ASTROSAT CZTI

Data Quality Report

Orbit 58457

Creation date: 2026-07-18T11:25:48.849920
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_045T01_9000006590_58457cztM0_level2.fits modeM0/AS1A14_045T01_9000006590_58457cztM0_level2_quad_clean.evt
Size (bytes)561,427,20092,954,880
Size535.4 MB 88.6 MB
Events in quadrant A3,275,711654,413
Events in quadrant B9,193,151480,889
Events in quadrant C3,426,067627,937
Events in quadrant D4,353,385572,768

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0146772
B0319524
C0152032
D0178292

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68651341.951930%
B6864246935.970280%
C68641632.374709%
D68643515.113636%

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 7620 6865 11 11 0.14% 0.16%
B 7618 6863 2187 2187 28.71% 31.87%
C 7619 6865 104 104 1.37% 1.51%
D 7619 6864 255 255 3.35% 3.72%

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 80 114108 586.9 781 762 193.1
A 3 14 42173 214.42 781 762 193.1
A 3 245 20964 104.61 781 762 193.1
B 5 172 3676098 28146.85 601 578 130.6
B 2 249 2716204 20796.05 601 578 130.6
B 8 128 216197 1651.19 601 578 130.6
C 14 254 308623 1482.92 752 746 207.6
C 13 3 53720 255.15 752 746 207.6
C 14 245 23290 108.59 752 746 207.6
D 8 240 920463 4395.27 738 704 209.3
D 5 32 209938 999.87 738 704 209.3
D 12 248 74262 351.51 738 704 209.3

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