ASTROSAT CZTI

Data Quality Report

Orbit 55734

Creation date: 2026-01-16T16:36:46.806669
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_099T04_9000006540_55734cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55734cztM0_level2_quad_clean.evt
Size (bytes)944,133,12076,772,160
Size900.4 MB 73.2 MB
Events in quadrant A11,344,645350,272
Events in quadrant B9,198,109449,263
Events in quadrant C6,018,443577,124
Events in quadrant D7,866,044477,506

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0384028
B0320471
C0225131
D0280291

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6747326948.451163%
B6747253837.616719%
C67476209.189269%
D6747142621.135319%

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 7807 6748 2934 2934 37.58% 43.48%
B 7807 6748 2221 2221 28.45% 32.91%
C 7807 6748 535 535 6.85% 7.93%
D 7807 6748 1124 1124 14.40% 16.66%

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 12 115 4902568 34385.09 576 562 142.6
A 15 32 3765795 26411.2 576 562 142.6
A 8 192 132705 926.92 576 562 142.6
B 4 206 6811311 54599.61 578 559 124.7
B 0 199 61395 487.7 578 559 124.7
B 12 111 15246 117.74 578 559 124.7
C 15 199 1714709 9245.89 678 670 185.4
C 9 38 930868 5017.69 678 670 185.4
C 3 248 252069 1356.1 678 670 185.4
D 11 129 4398405 24480.0 633 605 179.6
D 6 239 790151 4394.94 633 605 179.6
D 10 181 76483 422.37 633 605 179.6

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