.4
B 10 247 244421 785.59 1441 1382 309.4
B 5 185 174636 560.02 1441 1382 309.4
C 12 252 687538 1261.77 1972 1948 543.4
C 12 254 546321 1001.87 1972 1948 543.4
C 14 96 146284 265.64 1972 1948 543.4
D 8 240 528638 960.37 1953 1869 548.5
D 12 218 322939 585.35 1953 1869 548.5
D 2 249 315523 571.83 1953 1869 548.5

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