ASTROSAT CZTI

Data Quality Report

Orbit 58881

Creation date: 2026-08-16T00:21:11.597709
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_58881cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58881cztM0_level2_quad_clean.evt
Size (bytes)715,259,520111,458,880
Size682.1 MB 106.3 MB
Events in quadrant A5,002,571755,848
Events in quadrant B4,175,284805,645
Events in quadrant C3,861,463726,991
Events in quadrant D12,835,107544,839

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200380
B0178750
C0170810
D0435710

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A77841852.376670%
B77841381.772867%
C7785410.526654%
D7785191824.637123%

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 7784 7784 212 212 2.72% 2.72%
B 7784 7784 58 58 0.75% 0.75%
C 7785 7785 33 33 0.42% 0.42%
D 7785 7785 2022 2022 25.97% 25.97%

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 15 233 764352 3539.7 872 846 215.7
A 14 238 387380 1792.02 872 846 215.7
A 0 24 174182 803.61 872 846 215.7
B 4 236 147375 801.88 857 827 182.8
B 5 185 142709 776.34 857 827 182.8
B 4 171 131489 714.95 857 827 182.8
C 6 13 122728 523.12 849 840 233.0
C 14 96 91633 389.67 849 840 233.0
C 7 87 76034 322.72 849 840 233.0
D 12 110 7814478 34878.02 786 749 224.0
D 11 129 962037 4290.89 786 749 224.0
D 2 249 221516 985.43 786 749 224.0

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

TCT plots

Parameter TCT0 TCT_healed
Tct