ASTROSAT CZTI

Data Quality Report

Orbit 58550

Creation date: 2026-07-24T18:38:36.144824
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_044T04_9000006592_58550cztM0_level2.fits modeM0/AS1A14_044T04_9000006592_58550cztM0_level2_quad_clean.evt
Size (bytes)1,388,160,000285,667,200
Size1.3 GB 272.4 MB
Events in quadrant A10,493,3481,856,438
Events in quadrant B11,718,7402,016,412
Events in quadrant C12,812,6091,783,944
Events in quadrant D14,777,2381,583,409

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0454882
B0485762
C0520322
D0578575

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04120
B04120
C04120
D04120

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A204576463.157843%
B204577923.871535%
C204577333.583126%
D2045715307.479103%

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 21387 20459 185 185 0.87% 0.90%
B 21387 20459 175 175 0.82% 0.86%
C 21387 20459 344 344 1.61% 1.68%
D 21387 20459 1069 1069 5.00% 5.23%

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 10 17 859085 1512.33 2295 2231 566.6
A 3 14 170111 296.3 2295 2231 566.6
A 13 248 156965 273.1 2295 2231 566.6
B 0 171 947944 1957.22 2264 2172 483.2
B 8 234 493040 1015.82 2264 2172 483.2
B 0 186 325902 669.94 2264 2172 483.2
C 12 252 1160836 1912.75 2220 2202 605.7
C 15 147 1037775 1709.59 2220 2202 605.7
C 6 223 650898 1070.91 2220 2202 605.7
D 3 12 1894180 3091.45 2171 2074 612.0
D 8 240 1483136 2419.86 2171 2074 612.0
D 2 31 976958 1592.83 2171 2074 612.0

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