ASTROSAT CZTI

Data Quality Report

Orbit 57505

Creation date: 2026-05-15T17:04:07.812376
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_113T09_9000006574_57505cztM0_level2.fits modeM0/AS1A14_113T09_9000006574_57505cztM0_level2_quad_clean.evt
Size (bytes)2,522,949,120470,810,880
Size2.3 GB 449.0 MB
Events in quadrant A16,634,6993,151,869
Events in quadrant B19,739,0773,343,501
Events in quadrant C28,088,0162,825,957
Events in quadrant D26,310,8422,603,836

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06880
B06880
C06880
D06880

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0250

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0752015
B0819745
C01072525
D01024455

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A338867132.104114%
B3388710883.210671%
C3388731739.363473%
D33887364910.768141%

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 38409 33891 426 426 1.11% 1.26%
B 38410 33892 445 445 1.16% 1.31%
C 38410 33892 2544 2544 6.62% 7.51%
D 38410 33892 3151 3151 8.20% 9.30%

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 13 248 2295094 2569.22 3645 3545 891.9
A 3 128 108190 117.32 3645 3545 891.9
A 4 3 49677 51.72 3645 3545 891.9
B 4 206 3806726 4973.05 3583 3438 764.8
B 2 249 331863 429.44 3583 3438 764.8
B 10 247 233450 300.76 3583 3438 764.8
C 15 224 12618719 13604.77 3433 3398 927.3
C 6 223 409206 437.64 3433 3398 927.3
C 14 254 376528 402.4 3433 3398 927.3
D 8 240 6697474 7124.25 3369 3222 939.6
D 15 142 2923525 3107.89 3369 3222 939.6
D 2 120 2152781 2287.63 3369 3222 939.6

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