ASTROSAT CZTI

Data Quality Report

Orbit 58921

Creation date: 2026-08-18T16:13:44.334494
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_004T07_9000006598_58921cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58921cztM0_level2_quad_clean.evt
Size (bytes)544,095,36097,439,040
Size518.9 MB 92.9 MB
Events in quadrant A4,496,792641,339
Events in quadrant B3,517,522708,452
Events in quadrant C3,947,092625,980
Events in quadrant D7,667,620514,852

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0176502
B0149112
C0162462
D0274452

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65934426.704080%
B65932684.064917%
C65932934.444107%
D6592121318.401092%

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 7618 6594 221 221 2.90% 3.35%
B 7618 6593 30 30 0.39% 0.46%
C 7618 6594 129 129 1.69% 1.96%
D 7617 6592 981 981 12.88% 14.88%

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 14 238 1413573 7420.92 769 749 190.4
A 15 233 38544 198.52 769 749 190.4
A 5 113 26889 137.3 769 749 190.4
B 4 171 149912 919.28 762 734 162.3
B 10 247 103187 631.35 762 734 162.3
B 4 236 89365 546.17 762 734 162.3
C 12 249 223844 1104.88 739 733 201.9
C 12 252 211058 1041.57 739 733 201.9
C 3 233 127474 627.64 739 733 201.9
D 12 110 4127317 19982.81 723 690 206.5
D 11 129 310083 1498.2 723 690 206.5
D 7 222 151492 730.24 723 690 206.5

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

TCT plots

Parameter TCT0 TCT_healed
Tct