ASTROSAT CZTI

Data Quality Report

Orbit 20151114_P01_141T01_9000000104_level2

Creation date: 2025-10-23T12:30:05.842747
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/AS1P01_141T01_9000000104cztM0_level2.fits modeM0/AS1P01_141T01_9000000104cztM0_level2_quad_clean.evt
Size (bytes)289,681,920336,778,560
Size276.3 MB 321.2 MB
Events in quadrant A1,690,7102,049,275
Events in quadrant B1,681,2042,078,925
Events in quadrant C1,650,6141,965,869
Events in quadrant D1,424,1261,779,285

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0770
B0770
C0770
D0770

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01452140
B01577500
C01593540
D01456680

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06940
B06940
C06940
D06940

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A338492770.818340%
B338492450.723803%
C338491060.313155%
D338484161.229024%

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 41639 33848 0 0 0.00% 0.00%
B 41639 33849 0 0 0.00% 0.00%
C 41639 33849 0 0 0.00% 0.00%
D 41639 33849 0 0 0.00% 0.00%

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 7 110 1645 11.6 439 408 106.7
A 0 29 1469 9.95 439 408 106.7
A 14 188 1273 8.11 439 408 106.7
B 2 9 1419 12.42 443 421 80.3
B 10 225 1109 8.56 443 421 80.3
B 14 254 1096 8.4 443 421 80.3
C 1 81 1176 7.09 435 402 109.1
C 2 191 1124 6.62 435 402 109.1
C 12 241 1091 6.31 435 402 109.1
D 6 44 1095 7.32 406 372 98.7
D 6 231 1076 7.13 406 372 98.7
D 11 82 1004 6.4 406 372 98.7

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