ASTROSAT CZTI

Data Quality Report

Orbit 56371

Creation date: 2026-02-28T04:17:16.075289
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_083T05_9000006554_56371cztM0_level2.fits modeM0/AS1A14_083T05_9000006554_56371cztM0_level2_quad_clean.evt
Size (bytes)1,036,258,56061,053,120
Size988.3 MB 58.2 MB
Events in quadrant A14,308,319205,860
Events in quadrant B4,500,516631,344
Events in quadrant C5,206,614542,240
Events in quadrant D13,827,3254,546

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0468471
B0180311
C0202241
D0456851

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6661468970.394836%
B66614326.485513%
C66616539.803333%
D6662660399.114380%

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 7505 6660 4672 4672 62.25% 70.15%
B 7506 6662 371 371 4.94% 5.57%
C 7506 6662 645 645 8.59% 9.68%
D 7506 6661 3897 3897 51.92% 58.50%

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 12 3 10136940 96913.25 407 398 104.6
A 12 194 1209472 11559.69 407 398 104.6
A 4 95 681794 6514.68 407 398 104.6
B 4 206 784013 5509.9 672 649 142.2
B 5 185 261484 1834.62 672 649 142.2
B 10 247 170008 1191.21 672 649 142.2
C 15 230 1698392 9688.38 635 629 175.2
C 12 252 339756 1935.25 635 629 175.2
C 13 3 269185 1532.53 635 629 175.2
D 8 129 13537677 969825.81 41 39 14.0
D 6 239 35088 2510.88 41 39 14.0
D 7 96 25784 1844.35 41 39 14.0

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