ASTROSAT CZTI

Data Quality Report

Orbit 54918

Creation date: 2025-11-22T11:29:07.011623
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_54918cztM0_level2.fits modeM0/AS1A14_014T01_9000006528_54918cztM0_level2_quad_clean.evt
Size (bytes)1,573,758,720272,499,840
Size1.5 GB 259.9 MB
Events in quadrant A16,741,8121,732,626
Events in quadrant B9,911,2321,947,182
Events in quadrant C12,693,6861,714,857
Events in quadrant D17,338,4751,455,245

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06423436
B04447215
C05255915
D06644042

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04140
B04140
C04140
D04131

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2032414106.937611%
B203243921.928754%
C203268133.999803%
D20323207910.229789%

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 21597 20334 981 981 4.54% 4.82%
B 21597 20333 142 142 0.66% 0.70%
C 21598 20336 590 590 2.73% 2.90%
D 21597 20332 1758 1758 8.14% 8.65%

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 4576680 8943.6 2051 1998 511.5
A 3 45 2926609 5717.67 2051 1998 511.5
A 0 8 926585 1807.59 2051 1998 511.5
B 5 236 769919 1717.94 2083 2002 447.0
B 5 172 394977 879.14 2083 2002 447.0
B 5 185 300217 667.15 2083 2002 447.0
C 4 5 1525496 2721.55 2023 1999 559.8
C 13 3 634316 1129.56 2023 1999 559.8
C 12 252 526362 936.71 2023 1999 559.8
D 11 129 3447012 6247.81 1923 1840 551.4
D 15 94 1707455 3093.13 1923 1840 551.4
D 6 239 1120350 2028.41 1923 1840 551.4

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