ASTROSAT CZTI

Data Quality Report

Orbit 20170625_A02_178T01_9000001340_level2

Creation date: 2025-11-14T21:10:19.675937
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/AS1A02_178T01_9000001340cztM0_level2.fits modeM0/AS1A02_178T01_9000001340cztM0_level2_quad_clean.evt
Size (bytes)790,467,840725,391,360
Size753.8 MB 691.8 MB
Events in quadrant A5,005,6314,474,171
Events in quadrant B4,828,8884,419,033
Events in quadrant C3,924,4943,226,533
Events in quadrant D4,302,1953,978,127

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018840
B018960
C018940
D019010

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01994170
B01867650
C01956320
D01917630

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01530
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8858011631.312937%
B887438660.975852%
C7425264418.674514%
D886657590.856031%

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 126811 93735 0 0 0.00% 0.00%
B 126811 93888 0 0 0.00% 0.00%
C 108262 76322 0 0 0.00% 0.00%
D 126811 93844 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 0 29 4987 11.51 1304 1222 327.1
A 7 110 4229 9.19 1304 1222 327.1
A 0 30 3862 8.07 1304 1222 327.1
B 2 9 4120 11.56 1275 1214 251.3
B 14 254 3324 8.4 1275 1214 251.3
B 5 128 3283 8.23 1275 1214 251.3
C 12 241 2760 6.59 1037 962 272.7
C 9 242 2644 6.17 1037 962 272.7
C 2 191 2609 6.04 1037 962 272.7
D 6 231 3250 6.51 1227 1113 328.0
D 1 19 3081 6.0 1227 1113 328.0
D 7 5 3078 5.99 1227 1113 328.0

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