ASTROSAT CZTI

Data Quality Report

Orbit 58878

Creation date: 2026-08-15T19:13:12.440275
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_58878cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58878cztM0_level2_quad_clean.evt
Size (bytes)612,480,960101,367,360
Size584.1 MB 96.7 MB
Events in quadrant A4,558,469703,456
Events in quadrant B4,175,530743,654
Events in quadrant C8,157,897519,944
Events in quadrant D5,226,892606,009

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0184012
B0172042
C02907626
D02034511

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71283234.531425%
B71284055.681818%
C7125182225.571930%
D71265207.297221%

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 7993 7128 93 93 1.16% 1.30%
B 7993 7128 173 173 2.16% 2.43%
C 7992 7124 1632 1632 20.42% 22.91%
D 7993 7128 354 354 4.43% 4.97%

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 14 238 1083237 5387.27 821 798 200.9
A 3 14 192335 953.27 821 798 200.9
A 13 248 29408 142.39 821 798 200.9
B 4 236 549909 3201.45 801 770 171.5
B 0 171 99037 572.89 801 770 171.5
B 6 255 88226 509.86 801 770 171.5
C 9 38 5102282 27204.18 682 673 187.5
C 6 223 113640 602.39 682 673 187.5
C 7 87 84227 445.55 682 673 187.5
D 11 129 519266 2323.74 784 748 223.1
D 5 38 346101 1547.7 784 748 223.1
D 8 160 331629 1482.84 784 748 223.1

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