ASTROSAT CZTI

Data Quality Report

Orbit 54978

Creation date: 2025-11-26T16:38:28.745044
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_014T01_9000006528_54978cztM0_level2.fits modeM0/AS1A14_014T01_9000006528_54978cztM0_level2_quad_clean.evt
Size (bytes)2,422,912,320217,630,080
Size2.3 GB 207.5 MB
Events in quadrant A19,160,0371,386,302
Events in quadrant B9,027,2221,948,236
Events in quadrant C11,339,9991,687,753
Events in quadrant D48,653,245221,144

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0705484
B0416454
C0480704
D015788012

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04020
B04020
C04020
D04020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0280
B0280
C0280
D0280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A19515416621.347681%
B195151650.845503%
C195157073.622854%
D195141718688.070104%

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 22485 19519 3344 3344 14.87% 17.13%
B 22485 19519 35 35 0.16% 0.18%
C 22485 19519 528 528 2.35% 2.71%
D 22485 19515 16595 16595 73.80% 85.04%

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 32 11396232 24784.96 1860 1811 459.7
A 13 248 135586 290.99 1860 1811 459.7
A 4 3 119207 255.36 1860 1811 459.7
B 5 185 367110 826.01 2052 1974 442.0
B 10 245 182773 409.0 2052 1974 442.0
B 10 247 77825 171.59 2052 1974 442.0
C 4 5 1848555 3370.0 1990 1978 547.9
C 13 3 739851 1346.61 1990 1978 547.9
C 6 223 300370 544.56 1990 1978 547.9
D 15 94 41674915 157746.33 921 877 264.2
D 11 129 822832 3111.3 921 877 264.2
D 9 19 578560 2186.67 921 877 264.2

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