ASTROSAT CZTI

Data Quality Report

Orbit 51557

Creation date: 2025-04-10T03:15:10.234827
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/AS1A13_037T05_9000006460_51557cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51557cztM0_level2_quad_clean.evt
Size (bytes)827,328,96090,869,760
Size789.0 MB 86.7 MB
Events in quadrant A8,348,001589,846
Events in quadrant B11,154,679454,501
Events in quadrant C5,213,701627,397
Events in quadrant D5,352,262578,549

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0298210
B0381093
C0207300
D0210170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7190111615.521558%
B7190311643.337969%
C71904746.592490%
D71904756.606398%

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 7190 7190 803 803 11.17% 11.17%
B 7190 7190 2680 2680 37.27% 37.27%
C 7190 7190 410 410 5.70% 5.70%
D 7190 7190 467 467 6.50% 6.50%

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 3 1960465 10731.83 733 717 182.6
A 12 250 1952495 10688.19 733 717 182.6
A 7 64 376669 2058.76 733 717 182.6
B 10 44 4274908 30626.32 644 620 139.6
B 10 41 1973583 14136.76 644 620 139.6
B 12 18 1078039 7719.97 644 620 139.6
C 0 177 1711168 8441.85 738 730 202.6
C 13 3 192035 944.18 738 730 202.6
C 15 157 125170 614.17 738 730 202.6
D 12 6 962897 4734.57 724 699 203.2
D 8 176 729695 3587.08 724 699 203.2
D 2 120 201018 985.68 724 699 203.2

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