ASTROSAT CZTI

Data Quality Report

Orbit 20171125_A04_227T01_9000001724_level2

Creation date: 2025-11-18T17:48:46.110729
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/AS1A04_227T01_9000001724cztM0_level2.fits modeM0/AS1A04_227T01_9000001724cztM0_level2_quad_clean.evt
Size (bytes)1,271,145,6001,152,630,720
Size1.2 GB 1.1 GB
Events in quadrant A7,594,3946,604,696
Events in quadrant B7,553,0886,811,494
Events in quadrant C7,824,4046,947,325
Events in quadrant D6,175,5985,210,861

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04257150
B03476560
C02802300
D05118150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A027720
B027720
C027720
D027720

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02150
B02150
C02150
D02150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A136178119648.785560%
B13620066854.908223%
C1362008850.649780%
D1361762471618.150041%

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 157585 136138 0 0 0.00% 0.00%
B 157585 136029 0 0 0.00% 0.00%
C 157585 136201 0 0 0.00% 0.00%
D 157585 136057 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 7279 11.03 1982 1854 491.7
A 7 110 6259 8.96 1982 1854 491.7
A 0 30 5547 7.51 1982 1854 491.7
B 2 9 6550 11.82 1995 1896 393.7
B 3 17 4984 7.84 1995 1896 393.7
B 5 225 4968 7.8 1995 1896 393.7
C 1 81 5877 7.37 2065 1918 537.1
C 1 80 5871 7.36 2065 1918 537.1
C 12 241 5553 6.77 2065 1918 537.1
D 6 231 4620 6.34 1761 1595 477.1
D 3 14 4572 6.24 1761 1595 477.1
D 7 5 4402 5.88 1761 1595 477.1

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